A class of asbestos that includes silicates of magnesium, iron, calcium, and sodium. The fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Asbestos. Fibrous incombustible mineral composed of magnesium and calcium silicates with or without other elements. It is relatively inert chemically and used in thermal insulation and fireproofing. Inhalation of dust causes asbestosis and later lung and gastrointestinal neoplasms.
A type of asbestos that occurs in nature as the dihydrate of magnesium silicate. It exists in two forms: antigorite, a plated variety, and chrysotile, a fibrous variety. The latter makes up 95% of all asbestos products. (From Merck Index, 11th ed, p.893)
A lavender, acid-resistant asbestos.
Asbestos, grunerite. A monoclinic amphibole form of asbestos having long fibers and a high iron content. It is used in insulation. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Long, pliable, cohesive natural or manufactured filaments of various lengths. They form the structure of some minerals. The medical significance lies in their potential ability to cause various types of PNEUMOCONIOSIS (e.g., ASBESTOSIS) after occupational or environmental exposure. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p708)
A tumor derived from mesothelial tissue (peritoneum, pleura, pericardium). It appears as broad sheets of cells, with some regions containing spindle-shaped, sarcoma-like cells and other regions showing adenomatous patterns. Pleural mesotheliomas have been linked to exposure to asbestos. (Dorland, 27th ed)
A form of pneumoconiosis caused by inhalation of asbestos fibers which elicit potent inflammatory responses in the parenchyma of the lung. The disease is characterized by interstitial fibrosis of the lung, varying from scattered sites to extensive scarring of the alveolar interstitium.
Neoplasms of the thin serous membrane that envelopes the lungs and lines the thoracic cavity. Pleural neoplasms are exceedingly rare and are usually not diagnosed until they are advanced because in the early stages they produce no symptoms.
Finely powdered native hydrous magnesium silicate. It is used as a dusting powder, either alone or with starch or boric acid, for medicinal and toilet preparations. It is also an excipient and filler for pills, tablets, and for dusting tablet molds. (From Merck Index, 11th ed)
A hydrated form of silicon dioxide. It is commonly used in the manufacture of TOOTHPASTES and as a stationary phase for CHROMATOGRAPHY.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
The thin serous membrane enveloping the lungs (LUNG) and lining the THORACIC CAVITY. Pleura consist of two layers, the inner visceral pleura lying next to the pulmonary parenchyma and the outer parietal pleura. Between the two layers is the PLEURAL CAVITY which contains a thin film of liquid.
Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Diseases caused by factors involved in one's employment.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.
Tumors or cancer of the LUNG.
The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.
Substances that increase the risk of NEOPLASMS in humans or animals. Both genotoxic chemicals, which affect DNA directly, and nongenotoxic chemicals, which induce neoplasms by other mechanism, are included.
Supplies used in building.
Relating to the size of solids.
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
Branch of medicine concerned with the prevention and control of disease and disability, and the promotion of physical and mental health of the population on the international, national, state, or municipal level.
A publication issued at stated, more or less regular, intervals.
A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)
The evaluation by experts of the quality and pertinence of research or research proposals of other experts in the same field. Peer review is used by editors in deciding which submissions warrant publication, by granting agencies to determine which proposals should be funded, and by academic institutions in tenure decisions.
The study of the structure, growth, function, genetics, and reproduction of bacteria, and BACTERIAL INFECTIONS.
The profession of writing. Also the identity of the writer as the creator of a literary production.
Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are petroleum, coal, and natural gas.
The scientific study of past societies through artifacts, fossils, etc.

Biological effects of naturally occurring and man-made fibres: in vitro cytotoxicity and mutagenesis in mammalian cells. (1/97)

Cytotoxicity and mutagenicity of tremolite, erionite and the man-made ceramic (RCF-1) fibre were studied using the human-hamster hybrid A(L) cells. Results from these fibres were compared with those of UICC Rhodesian chrysotile fibres. The A(L) cell mutation assay, based on the S1 gene marker located on human chromosome 11, the only human chromosome contained in the hybrid cell, has been shown to be more sensitive than conventional assays in detecting deletion mutations. Tremolite, erionite and RCF-1 fibres were significantly less cytotoxic to A(L) cells than chrysotile. Mutagenesis studies at the HPRT locus revealed no significant mutant yield with any of these fibres. In contrast, both erionite and tremolite induced dose-dependent S1- mutations in fibre-exposed cells, with the former inducing a significantly higher mutant yield than the latter fibre type. On the other hand, RCF-1 fibres were largely non-mutagenic. At equitoxic doses (cell survival at approximately 0.7), erionite was found to be the most potent mutagen among the three fibres tested and at a level comparable to that of chrysotile fibres. These results indicate that RCF-1 fibres are non-genotoxic under the conditions used in the studies and suggest that the high mesothelioma incidence previously observed in hamster may either be a result of selective sensitivity of hamster pleura to fibre-induced chronic irritation or as a result of prolonged fibre treatment. Furthermore, the relatively high mutagenic potential for erionite is consistent with its documented carcinogenicity.  (+info)

Chrysotile, tremolite and fibrogenicity. (2/97)

Recently published analyses have shown that the risks of mesothelioma and lung cancer in Quebec chrysotile miners and millers were related to estimated level of fibrous tremolite in the mines where they had worked. An analysis has therefore been made of radiographic changes in men who in 1965 were employed by companies in Thetford Mines where the same question could be examined for fibrogenicity. Of 294 men who met the necessary requirements, 129 had worked in six centrally located mines, where the tremolite content was thought to be high, 81 in 10 peripheral mines where it was thought to be low and 84 in both. The median prevalence of small parenchymal opacities (> or = 1/0) in chest radiographs read by six readers was higher among men ever than never employed in the central mines (13.6% against 7.4%), despite the fact that the mean cumulative exposure was lower in the former (430 mpcf.y vs 520 mpcf.y). After accounting by logistic regression for cigarette smoking, age, smoking-age interaction and cumulative exposure, the adjusted odds ratio for central mine employment was 2.44 (95% lower bound: 1.06). Together with other surveys of asbestos miners and millers, this study suggests that amphibole fibres, including tremolite, are more fibrogenic than chrysotile, perhaps to the same extent that they are carcinogenic, though the data available were not sufficient to address the latter question.  (+info)

Environmental exposure to tremolite and respiratory cancer in New Caledonia: a case-control study. (3/97)

A case-control study on respiratory cancers was conducted in New Caledonia (South Pacific), where a high incidence of malignant pleural mesothelioma had been observed. The disease pattern suggested an environmental exposure to asbestos. The first results showed that, in some areas, tremolite asbestos derived from local outcroppings was used as whitewash (locally named "po"). All cases diagnosed between 1993 and 1995 (including 15 pleural mesotheliomas, 228 lung cancers, and 23 laryngeal cancers) and 305 controls were included in the study. Detailed information on past or present use of the whitewash, residential history, smoking, diet, and occupation was collected. The risk of mesothelioma was strongly associated with the use of the whitewash (odds ratio (OR) = 40.9; 95% confidence interval (CI): 5.15, 325). All Melanesian cases had been exposed. Among Melanesian women, exposure to the whitewash was associated with an increased risk of lung cancer (OR = 4.89; 95% CI: 1.13, 21.2), and smokers exposed to po had an approximately ninefold risk (OR = 9.26; 95% CI: 1.72, 49.7) compared with women who never smoked and had never used the whitewash. In contrast, no association was noted between exposure to po and lung cancer risk among Melanesian men, probably because of lower exposure levels. Among non-Melanesians, the numbers of exposed subjects were too small to assess the effect of exposure to po. There was no indication of elevated risks for the other cancer sites.  (+info)

The quantitative risks of mesothelioma and lung cancer in relation to asbestos exposure. (4/97)

Mortality reports on asbestos exposed cohorts which gave information on exposure levels from which (as a minimum) a cohort average cumulative exposure could be estimated were reviewed. At exposure levels seen in occupational cohorts it is concluded that the exposure specific risk of mesothelioma from the three principal commercial asbestos types is broadly in the ratio 1:100:500 for chrysotile, amosite and crocidolite respectively. For lung cancer the conclusions are less clear cut. Cohorts exposed only to crocidolite or amosite record similar exposure specific risk levels (around 5% excess lung cancer per f/ml.yr); but chrysotile exposed cohorts show a less consistent picture, with a clear discrepancy between the mortality experience of a cohort of xhrysotile textile workers in Carolina and the Quebec miners cohort. Taking account of the excess risk recorded by cohorts with mixed fibre exposures (generally<1%), the Carolina experience looks uptypically high. It is suggested that a best estimate lung cancer risk for chrysotile alone would be 0.1%, with a highest reasonable estimate of 0.5%. The risk differential between chrysotile and the two amphibole fibres for lunc cancer is thus between 1:10 and 1:50. Examination of the inter-study dose response relationship for the amphibole fibres suggests a non-linear relationship for all three cancer endpoints (pleural and peritoneal mesotheliomas, and lung cancer). The peritoneal mesothelioma risk is proportional to the square of cumulative exposure, lung cancer risk lies between a linear and square relationship and pleural mesothelioma seems to rise less than linearly with cumulative dose. Although these non-linear relationships provide a best fit ot the data, statistical and other uncertainties mean that a linear relationship remains arguable for pleural and lung tumours (but not or peritoneal tumours). Based on these considerations, and a discussion fo the associated uncertainties, a series of quantified risk summary statements for different elvels of cumulative exposure are presented.  (+info)

Amphibole fibres in Chinese chrysotile asbestos. (5/97)

Ten chrysotile bulk samples originating from six Chinese chrysotile mines were studied for amphibole fibres. Five of the mines operate on ultramafic rocks whereas one exploits a dolomite-hosted deposit. The asbestos fibre content in lung tissue was examined from seven deceased workers of the Shenyang asbestos plant using these raw materials. The bulk samples were pretreated with acid/alkali-digestion, and thereafter, scanning and transmission electron microscopy, X-ray microanalysis, selected area electron diffraction and X-ray powder diffractometry were used to identify the minerals. Sample preparation of lung tissue involved drying and low-temperature ashing. All of the bulk samples contained amphibole fibres as an impurity. The amphibole asbestos contents were between 0.002 and 0.310 w-%. Tremolite fibres were detected in every sample but anthophyllite fibres were present only in the sample originating from the dolomite-hosted deposit. In comparison, anthophyllite (71%), tremolite (9%) and chrysotile (10%) were the main fibre types in the lung tissue samples indicating faster pulmonary clearance of chrysotile fibres. The total levels ranged from 2.4 to 148.3 million fibres (over 1 microm in length) per gram of dry tissue, and they were consistent with heavy occupational exposure to asbestos.  (+info)

Erionite bodies and fibres in bronchoalveolar lavage fluid (BALF) of residents from Tuzkoy, Cappadocia, Turkey. (6/97)

OBJECTIVES: The high incidence of malignant mesothelioma in some villages of Cappadocia (Turkey) is due to environmental exposure to erionite fibres. The aim was to evaluate the fibre burden in bronchoalveolar lavage fluid (BALF) from inhabitants of an erionite village and compare it with Turkish subjects with or without environmental exposure to tremolite asbestos. METHODS: Ferruginous bodies (FBs) and fibres were measured and analyzed by light and transmission electron microscopy (TEM) in the BALF of 16 subjects originating from Tuzkoy. RESULTS: FBs were detected in the BALF of 12 subjects, with concentrations above 1 FB/ml in seven of them. Erionite was the central fibre of 95.7% of FBs. Erionite fibres were found in the BALF of all subjects, by TEM, and these fibres were low in Mg, K, and Ca compared with erionite from Tuzkoy soil. The mean concentration of erionite fibres in BALF was similar to that of tremolite fibres in Turks with environmental exposure to tremolite. The proportion of fibres longer than 8 microm in BALF represented 35.6% for erionite compared with 14.0% for tremolite. The asbestos fibre concentrations in erionite villagers was not different from that in Turks without environmental exposure to tremolite. CONCLUSION: Analysis of BALF gives information about fibre retention in populations environmentally exposed to erionite for whom data on fibre burden from lung tissue samples are scarce. This may apply to exposed Turks having emigrated to other countries.  (+info)

Dustiness of different high-temperature insulation wools and refractory ceramic fibres. (7/97)

Recent regulations are encouraging the replacement of older types of man-made mineral fibre by more soluble and, thus, less biopersistent compositions. In order for there to be any health benefits from this policy and to gain maximum benefit from such substitutions, the use of the new materials should not increase exposure. The work reported here was undertaken to investigate the use of new high-temperature glass insulation wools in place of refractory ceramic fibres (RCF). Airborne fibre levels occurring during the manufacture of both RCF and calcium magnesium silicate wools (CMS) were compared using measurements of genuine workplace exposure from a routine monitoring operation on the same plant. Exposures during use were compared in one customer facility where RCF and CMS blankets were used for the same task. Further comparisons were made in a laboratory test of dustiness using a "shaking box test". For some manufacturing tasks there are only a few workplace samples and there are few opportunities for genuine comparisons with both RCF and CMS in identical uses. However, both materials produced very similar exposure levels during manufacture, use and in the laboratory test. The novel magnesium silicate fibre was significantly dustier in the laboratory test.  (+info)

p53, p21 and metallothionein immunoreactivities in patients with malignant pleural mesothelioma: correlations with the epidemiological features and prognosis of mesotheliomas with environmental asbestos exposure. (8/97)

The aim of this study is to investigate immunoreactivity for p53, p21 and metallothionein in diffuse malignant pleural mesothelioma (DMPM) and to determine the relationships between the age, sex, asbestos exposure time, survival of DMPM patients with environmental asbestos exposure and immunoreactivity to p53, p21 and metallothionein. Sixty-seven histopathologically-confirmed DMPMs, 38 of whom had environmental and 29 had occupational asbestos exposure, were included. The tumour tissue samples were immunostained with antibodies against p53, p21 and metallothionein. Epidemiological data and the survival times for the DMPM patients with environmental asbestos exposures were obtained from hospital records. Thirty-three per cent of the DMPMs were positive for p53, 35% for p21 and 52% for metallothionein. There was no statistical difference between the histological subtypes of DMPM in terms of immunoreactivity for p53, p21 and metallothionein. For p21 and metallothionein there was a statistically significant difference between the exposure characteristics: patients with environmental asbestos exposure had shown more immunopositivity. There were statistically significant differences between age groups and between asbestos exposure times for metallothionein, and between asbestos exposure times and p21. The patients with positive immunostaining had longer exposure times and were older than those having negative immunostaining. The differences between survival of the patients were not statistically significant in terms of the immunohistochemical results for p53, p21 and metallothionein.  (+info)

Environmental exposure to silicate compounds such as silica and asbestos has been associated with increased autoimmune responses and the development of autoimmune disease in humans. Residents of Libby, MT have experienced significant asbestos exposure due to an asbestos contaminated vermiculite mine near the community over several decades. Residents have developed numerous asbestos-related diseases as well as increased autoimmune responses. However, the exact mechanism by which Libby amphibole asbestos generates autoimmune responses is unclear. To elucidate a possible mechanism for asbestos induced autoimmunity, the cellular effects of Libby amphibole asbestos were characterized in vitro using a phagocytic murine macrophage cell line, which are characteristic of alveolar macrophages. Our results indicate that Libby amphibole asbestos generates oxidative stress in murine macrophages similar to crocidolite asbestos. However, Libby asbestos induces distinct cellular effects compared to crocidolite asbestos
Libby, Montana, a small town nestled in the northwestern corner of the state, is a humble town, a great destination for anglers and hunters. What many people don't know about Libby, is the lurking danger hanging over the heads of the 3,000 or so Libby residents. Located nearby is an old vermiculite mine that has created a health hazard dealing with asbestos. The old mine was used for acquiring vermiculite, that was used for insulation, shingles, and other construction materials. Imbedded in the vermiculite is a form of asbestos that was released into the air when the vermiculite was processed, creating an abundance of the fibers released into the atmosphere around Libby. The health risk, amplified by human activity, has always been a health hazard due to natural geologic deposits of vermiculite containing asbestos, in and around the Libby area.
Synonyms for amphibole in Free Thesaurus. Antonyms for amphibole. 8 words related to amphibole: mineral, amphibole group, amphibolite, nephrite, actinolite, anthophyllite, asbestos, hornblende. What are synonyms for amphibole?
Tremolite is a member of the amphibole group of silicate minerals with composition: ☐Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2. Tremolite forms by metamorphism of sediments rich in dolomite and quartz. Tremolite forms a series with actinolite and ferro-actinolite. Pure magnesium tremolite is creamy white, but the color grades to dark green with increasing iron content. It has a hardness on Mohs scale of 5 to 6. Nephrite, one of the two minerals of the gemstone jade, is a green variety of tremolite. The fibrous form of tremolite is one of the six recognised types of asbestos. This material is toxic and inhaling the fibers can lead to asbestosis, lung cancer and both pleural and peritoneal mesothelioma. Fibrous tremolite is sometimes found as a contaminant in vermiculite, chrysotile (itself a type of asbestos) and talc. Tremolite is an indicator of metamorphic grade since at high temperatures it converts to diopside. Tremolite occurs as a result of contact metamorphism of calcium and magnesium rich ...
Gunter takes exception to a recent legal definition of asbestos; but there is more to that story. For over 70 years, the fibrous amphibole that is a major-not trace-constituent in the Vermiculite Mountain vermiculite deposit near Libby, Montana, was called tremolite, sodium-rich tremolite, or sodic tremolite by everyone including the mineralogists and geologists who studied the deposit. During the 1970s, the names of the regulated asbestos minerals, including tremolite asbestos, were entered into the U.S. Code of Federal Regulations. As recent court proceedings have revealed, company geologists, owners, and operators of the vermiculite mine near Libby understood that the asbestiform amphiboles in the mine fell under those regulations. In 1978 and 1997, committees of the International Mineralogical Association published new recommendations for amphibole nomenclature. Based on this new system of nomenclature, most of the amphibole minerals at the Libby mine were reclassified as winchite. When ...
Langer and Nolan, and Mossman and Gee, express several criticisms of our recent review of the amphibole hypothesis. Langer and Nolan suggested that we failed to present the amphibole hypothesis in a developmental perspective. Our objective was to put this hypothesis in a public health perspective. The scope of the amphibole hypothesis has been confusing to many, scientists and laypeople alike. We
The Lincoln County Asbestos Resource Program is a program that was established in 2012 with the mission of reducing exposure to Libby amphibole asbestos that is found within the Libby Asbestos Superfund Site and the surrounding areas of Lincoln County. A key goal is to minimize burden on the community members themselves. The program was developed under the guidance of the City-County Board of Health for Lincoln County and is currently funded through a cooperative agreement/grant from the U.S. EPA ...
We conducted experiments to examine the effect of amphibole-forming hydration reactions on mineral fabric development and the strength of mafic rocks. Both hydrostatic and general shear deformation experiments were conducted on powdered basalt with added water at lower continental crust conditions (800 °C, 1 GPa). Amphibole that formed under hydrostatic conditions exhibits a random lattice-preferred orientation (LPO). In contrast, amphibole formed during deformation exhibits both a strong shape-preferred orientation (SPO) and LPO with a [001] maximum aligned subparallel to the shear direction. Plagioclase in both hydrostatic and deformed samples shows a very weak to random LPO. At low effective strain rates (10−5 s−1 to 10−6 s−1), the stress exponent is ≈1-1.5, consistent with deformation accommodated by diffusion creep. The correlation of the SPO and LPO coupled with the rheological evidence for diffusion creep indicates that the amphibole fabric results from oriented grain growth ...
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Anthophyllite is an amphibole mineral: ☐Mg2Mg5Si8O22(OH)2 (☐ is for a vacancy, a point defect in the crystal structure), magnesium iron inosilicate hydroxide. Anthophyllite is polymorphic with cummingtonite. Some forms of anthophyllite are lamellar or fibrous and are classed as asbestos. The name is derived from the Latin word anthophyllum, meaning clove, an allusion to the most common color of the mineral. Anthophylite is the product of metamorphism of magnesium-rich rocks, especially ultrabasic igneous rocks and impure dolomitic shales. It also forms as a retrograde product rimming relict orthopyroxenes and olivine, and as an accessory mineral in cordierite-bearing gneisses and schists. Anthophyllite also occurs as a retrograde metamorphic mineral derived from ultramafic rocks along with serpentinite. Geographically, it occurs in Pennsylvania, southwestern New Hampshire, central Massachusetts, Franklin, North Carolina, and in the Gravelly Range and Tobacco Root Mountains of southwest ...
Abstract: There has been considerable discussion in the literature related to the use of standard optical properties of commercial asbestos minerals for the classification of amphibole minerals found in raw materials as either asbestiform or as non-asbestos (1-4). The goal of this study was to ascertain if there is a relationship between particle morphology and extinction characteristics in monoclinic tremolite amphiboles. Six tremolitic amphiboles were chosen for this study: three are fibrous (five from natural sites (i.e., mining locales)) and one is the NIST SRM 1867a tremolite standard. The morphology of these tremolites ranged from blocky to asbestiform. A particle-by-particle analysis was performed to determine extinction characteristics and the number of EPA-defined asbestos characteristics. In general, zero or near-zero extinction angles correlate to the number of asbestiform characteristics. Exceptions to this occur when a non-fibrous tremolite has (100) parting as a result of twinning ...
Asbestos Products The versatility of Asbestos enabled it to used across a variety of industries these includeAsbestos is contained in some 3000 products manufactured world wide Construction Industry - used 2/3 of all asbestos Car Manufacturing Textile Industry Aerospace Industry Marine and Rail Transport industries ConstructionIndustry Car Manufacturing Textile Industry…
Ferro-edenite is an uncommon amphibole mineral. It is almost exactly the same as the more common amphibole mineral edenite, but contains more iron than magnesium thus the name ferro-edenite (ferro is latin for iron). The two minerals form a solid solution series in which the iron and magnesium substitute for each other. Edenite is the magnesium rich member. The two are similar in properties except that ferro-edenite is generally darker and denser. Ferro-edenite is related to the more well known amphibole, hornblende. Although hornblende is no longer an official mineral, it still serves as a general name for iron, magnesium, aluminum and calcium rich amphiboles of which ferro-edenite is one. In fact ferro-edenite had been referred to as ferro-edenitic hornblende before its adoption as an official and distinct mineral. Amphiboles like ferro-edenite, edenite and hornblende serve as important petrographic minerals. Their presence allows petrologists (rock scientists) to accurately gauge the ...
Amphiboles along the tremolite-pargasite join have been hydrothermally synthesized at 900°C, 3 kbar. Run products were characterized by optical and electron microscopy, powder X-ray diffraction and infrared spectroscopy. Under the experimental conditions used, there is complete solid-solution between tremolite and pargasite and the variation of cell parameters is linear as a function of composition. The infrared spectra in the principal OH-stretching region are consistent with the predictions of Hawthorne (1997) on local bond-valence grounds, and show strong short-range order of cations at the octahedral sites and strong coupling between Al at T(l) and Na at A. ...
Hornblende is an important constituent of many igneous rocks. It is also an important constituent of the rock known as amphibolite, formed by metamorphism of basalt.. Actinolite is an important and common member of the monoclinic series, forming radiating groups of acicular (needle-like) crystals of bright green or grayish-green color. It occurs frequently as a constituent of greenschists. The name (from Greek ακτις/aktis, a ray and λιθος/lithos, a stone) is a translation of the old German word Strahlstein (radiated stone).. Glaucophane, crocidolite, riebeckite and arfvedsonite form a somewhat special group of alkali amphiboles. The first two are blue fibrous minerals, with glaucophane occurring in blueschists and crocidolite (blue asbestos) in ironstone formations-both result from dynamo-metamorphic processes. The latter two are dark green minerals that occur as original constituents of igneous rocks rich in sodium, such as nepheline-syenite and phonolite.. Pargasite is a rare, ...
Original Roadkill Gems design! This handmade sterling silver pendant features Amphibole Quartz, with a Horizon bail. Keep your favorite essential oils and perfumes close to you. Highlights: Each Rollerball necklace undergoes 7 stages of polishing 2ml vial holds about 20 drops of essential oils Pendant is paired with a
This testimony concerns the response to NIOSH to the OSHA notice of proposed rulemaking to remove nonasbestiform tremolite (14567738), anthophyllite (17068789), and actinolite (77536664) from the asbestos standard. The testimony contains comments on a review of the literature by OSHA, studies by OSHA on exposure to nonasbestiform minerals, and fiber characteristics studies reviewed by OSHA. The te
T H Agriculture & Nutrition, L.L.C. used asbestos, exposing people to the dangerous mineral. Learn about financial assistance for victims at Mesothelioma.com.
Armstrong World Industries incorporated asbestos into its insulation and other construction products for much of the 20th century.
Many products contain asbestos, especially products used in the building industry. See a list of products including Hardiflex, Hardiplank and more.
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Tyler Pipe manufactured cast iron soil pipes and fittings for waste removal. The company was once owned by Swan Transportation but is now owned by McWane, Inc. in Birmingham, Alabama.
Convert how many grams of saturated Fats (g sat. fat) from self raising flour (SRF) are in 1 gram of dietary fiber (g diet. fibre). This online self raising flour (SRF) conversion tool is for culinary arts schools and certified chefs. Convert self raising flour (srf) measuring units from grams of dietary fibers ( g diet. fibre ) into grams of saturated Fats ( g sat. fat ), volume vs weights measures, including dietary information and nutritional values instantly. The self raising flour (SRF) calculator can be used by culinarian cooks or in schools of culinary art classes or culinary colleges and even in international culinary education and pastry schools. 1 gram of dietary fiber g diet. fibre equals = 0.10 grams of saturated Fats g sat. fat in culinary training exactly.
Tremolite Magnesiocoulsonite. Comments: Black grains of magnesiocoulsonite with green chromian tremolite. Metallic bronze grain of thiospinelid of kalininite-florensovite series is visible in the upper right corner of the image ...
Ferripedrizite, a new monoclinic BLi amphibole end-member from the Eastern Pedriza Massif, Sierra de Guadarrama, Spain, and a restatement of the nomenclature of Mg-Fe-Mn-Li amphiboles 976 ...
Oberti R , Camara F , Caballero J M , Ottolini L , The Canadian Mineralogist , 41 (2003) p.1345-1354, Sodic-ferri-ferropedrizite and ferri-clinoferroholmquistite: mineral data and, degree of order of the A-site cations in Li-rich amphiboles, Sequence number in the CNR-IGG database: SEQ 1039 ...
Amphibole Group. Mg-Fe-Mn-Li Clino-Amphibole Subgroup. Many tirodites described in the literature are in fact manganocummingtonite.
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At its peak, the Libby mine may have provided 80 percent of the worlds vermiculite, most of which was contaminated with what would become known as Libby Amphibole Asbestos. The contamination was not limited just to the mine site; Libby residents were able to pick up free truckloads of asbestos-contaminated vermiculite for use at home. The vermiculite was used to pave driveways and in public areas (boat ramps, ice rink, running track, baseball fields and school yards). Children played in piles of vermiculite that could be found throughout the community. Also, attic insulation contaminated with Libby asbestos may still be in schools, businesses and as many as 35 million homes around the United States alone ...
Properly removing vermiculite from your home or office building requires expert assistance to ensure all traces of the harmful material is completely cleaned, and no harmful airborne fibres manage to spread. At Scott Asbestos, our team of professional cleaners are ready to take every precaution to ensure the vermiculite contamination in your property is properly dealt with. Vancouver, along with a number of other major residential areas of the lower mainland features a number of homes and properties that were built with materials containing vermiculite. Between 1970 and the early 1990s, a large number of construction companies made use of the vermiculite found in one mine in Montana. Unfortunately, it was later discovered that the vermiculite found in this mine had been contaminated with tremolite asbestos. Despite its effective insulation properties and the ease in which it can be installed, vermiculite is among one of the most hazardous building materials which can be found in BC homes and ...
A deposit in Libby, Montana was the largest in the world and 70 percent of all vermiculite sold in the United States between 1919 and 1990 was from Libby. There was a problem, though, with this source of vermiculite. It was contaminated with tremolite asbestos, a particularly dangerous form of asbestos. When the vermiculite was mined, millions of asbestos fibers were sent into the air sickening miners, their families, and townspeople.. Not only was asbestos sent into the air, ore from the mine was donated to schools to make running tracks, an ice rink, and was mixed with other materials to make baseball fields. Every day kids were exposed to asbestos when they played outside. A popping plant, where ore was taken to expand, was located next to baseball fields. This created more dust for children to inhale while they were playing.. W.R. Grace, the company that owned and operated the mine, knew that the vermiculite was contaminated with asbestos and was dangerous. It kept this information from ...
The accurate measurement of annual average mineral fiber concentrations at various air sampling sites provides the best index of non-occupational inhalation exposure to fibers in a community located near an industrial source of airborne amphibole fibers. The transmission electron microscope analysis of enough individual high volume air samples to provide annual average fiber concentrations is not feasible because of the great time and expense required. X-ray diffraction analysis of air samples collected on membrane filters over periods of several days offers a reliable measurement of amphibole mineral mass concentration. An excellent linear correlation (r = 0.94 for N = 12) exists between the amphibole mass concentrations (x-ray diffraction) and amphibole fiber concentrations (transmission electron microscope). The correlation equation is used to calculate amphibole fiber concentrations from over 300 x-ray diffraction analyses. The accuracy and precision of both techniques are discussed as well ...
The accurate measurement of annual average mineral fiber concentrations at various air sampling sites provides the best index of non-occupational inhalation exposure to fibers in a community located near an industrial source of airborne amphibole fibers. The transmission electron microscope analysis of enough individual high volume air samples to provide annual average fiber concentrations is not feasible because of the great time and expense required. X-ray diffraction analysis of air samples collected on membrane filters over periods of several days offers a reliable measurement of amphibole mineral mass concentration. An excellent linear correlation (r = 0.94 for N = 12) exists between the amphibole mass concentrations (x-ray diffraction) and amphibole fiber concentrations (transmission electron microscope). The correlation equation is used to calculate amphibole fiber concentrations from over 300 x-ray diffraction analyses. The accuracy and precision of both techniques are discussed as well ...
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Asbestos is a naturally occurring rock forming mineral silicate in fibrous form belonging to the serpentine and amphibole groups. It occurs naturally in large deposits on every continent in the world. There are six types of naturally occurring asbestos fibres of which only three have been used commercially in Australia. These included the serpentine: Chrysotile (white asbestos); and the amphiboles: Crocidolite (blue asbestos) and Amosite (brown or grey asbestos). The other three non-commercially used amphiboles included Tremolite, Actinolite and Anthophyllite.. Asbestos has been used in the ancient world of the Egyptians, Greeks and Romans. It is believed that as early as 4000 BC, asbestos fibres were used for wicks in lamps and candles. Between 2000-3000 BC, embalmed bodies of Egyptian pharaohs were wrapped in asbestos cloth. The Greeks and Romans documented the harmful effects of asbestos fibres on those who mined the silken material from ancient stone quarries noting a sickness of the lungs ...
The U.S. Environmental Protection Agency has released early results on research being done in Libby, Montana to monitor the air quality and make progress towards cleaning up a town that has dealt with an increased risk of deadly asbestos exposure for decades now. The data, which was presented during a meeting at the Libby Memorial Center, was described as a preliminary draft estimate. The final draft of the information will be used to determine how dangerous the air is in Libby after decades of Amphibole asbestos mining and attempts to decrease the risk of asbestos exposure in the future. For more than a decade, EPA has worked in this community to clean up the pollution left behind by 40 plus years of mining operations. Under this administration, EPA has stepped up its commitment to provide the best science to finish the job of protecting the health and future of the people of Libby, said Jim Martin, the EPAs Regional Administrator in Denver. Once we finalize these toxicity estimates, they ...
Cincinnati, OH - Workers exposed to low levels of an asbestos-like mineral from Montana more than two decades ago are at an increased risk for lung disease today, according to research from the University of Cincinnati (UC).. Vermiculite is a mineral with a flaky, fluffy-looking structure. Previous studies revealed that the vermiculite ore mined in Libby, Mont., contained increased levels of an asbestos-like mineral fiber that can become airborne and inhaled when used in manufacturing.. In a 25-year follow-up study of workers at a plant which stopped using Libby vermiculite in 1980, current chest X-rays revealed that 20 percent of workers who experienced low cumulative exposure to these fibers had changes in the lining around their lungs. In the group with the highest exposure, changes on chest X-rays were noted in 54 percent of workers.. James Lockey, MD, senior research investigator, says the study indicates that this particular asbestos-like mineral contained in the Libby vermiculite ore can ...
Asbestos is a naturally occurring rock forming mineral silicate in fibrous form belonging to the serpentine and amphibole groups. It occurs naturally in large deposits on every continent in the world. There are six types of naturally occurring asbestos fibres of which only three have been used commercially in Australia. These included the serpentine: Chrysotile (white asbestos); and the amphiboles: Crocidolite (blue asbestos) and Amosite (brown or grey asbestos). The other three non-commercially used amphiboles included Tremolite, Actinolite and Anthophyllite.. Asbestos has been used in the ancient world of the Egyptians, Greeks and Romans. It is believed that as early as 4000 BC, asbestos fibres were used for wicks in lamps and candles. Between 2000-3000 BC, embalmed bodies of Egyptian pharaohs were wrapped in asbestos cloth. The Greeks and Romans documented the harmful effects of asbestos fibres on those who mined the silken material from ancient stone quarries noting a sickness of the lungs ...
Case opinion for US 3rd Circuit IN RE: ASBESTOS PRODUCTS LIABILITY LITIGATION (No. VI). Read the Courts full decision on FindLaw.
A study is to be performed into the effects that vermiculite mining has had on the health of residents and their offspring in the town of Libby in Montana. This is where the W R Grace vermiculite mine was located, and the town has a high rate of asbestos cancer.. An announcement was made by researches from the Mount Sinai School of Medicine who confirmed that they would be carrying out a study into the effects of vermiculite mining on the health of those that have been living in Libby. The study will be a three phase one.. ...
Amphibole (Angel Phantom) Quartz is a quartz that contains inclusions of minerals in varied amounts and proportions, including Riebeckite, Actinolite, Tremolite, Richterite and Lithium. These show as opaque inclusions in layers or cloudy deposits, in a range of colours including white, yellow-gold, red, orange and plum. Even though not all minerals might be visible within the specimen the energies of the crystals will resonate in much the same way, the influence of the minerals becoming an integral part of their makeup.As the name suggests, many find this crystal useful in accessing and working with the Angelic Realms, although its clarity and colouring may affect the effectiveness of this. I have found that the energies of this crystal to be quite complex, and thus perhaps I feel that it aids connection with Higher intelligences that have more complex information to convey, or with those Angelics who wish to work with us on complex issues that mean a bit of hard work on our part! Not then for fluffy
2017 Elsevier B.V.Primary ore-forming minerals retain geochemical signatures of magmatic crystallization information and can reveal the petrochemical conditions prevalent at the time of their formation. The Baogutu deposit is a typical reduced porphyry Cu deposit. Amphibole and biotite Fe3+/SFe ratios, minerals (feldspar, biotite, amphibole, zircon and apatite), in situ elemental and apatite Nd isotopic compositions were determined by Mössbauer spectroscopy, electron probe microanalysis, and laser ablation multiple-collection inductively coupled plasma mass spectrometry, respectively, to investigate the magma oxidation state, petrogenesis, source features, and to constrain the carbon species at magmatic stages for the intrusive phases. The results show that the primary plagioclase and amphibole in the mineralized diorite to granodiorite porphyry and post ore hornblende diorite porphyry are distinct (An26-55 versus An60-69; Mg-hornblende versus tschermakite). In particular, the amphibole shows ...
RATIONALE: Studying samples of body fluid and blood from patients who have been exposed to asbestos or vermiculite in the laboratory may help doctors learn more about changes that may occur in DNA and identify biomarkers related to cancer.. PURPOSE: This laboratory study is looking for biomarkers to detect mesothelioma early in patients exposed to asbestos or vermiculite. ...
Asbestos in Construction What is Asbestos? Asbestos is the name given to a group of naturally occurring minerals. Asbestos differs from other minerals, in that it forms long thin fibers instead of crystals. There are six different minerals, divided into two groups, included in the asbestos family. The two groups are Serpentine and Amphibole, and are based on the differences of their crystalline structure. Serpentine forms a sheet or layered structure. Amphiboles form a chain-like structure. Asbestos fibers are naturally occurring and stay airborne very well. Where do you find asbestos? Asbestos is used in many products because of their high tensile strength, flexibility,.... ...
Many people wonder if they are, or have been, subject to the risks of asbestos exposure. Health hazards from asbestos dust have been recognized in workers exposed in shipyards, power generating stations, oil refineries, steel mills, paper mills, foundries, asbestos mining and milling, manufacturing of asbestos textiles and other asbestos products, insulation work in the construction and building trades, auto mechanics, and a variety of other trades. Demolition workers, drywallers, plumbers, electricians, carpenters, sprinkler fitters, ironworkers, and firefighters also may be exposed to asbestos dust. People whose work brings them into contact with asbestos workers who renovate buildings with asbestos in them, for example may inhale fibers that are in the air: this is called occupational exposure. Workers families may inhale asbestos fibers released by clothes that have been in contact with ACM: this is called paraoccupational exposure. People who live or work near asbestos-related operations ...
In a controversial article, The Great Asbestos Hysteria (Mail, February 23), we said that according to the Health and Safety Executive, the risks from white asbestos products are insignificant, and arguably zero in the case of lung cancer. The HSE assessments related to specific levels of exposure to white asbestos fibres, not white asbestos products, and found a risk from higher levels. The article said that asbestos in UK schools is almost all white. According to the HSE, the more harmful brown asbestos was also frequently used in schools. The writer was in error in saying that the HSE had been forced to withdraw a series of commercials claiming that mesothelioma kills 4,500 a year. In fact, the advertisements were based on an estimate of 4,000 deaths from all asbestos-related disease.
There are six main types of asbestos, broken into two separate categories. These two categories are:. Serpentine: meaning snake like or curly in appearance. Amphibole: characterized by straighter fibers. The serpentine group has only one member - chrysotile, which accounts for over 90% of all asbestos in world production. This asbestos is white or green in color and is often used as insulation or for fireproofing products. With its widespread usage, chrysotile is responsible for most asbestos-related health problems.. The amphibole group contains the other five types of asbestos. Of these, amosite and crocidolite are the only two used for commercial purposes. These two are characterized by strong, stiff fibers and are consider highly dangerous when these airborne fibers are inhaled or ingested.. Amosite, brown-asbestos, had been banned in many countries for decades but it was still being commercially produced up until this last decade. At one time, it accounted for 5% of the asbestos used in ...
Our sweet daughter, Libby, passed away from sudden and aggressive bile duct and liver cancer. From the moment she came into our lives as a 2 month old puppy until her last day at 6 years old and 7 months, Libby knew only unconditional love; she joined her parents, Julia & Casey, everywhere throughout her happy life - even moving via cross-Atlantic oceanliner from New York to London, where she spent her last two years making friends (especially with the kind barista at our neighborhood cafe who always let Libby come in to get her special croissants!), playing in the lush green grass, snoozing on the couch with her parents, chasing her favorite brown ball, and getting all of the love, cuddles, and treats she rightly deserved. We miss her sweet snorts and huge happy smile everyday - Libby is forever loved. RIP Libby Lou, August 10, 2012 - March 22, 2019. ...
opens as PDF 1.4 MB). Favourite quote? Asbestos cement used in India is free from all health hazards. AK Saraf, Chairman of the Asbestos Cement Products Manufacturers Association, India. CSR recommendation: Companies must adopt global policies for avoiding the use of new asbestos products and carefully manage in-place asbestos products in existing infrastructure. Update: Please see a letter in response to this posting below the fold from Ban Asbestos Network of India (BANI) - the organisation that published the book. His letter is well worth reading and offers a powerful condemnation of the quote by AK Saraf above. This is with reference to a piece Killing the Future: Asbestos use in Asia on your website published on 8th August, 2007.. BANI objected to the statement of A K Saraf of Asbestos Cement Products Manufacturers Association quoted in the piece is highly misleading. In India the asbestos industry has mastered the art of misinformation campaign. The statement is an expression of the ...
In 2011, Libby, Montana residents were considering a $43 million asbestos settlement with W.R. Grace & Company, which operated vermiculite mines in town.
Occurrence in Wales: Blake (1888) provided the first description of glaucophane from the British Isles, reporting its occurrence in rocks of his ‘Monian System’ [now known as the Aethwy Terrane or Blueschist Belt (Gibbons & Horák, 1990)] from near Llanfairpwllgwyngyll, Anglesey. Blake’s identification was confirmed by Greenly (1919) who also noted zoning in the amphiboles with green ‘hornblende’ core passing outwards into blue rims. Holgate (1951) provided a chemical analysis on separated rims, but suggested that as the blue amphibole contained a higher Fe3+ to Aliv content, it was crossite and not glaucophane. Macpherson (1983) recalculated Holgate’s analysis and, applying the new IMA amphibole classification, deemed them to be magnesio-arfvedsonites. New microprobe data (Horák & Gibbons, 1986; Gibbons & Gyopari, 1986) showed that the rims fall within the glaucophane-ferroglaucophane series. The Anglesey blueschists occur as poorly-exposed scattered ...
Asbestos, yarn, rope, cloth, tape, lagging rope, graphite gland packaging, bake liner, pife impregnated, pure ptfe pkg., mill board sheet Asbestos, yarn, rope, cloth, tape, lagging rope, graphite gland packaging, bake liner, pife impregnated, pure ptfe pk. ...
C551 / C551M-07(2019) Standard Specification for Asbestos-Cement Fiberboard Insulating Panels insulating panels~ asbestos-cement panels~
By the fire regulation substation entrance and internal doors must be fire rated. Asbestos was widely used in the internal construction or backing of fire doors due to its excellent fire resistance properties. That includes switchroom fire doors (wooden clad) in the form of core insulation, transformer room entrance doors (steel clad) in the form of mastic insulation, interior entrance and connecting fire doors (wooden clad) in the form of core insulation. They are usually painted gray or some other suitable colour to blend with the surroundings. ...
Asbestos is not one but a group of minerals which all occur naturally as thin fibres. It is this small size however that means they can cause various problems as they can float in the air and be easily breathed in to cause problems in the lungs. The different minerals however of course are slightly different in their appearance and in their effect. Amphibole is made of straight fibres that are much like needles. Amphiboles however are a category themselves and include: actinolite, anthophylite, amosite, crocidolite and termolite. The most commonly found asbestos in commercial products that most people suffer from is chrysotile. Health Problems. Asbestos causes a number of health problems and this is as a result of its being breahted into the lungs. Of the health complications that asbestos can cause, the most common are: asbestosis, mesothelioma and lung cancer. Absestosis is caused by the physical presence of asbestos in the lungs which causes scarring and fibrosis. Mesothelioma meanwhile is a ...
Prior to the late 1970s, the health hazards of asbestos exposure were a closely guarded secret by the large corporate and business interests involved in the manufacture and sales of asbestos products. Evidence of the connection between asbestos exposure and respiratory disease existed as far back as 1897; by 1931, the use of asbestos was tightly regulated in the U.K.. No such regulations existed in the U.S., however. Although scientific studies (many commissioned by asbestos and insurance corporations themselves) clearly showed that asbestos was the cause of respiratory disease, the industry itself engaged in a conspiracy of silence. Even the U.S. government was complicit, although government agencies did in fact issue safety guidelines in 1943. These guidelines did not have the force of law, however, and were rarely enforced ...
Be safe when exposed to vermiculite. The source of over 70 percent of all vermiculite sold in the United States from 1919 to 1990 is from a mine near Libby, Montana. There is a large deposit of asbestos in the vermiculite there. The MAJORITY of vermiculite insulation used in the United States under the brand […]. ...
In the YouTube video above, Mrs. Edith Hernandez talks about her husband and his mesothelioma treatment. Like many other mesothelioma patients, he was exposed to asbestos products. He was in the army and handled asbestos products and equipment. The symptoms of his mesothelioma did not appear till many years after the conclusion of World War…
The cause of the disease is linked to the exposure to asbestos, and shipbuilding throughout the world featured hundreds of asbestos products used for insulation, including those vessels used in the British Armed Forces. The material was considered ideal for use aboard ships until the 1980s. Asbestos could be found in the engine and boiler rooms, as well as in the walls, floors and ceilings of rooms such as the sleeping quarters and the galley. Both shipbuilders and those who served on military vessels could have inhaled airborne asbestos fibres while working on the ships ...
Its a fair complaint, on its face. I get plenty of those press releases from environmental groups and read those same news stories, and the only consistent reporting Ive seen about Libby over the last few years has been from New West.net. But the question is whether thats because the media or activists or environmental groups care less about people than, say, polar bears, or wolves, or reforming an archaic mining law that stacks the deck in favor of the W.R. Graces of the world to exploit communities along with the natural resources theyre after. I think there are a number of factors at play here to account for the relative quiet about Libby, and few of them have to do with a lack of horror at what has happened to the people of Libby. And probably none of them made that jury in Missoula acquit Grace and the former executives of the company. The tunnel vision of interest groups is legendary. No matter the issue area, these groups find a niche, and stick in it, often working at odds with ...
Asbestos is well recognized as a health hazard and is highly regulated. An estimated 1.3 million employees in the construction and general industry face significant asbestos exposure on the job. Heaviest exposures occur in the construction industry, particularly during the removal of asbestos during renovation or demolition. Employees are also likely to be exposed during the manufacture of asbestos products (such as textiles, friction products, insulation, and other building materials) and during automotive brake and clutch repair work.. OSHA and the Environmental Protection Agency (EPA) asbestos rules are intertwined.. For further information concerning this topic, please refer to this OSHA website.. Training for this topic may be found at ESAMS or Navy Knowledge Online.. ...
Asbestos is well recognized as a health hazard and is highly regulated. An estimated 1.3 million employees in the construction and general industry face significant asbestos exposure on the job. Heaviest exposures occur in the construction industry, particularly during the removal of asbestos during renovation or demolition. Employees are also likely to be exposed during the manufacture of asbestos products (such as textiles, friction products, insulation, and other building materials) and during automotive brake and clutch repair work.. OSHA and the Environmental Protection Agency (EPA) asbestos rules are intertwined.. For further information concerning this topic, please refer to this OSHA website.. Training for this topic may be found at ESAMS or Navy Knowledge Online.. ...
The asbestos found in vermiculite materials from the former zonolite mine in Libby is fairly unique. Asbestos is known to cause health effects at low levels of exposure.
Libby has been accused of being an intelligence agent for Israels Mossad. That sounds about right. I believe the technical term is Sayanim, although Libby, due to his background and position, may be a step or two above a sleeper agent (see also here, and from a dodgy source with good info, here; btw, have you noticed that the traditional dodgy sources are finding more acceptance in the mainstream, due to the fact that they are the pioneers in certain areas of truth?). There has long been speculation that the Mossad has a hidden spy-chief in the upper reaches of the American government. Libby is the most spectacular example of the phenomenon of so-called dual loyalties (so-called as his only real loyalty is to Israel), and the commutation of his political sentence is part of the education process for the greater American public about this important problem ...
Objectives Cancer risk has been estimated for asbestos production workers or other heavily exposed asbestos workers in numerous studies. The bulk of the asbestos epidemic results come, however, from past intermittent exposures during asbestos product use. This study concentrated on estimating the risk of cancer in such a population.. Methods Altogether 23 285 men and 930 women invited to a nationwide screening campaign for benign asbestos-related diseases in 1990-1992 were followed for cancer through the Finnish Cancer Register up to 1998. Standardized incidence ratios (SIR) were calculated in comparison with the total Finnish population.. Results Altogether 1392 cases of cancer were found among the men. The risk was slightly, but significantly elevated for lung cancer [SIR 1.14, 95% confidence interval (95% CI) 1.01-1.26), mesothelioma (SIR 2.77, 95% CI 1.66-4.31), and prostate cancer (SIR 1.21, 95% CI 1.09-1.34). The risk of lung cancer was slightly higher among the invited nonparticipants ...
Asbestos Minerals for Sale, Amphibole and Serpentine, Chrysotile, Actinolite, Amosite, Grunerite, Tremolite, Riebeckite and more! Asbestos Art Paper and the Philadephia Academy of Science Asebstos Collection.
frontend_meta_description_object_show_Sculpted nephrite fibula decorated with a dragon and a quilong. China, modern Height : 3 cm (1.2 in.) - Length : 15,5 cm (6.1 in.)
frontend_meta_description_object_show_White celadon-like nephrite fibula sculpted with flowers and leaves. Hook designed as dragon head. China, 20th Century Length: 11,5 cm (4-1/2 in.)
West African jade semiprecious stone beads are a deep green color and nephrite jade in a variety of shapes and sizes and are for sale online in the natural gemstone section at the Harlequin Beads and Jewelry bead store. Choose from round, oval and more st West African Jade
This specification covers requirements relating to asbestos-cement nonpressure sewer pipes, joints, and fittings suitable for use with gravity flow, intended ...
One of the six recognized types of asbestos. Approximately 40,200 tons of tremolite asbestos is mined annually in India. It is ... Tremolite is a member of the amphibole group of silicate minerals with composition: Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2. ... The fibrous form of tremolite is one of the six recognised types of asbestos. This material is toxic, and inhaling the fibers ... "Asbestos: Foe or Friend?". Indmedica Cyber Lectures. Indmedica. Retrieved 2 January 2012. CS1 maint: discouraged parameter ( ...
There are two types of fibers: amphibole (thin and straight) and serpentine (curly). All forms of asbestos fibers are ... "Asbestos". CDC. October 9, 2013. Retrieved 13 November 2015.. *^ Smith, Dorsett D. (2015). The Health Effects of Asbestos: An ... "Asbestos Exposure". National Cancer Institute, USA. 2017-06-15.. *. "Environmental Health Guidance Note - Asbestos" (PDF). ... The first lawsuits against asbestos manufacturers occurred in 1929. Since then, many lawsuits have been filed against asbestos ...
However, asbestos are known carcinogens, and cause various other illnesses, such as asbestosis; amphibole asbestos ( ... Several amphibole mineral species can have an asbestiform crystal habit. These asbestos minerals form long, thin, flexible, and ... as it is less dangerous in terms of health than the amphibole asbestos. Inosilicates consist of tetrahedra repeatedly bonded in ... Finally, the amphiboles are usually hydrated, that is, they have a hydroxyl group ([OH]−), although it can be replaced by a ...
In Finland anthophyllite asbestos was mined in two mines, the larger one Paakkila in the Tuusniemi commune started in 1918 and ... Anthophyllite is an amphibole mineral: ☐Mg2Mg5Si8O22(OH)2 (☐ is for a vacancy, a point defect in the crystal structure), ... It was mined in Finland and also in Matsubase, Japan where a large-scale open-cast asbestos mine and mill was in operation ... Some forms of anthophyllite are lamellar or fibrous and are classed as asbestos. The name is derived from the Latin word ...
There are some exceptions, for example NA 2212 is all asbestos with UN 2212 limited to Asbestos, amphibole amosite, tremolite, ...
... can refer to either of two different silicate minerals: nephrite (a silicate of calcium and magnesium in the amphibole ... the silky fibrous mineral form is one form of asbestos). The higher the iron content, the greener the colour. Tremolite occurs ... Nephrite consists of a microcrystalline interlocking fibrous matrix of the calcium, magnesium-iron rich amphibole mineral ...
In amphiboles, (of which asbestos is an example) two chains are linked together by sharing of a third corner on alternate ...
... asbestos fibres have been identified in the lung. Amphibole fibres have usually predominated, but in a few cases mainly or only ... Chrysotile or white asbestos is the most commonly encountered form of asbestos, accounting for approximately 95% of the ... These state that "Asbestos exposure is associated with parenchymal asbestosis, asbestos-related pleural abnormalities, ... In September 2012, governments in Quebec and Canada ended official support for Canada's last asbestos mine in Asbestos, Quebec ...
... is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite or actinolite (aggregates of which ... also make up one form of asbestos). The chemical formula for nephrite is Ca2(Mg, Fe)5Si8O22(OH)2. It is one of two different ...
Other asbestiform minerals include riebeckite, an amphibole whose fibrous form is known as crocidolite or "blue asbestos", and ... "More Information on Asbestos Removal". Total Asbestos Removal Brisbane. 2019-07-21. Retrieved 2019-07-24. v t e. ... Chrysotile Committee on Asbestos: Selected Health Effects, 2006, Asbestos: Selected Cancers, National Academies Press, ISBN 978 ... The most common asbestiform mineral is chrysotile, commonly called "white asbestos", a magnesium phyllosilicate part of the ...
Asbestos is the only naturally occurring long mineral fiber. Six minerals have been classified as "asbestos" including ... chrysotile of the serpentine class and those belonging to the amphibole class: amosite, crocidolite, tremolite, anthophyllite ... Mineral fibers can be particularly strong because they are formed with a low number of surface defects, asbestos is a common ...
Nomenclature of amphiboles: Additions and revisions to the International Mineralogical Association's amphibole nomenclature. ... Created by distinct events, exsolution during cooling suggests its structure can be in asbestos form. This is a hydrous mineral ... separating it from the calcic-sodic amphiboles. It is related to anthophyllite amphibole and gedrite through coupled ... Ferrogedrite is an amphibole mineral with the complex chemical formula of ☐Fe2+2(Fe2+3Al2)(Si6Al2)O22(OH)2. It is sodium and ...
Portions of El Dorado County are known to contain natural asbestos formations near the surface. The USGS studied amphiboles in ... The study found that many amphibole particles in the area meet the counting rule criteria used by the EPA for chemical and ... The executive summary pointed out that even particles that do not meet requirements for commercial-grade-asbestos may be a ... naturally occurring asbestos information El Dorado County Weather El Dorado County Visitors Authority Sierra Community Access ...
Amphibole group[edit]. Amphiboles including amosite (brown asbestos) and crocidolite (blue asbestos) were formerly used in many ... History of Asbestos, Asbestos.com, retrieved 2016-04-07. *^ a b "Asbestos in the home booklet. Wrekin housing trust" (PDF). ... brown asbestos, white asbestos, and green asbestos.[3]. Asbestos mining existed more than 4,000 years ago, but large-scale ... Other regulated asbestos minerals, such as tremolite asbestos, CAS No. 77536-68-6, Ca2Mg5Si8O22(OH)2; actinolite asbestos, CAS ...
Amedeo Avogadro Americium Amethyst amide amine amino acid Ammonia ammonium Ammonium nitrate Ammonium perchlorate Amphibole ... aromatic amine aromatic compound Arrhenius equation arsenic Arthur Harden Artturi Ilmari Virtanen Arfvedsonite Asbestos ...
... carcinogenic airborne asbestos-like amphibole fibers from the blasting, crushing, transport, and processing of grunerite rock ( ...
... amphibole, asbestos and magnetite crystals Petrov nad Desnou - staurolite crystals Maršíkov - beryl, chrysoberyl, columbite, ...
... loose-fill amphibole asbestos (in most cases brown amosite, though instances of blue crocidolite have been recorded) as an ... for residents caught up in loose-fill asbestos scandal Mr Fluffy: Full list of asbestos-contaminated homes in Canberra released ... Jansen started using asbestos as an insulation as early as 1967, and began using it in loose form in 1968, prompting a ... Loose Fill Asbestos has also been found in locations far removed from Canberra, such as three confirmed locations in Lithgow, ...
... sometimes named Libby Amphibole asbestos (LA). Removal actions began in 2000, and in 2002 the site was moved to the EPA's ... "LIBBY ASBESTOS SITE Site Profile". cumulis.epa.gov. Retrieved December 12, 2020. "Tribal Territories in Montana - Indian ... "US transfers care for towns polluted with asbestos to state". Washington Post. ISSN 0190-8286. Retrieved December 13, 2020. " ... Troy suffered from the area's contamination from nearby vermiculite mines contaminated with particularly fragile asbestos, ...
Court for the District of Minnesota case that determined the Reserve Mining Company was responsible for amphibole asbestos ... Eventually, Lord allowed the EPA to issue an asbestos warning to the public. The asbestos issue defined the trial when it ... Selikoff argued that the lake contained asbestos-like fibers. He also said he thought a thorough study should be done on the ... The public, already alarmed by reports of asbestos deaths around the country, was fixated on the trial. It was also covered in ...
Lead and other heavy metal exposure resulting from dust and other particulates Asbestos exposure such as amphibole asbestos ...
2 Sodium amphibole group Glaucophane - Na2Mg3Al2Si8O22(OH)2 Riebeckite (asbestos) - Na2FeII3FeIII2Si8O22(OH)2 Arfvedsonite - ... Amphibole group Anthophyllite - (Mg,Fe)7Si8O22(OH)2 Cummingtonite series Cummingtonite - Fe2Mg5Si8O22(OH)2 Grunerite - ...
Asbestos (fibrous serpentine- or amphibole minerals) Auerlite (variety of thorite) Avalite (chromian variety of illite) ... series of amphiboles) Howlite Hsianghualite Hubeite Hübnerite Huemulite Humite Huntite Hureaulite Hutchinsonite Huttonite ... amphibole group) Fornacite Forsterite (olivine group) Fougèrite (layered double hydroxide) Fourmarierite Fraipontite ... green mineral either jadeite or nephrite amphibole) Jasper (variety of quartz) Jeffersonite (variety of augite) Kaatialaite ...
... asbestos MeSH D01.578.725.050.050 - asbestos, amphibole MeSH D01.578.725.050.050.050 - asbestos, amosite MeSH D01.578.725.050. ... asbestos MeSH D01.837.725.700.760.070.050 - asbestos, amphibole MeSH D01.837.725.700.760.070.050.060 - asbestos, amosite MeSH ... asbestos, amosite MeSH D01.524.500.050 - asbestos, serpentine MeSH D01.524.500.850 - talc MeSH D01.552.020.042 - actinium MeSH ... asbestos, amosite MeSH D01.837.725.700.760.535.400 - asbestos, serpentine MeSH D01.837.725.700.760.535.800 - talc MeSH D01.857. ...
California are known to contain natural amphibole asbestos formations at the surface. The USGS studied amphiboles in rock and ... Asbestos-related diseases have been diagnosed in asbestos workers' family members, and in residents who live close to asbestos ... Asbestos is widely used in roofing materials, mainly corrugated asbestos cement roof sheets and asbestos shingles sometimes ... According to OSHA, "there is no 'safe' level of asbestos exposure for any type of asbestos fiber. Asbestos exposures as short ...
Thus, he argues that asbestos, passive smoking and BSE have not been shown to be dangerous. His articles on global warming have ... The risk differential between chrysotile and the two amphibole fibres for lung cancer is thus between 1:10 and 1:50. Walker, ... Booker repeatedly claimed that white asbestos is "chemically identical to talcum powder" and poses a "non-existent" risk to ... Hodgson JT, Darnton A (December 2000). "The quantitative risks of mesothelioma and lung cancer in relation to asbestos exposure ...
"Libby Asbestos". United States Environmental Protection Agency. Verhovek, Sam Howe (2006-10-11). "Firm Must Pay Asbestos Costs ... both fibrous amphiboles)-in fact, it was formed underground through essentially the same geologic processes as the contaminants ... Pure vermiculite does not contain asbestos and is non-toxic. Impure vermiculite may contain, apart from asbestos, also minor ... Although not all vermiculite contains asbestos, some products were made with vermiculite that contained asbestos until the ...
Amphibole asbestos is banned from trade and use. Vietnam is one of the top 10 asbestos users in the world, with an annual ... Chrysotile asbestos Asbestos fibers Asbestos Blue asbestos (crocidolite), the ruler is 1 cm Blue asbestos, teased to show the ... asbestos) AIB - Asbestos insulating board (AIB) Asbestine Asbestos abatement Asbestos Disease Awareness Organization Medical ... Amphiboles including amosite (brown asbestos) and crocidolite (blue asbestos) were formerly used in many products until the ...
... riebeckite is known as crocidolite or blue asbestos. These are generally called amphibole asbestos. Mining, manufacture and ... Four of the amphibole minerals are among the minerals commonly called asbestos. These are: anthophyllite, riebeckite, ... Amphiboles are minerals of either igneous or metamorphic origin. Amphiboles are more common in intermediate to felsic igneous ... US Geological Survey, Asbestos, accessed 20 July 2015. Nesse 2000, p. 242. "Health Effects of Asbestos". Agency for Toxic ...
Riebeckite (asbestos) - Na2FeII3FeIII2Si8O22(OH)2 ... amphibole group. Phyllosilicates. sheets. [Si2nO5n]2n−. micas ... Sodium amphibole group *Glaucophane - Na2Mg3Al2Si8O22(OH)2 ... Amphibole group *Anthophyllite - (Mg,Fe)7Si8O22(OH)2 ...
However, asbestos are known carcinogens, and cause various other illnesses, such as asbestosis; amphibole asbestos ( ... Several amphibole mineral species can have an asbestiform crystal habit. These asbestos minerals form long, thin, flexible, and ... as it is less dangerous in terms of health than the amphibole asbestos.[107] ... Finally, the amphiboles are usually hydrated, that is, they have a hydroxyl group ([OH]−), although it can be replaced by a ...
Asbestos is the only naturally occurring long mineral fiber. Six minerals have been classified as "asbestos" including ... chrysotile of the serpentine class and those belonging to the amphibole class: amosite, crocidolite, tremolite, anthophyllite ... Mineral fibers can be particularly strong because they are formed with a low number of surface defects, asbestos is a common ...
Blue asbestos was also used in early gas masks. In the mid-20th century, asbestos was confirmed to be harmful, leading to the ... Riebeckite is a sodium-rich member of the amphibole group of silicate minerals, chemical formula Na2(Fe2+3Fe3+2)Si8O22(OH)2. It ... In 1964 Dr Christopher Wagner discovered an association between blue asbestos and mesothelioma. Crocidolite asbestos was mined ... The fibrous forms of riebeckite are known as crocidolite and are one of the six recognised types of asbestos. Often referred to ...
... and plants containing them Arsenic and inorganic arsenic compounds1 Asbestos Azathioprine Benzene Benzidine, and dyes ... and in combination with cisplatin and bleomycin Fluoro-edenite fibrous amphibole Formaldehyde Gallium arsenide Helicobacter ...
Riebeckite (asbestos) - Na2FeII3FeIII2Si8O22(OH)2 ... Sodium amphibole group *Glaucophane - Na2Mg3Al2Si8O22(OH)2 ... Amphibole group *Anthophyllite - (Mg,Fe)7Si8O22(OH)2 ...
Asbestos -- Asbestos/Asbestosis -- Asbjxrn Andersen -- Asbury -- Asbury Lake -- Asbury Park -- Asby -- ASC -- ASC Virus -- ... Amphibole -- Amphibolite -- Amphichroum -- Amphictyonis -- Amphimallon -- Amphineura -- Amphion -- Amphipoda -- Amphipolis -- ...
The Tremolite Asbestos Registry contains people who lived in or worked in Libby, Montana, while vermiculite was mined there; ... Estimated Effects of Occupational Exposure to Libby Amphibole". Journal of Occupational and Environmental Medicine. 52 (5): 555 ... The purpose of the registry was to monitor the long-term health effects of people in Libby exposed to tremolite asbestos and to ... Registry data was used to conduct the first study of the relationship between asbestos exposure and respiratory problems in ...
Amosite is a rare asbestiform variety of grunerite that was mined as asbestos only in the eastern part of the Transvaal ... Manganese also substitutes for (Fe,Mg) within cummingtonite amphibole, replacing B site atoms. These minerals are found in high ... The origin of the name is Amosa, the acronym for the mining company "Asbestos Mines of South Africa". Cummingtonite is commonly ... Cummingtonite (/ˈkʌmɪŋtəˌnaɪt/ KUM-ing-tə-nyte) is a metamorphic amphibole with the chemical composition (Mg,Fe2+ ) 2(Mg,Fe2+ ...
The mountains were named for the asbestos which was mined in the 20th century and is found as a variety of amphibole called ... which is the source of chrysotile asbestos. List of mountain ranges of South Africa Mining industry of South Africa Asbestos ... The Asbestos Mountains is a range of hills in the Northern Cape province of South Africa, stretching south-southwest from ... Substitutes for asbestos now include ceramic, carbon, metallic and Aramid fibers, such as Twaron or Kevlar. David Goldblatt ...
Because these conditions can be triggered by industrial asbestos, which was used in taconite mining and processing, as well as ... The tailings contained 40% of the amphibole group mineral series cummingtonite-grunerite, which may form asbestiform particles ... Hilding and others, "Biological effects of ingested amosite asbestos, taconite tailings, diatomaceous earth and Lake Superior ... District Court judge Miles Lord ruled that the drinking water and Lake Superior must be protected from the asbestos-like ...
... and plants containing them Arsenic and inorganic arsenic compounds Asbestos Azathioprine Benzene Benzidine, and dyes ... and in combination with cisplatin and bleomycin Fluoro-edenite fibrous amphibole Formaldehyde Gallium arsenide Lindane ...
These chlorite schists are cross-cut in places by asbestos veins and coated by chalcedony or quartz. For the Merlis ... and felt-like aggregates of colourless amphiboles (tremolite), talc, anthophyllite and pargasite occur. In foliated ...
... is an amphibole silicate mineral with the chemical formula Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2. The name actinolite ... Actinolite asbestos was once mined along Jones Creek at Gundagai, Australia. Some forms of actinolite are used as gemstones. ... Fibrous actinolite is one of the six recognised types of asbestos, the fibres being so small that they can enter the lungs and ... Like tremolite, asbestiform actinolite is regulated as asbestos. Actinolite is commonly found in metamorphic rocks, such as ...
The frequent co-location of talc deposits with asbestos may result in contamination of mined talc with white asbestos, which ... Talc dominantly forms from the metamorphism of magnesian minerals such as serpentine, pyroxene, amphibole, and olivine, in the ... There are six varieties of asbestos; the most common variety in manufacturing, white asbestos, is in the serpentine family. ... Talc containing asbestos is classified as a group 1 agent (carcinogenic to humans), talc use in the perineal classified as ...
Some minor copper, silver, tungsten, asbestos, beryl (aquamarine), ruby including a diamond have also been reported within the ... layers of magnetite and metachert and varying amounts of amphibole. The average iron content in the Atlantic City area is about ...
Libby Amphibole asbestos is a complex mixture of amphibole fibers, both mineralogically and morphologically. The mixture ... IRIS Toxicological Review of Libby Amphibole Asbestos (External Review Draft) * IRIS Toxicological Review of Libby Amphibole ... The Libby Amphibole Asbestos assessment was initiated in 2007. It was nominated for assessment by the IRIS Program because it ... IRIS Toxicological Review of Libby Amphibole Asbestos (Final Report). Overview. EPA has finalized the, Toxicological Review of ...
Langer and Nolan suggested that we failed to present the amphibole hypothesis in a developmental perspective. Our objective was ... The scope of the amphibole hypothesis has been confusing to many, scientists and laypeople alike. We ... express several criticisms of our recent review of the amphibole hypothesis. ... Asbestos-dust; Asbestos-fibers; Asbestosis; Occupational-exposure; Occupational-hazards; Exposure-assessment; Workplace-studies ...
Home , Resources , The Synergist , Industry News , EPA: Most Significant Sources of Libby Amphibole Asbestos Have Been Removed ... EPA: Most Significant Sources of Libby Amphibole Asbestos Have Been Removed Published December 10, 2014 ... its cleanups of Libby and Troy-two towns in Montana that had significant and uncontrolled sources of Libby amphibole asbestos ( ... EPAs outdoor air testing for LAA in Libby and Troy indicates that asbestos air concentrations are now equivalent to those ...
... ... Data on size and shape characteristics of airborne amphibole asbestos and amphibole cleavage fragments obtained from air- ...
... chrysotile or white asbestos). Most amphibole asbestos was mined as crocidolite (blue) and amosite (brown) from Precambrian ... Although asbestiform amphiboles only contributed less than 6% of industrial asbestos worldwide, they have proved more toxic as ... Amphibole asbestos in Africa and Australia: geology, health hazard and mining legacy. WES GIBBONS ... Amphibole asbestos in Africa and Australia: geology, health hazard and mining legacy. WES GIBBONS ...
Van Orden, D.R., K. A. Allison and R. J. Lee, "Differentiating Amphibole Asbestos from Non-Asbestos in a Complex Mineral ... construction materials for asbestos content often results in the misidentification of non-asbestos amphi- bole particles as ... These errors have received widespread publicity in the media (such as the asbestos-in-crayons story) and have caused unwar- ... The primary cause of these errors has been a poor understanding of mineralogy and analytical techniques among the many asbestos ...
Asbestos formed predominantly of amphibole-group minerals, anthophyllite, crocidolite, riebeckite, amosite, tremolite, ... Asbestos formed predominantly of amphibole-group minerals, anthophyllite, crocidolite, riebeckite, amosite, tremolite, ...
... a suite of amphibole minerals of varying morphologies to determine if there is a correlation between mineral habit (i.e., ... This paper explores the utility of tEBSD for characterization of asbestiform particles from reference asbestos materials, ... Scanning Electron Microscopy and Transmitted Electron Backscatter Diffraction Examination of Asbestos Standard Reference ... Scanning Electron Microscopy and Transmitted Electron Backscatter Diffraction Examination of Asbestos Standard Reference ...
Amphibole group[edit]. Amphiboles including amosite (brown asbestos) and crocidolite (blue asbestos) were formerly used in many ... History of Asbestos, Asbestos.com, retrieved 2016-04-07. *^ a b "Asbestos in the home booklet. Wrekin housing trust" (PDF). ... brown asbestos, white asbestos, and green asbestos.[3]. Asbestos mining existed more than 4,000 years ago, but large-scale ... Other regulated asbestos minerals, such as tremolite asbestos, CAS No. 77536-68-6, Ca2Mg5Si8O22(OH)2; actinolite asbestos, CAS ...
Blake DJ, Bolin CM, Cox DP, Cardozo-Pelaez F, Pfau JC: Internalization of Libby amphibole asbestos and induction of oxidative ... In vitro determinants of asbestos fiber toxicity: effect on the relative toxicity of Libby amphibole in primary human airway ... Amphibole samples. Libby amphibole (LA) was collected from the Rainy Creek Complex near Libby, Montana in the year 2000 (LA2000 ... All mineral types were included in this analysis such that both amphibole and non-amphibole particles were counted. Complete ...
Results for asbestos equipment from ABC, ABCOV, Air-O-Cell and other leading brands. Compare and contact a supplier serving ... AMOSITE - Amphibole Asbestos. Straight, brittle Amosite fibers, light gray to pale brown (also known as "brown asbestos") are ... asbestos sample equipment , asbestos sampling equipment , asbestos fiber equipment , sample asbestos equipment , asbestos ... asbestos removal equipment , asbestos waste equipment , asbestos particulate equipment , asbestos hazard equipment ...
Precautions Against Libby Amphibole Asbestos Exposure Provided to a Forest Management Agency. Although no overexposures to ... Libby amphibole were found, HHE Program investigators recommended ways to minimize the potential for exposure. They recommended ...
Asbestos has long been praised for its fire and heat resistant fibers, and its subsequent usefulness in construction and other ... Crocidolite, or blue asbestos, is one of the more common types of amphibole asbestos present in buildings, along with amosite ... Comparison of Amphibole and Chrysotile Asbestos. Chrysotile asbestos is believed by some to be the most dangerous form of ... When is Asbestos a Hazard?. Asbestos is believed to only be a significant hazard when it has become airborne. If asbestos is ...
Research Pinpoints Libby Amphibole Disease. * February 26, 2018. Snickers Ad Spoofs Asbestos in Sports Illustrated Swimsuit ... 2018 by Asbestos.com and The Mesothelioma Center. All rights reserved. 1 S. Orange Ave., Suite 301, Orlando, FL 32801 ... Asbestos.com is sponsored by law firms. This website and its content may be deemed attorney advertising. Prior results do not ... Patrick Ma, lead investigator at WVU Cancer Center, told Asbestos.com. "Yes, the expectations for this trial are high." ...
EPA finalises IRIS review on inhalation of Libby amphibole asbestos. Home » EPA finalises IRIS review on inhalation of Libby ... Comments Off on EPA finalises IRIS review on inhalation of Libby amphibole asbestos ... Toxicological review of Libby amphibole asbestos in support of summary information on the Integrated Risk Information System ( ... describing the scientific basis for the human health hazard and dose-response assessments of inhaled Libby amphibole asbestos ( ...
CH9661155Chemical studies of amphibole asbestos. I. Structural changes of heat-treated crocidolite, amosite, and tremolite from ...
tremolite asbestos; USA; pleural thickening; amphibole; vermiculite; radiological changes; long-term exposure; respiratory ... Montana; asbestos; asbestos mining; pulmonary function; pleural diseases. Descriptors (secondary). ... Asbestos-related pleural disease due to tremolite associated with progressive loss of lung function: Serial observations in 123 ... Patients who had occupational and non-occupational exposure to asbestos in Libby were evaluated for progressive loss of ...
... anthophyllite asbestos, tremolite asbestos and actinolite asbestos. These are the only amphibole minerals that have been ... Asbestos includes chrysotile, amosite, crocidolite, tremolite asbestos, anthophyllite asbestos, actinolite asbestos, and any of ... Asbestos includes chrysotile, cummingtonite-grunerite asbestos (amosite), anthophyllite asbestos, tremolite asbestos, ... Asbestos includes chrysotile, crocidolite, amosite (cummingtonite-grunerite asbestos), tremolite asbestos, actinolite asbestos ...
Amphibole group. Five types of asbestos are found in the amphibole group: amosite, crocidolite, anthophyllite, tremolite, and ... Other regulated asbestos minerals, such as tremolite asbestos, CAS No. 77536-68-6, Ca2Mg5Si8O22(OH)2; actinolite asbestos (or ... 12001-28-4 is an amphibole from Africa and Australia. It is the fibrous form of the amphibole riebeckite. Blue asbestos is ... File:Blue asbestos.jpg Blue asbestos (crocidolite) from Wittenoom, Western Australia. The ruler is 1 cm. File:Blue asbestos ( ...
Asbestos fibers are classified by mineral structure as serpentine or amphibole.. Table 1. Types of Asbestos. Serpentine. ... There are two classes of asbestos: serpentine and amphibole.. *Asbestos is now used much less widely in the United States and ... www.epa.gov/asbestos/asbestos-laws-and-regulations#phaseoutexternal icon.. Research showing a clear link between asbestos ... However, asbestos is still in use in some products today and asbestos remains in many older buildings [NIOSH 2011a]. ...
... that occurred among a panel of seven experts surrounding the science of how fiber length relates to toxicity of asbestos and ... Asbestos. D,0.1µm. Mesothelioma. Dodson et al, 1990. Autopsy of lung and pleural tissue from former shipyard workers. Amphibole ... Data from the asbestos literature. Clinical analysis of human pleural tissue. Asbestos. L,2µm;D,0.03µm. Pleural plaques. ... Tremolite asbestos is an amphibole that can cleave resulting in short squatty cleavage fragments depending on crystalline plain ...
Amphibole Asbestos Still Prevalent. The vermiculite and amphibole mix for decades was shipped throughout America for processing ... Flores said Libby amphibole doesnt lead to the same kind of asbestosis as chrysotile - the more commonly used type of asbestos ... U.S. Asbestos Imports Surge in August, Report Finds Canada Announces Asbestos Ban with Exemptions Government Report: EPA Failed ... The disease stems from amphibole asbestos and its needle-shaped fibers. Almost all of it was mined in or near Libby, Montana, ...
... from Greek asbestos, literally… See definitions of asbestos. ... ASBESTOS Meaning: quicklime (which burns when cold water is ... Definitions of asbestos from WordNet. asbestos. (. n.. ). a fibrous amphibole. ; used for making fireproof articles. ; inhaling ... from Latin asbestos quicklime (which burns when cold water is poured on it), from Greek asbestos, literally ... asbestos (n.). 1650s, earlier albeston, abestus (c. 1100), name of a fabulous stone, which, set afire, could not be ...
Libby Amphibole Asbestos *Geology and Human Health * *Internet Resources. *Teaching Materials. *Visualizations ...
The use of asbestos and exposure to it has serious health consequences. Learn more about the history of asbestos and the ... Humans have used asbestos for at least 10,000 years for just about everything. Ranging from cooking pots to insulating ... Amphibole Asbestos. Microscopically, amphibole asbestos fibers appear as hard spiky crystals. There was a little twist and bend ... Home / Asbestos / History of Asbestos. History of Asbestos Use. Asbestos had a long history of production and devastation ...
Asbestos (mineral) Reports of the harmful effects of asbestos fibres on human health caused increasing concern beginning in the ... from the article Amphibole The common crystallographic habit of amphiboles is acicular or prismatic; however, most of the ... Asbestosis, also called white lung, lung disease that is caused by the prolonged inhalation of asbestos fibres. A type of ... Amosite, a variety of the silicate mineral cummingtonite, which is a source of asbestos (see cummingtonite). ...
... but there is no justification for assuming that their presence in an asbestos-exposed population is always related to asbestos ... Egilman D. Asbestos screenings. Amer J Indust Med 2002;42:163.. The following article shows that the film triad method (PA, ... Asbestos: Why we have to defend against screened cases. Mealeys Litigation Report, November 12, 2003;18:1-16. * Bernstein DB. ... Cases of alleged asbestos-related disease: a radiologic re-evaluation. J Occup Med 1990;32:1088-90. *Houser PG: Affadavit in ...
Consumer Product Safety Commission: Asbestos: Risk and Assessment. Environmental Protection Agency: Libby Amphibole Asbestos ... Today, products which contain more than one percent asbestos are considered asbestos-containing materials (ACMs) and are banned ... Vermiculite May Pose Asbestos Hazard. The mineral vermiculite is an extremely effective soil conditioner for moisture retention ... When asbestos exists within a solid construction compound, it poses no true hazard as the fibers cannot be released. It is only ...
Learn more about the serious health risks that drill press operators may have due to asbestos exposure while on the job. ... If youre a drill press operator who developed mesothelioma from asbestos exposure in your workplace, you might be eligible for ... Amphibole: This form of asbestos is far more deadly. A drill press operator exposed to any amount of amphibole asbestos for any ... [email protected]asbestos.net. © 2019 Mesothelioma Justice Network at Asbestos.net - The information provided by www.asbestos.net is not ...
A monoclinic mineral, (Fe,Mg) (sub 7) Si (sub 8) O (sub 22) (OH) (sub 2) ; amphibole group; has Mg/(Mg + Fe (super 2+) ) = 0.30 ... are used as asbestos.. cumulate ...
  • Libby Amphibole asbestos is a complex mixture of amphibole fibers, both mineralogically and morphologically. (epa.gov)
  • 2003). Exposure to Libby Amphibole asbestos results in the same types of adverse health effects as are seen with exposure to other amphibole mineral fibers. (epa.gov)
  • Epidemiologic studies of workers exposed to Libby Amphibole asbestos fibers indicate increased mortality from lung cancer, mesothelioma, asbestosis, and other nonmalignant respiratory diseases (McDonald et al. (epa.gov)
  • Extending the TEM methods designed for the evalua- tion of atmospheres in which any primary mineral fibers present are derived from a commercial asbestos fiber is a challenging task. (rjlg.com)
  • Improper analysis of non- construction materials for asbestos content often results in the misidentification of non-asbestos amphi- bole particles as asbestos fibers. (rjlg.com)
  • Since 1972, when the US Occupational Health and Safety Administration established the first limits on occupational exposure to asbestos fibers, numerous analytical methods employing several microscopy techniques have been developed to identify a group of minerals defined by legislation as asbestos. (rjlg.com)
  • When asbestos is used for its resistance to fire or heat, the fibers are often mixed with cement or woven into fabric or mats. (wikipedia.org)
  • Prolonged inhalation of asbestos fibers can cause serious and fatal illnesses including lung cancer , mesothelioma , and asbestosis (a type of pneumoconiosis ). (wikipedia.org)
  • Fine, silky, flexible white Chrysotile fibers (also known as "white asbestos") make up 80% to 90% of all asbestos contained in buildings in the United States. (environmental-expert.com)
  • Straight, brittle Amosite fibers, light gray to pale brown (also known as "brown asbestos") are most commonly used in thermal system insulation and the second most prevalent type of asbestos found in building materials. (environmental-expert.com)
  • Asbestos is a natural mineral that has long been praised for its fire and heat resistant fibers, and its subsequent usefulness in construction and other industrial efforts. (mesotheliomasymptoms.com)
  • The first is the amphibole form, which consists of thin fibers that come together to form a chain structure. (mesotheliomasymptoms.com)
  • When the fibers are disturbed, asbestos becomes airborne. (mesotheliomasymptoms.com)
  • Friable asbestos" is a term used to describe asbestos fibers which can be converted to dust when pressure is applied to them. (mesotheliomasymptoms.com)
  • Harder fibers which are not subject to pressure are known as "non-friable asbestos. (mesotheliomasymptoms.com)
  • However, these fibers are still able to be converted into "friable asbestos" through the use of grinding machines or sanding, making them a perennial threat. (mesotheliomasymptoms.com)
  • Chrysotile asbestos is believed by some to be the most dangerous form of asbestos, as it has long, thin fibers which scientists believe allows them to remain in the lung tissue better than the shorter fibers of amphibole forms. (mesotheliomasymptoms.com)
  • Although amphibole forms more easily penetrate lung tissue deeply, these fibers are also more easily expelled, the USGS explains. (mesotheliomasymptoms.com)
  • The disease stems from amphibole asbestos and its needle-shaped fibers. (asbestos.com)
  • The inhalation of asbestos fibers can cause serious illnesses, including mesothelioma . (wikidoc.org)
  • Asbestiform amphibole may also occur as soft friable fibers but some varieties such as amosite are commonly straighter. (wikidoc.org)
  • All forms of asbestos are fibrillar in that they are composed of fibers with widths less than 1 micrometre that occur in bundles and have very long lengths. (wikidoc.org)
  • Asbestos fibers are classified by mineral structure as serpentine or amphibole. (cdc.gov)
  • The Agency for Toxic Substances and Disease Registry (ATSDR) is holding a panel discussion to review and discuss health effects associated with asbestos and synthetic (man-made) vitreous fibers (SVFs), especially those of less than 5 microns in length. (cdc.gov)
  • Recent events have highlighted a need to further explore the potential for health effects from exposure to biopersistent fibers, specifically asbestos and some SVFs. (cdc.gov)
  • Significant toxicology and occupational health research has focused on asbestos fibers and SVF greater than five microns in length, however, it seems that much less is known about the potential health effects of smaller fibers. (cdc.gov)
  • ATSDR is convening this panel to gain a greater understanding of asbestos and SVF toxicity, especially as it relates to fibers less than 5 microns in length. (cdc.gov)
  • In asking these questions, ATSDR seeks a discerning review of the fate of inhaled asbestos and vitreous fibers less than 5 microns in length. (cdc.gov)
  • The second day of the meeting will be devoted to critical assessment of the health effects that can be justifiably attributed to asbestos and vitreous fibers and to identifying critical data gaps and research needs that would further enlighten this subject (Topics #2 and #3). (cdc.gov)
  • Its unique chemical properties made asbestos fibers one of the most popular manufacturing additives the world has ever seen. (asbestos.net)
  • Archaeological evidence supports that clay cooking pots in Scandinavia dated 8,000 B.C. contained asbestos fibers. (asbestos.net)
  • Romans weaved asbestos fibers into napkins and tablecloths. (asbestos.net)
  • Mixing asbestos fibers with other materials seemed to improve products in every way. (asbestos.net)
  • There were dire warnings about health risks from long-term exposure to asbestos fibers. (asbestos.net)
  • Physicians and scientists were well aware of what happens when asbestos fibers enter human lungs. (asbestos.net)
  • When asbestos exists within a solid construction compound, it poses no true hazard as the fibers cannot be released. (newsociety.com)
  • Drilling into asbestos-containing materials released harmful fibers into the air where they were continuously inhaled by unsuspecting workers. (asbestos.net)
  • Continually disturbing asbestos materials resulted in a steady release of tiny asbestos fibers into their surrounding work environment. (asbestos.net)
  • Asbestos fibers settled on drill press operators' clothes, tools and personal equipment such as lunch boxes and packs. (asbestos.net)
  • These unsuspecting workers then carried asbestos-contaminated materials home, exposing their families and friends to the hazardous fibers as well. (asbestos.net)
  • Asbestos are crystallized silicate minerals that form fibers with different structures and characteristics. (bioportfolio.com)
  • Asbestos fibers are very durable and can tolerate very high temperatures. (bioportfolio.com)
  • Asbestos is a group of six naturally occurring silicate minerals made up of thin, microscopic fibers. (mesothelioma.com)
  • As a result, talc and vermiculite can become contaminated with asbestos fibers. (mesothelioma.com)
  • This process removes asbestos fibers for use. (mesothelioma.com)
  • Asbestos manufacturers can then incorporate asbestos fibers into a wide range of products. (mesothelioma.com)
  • Amphibole fibers are short, straight, needle-like and stiff. (mesothelioma.com)
  • Asbestos minerals consist of thin, separable fibers that have a parallel arrangement. (cdc.gov)
  • Amphibole asbestos fibers are generally brittle and often have a rod- or needle-like shape, whereas chrysotile asbestos fibers are flexible and curved. (cdc.gov)
  • Asbestos fibers do not have any detectable odor or taste. (cdc.gov)
  • Since asbestos fibers may cause harmful health effects in people who are exposed, all new uses of asbestos have been banned in the United States by the EPA. (cdc.gov)
  • Asbestos fibers do not evaporate into air or dissolve in water. (cdc.gov)
  • However, pieces of fibers can enter the air and water from the weathering of natural deposits and the wearing down of manufactured asbestos products. (cdc.gov)
  • Asbestos fibers are not able to move through soil. (cdc.gov)
  • Asbestos fibers may break into shorter pieces or separate into a larger number of individual fibers as a result of physical processes. (cdc.gov)
  • Today, areas surrounding the abandoned vermiculite processing/ mining facilities and much of the town of Libby are contaminated with these asbestos fibers, contributing to an outbreak of asbestos-related diseases in the Libby population. (cdc.gov)
  • Trees in Libby and in forested areas surrounding the abandoned mine have accumulated amphibole asbestos fibers on their bark surface, providing for inhalational exposures. (cdc.gov)
  • Trees as reservoirs for amphibole fibers in Libby, Montana. (cdc.gov)
  • Gravimetric reduction of a tree core sample did not indicate the presence of amphibole fibers. (cdc.gov)
  • However, transmission electron microscopy analysis of bark samples collected near the vermiculite mine yielded substantial amphibole fiber concentrations ranging from 41 million to 530 million fibers/g of bark. (cdc.gov)
  • A conversion of these mass-based concentrations to areal concentrations (to reflect surface area contamination) revealed concentrations in excess of 100 million amphibole fibers/cm2. (cdc.gov)
  • These preliminary results suggest that trees in the Libby valley and along vermiculite shipping corridors can serve as reservoirs for amphibole fibers, and that a potential for exposure exists for those who harvest contaminated wood. (cdc.gov)
  • Asbestosis is long term inflammation and scarring of the lungs due to asbestos fibers . (wikipedia.org)
  • Asbestosis is caused by breathing in asbestos fibers. (wikipedia.org)
  • [2] All types of asbestos fibers are associated with an increased risk. (wikipedia.org)
  • The cause of asbestosis is the inhalation of microscopic asbestos mineral fibers suspended in the air. (wikipedia.org)
  • Asbestosis is the scarring of lung tissue (beginning around terminal bronchioles and alveolar ducts and extending into the alveolar walls) resulting from the inhalation of asbestos fibers. (wikipedia.org)
  • There are two types of fibers: amphibole (thin and straight) and serpentine (curly). (wikipedia.org)
  • All forms of asbestos fibers are responsible for human disease as they are able to penetrate deeply into the lungs. (wikipedia.org)
  • When such fibers reach the alveoli (air sacs) in the lung, where oxygen is transferred into the blood, the foreign bodies (asbestos fibers) cause the activation of the lungs' local immune system and provoke an inflammatory reaction dominated by lung macrophages that respond to chemotactic factors activated by the fibers. (wikipedia.org)
  • Due to the asbestos fibers' natural resistance to digestion, some macrophages are killed and others release inflammatory chemical signals , attracting further lung macrophages and fibrolastic cells that synthesize fibrous scar tissue, which eventually becomes diffuse and can progress in heavily exposed individuals. (wikipedia.org)
  • Some asbestos fibers become layered by an iron-containing proteinaceous material ( ferruginous body ) in cases of heavy exposure where about 10% of the fibers become coated. (wikipedia.org)
  • Asbestos fibers typically become trapped in the lungs and accumulate over several years, according to WebMD. (reference.com)
  • Judge Hodges disagreed, saying Garlock's gaskets contained relatively harmless chrysotile asbestos contained in polymer and were unlikely to provide enough fibers to cause mesothelioma. (forbes.com)
  • Breathing in asbestos fibers can lead to developing pleural mesothelioma. (pleuralmesothelioma.com)
  • Asbestos fibers may alter immune function in a way that allows mesothelioma cancer cells to develop unchecked by normal immunity. (pleuralmesothelioma.com)
  • The individual asbestos fibers that are released into the air are microscopic. (howstuffworks.com)
  • The ability of asbestos fibers to split into smaller and smaller strands allows asbestos fibers to enter the human body through the lungs and literally slide into and between the cells of soft tissues. (bloggernews.net)
  • There are two basic groups of asbestos fibers. (bloggernews.net)
  • The serpentine group is asbestos which forms somewhat curly fibers which are long and supple. (bloggernews.net)
  • The amphibole group forms fibers which are straighter and stiffer. (bloggernews.net)
  • Differential Counting: The term applied to the practice of excluding certain kinds of fibers from a phase contrast asbestos count because they are not asbestos. (osha.gov)
  • Sealing Encapsulant: This is a product which can be applied, preferably by spraying, onto an asbestos surface which will seal the surface so that fibers cannot be released. (osha.gov)
  • Such projects can disturb the fibers and may cause more harm than leaving undamaged asbestos in place, the study said. (edweek.org)
  • According to the study, the major flaw of the laws designed to control asbestos in schools is their requirement that two different types of asbestos fibers be treated identically. (edweek.org)
  • Amphibole fibers, the authors claim, are more likely to be deadly than chrysotile fibers, which are commonly found in products used in schools and are thought to be less likely to penetrate the lung. (edweek.org)
  • Composed of soft and flexible fibers, asbestos is a natural occurring mineral known for its heat-resistance and its imperviousness to electricity and corrosion, These very properties make asbestos highly useful as an insulator. (egyptflowers.net)
  • In ancient times, Asbestos' long fibers and heat-resistant properties allowed it to be used as wicks for lamps and candles. (egyptflowers.net)
  • The fibers for this type of asbestos are jagged and straight. (egyptflowers.net)
  • The fibers of this type of asbestos, as the name would suggest, are curly and snake-like. (egyptflowers.net)
  • The main reason why asbestos is so dangerous to the health is because the fibers cannot be broken down when they are inhaled into the lungs or become stuck in other tissues. (egyptflowers.net)
  • For centuries, the iron ore industry has been a leading industry in the state, exposing workers to harmful suspended particles such as silica dust and airborne asbestos fibers. (mesotheliomatreatmentcenters.org)
  • Serpentine is a variety of asbestos thats structure is layered with curly fibers. (mesotheliomacenter.org)
  • Amphibole asbestos has long, chain like structures that has sharp fibers and can be inhaled easily. (mesotheliomacenter.org)
  • Its classification as amphibole asbestos means that it is more dangerous because it has sharper fibers that break off easily and subsequently are easier to inhale. (mesotheliomacenter.org)
  • Amosite - Amosite asbestos or "brown" asbestos is typically identified by its brown color and straight fibers. (mesotheliomacenter.org)
  • Anthophyllite - Anthophyllite asbestos is usually brown and yellow in color and its make-up of long sharp fibers places it in the amphibole category of asbestos. (mesotheliomacenter.org)
  • Chrysotile - Chrysotile asbestos is the most common form of asbestos used and it the only kind that is categorized as serpentine asbestos because if its curly fibers. (mesotheliomacenter.org)
  • The curly fibers are not as easy to inhale and because of this, some think that chrysotile is "safer" than other types of asbestos. (mesotheliomacenter.org)
  • Its bluish fibers are the thinnest and finest fibers of all other asbestos types and usually are the sharpest and longest. (mesotheliomacenter.org)
  • In towns like Wittenoom, Australia, almost 18 percent of those who mined the blue asbestos died from asbestos cancer, and its airborne fibers caused Wittenoom to be completely taken off the map. (mesotheliomacenter.org)
  • Tremolite - Tremolite asbestos is also considered one of the most deadly forms of asbestos due to its very sharp, thin, needle-like fibers that can be easily inhaled. (mesotheliomacenter.org)
  • Asbestos is a family of fibrous minerals which are known to cause lung cancer, mesothelioma, and other serious respiratory related illnesses when the fibers are inhaled. (eurekalert.org)
  • In this case, it was a geological confluence of groundwater interacting with rock salt and a cooling magma body deep below earth's surface to form the fibers and create this type of asbestos, said Brenda Buck, a professor of geology at UNLV and co-researcher of the study. (eurekalert.org)
  • This disease occurs when asbestos fibers wear away at the lung and cripple lung function. (sokolovelaw.com)
  • Asbestos fibers can also cause fluid and plaque buildup over time. (sokolovelaw.com)
  • For example, asbestosis may lead to a higher risk of lung cancer, as the asbestos fibers cause more damage over time. (sokolovelaw.com)
  • Asbestosis , or diffuse pulmonary fibrosis, is a non-cancerous lung disease caused by the inhalation of asbestos fibers. (sokolovelaw.com)
  • When asbestos fibers get stuck in the lung, they cause damage and scarring. (sokolovelaw.com)
  • Long-term deterioration from asbestos fibers harden the affected person's lung. (sokolovelaw.com)
  • Asbestos fibers are microscopic, making them impossible to remove. (sokolovelaw.com)
  • Once this happens and the asbestos has been disturbed, asbestos fibers can be found in the air and it may stay there for years. (diamondcertified.org)
  • :284-290 Basically, when an unfortunate person inhales asbestos dust, microscopic mineral fibers become trapped in their lungs and cause inflammation, scarring, and eventually genetic damage to the body's cells. (rationalwiki.org)
  • Artificial snow commonly contained asbestos fibers before the 1980s phase-out happened. (rationalwiki.org)
  • NIOSH explains that Libby amphibole is a complex mixture of amphibole fibers that primarily includes tremolite, winchite, and richterite fibers. (aiha.org)
  • The agency stresses that exposure to Libby amphibole results in the same types of adverse health effects that are seen with exposure to other asbestos fibers, including lung cancer, mesothelioma, and asbestosis. (aiha.org)
  • Agency staff also reviewed the respiratory protection program and collected air samples for asbestos and total fibers. (aiha.org)
  • For asbestos, the OSHA permissible exposure limit, the NIOSH recommended exposure limit, and the ACGIH threshold limit value are 0.1 fibers per cubic centimeter of air. (aiha.org)
  • It is also very likely that the greatest potential for exposure to asbestos fibers would be during the fire line construction and mop-up tasks, as these activities have the greatest direct disruption of soil. (aiha.org)
  • These same tasks were associated with the most asbestos fibers detected in the air samples collected by NIOSH. (aiha.org)
  • Global asbestos consumption has declined significantly since the 1970s, when product manufacturers began using asbestos substitutes, such as aramid fiber, cellulose fiber, polyvinyl alcohol fibers or wollastonite, and alternative products, such as aluminum siding, ductile iron and polyvinyl chloride pipe, fiberglass shingles, metallic disk brake pads and mineral wool insulation. (earthmagazine.org)
  • Lung ailments were common to anyone who worked with asbestos fibers. (environmentalchemistry.com)
  • ATSDR also recommends that EDUHSD perform confirmatory classroom sampling to ensure that classrooms remain free of asbestos fibers. (cdc.gov)
  • The crystal formation of asbestos is in the form of long thin fibers. (nemmar.com)
  • If you nevertheless choose to take the samples yourself, take care not to release asbestos fibers into the air or onto yourself. (nemmar.com)
  • The water/detergent mist will reduce the release of asbestos fibers. (nemmar.com)
  • [13] Chrysotile is more flexible than amphibole types of asbestos, and can be spun and woven into fabric. (wikipedia.org)
  • [1] Chrysotile, along with other types of asbestos, has been banned in dozens of countries and is only allowed in the United States and Europe in very limited circumstances. (wikidoc.org)
  • There are other types of asbestos, like the Chrysotile, that are more commonly found as veins within serpentine rock. (egyptflowers.net)
  • The Asbestos Hazard Emergency Response Act of 1986 though legally identifies 6 types of asbestos which can be classified under two categories: Amphibole and Serpentine. (egyptflowers.net)
  • Exponent has considerable experience in various aspects of asbestos-related research, including expertise in the disciplines needed to evaluate health risks associated with different types of asbestos exposures. (exponent.com)
  • The three most commonly used types of asbestos fibres are chrysotile (95% of all usage), crocidolite and amosite. (ohsrep.org.au)
  • There are six different types of asbestos that occur naturally throughout the world. (mesotheliomacenter.org)
  • As one of the least common types of asbestos that has been found and used, anthophyllite is mostly composed of magnesium and iron. (mesotheliomacenter.org)
  • Chrysotile is more flexible that other types of asbestos and can be woven into fabrics. (mesotheliomacenter.org)
  • Five types of asbestos are found in the amphibole group. (ehso.com)
  • The remaining three types of asbestos in the amphibole group are: a nthophyllite, tremolite, and actinolite . (ehso.com)
  • The GSA presentation will focus on the discovery of types of asbestos that geologists call fibrous iron sodium amphiboles and fibrous actinolite in Clark County, Nevada, and the geological settings that caused the unusual asbestos formation, said Metcalf. (eurekalert.org)
  • however, some issues, including the relative hazards of different types of asbestos and whether there is a safe level of exposure to any of them, remain in scientific dispute. (bmj.com)
  • Both the medical and scientific communities worldwide generally agree that there are no safe types of asbestos and that there is no safe level of exposure to asbestos. (hubpages.com)
  • The three most common types of asbestos are: a) chrysotile b) amosite, and c) crocidolite. (nemmar.com)
  • The division between the two types of asbestos is based upon the crystalline structure. (nemmar.com)
  • Several organizations, such as the International Agency for Research on Cancer (IARC), the Occupational Safety and Health Administration (OSHA) and the National Toxicology Program (NTP), concur that all types of asbestos cause several types of cancer (lung cancer, pleural mesothelioma and peritoneal mesothelioma) ( INSPQ, 222 ). (inspq.qc.ca)
  • First group is only one type: chrysotile asbestos. (environmental-expert.com)
  • The USGS reports that as late as 2003, 4,650 tons of chrysotile asbestos was used in the United States. (mesotheliomasymptoms.com)
  • [4] Tremolite often contaminates chrysotile asbestos, thus creating an additional hazard. (wikidoc.org)
  • Chrysotile asbestos is the only serpentine type. (mesothelioma.com)
  • For information on the safe use of chrysotile asbestos, refer to "Safe Use of Chrysotile: A Manual of Preventive and Control Measures. (astm.org)
  • Serpentine asbestos is sometimes called white asbestos or chrysotile asbestos. (cancer.ca)
  • Chrysotile asbestos is currently the most commonly used form of asbestos in the world. (cancer.ca)
  • Comparison of Calidria chrysotile asbestos to pure tremolite: final results of the inhalation biopersistence and histopathology examination following short-term exposure. (curehunter.com)
  • Among modern forms of asbestos found in consumer or industrial products, chrysotile asbestos is in the serpentine group and tremolite, amosite, crocidolite, actinolite and anthophyllite are in the amphibole group. (bloggernews.net)
  • Chrysotile asbestos is the most commonly seen form, and is usually used for textiles and commercial products. (bloggernews.net)
  • Australian fibro sheeting contained amphibole as well as chrysotile asbestos until the mid 1980s. (mja.com.au)
  • Objective To confirm the association between exposure to chrysotile asbestos and lung cancer risk and to demonstrate the combined effect of smoking and asbestos exposure. (bmj.com)
  • Conclusions These results confirm the strong association between exposure to chrysotile asbestos and lung cancer risk, and support an interactive effect of asbestos exposure and smoking which is more than additive. (bmj.com)
  • This nested case-control study conducted in textile workers suggests a strong association between exposure to chrysotile asbestos and lung cancer risk. (bmj.com)
  • Many countries, including Japan, have banned the production and use of asbestos, whereas some other countries, including China, continue to produce and use huge amounts of chrysotile asbestos in construction materials. (bmj.com)
  • Lung cancer in chrysotile asbestos workers: analyses based on the two-stage clonal expansion model. (cdc.gov)
  • The current state of knowledge leads to the conclusion that chrysotile asbestos is a human carcinogen and as a result, all the preventive and protective measures for the health of workers and the public must be enforced. (inspq.qc.ca)
  • The occupational exposure limit for chrysotile asbestos (1 fibre/ml) currently in force in Québec ( 2 ) is 100 times higher than the one prevailing in the Netherlands and in Switzerland ( 3 ) and it is ten times higher than the one adopted by many western countries and other Canadian provinces ( 4 ). (inspq.qc.ca)
  • Consequently, considering first, that the results of the exposure measurements taken on Québec construction sites show exceedances of the exposure limit for chrysotile asbestos in 43 % of cases ( INSPQ, 1213 ) and second, that the regulations are not always applied, it follows that workers are still at risk of developing asbestos-related diseases. (inspq.qc.ca)
  • Asbestos includes chrysotile, amosite, crocidolite, tremolite asbestos , anthophyllite asbestos , actinolite asbestos , and any of these minerals that has been chemically treated and/or altered. (cornell.edu)
  • The name amphibole (Ancient Greek ἀμφίβολος - amphíbolos literally meaning 'double entendre', implying ambiguousness) was used by René Just Haüy to include tremolite, actinolite and hornblende. (wikipedia.org)
  • Asbestos is the name given to a group of six different fibrous minerals (amosite, chrysotile, crocidolite, and the fibrous varieties of tremolite, actinolite, and anthophyllite) that occur naturally in the environment. (cdc.gov)
  • Minerals important in asbestos analysis include cummingtonite-grunerite, crocidolite, tremolite-actinolite and anthophyllite. (osha.gov)
  • Asbestos includes chrysotile, cummingtonite-grunerite asbestos (amosite), anthophyllite asbestos, tremolite asbestos, crocidolite, actinolite asbestos and any of these minerals which have been chemically treated or altered. (osha.gov)
  • Amphiboles however are a category themselves and include: actinolite, anthophylite, amosite, crocidolite and termolite. (healthguidance.org)
  • Actinolite - Actinolite is classified under amphibole asbestos. (mesotheliomacenter.org)
  • Its chemical composition makes it a common mineral found in rocks and soil, but actinolite asbestos has not been used as much in asbestos containing products. (mesotheliomacenter.org)
  • Many regulations have been created to protect people from exposure to mined and refined asbestos, like fibrous actinolite, which the scientists discovered. (eurekalert.org)
  • The other types all belong to the amphibole group of minerals and include the fibrous forms of anthophyllite , amosite (grunerite), crocidolite (riebeckite), tremolite, and actinolite . (britannica.com)
  • Some common varieties are tremolite , actinolite , asbestus , edenite , hornblende (the last name being also used as a general term for the whole species). (everything2.com)
  • Relatively small amounts of tremolite and actinolite have been mined and used as asbestos. (earthmagazine.org)
  • The name amphibole ( Greek αμφιβολος/amfibolos , meaning "ambiguous") was used by René Just Haüy to include tremolite, actinolite, and hornblende. (newworldencyclopedia.org)
  • Anthophyllite and tremolite asbestos account for less than one percent of the production and consumption, seeing rare commercial use. (mesotheliomasymptoms.com)
  • citation needed] Asbestos use dates back at least 4,500 years, when the inhabitants of the Lake Juojärvi region in East Finland strengthened earthenware pots and cooking utensils with the asbestos mineral anthophyllite (see Asbestos-ceramic). (wikipedia.org)
  • Ca(2)(Mg,Fe)(5)Si(8)O(22)(OH)(2) Anthophyllite asbestos. (osha.gov)
  • Chrysotile has been the most commonly used form of asbestos, followed by crocidolite, amosite and anthophyllite. (earthmagazine.org)
  • The U.S. Geological Survey (USGS ) explains that there are over 65 additional forms of chemically-distinct amphibole forms of asbestos that are not used commercially as asbestos. (mesotheliomasymptoms.com)
  • Its greater availability and more widely distributed natural deposits also led to its more common use than other forms of asbestos. (mesotheliomasymptoms.com)
  • All forms of asbestos are hazardous, and all can cause cancer, but amphibole forms of asbestos are considered to be somewhat more hazardous to health than chrysotile. (cdc.gov)
  • Banning all forms of asbestos won't end the problem of asbestos-related diseases. (medworm.com)
  • All forms of asbestos are linked to an increased risk of developing lung cancer and mesothelioma, but amphibole may require less exposure before causing health problems. (reference.com)
  • The same lawyers who denied his exposure to deadlier forms of asbestos had seven months earlier filed with a trust claiming that very exposure. (forbes.com)
  • Crocidolite was not as heat resistant as other forms of asbestos, so it was not as desirable. (mesotheliomacenter.org)
  • 3, 4 Others dismiss such views and demand an international ban on all forms of asbestos. (bmj.com)
  • Crocidolite is one of the several forms of asbestos. (artfire.com)
  • The name of chrysotile, one of the most common forms of asbestos, is derived from the Greek words "chrysos" (gold) and "tilos" (fiber) or "gold fiber. (environmentalchemistry.com)
  • Some forms of asbestos look like old wood, and merchants claimed that their resistance to fire was proof that these "wooden crosses" came from cross on which Christ was hung. (environmentalchemistry.com)
  • Blue and brown asbestos not only can induce asbestosis at lower concentrations than white asbestos, but they are highly carcinogenic. (lyellcollection.org)
  • Flores said Libby amphibole doesn't lead to the same kind of asbestosis as chrysotile - the more commonly used type of asbestos . (asbestos.com)
  • Asbestosis, also called white lung, lung disease that is caused by the prolonged inhalation of asbestos fibres. (britannica.com)
  • Inhalation of dust containing asbestos results in a process of interstitial pulmonary fibrosis called asbestosis. (bioportfolio.com)
  • Inhalation of asbestos fibres can lead to various serious lung conditions, including asbestosis and cancer. (wikipedia.org)
  • The signs and symptoms of asbestosis typically manifest after a significant amount of time has passed following asbestos exposure, often several decades under current conditions in the US. (wikipedia.org)
  • Asbestosis and lung cancer cases associated with asbestos commonly develop at least 15 years after the exposure, and cases of mesothelioma often occur 30 years later. (reference.com)
  • The question of whether lung cancer can be attributed to asbestos exposure in the absence of asbestosis remains controversial. (bmj.com)
  • The aim of this paper is to review the evidence in the important scientific and medicolegal controversy as to whether or not lung cancer can be attributed to asbestos exposure without radiographic evidence of asbestosis. (bmj.com)
  • Studies that examined exposure-response relationships between lung cancer and asbestos exposure without considering asbestosis were not included. (bmj.com)
  • The amphibole minerals amosite and crocidolite were subjected to calcination and to hydrothermal treatment in order to study the effect of these heat treatments on the ability of the minerals to trigger formation of free radicals, which is known to be a main factor causing asbestosis and other asbestos-induced diseases. (biomedsearch.com)
  • Of the health complications that asbestos can cause, the most common are: asbestosis, mesothelioma and lung cancer. (healthguidance.org)
  • Years of continued asbestos exposure is incredibly harmful, and can cause incurable conditions such as asbestosis and mesothelioma cancer. (mesotheliomatreatmentcenters.org)
  • Outside of cancers, asbestos can cause serious issues like asbestosis and pleural effusions. (sokolovelaw.com)
  • In the lung parenchyma the needle-like asbestos fibres illicit a chronic low level inflammatory reaction with neutrophils and macrophages releasing compounds that damage lung parenchyma and eventually lead to asbestosis 2 . (radiopaedia.org)
  • A Brief History of Asbestos Use and Associated Health Risks: First in a series of articles on asbestos: Its history, chemical and physical properties, uses, health hazards and the legal implications of asbestosis & mesothelioma. (environmentalchemistry.com)
  • At that time the evidence against asbestos as a health hazard (it was found to cause asbestosis and mesothelioma) could no longer be denied, and its use fell into sudden decline. (environmentalchemistry.com)
  • In 1928 Cook identified the effects of asbestos in the lungs as asbestosis . (environmentalchemistry.com)
  • In one study asbestosis was detected in 10% of asbestos workers who had been employed in the industry for 10-19 years, in 73% of workers who had been employees 20-29 years and in 92% of workers who had been employed for more than 40 years. (environmentalchemistry.com)
  • According to the WHO it is estimated that 107,000 people die annually from asbestos related diseases such as mesothelioma, asbestosis and asbestos-related lung cancer. (hubpages.com)
  • Inhaling asbestos can cause asbestosis, a fibrosis of the lungs, as well as lung cancer and malignant mesothelioma. (geotimes.org)
  • This paper explores the utility of tEBSD for characterization of asbestiform particles from reference asbestos materials, a suite of amphibole minerals of varying morphologies to determine if there is a correlation between mineral habit (i.e., crystal form), microscopic particle shape preferred orientation, and mineral specimens from an industrial talc deposit to provide a case study of the utility and limitations of the technique. (rjlg.com)
  • Asbestos is the generic name given to a commercially and legally defined group of six naturally occurring fibrous silicate minerals that have been widely used in commercial products. (cdc.gov)
  • Many of these minerals are not included in the legal definition of asbestos and are not regulated. (cdc.gov)
  • Asbestos is a group of fibrous silicate minerals. (cdc.gov)
  • Amphibole ( /ˈæmfɪboʊl/) is a group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. (wikipedia.org)
  • Amphiboles are minerals of either igneous or metamorphic origin. (wikipedia.org)
  • Four of the amphibole minerals are among the minerals commonly called asbestos. (wikipedia.org)
  • The first two are blue fibrous minerals, with glaucophane occurring in blueschists and crocidolite (blue asbestos) in ironstone formations, both resulting from dynamo-metamorphic processes. (wikipedia.org)
  • One of these, namely chrysotile, belongs to the serpentine family of minerals, while all of the others belong to the amphibole family. (cdc.gov)
  • However, because they are not fibrous, they are not classified as asbestos minerals. (cdc.gov)
  • Asbestos is the name for a group of naturally occurring fibrous minerals that have been widely used because they're durable and resist high heat. (cancer.ca)
  • any of the fibrous amphibole and serpentine minerals, esp chrysotile and tremolite, that are incombustible and resistant to chemicals. (dictionary.com)
  • There has been considerable discussion in the literature related to the use of standard optical properties of commercial asbestos minerals for the classification of amphibole minerals found in raw materials as either asbestiform or as non-asbestos (1-4). (mcri.org)
  • Four of the deposits are chrysotile and two from amphibole minerals. (mesothelioma.com)
  • Amphibole: A family of minerals whose crystals are formed by long, thin units which have two thin ribbons of double chain silicate with a brucite ribbon in between. (osha.gov)
  • Asbestos: A term for naturally occurring fibrous minerals. (osha.gov)
  • Minerals important in asbestos analysis included in this family are chrysotile, lizardite, antigorite. (osha.gov)
  • Asbestos has many industrial uses despite some health risks and is made from different minerals, all with a fibrous habit. (galleries.com)
  • IAN PLIMER: Whereas asbestos minerals are amphibole minerals. (abc.net.au)
  • Asbestos is not one but a group of minerals which all occur naturally as thin fibres. (healthguidance.org)
  • Asbestos is a naturally occurring group of minerals that can only be identified under a microscope. (ehso.com)
  • Asbestos minerals are divided into two groups -- serpentine and amphibole. (ehso.com)
  • The distinction between groups is based upon its crystalline structure -- serpentine minerals have a sheet or layered structure, amphiboles have a chain-like crystal structure. (ehso.com)
  • Boulder, CO, USA -- Naturally occurring asbestos minerals may be more widespread than previously thought, with newly discovered sources now identified within the Las Vegas metropolitan area. (eurekalert.org)
  • This is the first discovery of asbestos in this kind of geological setting and it suggests the minerals could occur in other similar settings around the globe, said Buck, who has a background in medical geology. (eurekalert.org)
  • Asbestos is the generic term for a number of naturally occurring fibrous minerals. (bmj.com)
  • Asbestos , any of several minerals that readily separate into long, flexible fibres. (britannica.com)
  • Chrysotile fibre usually has a whitish colour, but fibres of the amphibole minerals may be pale green, yellow, or blue. (britannica.com)
  • Asbestos is a set of six naturally occurring silicate minerals from mixture of calcium magnesium, iron, and sodium exploited commercially for their desirable physical properties, particularly their resistance to heat and burning. (radiopaedia.org)
  • Asbestos is a generic name given to six needle-shaped minerals that have been used in commercial products. (earthmagazine.org)
  • Chrysotile is a serpentine group mineral and the other five are amphibole group minerals. (earthmagazine.org)
  • For more information on asbestos and other mineral resources, [visit minerals.usgs.gov/minerals](http://visit minerals.usgs.gov/minerals). (earthmagazine.org)
  • Asbestos (the name originating from a Greek word meaning "inextinguishable) is the commercial name given to a set of six natural silicate minerals. (hubpages.com)
  • The inherent characteristics of the long thin fibrous crystals found in these minerals caused asbestos fibre to gain popularity in various industries at the turn of the 19th century. (hubpages.com)
  • There are two distinct groups of minerals that can crystallize as asbestos fibre namely serpentine and amphibole. (hubpages.com)
  • Amphibole defines an important group of generally dark-colored, rock-forming silicate minerals . (newworldencyclopedia.org)
  • Hornblende is the most common subgroup of minerals in amphibole. (newworldencyclopedia.org)
  • Asbestos is the name given to a number of naturally occurring fibrous silicate minerals that have been mined for their useful properties, such as thermal insulation, chemical and thermal stability, and high tensile strength. (nemmar.com)
  • Asbestos differs from other minerals in its crystal development. (nemmar.com)
  • The assessment is focused on a specific type of asbestos found as a consequence of the mining and processing of vermiculite in Libby, Montana. (epa.gov)
  • EPA has also estimated the amount of LAA that a person can breathe every day for a lifetime that is likely to not result in adverse non-cancer health effects-the first such estimate regarding non-cancer effects for any type of asbestos. (aiha.org)
  • The name for this type of asbestos is chrysotile and the USGS explains about 96 percent of worldwide asbestos production and consumption between 1900 and 2003 is made up of this form. (mesotheliomasymptoms.com)
  • [2] This type of asbestos, like all asbestos, is hazardous. (wikidoc.org)
  • Blue asbestos is commonly thought of as the most dangerous type of asbestos (see above and below). (wikidoc.org)
  • Health complications usually depend on the type of asbestos exposure, the American Cancer Society notes. (reference.com)
  • Educators are reacting cautiously to a new study that suggests that the health hazards posed by the type of asbestos most common in school buildings have been greatly overstated. (edweek.org)
  • Chrysotile is the only type of asbestos in the serpentine category, while the remaining five types belong in the amphibole category. (mesotheliomacenter.org)
  • Because if its use in many insulation products, the EPA classified amosite as the second most used type of asbestos in the United States. (mesotheliomacenter.org)
  • Since this type of asbestos was rarer, it wasn't used commercially. (mesotheliomacenter.org)
  • Tremolite is the type of asbestos that can be found in vermiculite, which is a type of magnesium aluminum silicate material that expands when heated and used in a construction and agriculture. (mesotheliomacenter.org)
  • Chrysotile, the only mineral in the serpentine group, is the most commonly used type of asbestos and accounts for approximately 95% of the asbestos found in buildings in the United States. (ehso.com)
  • The most popular type of asbestos that is mined for its commercial value is Chrysotile (white asbestos) which is found in serpentine rock and mined extensively in Canada. (hubpages.com)
  • As the only member of the serpentine group, Chrysotile (A, B) is the most common type of asbestos found in buildings. (nemmar.com)
  • As an acronym for the Asbestos Mines of South Africa, Amosite is the second most prevalent type of asbestos found in building materials. (nemmar.com)
  • Although asbestiform amphiboles only contributed less than 6% of industrial asbestos worldwide, they have proved more toxic as mineral pathogens than the more commonly mined asbestiform serpentine (chrysotile or white asbestos). (lyellcollection.org)
  • [2] They are commonly known by their colors, as blue asbestos , brown asbestos , white asbestos , and green asbestos . (wikipedia.org)
  • The main variants are chrysotile, or white asbestos, and amphibole. (reference.com)
  • Asbestos is a generic term for a number of different fibrous silicates, which vary in their potency for causing malignancy and include amphiboles (crocidolite or blue asbestos) and amosite (brown asbestos), and serpentine forms such as chrysotile (white asbestos). (mja.com.au)
  • Professor Plimer also argues that white asbestos, known as chrysotile, is not really asbestos, and three years ago he even asserted that it was not a carcinogen. (abc.net.au)
  • Chrysotile - Also known as white asbestos , this type of used for thousands of different kinds of products in the past. (egyptflowers.net)
  • Chrysotile is commonly known as 'white asbestos' or named for its natural color. (ehso.com)
  • Chrysotile, also known as "white asbestos" and a member of the Serpentine mineral group is the most common. (nemmar.com)
  • Blue asbestos (crocidolite). (wikipedia.org)
  • Crocidolite, or blue asbestos, is one of the more common types of amphibole asbestos present in buildings, along with amosite asbestos, which is also known as brown asbestos. (mesotheliomasymptoms.com)
  • riebeckite is known as crocidolite or blue asbestos. (wikipedia.org)
  • Crocidolite - Crocidolite or "blue asbestos" is part of the amphibole family. (mesotheliomacenter.org)
  • Crocidolite , 'blue asbestos' is also an amphibole. (ehso.com)
  • Amosite (brown asbestos) and Crocidolite (blue asbestos) are amphiboles and the largest deposits were found in South Africa and Australia. (hubpages.com)
  • Next, there is Crocidolite or "blue asbestos," which is an asbestos found in specialized high temperature applications. (nemmar.com)
  • EPA has finalized the, Toxicological Review of Libby Amphibole Asbestos: in support of the Integrated Risk Information System (IRIS) . (epa.gov)
  • The final health assessment of the toxicity of Libby amphibole asbestos was prepared by staff in both EPA's Region 8 Office and Office of Research and Development's National Center for Environmental Assessments (NCEA). (epa.gov)
  • The Libby Amphibole Asbestos assessment was initiated in 2007. (epa.gov)
  • An assessment for Libby Amphibole Asbestos is not currently on IRIS. (epa.gov)
  • EPA hosted an interagency science consultation on the draft IRIS Toxicological Review of Libby Amphibole Asbestos. (epa.gov)
  • EPA released the draft IRIS Toxicological Review of Libby Amphibole Asbestos for public review and comment, and announced the public listening session. (epa.gov)
  • EPA posted the final Toxicological Review of Libby Amphibole Asbestos to the IRIS database. (epa.gov)
  • EPA has announced that its cleanups of Libby and Troy-two towns in Montana that had significant and uncontrolled sources of Libby amphibole asbestos (LAA) due to the mining and processing of contaminated vermiculite-have been effective in reducing cancer and non-cancer risks in both towns. (aiha.org)
  • The composition of Libby amphibole (LA) is complex and minimal toxicity data are available. (biomedcentral.com)
  • A finalised review has been issued by the EPA describing the scientific basis for the human health hazard and dose-response assessments of inhaled Libby amphibole asbestos (LAA) in connection with IRIS (the Integrated Risk Information System database, available via http://www.epa.gov/iris/index.html ). (bibra-information.co.uk)
  • A research team led by thoracic surgeon Dr. Raja Flores has identified Libby amphibole asbestos disease for the first time as the puzzling killer that continues to threaten innocent victims exposed to one variety of asbestos. (asbestos.com)
  • It's the first study to really describe the syndrome of Libby amphibole disease," Flores said. (asbestos.com)
  • Researchers found 87 percent of the miners exposed to Libby amphibole had pleural abnormalities and 68 percent had specific LPT. (asbestos.com)
  • Places endemic with Libby amphibole need to know what to look for. (asbestos.com)
  • We need to identify areas filled with Libby amphibole and try and prevent further contamination because this is a relentless, progressive killer. (asbestos.com)
  • Libby Amphibole Disease: Pulmonary Function and CT Abnormalities in Vermiculite Miners. (asbestos.com)
  • EPA finalizes Libby Amphibole Asbestos health assessment (Mont. (epa.gov)
  • To address exposures to the public, Libby amphibole (LA) was measured in personal breathing zone and Tyvek surface wipe samples collected during firewood harvesting simulations, as well as in the ash and emissions of woodstoves when amphibole-contaminated firewood was combusted. (cdc.gov)
  • Libby amphibole" associated with vermiculite ore near Libby, Montana, was also excluded. (exponent.com)
  • Amphibole asbestos is often called blue or brown asbestos. (cancer.ca)
  • Amosite is also known as "brown asbestos. (nemmar.com)
  • Asbestos is a mineral which is made up of minute fibres measuring less than 3 microns long by 1 micron thick. (environmental-expert.com)
  • Asbestos is naturally occurring mineral fibres with specific physical and chemical qualities. (environmental-expert.com)
  • Reports of the harmful effects of asbestos fibres on human health caused increasing concern beginning in the 1970s, however. (britannica.com)
  • Amphibole is made of straight fibres that are much like needles. (healthguidance.org)
  • More alarming, the friends and family of these groups may also be at higher risk due to the tiny asbestos fibres getting caught in their clothes and hair and being brought home with them after work. (healthguidance.org)
  • The two major classes of asbestos fibres are called serpentine and amphibole (see diagram above). (ohsrep.org.au)
  • This means that in Australia industry is recycling and returning (selling) asbestos fibres back into the community as a small proportion (unintended but known) of fill such as in various grades of gravel. (ohsrep.org.au)
  • Shorter fibres are used in such products as paper, millboard, and asbestos-cement building materials. (britannica.com)
  • Asbestos' brittle, smooth-surfaced fibres are difficult to spin, tending to slip past each other unless blended with a rough-surfaced fibre, such as cotton , which typically makes up 10-25 percent of the blend. (britannica.com)
  • A regional variation in fibre concentration in different tissue samples was found, and the size distribution of naked fibres and asbestos bodies was determined. (bmj.com)
  • By energy dispersive x-ray microanalysis the fibres were identified mainly as amphibole asbestos. (bmj.com)
  • Employees in many different industries other than the asbestos mining industry were exposed to asbestos fibres. (hubpages.com)
  • Taking into consideration that in the United States alone 10,000 people die each year as a direct result of exposure to the deadly asbestos fibres it is unconceivable why a country would continue the use or mining of this product. (hubpages.com)
  • The best advice to anyone who has been, is, or may in the future be, exposed to asbestos fibres, particularly if the exposure is for a prolonged period of time, is to educate oneself with regards to the prevention of asbestos exposure. (hubpages.com)
  • The level of friability determines the amount of asbestos fibres that can be released into the atmosphere and cause health problems when people inhale these fibres. (hubpages.com)
  • Early awareness of asbestos-related diseases in producer countries did not translate into preventative action before hundreds of thousands of individuals had been exposed to high fibre levels. (lyellcollection.org)
  • Despite the severity of asbestos-related diseases, the material has extremely widespread use in many areas. (wikipedia.org)
  • Because of these common asbestos uses, the most common victims of related diseases are mechanics, construction workers, and those who have worked in shipyards . (mesotheliomasymptoms.com)
  • Diagnostic signals are unusual when compared to more common asbestos-related diseases , making it difficult to identify early by traditional means. (asbestos.com)
  • Some experts believe the increase in asbestos-related diseases among women and younger adults in Southern Nevada may be traced to those sites . (asbestos.com)
  • Research showing a clear link between asbestos exposure and various serious diseases has resulted in increased regulation of asbestos and high burdens of corporate liability due to cessation of asbestos mining in the United States in 2002 and the dramatic decline in commercial use of imported asbestos in the United States since the late 1970s. (cdc.gov)
  • Today, many drill press operators and other exposed workers suffer life-threatening diseases caused by asbestos exposure . (asbestos.net)
  • Despite this, and in part because the consequences of exposure can take decades to arise, at least 100,000 people are thought to die each year from diseases related to asbestos exposure. (wikipedia.org)
  • Despite the severity of asbestos-related diseases, the material has been widely used all over the world, and most buildings constructed before the 1980s are thought to contain asbestos. (wikipedia.org)
  • The severity of asbestos-related diseases, the material's extremely widespread use in many areas of life, its continuing long term use after harmful health effects were known or suspected, and fact that asbestos-related diseases can emerge decades after exposure ceases, have resulted in asbestos litigation becoming the longest, most expensive mass tort in U.S. history and a significant legal issue in many other countries. (netlibrary.net)
  • Fifteen years after its much-celebrated ban of the toxic mineral, Australia has just reached its peak of asbestos-related diseases such as malignant mesothelioma cancer. (medworm.com)
  • This type of heavy exposure is more likely to lead to asbestos-related diseases such as pleural mesothelioma. (pleuralmesothelioma.com)
  • When exposure exceeds this background environmental level, however - as is often the case for workers exposed to asbestos in their job environments - the progression of asbestos-related diseases such as asbestos cancer and mesothelioma is generally rapid and deadly. (bloggernews.net)
  • The tragic consequence of this use of asbestos has been a terrible toll of asbestos-related diseases, with the worst being malignant mesothelioma . (bloggernews.net)
  • Exposure to asbestos products , and development of diseases like mesothelioma, has occurred for millions of workers in industries such as boilermaking, pipefitting, construction, shipyard trades, and many, many others. (bloggernews.net)
  • Fibrous and asbestiform amphiboles intergrown with vermiculite ore are suspected to be a causative factor in an abnormally high number of cases of respiratory diseases in former mine and mill workers, and in. (usgs.gov)
  • A sbestos inhalation is established beyond doubt as the cause of the fatal cancer malignant mesothelioma (MM). Recently, there has been an epidemic of asbestos-related diseases in several westernised nations, resulting from past occupational exposure. (mja.com.au)
  • 10 Australia has the highest per-capita rate of asbestos diseases in the world, and rates of MM continue to climb. (mja.com.au)
  • Asbestos has been used in the manufacture of more than 300 common building products used in schools, and has been linked with lung cancer and other respiratory diseases. (edweek.org)
  • 30 billion available RIGHT NOW for victims of all asbestos-related diseases. (mesotheliomatreatmentcenters.org)
  • If you worked in these facilities, you should have regular health examinations to determine if you are developing any asbestos-related diseases. (mesotheliomatreatmentcenters.org)
  • Additionally, because its use is the most wide-spread, more people suffer from asbestos related diseases from contact with chrysotile than any other form of asbestos. (mesotheliomacenter.org)
  • There are several non-cancerous pleural diseases that are caused by long-term damage from the carcinogen asbestos. (sokolovelaw.com)
  • There are a few other asbestos-related diseases that are less common. (sokolovelaw.com)
  • At this time, there is no proven link between pleural plaque and more serious asbestos-related lung diseases. (sokolovelaw.com)
  • It is the amphiboles that are responsible for the majority of asbestos related diseases 2 . (radiopaedia.org)
  • :294 and various other diseases, See the Wikipedia article on Asbestos-related diseases . (rationalwiki.org)
  • Other goals include becoming a united voice for all asbestos victims and educating the public as well as the medical community on asbestos related diseases. (hubpages.com)
  • Since 2003, the Institut national de santé publique du Québec (INSPQ - Québec's public health institute) has produced some fifteen publications describing asbestos exposure and asbestos-related diseases in Québec's general population and its workers. (inspq.qc.ca)
  • Certain asbestos material suppliers were fully aware of the severe dangers of long-term, unprotected asbestos exposure to innocent workers like the average drill press operator. (asbestos.net)
  • The study demonstrates a progressive loss of pulmonary function in patients exposed to tremolite asbestos. (ilo.org)
  • Tremolite asbestos occurs in some of the Precambrian metamorphic rocks of the Llano region. (tshaonline.org)
  • Serpentine and tremolite asbestos are considered the better varieties due to their greater flexibility and tensile strength, but cummingtonite asbestos has its uses and is being mined for this reason in South Africa. (galleries.com)
  • Its chemical compound is mostly magnesium and is similar to tremolite asbestos. (mesotheliomacenter.org)
  • The vermiculite that was contaminated with tremolite asbestos caused hundreds of deaths in the town of Libby, Montana - a town specifically known for its vermiculite mines. (mesotheliomacenter.org)
  • Asbestos can also cause benign pleural effusions, pleural plaques and diffuse pleural thickening. (bioportfolio.com)
  • Asbestos can also trigger progressive changes, such as thickened lung membranes, known as pleural plaques, or abnormal fluid buildup around the lungs, known as pleural effusions. (reference.com)
  • Asbestos exposure is the main cause of malignant pleural mesothelioma. (pleuralmesothelioma.com)
  • Still, even among asbestos-exposed people, pleural mesothelioma is rare. (pleuralmesothelioma.com)
  • Pleural mesothelioma develops after a person inhales asbestos. (pleuralmesothelioma.com)
  • Researchers believe several factors contribute to how asbestos triggers pleural cells to become cancerous. (pleuralmesothelioma.com)
  • More than 80 percent of pleural mesothelioma cases are directly caused by asbestos. (pleuralmesothelioma.com)
  • The key takeaway: Cancer experts and occupational health scientists agree asbestos exposure is the main cause of pleural mesothelioma. (pleuralmesothelioma.com)
  • Patients with pleural mesothelioma have reported several sources of asbestos exposure, but the majority of exposures have occurred at industrial job sites. (pleuralmesothelioma.com)
  • Cases of pleural mesothelioma after secondhand asbestos exposure show that even a small level of asbestos exposure can cause disease, if it occurs over a long period of time. (pleuralmesothelioma.com)
  • Pleural malignant mesothelioma is in many cases associated with exposure to asbestos, and sarcomatous MM is strongly associated with a history of exposure, most often occupational. (springer.com)
  • According to the British Thoracic Society, pleural plaque is the most common disease associated with asbestos exposure. (sokolovelaw.com)
  • This mechanism likely also applies to other similarly-shaped, biologically-inert substances such as nanotubes and nanowires that meet the same length threshold for pleural retention of 5 µm as asbestos does. (rationalwiki.org)
  • An epidemiological and environmental study was carried out in Shubra El-Kheima city, greater Cairo, of the exposure-response relationship between asbestos and malignant pleural mesothelioma. (who.int)
  • Malignant pleural mesothelioma (MPM) is associated with environmental and occupational exposure to asbestos [1]. (who.int)
  • For example, in 1973 the EPA banned the use of spray-on building insulation and fireproofing containing more than 1 percent asbestos under authority of the Clean Air Act [EPA 2013] https://www.epa.gov/asbestos/asbestos-laws-and-regulations#phaseout external icon . (cdc.gov)
  • It's a process that kills people before cancer does, before lung cancer or mesothelioma," Flores told Asbestos.com. (asbestos.com)
  • Lung cancer is most common but asbestos is also a risk factor for cancers of other organs. (bioportfolio.com)
  • Smokers exposed to asbestos may decrease their risk of developing lung cancer in the future if they abstain from smoking. (reference.com)
  • A joint effect of asbestos exposure and smoking on lung cancer risk was analysed using a conditional logistical model. (bmj.com)
  • Diagnosed with Mesothelioma or Lung Cancer from Asbestos? (mesotheliomatreatmentcenters.org)
  • Mesothelioma is an extremely aggressive variant of lung cancer, and an estimated 80% of cases are caused by asbestos exposure. (rationalwiki.org)
  • Evaluation of alternative exposure metrics for assessing mortality risk from lung cancer and mesothelioma among an occupational cohort exposed to amphibole asbestos from vermiculite mining operations in Libby, Montana. (cdc.gov)
  • Lung cancer mortality and fibre exposures among North Carolina asbestos textile workers. (cdc.gov)
  • In at least one mine, children were used to trample shipping bags filled with amosite, and in doing so received what is thought to have been the highest ever inhalation dose of amphibole asbestos. (lyellcollection.org)
  • This is in marked contrast to the amphibole tremolite , which was also investigated using the same inhalation biopersistence protocol. (curehunter.com)
  • In 1897 a Viennese physician attributed emaciation and pulmonary problems to (asbestos) dust inhalation. (environmentalchemistry.com)
  • Asbestos use continued to grow through most of the 20th century until public knowledge (acting through courts and legislatures) of the health hazards of asbestos dust outlawed asbestos in mainstream construction and fireproofing in most countries. (wikipedia.org)
  • Class IV asbestos work means maintenance and custodial activities during which employees contact but do not disturb ACM or PACM and activities to clean up dust, waste and debris resulting from Class I, II, and III activities. (cornell.edu)
  • When vermiculite is mined, often so too are trace amounts of asbestos dust. (newsociety.com)
  • Residual asbestos dust, as was found in the Libby vermiculite, is already friable as it is not in any stable compound. (newsociety.com)
  • Needle or filamentous shaped dust is released when working with asbestos. (bioportfolio.com)
  • 1.6 Warning- Breathing of asbestos dust is hazardous. (astm.org)
  • In addition to other precautions, when working with asbestos-cement products, minimize the dust that results. (astm.org)
  • 1.3 Warning- Breathing of asbestos dust is hazardous. (astm.org)
  • Asbestos was widely used during the 20th century until the 1970s, when public recognition of the health hazards of asbestos dust led to its prohibition in mainstream construction and fireproofing in most countries. (wikipedia.org)
  • Now people recognize the health hazard that asbestos dust poses, and it is banned or strictly regulated in most nations around the world. (wikipedia.org)
  • These desirable properties made asbestos a very widely used material, and its use continued to grow throughout most of the 20th century until the carcinogenic effects of asbestos dust caused its effective demise as a mainstream construction and fireproofing material in most countries. (netlibrary.net)
  • The plaintiffs' expert, Dr. William Longo, presented results of a 'work simulation' study that involved grinding and abrading the gaskets with various methods to create dust, which he failed to analyze for asbestos content. (forbes.com)
  • 17 Home renovation is a popular activity in Australia, and asbestos-containing materials may be a source of exposure to householders if respirable asbestos dust is released. (mja.com.au)
  • In 1966 Ted Pysden from James Hardie said a newspaper article about asbestos was - 'merely one of many reports of world studies which have been conducted since 1935 when the association between exposure to dust and carcinoma of the lung, mesothelioma of the pleura, tumour of the bladder and uterus and other fatal complaints was first recognised … The only preventive action is to eliminate the presence of dust. (ohsrep.org.au)
  • Naturally occurring asbestos can also be harmful and difficult to control, especially when it becomes dust and can be transported on the wind. (eurekalert.org)
  • The first medical article on the hazards of asbestos dust appeared in the British Medical Journal in 1924. (bmj.com)
  • Following inquiries by Edward Merewether and Charles Price, the British government introduced regulations to control dangerous dust emissions in UK asbestos factories. (bmj.com)
  • 5 Such scientific disputes and policy uncertainties conform to a long standing pattern whereby medical knowledge about the health hazards of asbestos dust has emerged slowly and sometimes falteringly since the early 20th century. (bmj.com)
  • Asbestos: when the dust settles an imaging review of asbestos-related disease. (radiopaedia.org)
  • NIOSH's report urges the agency to use wet mop-up procedures whenever possible to help reduce the amount of dust and potential asbestos exposures. (aiha.org)
  • Pliny the Elder suggested the use of a respirator made of transparent bladder skin to protect workers from asbestos dust. (environmentalchemistry.com)
  • He pointed out that this fibrotic scarring of lungs resulting from prolonged exposure to asbestos dust could have a latency period of 15 years. (environmentalchemistry.com)
  • Amphiboles are more easily turned to dust with finger pressure (known as "friable) and therefore more hazardous than Chrysotile which is very flexible. (hubpages.com)
  • Most amphibole asbestos was mined as crocidolite (blue) and amosite (brown) from Precambrian banded ironstones in South Africa and, to a lesser extent, Western Australia. (lyellcollection.org)
  • South Africa now has the highest rate of asbestos-induced mesothelioma in the world, with this invariably fatal cancer responsible for over 9% of deaths in a study conducted in a former Cape crocidolite mining town. (lyellcollection.org)
  • Amosite , CAS No. 12172-73-5, is a trade name for the amphiboles belonging to the Cummingtonite - Grunerite solid solution series, commonly from Africa , named as an acronym from Asbestos Mines of South Africa. (wikidoc.org)
  • Asbestos deposits can be found throughout the world and are still mined in Australia, Canada, South Africa, and the former Soviet Union. (nemmar.com)
  • Interleukin-8 mRNA levels were quantified by qRT-PCR to measure relative pro-inflammatory response induced in HAEC in response to amphibole fiber exposure. (biomedcentral.com)
  • Along with the material's ability to penetrate lung tissue, another important factor in the development of asbestos-related disease is the length of time the fiber resides in the body. (mesotheliomasymptoms.com)
  • These fibrils are arranged in parallel and a single microscopically-observed asbestos fiber can represent multiple fibrils that have not separated. (cdc.gov)
  • The main difference between serpentine and amphibole asbestos is fiber appearance. (mesothelioma.com)
  • 1.1 This test method covers the determination of the length distribution and fines content of milled asbestos fiber by wet classification employing the McNett fiber classifier. (astm.org)
  • Asbestos Fiber: A fiber of asbestos meeting the criteria for a fiber. (osha.gov)
  • Amphibole asbestos exposure is the fiber type most frequently implicated. (springer.com)
  • In one series, 77% of patients had reported a history of asbestos exposure, corroborated in a subset of cases with measurements of pulmonary fiber load. (springer.com)
  • A natural mineral fiber that is either mined or quarried, asbestos can be spun, woven, or felted, almost like cotton and wool. (britannica.com)
  • However, the publications they cited generally involved issues of asbestos exposure in buildings and were not pertinent to occupational exposures to chrysotile, which was the subject of our paper. (cdc.gov)
  • Fortunately, asbestos exposures due to vermiculite can now largely be avoided by being conscious of the material you are working with and identifying potentially hazardous vermiculite granules. (newsociety.com)
  • Garlock had negotiated settlements in 99% of some 20,000 asbestos lawsuits, the judge noted, but then as remaining defendants went bankrupt plaintiff lawyers escalated their demands at the same time as evidence of other exposures 'disappeared. (forbes.com)
  • Short-term and one-time asbestos exposures, such as what might occur in a home remodeling project or homeowner installation of loose-fill insulation, are much less likely to cause health problems. (pleuralmesothelioma.com)
  • Since asbestos is a hazardous substance, its waste must be disposed of in designated (Asbestos Containing Material) landfills where the area is prepped for asbestos waste in an effort to limit environmental exposures. (mesothelioma.com)
  • NIOSH recently visited the site of a prescribed burn near a former vermiculite mine in Montana to evaluate wildland firefighters' exposures to asbestos. (aiha.org)
  • A final report released by the Agency for Toxic Substances and Disease Registry (ATSDR) concludes that current exposures to naturally occurring amphibole asbestos from campus soil at Oak Ridge High School have been minimized by the mitigations conducted by the El Dorado Union High School District (EDUHSD) and the U.S. Environmental Protection Agency. (cdc.gov)
  • Estimates of historical exposures by phase contrast and transmission electron microscopy in North Carolina USA asbestos textile plants. (cdc.gov)
  • It is probable that the issue may depend critically on asbestos fibre type, an aspect not so far addressed. (bmj.com)
  • Differences in the carcinogenic potency of different asbestos fibre types are debated in the scientific community. (bmj.com)
  • An asbestos fibre about the diameter of a human hair is actually a bundle of nearly 2 million fibrils that can fit on a pin head. (ohsrep.org.au)
  • Once airborne, there are no means of making an asbestos fibre safe. (ohsrep.org.au)
  • Though valued since ancient times for its resistance to fire, asbestos fibre did not achieve commercial importance until the 19th century. (britannica.com)
  • After mining or quarrying, the asbestos fibre is freed by crushing the rock and is then separated from the surrounding material, usually by a blowing process. (britannica.com)
  • By the 1970s Quebec in Canada and the Urals region of the Soviet Union were the major sources of asbestos fibre, and the United States led the world in the manufacture of asbestos products. (britannica.com)
  • Asbestos fibre is heat- and chemical-resistant, a flame-retardant, has exceptional insulation properties, absorbs sound, is flexible and has a very high tensile strength. (hubpages.com)
  • The airborne asbestos fibre concentrations were determined in all areas. (who.int)
  • It is the fibrous form of the amphibole riebeckite. (wikidoc.org)
  • Glaucophane, crocidolite, riebeckite and arfvedsonite form a somewhat special group of alkali-amphiboles. (wikipedia.org)
  • It is a fibrous blue mineral and belongs to the riebeckite family of amphibole silicates. (artfire.com)
  • In the mid 1970s, other materials containing asbestos were banned. (mesotheliomasymptoms.com)
  • In the 1970s, following enactment of various laws that established Federal agencies such as the Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA) with missions to protect the environment, the general public, workers, and consumers, some uses of asbestos began to be banned or otherwise regulated. (cdc.gov)
  • Asbestos mining in the United States reached its height in the late 1960s and early 1970s. (mesothelioma.com)
  • Asbestos mining reached a peak in the late 1960s and early 1970s. (mesothelioma.com)
  • Reports of long-term harmful effects of asbestos exposure began appearing in the 1970s, although dangers associated with asbestos were suspected decades earlier. (howstuffworks.com)
  • Asbestos use has been banned in many industrialised countries since the 1970s, but asbestos-containing materials are still found in many buildings in Australia, including domestic residences. (mja.com.au)
  • Much of the use of asbestos in the United States was diminished in the 1970s and 1980s with the development of suitable alternatives for certain applications, and asbestos has not been mined or otherwise produced in the U.S. since 2002. (exponent.com)
  • Minnesota's first asbestos deposits were found in the Iron Hills area, which is where many iron mines were operating again in the 1970s. (mesotheliomatreatmentcenters.org)
  • Once these health risks were firmly documented in the 1970s, regulatory agencies in the United States and other developed nations began placing tight restrictions on workers' exposure to asbestos in industrial plants. (britannica.com)
  • [11] Nonetheless, the asbestos industry attempted to cover up the risks of asbestos into the 1970s [12] (sounds familiar, doesn't it? (rationalwiki.org)
  • An abnormally high incidence of lung disease has been observed in the residents of Libby, Montana, which has been attributed to occupational and environmental exposure to fibrous amphiboles originating from a nearby contaminated vermiculite mine. (biomedcentral.com)
  • Patients who had occupational and non-occupational exposure to asbestos in Libby were evaluated for progressive loss of pulmonary function. (ilo.org)
  • 5. The method of claim 1 , wherein the composition is administered to an individual who has inhaled silica or asbestos particles due to an occupational exposure. (google.com)
  • In this study, we investigate self-reported non-occupational asbestos exposure during home renovation in New South Wales. (mja.com.au)
  • 1 , 2 Although estimates suggest that more than 125 million people are exposed to asbestos in occupational settings, 3 the number of people non-occupationally exposed is not known. (mja.com.au)
  • Most people never realized occupational exposure to asbestos could make them sick. (sokolovelaw.com)
  • The purpose of GAAW is to educate people on the dangers of asbestos - something so many people incorrectly perceive to be an occupational hazard that was put to bed with the global trend towards the banning of asbestos in recent years. (hubpages.com)
  • An evaluation of potential occupational exposure to asbestiform amphiboles near a former vermiculite mine. (cdc.gov)
  • It is a simple model designed for sampling of asbestos, lead and other airborne contaminates. (environmental-expert.com)
  • Asbestos24™ is a simple 24 hour test which measures airborne asbestos as well as PM10 and PM2.5 particles. (environmental-expert.com)
  • Asbestos is believed to only be a significant hazard when it has become airborne. (mesotheliomasymptoms.com)
  • Critical barrier means one or more layers of plastic sealed over all openings into a work area or any other similarly placed physical barrier sufficient to prevent airborne asbestos in a work area from migrating to an adjacent area. (cornell.edu)
  • Employee exposure means that exposure to airborne asbestos that would occur if the employee were not using respiratory protective equipment . (cornell.edu)
  • These disorders are characterized by scarring of the tissue between the air sacs in the lungs, which is often caused by exposure to dangerous airborne materials like asbestos. (sokolovelaw.com)
  • Thus, asbestos cement sheeting, commonly known as "fibro", was intensively produced and used during this period. (mja.com.au)
  • The most commonly found asbestos in commercial products that most people suffer from is chrysotile. (healthguidance.org)
  • EPA has also developed a list of commonly used Asbestos acronyms . (ehso.com)
  • By the 1980s and 1990s, asbestos trade and use were heavily restricted, phased out, or banned outright in an increasing number of countries. (wikipedia.org)
  • Since the mid 1980s, many uses of asbestos are banned in many countries. (wikidoc.org)
  • From the 1920s to the late 1980s, every one of these facilities used asbestos-containing materials for production. (asbestos.net)
  • Despite this, widespread asbestos use continued until the late 1980s when the health risks were publicly identified, and the government enacted asbestos regulations. (asbestos.net)
  • By the 1980s and 1990s asbestos trade and use started to become banned outright, phased out, or heavily restricted in an increasing number of countries. (netlibrary.net)
  • Particularly for those who worked with asbestos (this was often the case before the dangers were fully understood and it was very popular between the 1940s and 1980s due to its heat resistance, conductance and chemical resistance) this can be a serious issue to look out for, and the symptoms of asbestos poisoning may take between 15 and 40 years before they make themselves known. (healthguidance.org)
  • In the mid 1980s the US EPA estimated that 20% of all public buildings in the US contained some type of ACBMs (Asbestos Containing Building Materials) that was friable. (ohsrep.org.au)
  • Asbestos cement materials were made in Australia from 1917 to the mid-1980s so even the very youngest asbestos cement roof has been subjected to over twenty years of weathering, heat, cold, rain, hail and winds. (ohsrep.org.au)
  • Since the 1980s various substitutes for asbestos have been developed for use in many products. (britannica.com)
  • In the 1980s, earth scientists helped medical scientists to recognize that there was more than one type of material called asbestos, and that the different asbestos materials are not equally carcinogenic. (geotimes.org)
  • In Québec, asbestos-containing materials were used abundantly in buildings constructed prior to the 1980s ( 5 ). (inspq.qc.ca)
  • Scanning Electron Microscopy and Transmitted Electron Backscatter Diffraction Examination of Asbestos Standard Reference Materials, Amphibole Particles of Differing Morphology, and Particle Phase Discrimination from Talc Ores. (rjlg.com)
  • Bandli , B.R. and M.E. Gunter, "Scanning Electron Microscopy and Transmitted Electron Backscatter Diffraction Examination of Asbestos Standard Reference Materials, Amphibole Particles of Differing Morphology, and Particle Phase Discrimination from Talc Ores", Microscopy and Microanalysis, Vol. 20(6), pp. 1805-1816, 2014. (rjlg.com)
  • Asbestos in commercial indian talc. (bioportfolio.com)
  • Easily available commercial Indian talc products widely used in Southeast Asia were examined for the presence of asbestos. (bioportfolio.com)
  • Asbestos in talc products carry all risks of asbestos-related disease. (bioportfolio.com)
  • Asbestos deposits can be found around natural talc and vermiculite deposits. (mesothelioma.com)
  • Johnson & Johnson suffered its first loss in an asbestos-related talcum powder lawsuit Thursday after a New Jersey jury ordered the company and its talc supplier to pay $37 million in damages. (medworm.com)
  • Amphibole asbestos is associated with talc deposits in Hudspeth County. (tshaonline.org)
  • Topics include characterization of amphiboles including those associated with vermiculite, talc and various ores and quarried rock. (prweb.com)
  • According to the study, similar amphibole deposits have been found in surface sites in Arizona and Nevada. (asbestos.com)
  • Deposits of asbestos are found throughout the world. (wikidoc.org)
  • Asbestos is a mineral that naturally occurs in deposits all over the world. (asbestos.net)
  • Unfortunately, many vermiculite deposits are known to contain not only the targeted mineral, but also hazardous asbestos. (newsociety.com)
  • Asbestos is found in naturally occurring deposits around the world. (mesothelioma.com)
  • Asbestos deposits are located across the United States, mainly in the western U.S. and eastern coastal states. (mesothelioma.com)
  • In fact, New Mexico is home to six natural asbestos deposits due to its unique geology. (mesothelioma.com)
  • Although asbestos deposits can be found all over the world, most of the world's asbestos comes from a few nations. (egyptflowers.net)
  • Asbestos is widely distributed, but the largest deposits are found in Canada and Russia. (bmj.com)
  • Modern asbestos production began in 1868 with the workings of a mine in Italy , and in 1878 large-scale production from deposits in Quebec began. (britannica.com)
  • Individuals exposed to asbestos face health risks including cancer and other illnesses. (mesothelioma.com)
  • Asbestos and asbestos products present demonstrated health risks for users and for those with whom they come into contact. (astm.org)
  • Because of the severe health risks posed by asbestos, it is critically important for informed consumers to be aware of the exposure risk in their environment. (bloggernews.net)
  • Health risks associated with amphibole exposure are much greater than those with chrysotile. (mja.com.au)
  • The research team, which was led by a medical-school professor from the University of Vermont and included researchers from four other institutions, also said that the risk of an asbestos-related death due to a school exposure is 'magnitudes lower' than the risks posed by whooping-cough vaccines, participation in high-school football, and smoking. (edweek.org)
  • They understand the serious health risks that are involved in asbestos being in your home and in the removal of asbestos. (diamondcertified.org)
  • The Federal Agency for Toxic Substances and Disease Registry (ATSDR) today released the final version of its health consultation for El Dorado Hills, CA. The health consultation says that people should use caution in areas of naturally occurring asbestos to reduce potential health risks from exposure. (cdc.gov)
  • People can minimize potential health risks from naturally occurring asbestos in the El Dorado Hills area by taking precautions, according to a health consultation by the Agency for Toxic Substances and Disease Registry (ATSDR). (cdc.gov)
  • If asbestos is present, it should be monitored to ensure that the area is still safe and that the particles have not been disturbed. (mesotheliomasymptoms.com)
  • Drill press operation released vast quantities of raw asbestos particles into the air and left behind mounds of asbestos-laden metal filings and shavings. (asbestos.net)
  • Inhaled asbestos particles lodge in the lung and can penetrate to the pleura and even peritoneum . (radiopaedia.org)
  • While Pliny or his nephew Pliny the Younger is popularly credited with recognising the detrimental effects of asbestos on human beings, examination of the primary sources reveals no support for either claim. (wikipedia.org)
  • What Are the Side Effects of Asbestos? (reference.com)
  • These and other potentially deleterious health effects of asbestos have been recognized and studied for decades. (geotimes.org)
  • The community of Libby, Montana was recently the focus of national attention following a widespread amphibole contamination associated with vermiculite mining and processing. (ilo.org)
  • In contrast, some have argued that pure chrysotile "may present little or no carcinogenic hazard" if uncontaminated by amphiboles. (bmj.com)
  • 1.2 The test method is applicable to all grades and varieties of homogeneous milled asbestos. (astm.org)
  • Numerous subspecies and varieties of amphibole are known, the more important of which are shown below. (newworldencyclopedia.org)
  • Therefore, we welcome their statement that the thrust of the amphibole hypothesis is only for mesothelioma. (cdc.gov)
  • Get help obtaining veteran benefits for mesothelioma and asbestos illnesses. (asbestos.com)
  • We're ultimately hoping [with this trial] to forge a new standard of care for mesothelioma," Dr. Patrick Ma, lead investigator at WVU Cancer Center, told Asbestos.com. (asbestos.com)
  • Were You Exposed to Asbestos and then Diagnosed with Mesothelioma? (asbestos.net)
  • Did You Develop Mesothelioma Due to Work Site Asbestos Exposure? (asbestos.net)
  • Exposed to Asbestos and Developed Mesothelioma? (asbestos.net)
  • There is over $30 Billion in asbestos trust funds for mesothelioma victims. (asbestos.net)
  • When the mine's employees and residents of the town began to become ill with mesothelioma (an aggressive form of cancer known to be caused only by asbestos exposure) and other respiratory conditions, it became clear that asbestos contamination had become a major issue in commercial vermiculite mining. (newsociety.com)
  • Asbestos cancer is among the most devastating malignancies known and mesothelioma treatment is typically limited to palliative therapies to ease symptoms. (newsociety.com)
  • Those exposed risk illnesses such as mesothelioma and other asbestos cancers. (mesothelioma.com)
  • In a 65-page order released late today, U.S. Bankruptcy Judge George Hodges set Garlock's liability at $125 million, a fraction of the $1.4 billion plaintiff lawyers said the company owes present and future victims of mesothelioma, a deadly cancer caused by asbestos. (forbes.com)
  • The main cause of mesothelioma is exposure to asbestos. (pleuralmesothelioma.com)
  • Doctors first suspected the connection between asbestos and mesothelioma in the 1890s. (pleuralmesothelioma.com)
  • The heavier the asbestos exposure and the longer a person is exposed throughout their lifetime, the higher the risk for mesothelioma . (pleuralmesothelioma.com)
  • How Does Asbestos Cause Mesothelioma? (pleuralmesothelioma.com)
  • A 2018 study published in Frontiers in Immunology detailed a newly discovered mechanism for how asbestos may lead to mesothelioma. (pleuralmesothelioma.com)
  • Is Asbestos the Only Cause of Mesothelioma? (pleuralmesothelioma.com)
  • Although mesothelioma can occur without previous asbestos exposure, this is exceedingly rare. (pleuralmesothelioma.com)
  • Yet even in the family members with the RBM15 mutation, most who developed mesothelioma also had documented histories of asbestos exposure. (pleuralmesothelioma.com)
  • The Mesothelioma Cancer Alliance provides support for asbestos cancer patients and caregivers. (mesothelioma.com)
  • Asbestos exposure is causally associated with the development of malignant mesothelioma (MM), which is increasingly being reported after exposure to asbestos fibro sheeting in Australia. (mja.com.au)
  • Mesothelioma meanwhile is a type of cancer that attacks the tiny membranes surrounding the lungs and abdomen, while more general cancer is also common and one of the largest causes of death among asbestos sufferers. (healthguidance.org)
  • Our attorneys help families affected by asbestos seek and recover the compensation they need to seek out the best medical treatments, pay expensive medical bills, meet their financial responsibilities and achieve the highest quality of life following a mesothelioma diagnosis. (mesotheliomatreatmentcenters.org)
  • The MN Department of Health confirmed that there was a much higher rate of mesothelioma for men in NE Minnesota, and it was concluded it most likely was because asbestos mine workers were handling parts of the taconite production duties. (mesotheliomatreatmentcenters.org)
  • Only then, with the discoveries that mesothelioma was an asbestos related disease and that workers other than those employed in the dustiest parts of asbestos factories were at risk, were the nature and scale of the hazard reassessed. (bmj.com)
  • Most of those who get mesothelioma or other asbestos related health problems were exposed to asbestos for a very long time. (diamondcertified.org)
  • Mesothelioma and Asbestos in the Province of Quebec, 1969-1972. (ebscohost.com)
  • Recounts the records of patients mortality due to mesothelioma and asbestos during the period 1969-1972 in the province of Quebec. (ebscohost.com)
  • Linda Reinstein is the widow of Alan Reinstein who died on May 22 2006 after being diagnosed with the asbestos-related mesothelioma. (hubpages.com)
  • The prevalence of mesothelioma increased with increased cumulative exposure to asbestos. (who.int)
  • In a mortality study conducted in Québec, 38 mesothelioma deaths were observed up to 1992 among 10,918 asbestos mine and mill workers and workers in one asbestos products factory ( 8 ). (inspq.qc.ca)
  • These properties make asbestos commercially useful but also stable in the environment. (cdc.gov)
  • IAN PLIMER: It is called commercially asbestos. (abc.net.au)
  • IAN PLIMER: As I said it's called commercially asbestos. (abc.net.au)
  • A mineral product that is flexible, possesses high tensile strength, is heat resistant, resistant to chemical degradation, and can be woven into fabric is commercially designated as "asbestos. (mesotheliomacenter.org)
  • Asbestos is also mined commercially in the United States. (ehso.com)
  • Asbestos (pronounced: /æsˈbɛstɒs/ or /æsˈbɛstəs/) is a naturally occurring fibrous silicate mineral. (wikipedia.org)
  • One of the 10 substances selected was asbestos, a naturally-occurring fibrous mineral. (exponent.com)
  • The primary cause of these errors has been a poor understanding of mineralogy and analytical techniques among the many asbestos laboratories that arose following the passage of the 'Asbestos Hazardous Emergency Response Act' (AHERA) regulations. (rjlg.com)
  • Why is Asbestos Hazardous? (mesotheliomasymptoms.com)
  • While W.R. Grace was mining vermiculite before existing regulations were in place, the fact is that even vermiculite which contains less than one percent asbestos is potentially hazardous to human health. (newsociety.com)
  • Hazardous materials like asbestos can cause serious health problems. (diamondcertified.org)
  • Asbestos causes a number of health problems and this is as a result of its being breahted into the lungs. (healthguidance.org)
  • Absestosis is caused by the physical presence of asbestos in the lungs which causes scarring and fibrosis. (healthguidance.org)
  • Asbestos mining existed more than 4,000 years ago, but large-scale mining began at the end of the 19th century, when manufacturers and builders began using asbestos for its desirable physical properties. (wikipedia.org)
  • Asbestos became increasingly popular among manufacturers and builders in the late 19th century due to its resistance to heat, electricity and chemical damage, sound absorption and tensile strength. (wikidoc.org)
  • Archaeological studies have found evidence of asbestos being used as far back as the Stone Age to strengthen ceramic pots, but large-scale mining began at the end of the 19th century when manufacturers and builders began using asbestos for its desirable physical properties. (wikipedia.org)
  • Asbestos was used for thousands of years for various things, such as construction and pottery, although large-scale mining didn't begin until the 19th century. (rationalwiki.org)
  • Near the end of the 19th century, the use asbestos became even more widespread as a result of the industrial revolution. (environmentalchemistry.com)
  • Each type belongs to the serpentine or amphibole asbestos mineral family. (mesothelioma.com)
  • Designed for general awareness, this video explains what asbestos is, where it is found, and how to reduce exposure to this carcinogen. (environmental-expert.com)
  • Biotite would often be found in close proximity to another mineral known as diopsid, which over millions of years and the same weathering conditions would eventually become asbestos, a known carcinogen. (newsociety.com)
  • Asbestos is a carcinogen. (bioportfolio.com)
  • Although asbestos is a known carcinogen the United States has as yet not banned asbestos and Canada continues to mine and export asbestos to developing countries. (hubpages.com)
  • A plaque caused by asbestos exposure on the diaphragmatic pleura. (wikipedia.org)
  • This restriction sharply limits the public health relevance of the hypothesis, since most studies have found that asbestos produces more lung cancers than mesotheliomas. (cdc.gov)
  • Continuing long-term use of asbestos after harmful health effects were known or suspected, and the slow emergence of symptoms decades after exposure ceased, made asbestos litigation the longest, most expensive mass tort in U.S. history and a much lesser legal issue in most other countries involved. (wikipedia.org)
  • The recent study was done by doctors and scientists from the Mount Sinai Health System and Northwell Health in New York, the University of Montana, Montana State University and the Center for Asbestos Related Disease (CARD) in Libby. (asbestos.com)
  • This was due to growing scientific evidence concerning the association of asbestos with serious health effects. (cdc.gov)
  • Environmental Health Education for Asbestos-Contaminated Communities in Italy: The Casale Monferrato Case Study. (bioportfolio.com)
  • This Public Health Statement is the summary chapter from the Toxicological Profile for Asbestos . (cdc.gov)
  • This public health statement tells you about asbestos and the effects of exposure. (cdc.gov)
  • We present a review of the findings of this emerging environmental health concern impacting not only the residents of Libby but applicable to other populations living near asbestos-contaminated areas. (cdc.gov)
  • However, it is now a well-known health and safety hazard and the use of asbestos as a building material is illegal in many countries. (wikipedia.org)
  • [3] [4] Health issues related to asbestos exposure can be found in records dating back to Roman times . (netlibrary.net)
  • Asbestos will continue to have a serious impact on public health for many decades to come, however, as the quantity of existing asbestos products in homes, schools, offices, and other structures is vast. (bloggernews.net)
  • 11 , 12 MM secondary to exposure to asbestos-containing materials is an emerging public health problem. (mja.com.au)
  • Referring to another substance whose health effects allegedly have been exaggerated, although on the positive side, Bill Rukeyser, a spokesman for California's Superintendent of Public Instruction Bill Honig, joked last week: 'Asbestos may turn out to be the oat bran of the public-buildings world. (edweek.org)
  • They need to the training because asbestos is a highly dangerous mineral and can cause a number of health problems to those who its come into contact with. (egyptflowers.net)
  • In this article, we will strive to supply you with all the basic information about asbestos, how you could minimize the risk of exposure to better safeguard your health, and why its important you should consider undergoing asbestos training online. (egyptflowers.net)
  • Since the days of the Industrial Revolution, asbestos has been proven to cause a host of health complications and illnesses which require anyone in the profession that deals with or is at high risk of asbestos exposure to acquire Asbestos training online or from a qualified expert. (egyptflowers.net)
  • New York City estimated that 68% of all its buildings contained asbestos and that 81% of that asbestos was in such poor condition that it was a public health risk. (ohsrep.org.au)
  • On this page, you will find general information about asbestos and its health effects. (ehso.com)
  • Although many people live in homes where there is asbestos, they don't necessarily develop health problems. (diamondcertified.org)
  • If you are living around asbestos and not developing any health issues, then you may wonder why you should have the asbestos removed. (diamondcertified.org)
  • Just having asbestos in your home doesn't necessarily mean that you are going to develop a health issue. (diamondcertified.org)
  • Should Canadian health care professionals support the call for a worldwide ban on asbestos? (ebscohost.com)
  • and despite thousands of years of people's personal observations , asbestos was not known to be dangerous until scientific studies were done on its health effects in the 20th century. (rationalwiki.org)
  • There is still the rare crank who denies the health hazards of asbestos, such as journalist Christopher Booker . (rationalwiki.org)
  • Even though asbestos markets have declined dramatically over the past 30 years because of health and liability issues, it is still used throughout the world. (earthmagazine.org)
  • The story of asbestos is an all to familiar one, "A miraculous, do anything chemical substance is identified as a serious health hazard" - except for one thing. (environmentalchemistry.com)
  • Its use predates history, and the recognition of health hazards associated with asbestos is recorded in writings from the first century. (environmentalchemistry.com)
  • Both Pliny the Elder and the first century geographer Strabo noted that workers exposed to asbestos had many health problems. (environmentalchemistry.com)
  • Other ATSDR recommendations include continued state monitoring of health outcome data for asbestos-related disease and full enforcement of state and county air toxics regulations. (cdc.gov)
  • Residents will be able to ask federal scientists questions about their report examining health effects from naturally occurring asbestos later this month in El Dorado Hills. (cdc.gov)
  • Most apparent, in hand specimens, is that amphiboles form oblique cleavage planes (at around 120 degrees), whereas pyroxenes have cleavage angles of approximately 90 degrees. (wikipedia.org)
  • So don't let any Realtors tell you there's no asbestos in an older house you want to buy - unless they can prove they have microscopic vision! (nemmar.com)
  • There are two classes of asbestos: serpentine and amphibole. (cdc.gov)
  • There are several uses of asbestos, particularly in the realm of duct and pipe insulation, insulation in buildings , as well as in ceiling and wall panels. (mesotheliomasymptoms.com)
  • Please see the toxicological profile for more information on the properties and uses of asbestos. (cdc.gov)
  • These errors have received widespread publicity in the media (such as the asbestos-in-crayons story) and have caused unwar- ranted reformulation of harmless products. (rjlg.com)
  • A bankruptcy judge slashed by 90% the amount gasket manufacturer Garlock Sealing Technologies owes asbestos plaintiffs, citing the widespread practice of lawyers to inflate claims against the company by withholding evidence their clients were exposed to other sources of asbestos. (forbes.com)
  • Six mineral types are defined by the United States Environmental Protection Agency (EPA) as "asbestos" including those belonging to the serpentine class and those belonging to the amphibole class. (wikipedia.org)
  • The mining there, from 1919 to 1990, led to the longest-running man-made environmental disaster in American history and an asbestos cleanup project by the Environmental Protection Agency (EPA) just now coming to a close. (asbestos.com)
  • Most asbestos products were banned in the late 1970's by the Consumer Product Safety Commission and the Environmental Protection Agency. (newsociety.com)
  • Last week, the U.S. Environmental Protection Agency was busy defending the Asbestos Hazard Emergency Response Act of 1986, and rebutting the report's conclusion that inadequate scientific research and misguided attempts to regulate the problem have led to an 'asbestos panic. (edweek.org)
  • EPA's outdoor air testing for LAA in Libby and Troy indicates that asbestos air concentrations are now equivalent to those found in other Montana cities. (aiha.org)
  • Chrysotile has been used more than any other type and accounts for about 95% of the asbestos found in buildings in America. (wikipedia.org)
  • The following three references show that profusion reading of 1/0 can be found in non-asbestos-exposed factory workers, and in middle-aged smokers. (lakesidepress.com)
  • The highest amphibole content, around 20%, is found in andesites. (wikipedia.org)
  • Asbestos has been banned in Iceland from 1983 but can still be found in large amounts in buildings, ships and hot water pipes. (bioportfolio.com)
  • Asbestos-containing materials (ACMs) can still be found in many homes in Australia and other countries. (bioportfolio.com)
  • Asbestos has been found in at least 83 of the 1,585 current or former NPL sites. (cdc.gov)
  • As more sites are evaluated, the sites at which asbestos is found may increase. (cdc.gov)
  • It's found in almost all asbestos-based products available today, including brake linings, building materials, water and sewer pipes and insulation. (cancer.ca)
  • Asbestos is found in a wide variety of commercial and industrial products. (bloggernews.net)
  • The risk evaluation for asbestos can be found here . (exponent.com)
  • Occasionally they are found as contaminants in asbestos containing materials. (ehso.com)
  • The naturally occurring asbestos was found in Boulder City, Nevada, in the path of a construction zone to build a multi-million dollar highway called the Boulder City Bypass, the first stage of an I-11 corridor planned between Las Vegas and Arizona. (eurekalert.org)
  • Asbestos can be found in tiles, insulation, paint, and cement as well as other items. (diamondcertified.org)
  • However, evidence of the use of asbestos in pottery and chinking of log homes dating back 3000 BC has been found archeological digs in Scandinavia. (environmentalchemistry.com)
  • Metallic ions found in different types of amphiboles include iron , magnesium , calcium , aluminum , and sodium ions. (newworldencyclopedia.org)
  • Pargasite is a rare, magnesium-rich amphibole with essential sodium , usually found in ultramafic rocks. (newworldencyclopedia.org)
  • In this study, we conduct a comparative particle toxicity analysis of LA compared with standard reference asbestiform amphibole samples. (biomedcentral.com)
  • Scientists are still researching the amount of asbestos that is in the soil in the construction area, its toxicity to humans, and how far it can be transported by wind. (eurekalert.org)
  • This vermiculite ore was contaminated with fibrous and asbestiform amphibole in veins throughout the deposit. (cdc.gov)
  • Amosite, a variety of the silicate mineral cummingtonite, which is a source of asbestos (see cummingtonite). (britannica.com)
  • Amphiboles are composed of double-chain silicate (SiO 4 ) tetrahedra, which are linked at their vertices. (newworldencyclopedia.org)
  • The chief differences between amphiboles and pyroxenes are that amphiboles contain essential hydroxide ions, and the basic structure of an amphibole is a double chain of silicate tetrahedra, as opposed to the single chain structure of pyroxene. (newworldencyclopedia.org)
  • MVA Scientific Consultants is pleased to announce the presentation of it s new course entitled:  Advanced Asbestos Analysis by Transmission Electron Microscopy  which will be offered for 3 days, March 8  May 10, 2005. (prweb.com)
  • If you would like to learn more about the laws and regulations that govern asbestos, EPA maintains a listing of the laws and regulations applicable to asbestos. (ehso.com)
  • The studies carried out in Québec in asbestos products factories and in the construction industry show that the current laws and regulations are not always enforced, thereby leading to the finding that asbestos is not used safely in these industries. (inspq.qc.ca)
  • Furthermore, when employers and workers know that asbestos is present, it is difficult to enforce existing regulations because the protective measures are constraining. (inspq.qc.ca)