Dust: Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)Cosmic Dust: Finely divided solid matter with particle sizes smaller than a micrometeorite, thus with diameters much smaller than a millimeter, moving in interplanetary space. (NASA Thesaurus, 1994)Air Pollutants, Occupational: Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.Pyroglyphidae: Family of house dust mites, in the superfamily Analgoidea, order Astigmata. They include the genera Dermatophagoides and Euroglyphus.Mites: Any arthropod of the subclass ACARI except the TICKS. They are minute animals related to the spiders, usually having transparent or semitransparent bodies. They may be parasitic on humans and domestic animals, producing various irritations of the skin (MITE INFESTATIONS). Many mite species are important to human and veterinary medicine as both parasite and vector. Mites also infest plants.Occupational Exposure: The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.Quartz: Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)Pneumoconiosis: A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. These inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (ASBESTOSIS; BYSSINOSIS; and others). Similar air pollution can also have deleterious effects on the general population.Wood: A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.Inhalation Exposure: The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.Byssinosis: A condition of BRONCHOCONSTRICTION resulting from hypersensitive reaction to inhaled dust during the initial processing of cotton, flax, or hemp in the textile industry. Symptoms include wheezing and tightness in the chest.Silicon Dioxide: 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.Environmental Monitoring: The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.Air Pollution, Indoor: The contamination of indoor air.Construction Materials: Supplies used in building.Allergens: Antigen-type substances that produce immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).Floors and Floorcoverings: The surface of a structure upon which one stands or walks.Textile Industry: The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed)MiningCoal: A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.Dermatophagoides pteronyssinus: Species of European house dust mite, in the family PYROGLYPHIDAE. It is the most commonly found house dust mite.Arthropod Proteins: Proteins synthesized by organisms belonging to the phylum ARTHROPODA. Included in this heading are proteins from the subdivisions ARACHNIDA; CRUSTACEA; and HORSESHOE CRABS. Note that a separate heading for INSECT PROTEINS is listed under this heading.Air Microbiology: The presence of bacteria, viruses, and fungi in the air. This term is not restricted to pathogenic organisms.Housing: Living facilities for humans.Silicosis: A form of pneumoconiosis resulting from inhalation of dust containing crystalline form of SILICON DIOXIDE, usually in the form of quartz. Amorphous silica is relatively nontoxic.Agricultural Workers' Diseases: Diseases in persons engaged in cultivating and tilling soil, growing plants, harvesting crops, raising livestock, or otherwise engaged in husbandry and farming. The diseases are not restricted to farmers in the sense of those who perform conventional farm chores: the heading applies also to those engaged in the individual activities named above, as in those only gathering harvest or in those only dusting crops.Dermatophagoides farinae: Species of American house dust mite, in the family PYROGLYPHIDAE.Flour: Ground up seed of WHEAT.Environmental Exposure: The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.Industry: Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.Interior Design and Furnishings: The planning of the furnishings and decorations of an architectural interior.Gossypium: A plant genus of the family MALVACEAE. It is the source of COTTON FIBER; COTTONSEED OIL, which is used for cooking, and GOSSYPOL. The economically important cotton crop is a major user of agricultural PESTICIDES.Threshold Limit Values: Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).Maximum Allowable Concentration: The maximum exposure to a biologically active physical or chemical agent that is allowed during an 8-hour period (a workday) in a population of workers, or during a 24-hour period in the general population, which does not appear to cause appreciable harm, whether immediate or delayed for any period, in the target population. (From Lewis Dictionary of Toxicology, 1st ed)Endotoxins: Toxins closely associated with the living cytoplasm or cell wall of certain microorganisms, which do not readily diffuse into the culture medium, but are released upon lysis of the cells.Respiration Disorders: Diseases of the respiratory system in general or unspecified or for a specific respiratory disease not available.Ventilation: Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)TextilesParticle Size: Relating to the size of solids.Respiratory Tract DiseasesHousekeeping: The care and management of property.Air Pollutants: Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or material. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.Meteoroids: Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Asbestos: 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.Metallurgy: The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (From Jablonski, Dictionary of Dentistry, 1992, p494)Asthma: A form of bronchial disorder with three distinct components: airway hyper-responsiveness (RESPIRATORY HYPERSENSITIVITY), airway INFLAMMATION, and intermittent AIRWAY OBSTRUCTION. It is characterized by spasmodic contraction of airway smooth muscle, WHEEZING, and dyspnea (DYSPNEA, PAROXYSMAL).Asbestos, Serpentine: 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)Respiratory Protective Devices: Respirators to protect individuals from breathing air contaminated with harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors.Hypersensitivity: Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.
DUSTDUST. New Dance Works by Four Emerging Choreographers. Daniel Costa, Kimberly Holloway, Emma Hreljanovic, Ashleigh Miller. ... DUST presents an evening of original works from four Seattle-based artists. Featuring four emerging choreographersDaniel Costa ... Join us; watch the dust settle.. Daniel Costas new work Interposition (working title) continues exploring highly athletic ...
Cosmic dust - Google Books... collisions cometary comets cosmic dust Cosmochim cumulative flux curve detection detectors diameter distribution Dohnanyi dust ... books.google.comhttps://books.google.com/books/about/Cosmic_dust.html?id=F4HvAAAAMAAJ&utm_source=gb-gplus-shareCosmic dust. ... fragments Gault Geochim Geophys Greenberg H II regions heliocentric distance HEOS Horz impact craters interplanetary dust ... 0 Reviewshttps://books.google.com/books/about/Cosmic_dust.html?id=F4HvAAAAMAAJ ...
Angel Dust - WikipediaAngel Dust (Faith No More) - álbum de 1992 da banda estadunidense de funk metal Faith No More; Angel Dust (banda) - banda de ... Angel Dust ("pó de anjo", expressão inglesa que se refere à droga alucinógena fenciclidina, também conhecida como PCP), pode se ... referir a: Angel Dust (Blutengel) - álbum da banda alemã de futurepop Blutengel; ...
Angel dust - WikipediaAngel Dust es el tercer álbum de la banda alemana de Dark Electro Blutengel donde participan por primera vez Constance y Eva ...
Eatin' Dust - WikipediaEatin' Dust é o sexto álbum de estúdio da banda de stoner rock californiana Fu Manchu, lançado em 1999 pela hoje falida ... "Godzilla" - 4:39 (cover de Blue Öyster Cult) "Module Overload" - 4:16 "Living Legend" - 5:08 "Eatin' Dust" - 3:08 "Shift Kicker ...
Dust Mite Reduction StudyDust mites are common anywhere there is dust, such as in carpeting and beds. Some people are allergic to dust mite allergens ... The dust samples are analyzed in the laboratory for dust mite allergens and the results are given to the participants at the ... Vacuumed dust samples will be collected and delivered to the NIEHS laboratory for ELISA-based measurements of the dust mite ... Dust mite allergens come from dust mites - microscopic spider-like animals that feed on housedust. ...
Diesel and Dust - WikipediaDiesel and Dust - Amazon.com Avaliação no All Music Guide Diesel and Dust (em inglês) no Allmusic. Acessado em 3 de julho de ... Diesel and Dust é o sexto álbum da banda australiana de rock Midnight Oil, lançado em 1987. Este álbum trouxe o sucesso ...
Dust 514 - Video DailymotionIn the universe of EVE Online, change the tide of war in Dust 514. ... change the tide of war in Dust 514. ...
Exit Planet Dust - WikipediaExit Planet Dust é o álbum de estreia da banda britânica de música eletrônica The Chemical Brothers, lançado no Reino Unido em ... "Leave Home" - 5:32 "In Dust We Trust" - 5:17 "Song to the Siren" - 3:16 "Three Little Birdies Down Beats" - 5:38 "Fuck Up Beats ...
DUST IDOLS Blog | ReverbNationBlog posts by DUST IDOLS, Rock music from Madrid, ES on ReverbNation ...
Laser Dust Emissions Compliance Monitor Articles on Environmental XPRTFind laser dust emissions compliance monitor articles on Environmental XPRT, the world's largest environmental industry marketplace and information resource.
NIOSHTIC-2 Publications Search - 00205423 - Microbiological analyses and inflammatory effects of settled dusts from rice and...A study of the microorganism, endotoxin, and aflatoxin content of settled agricultural dusts was conducted. Fourteen samples of settled dust were collected from two factories processing rice and wheat straw (hay) near Shanghai, China. These were analyzed for total bacteria, gram negative bacteria, thermophilic actinomycetes, fungi, endotoxin, and aflatoxins. The ability of aqueous extracts of the
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Metal Dust Hazards In Classic Sci-FiImperial Systems, Inc.OSHA scientists aren't the only ones who know how metal dust hazards can damage the human body. A classic Sci-Fi author knew one element that proved fatal.
African dust | LCZO-Datasamples collected in a mountaintop site in Puerto Rico. Cloudwater samples showed average concentrations of 1.09 mg L 1 of total organic carbon (TOC), of 0.85 mg L 1 for dissolved organic carbon (DOC) and of and 1.25 mg L 1 for total nitrogen (TN). Concentrations of organic nitrogen (ON) changed with the origin of the air mass. Changes in their concentrationswere observed during periods under the influence of African dust (AD). The ON/TN ratios were 0.26 for the clean and 0.35 for the AD periods. Average concentrations of all these species were similar to those found in remote environments with no anthropogenic contribution. In the AD period, for cloud water the concentrations of TOC were 4 times higher and TN were 3 times higher than during periods of clean air masses associated with the trade winds. These results suggest that a significant fraction of TOC and TN in cloud and rainwater is associated to airborne particulate matter present in dust. Functional groups were ...
City soils provide new leadRight: sample chambers in the experimental hutch for the XAS beamline The Sydney findings are consistent with earlier studies by US researchers, who found that soil accounts for around two-thirds of the lead in house dust with interior lead-based paint sources contributing the remainder. A separate UK study found that the proportion of road dust and garden soil was higher in the smaller particles of house dust that were more likely to cling to children's hands.. How does lead from outside soil and dust get into the house? "It's usually carried inside on the soles of dirty footwear or by pets," Mark Laidlaw explains. "It can also drift or be blown inside houses in the form of tiny airborne particles.". Mark and Mark also found that exterior atmospheric lead loading rates and interior vacuum bag lead levels were lower in winter than in summer.. Increased lead exposure is known to adversely affect intelligence levels in children. High exposure ...
Oblivion Dust - Plastic Wings lyrics | LyricsMode.comPlastic Wings lyrics by Oblivion Dust: Sleep sand and dust have made me feel old and paranoid / I need control, I need to glow once again
particle size of stone crusher dustA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust Crushers may be used to reduce the size, or change the form, of waste .Online ...
Burgeoning Bhubaneswar breathes development dust - Times of IndiaThough the Orissa State Pollution Control Board (OSPCB) is monitoring the air quality on a regular basis and alerting the BMC as well as the works and NH departments to take steps to ensure less dust generation, its recommendations are reportedly not being adhered to.
Hypersensitivity Disease of the Lungs Due to Fungi and Organic Dusts. | JAMA Internal Medicine | The JAMA NetworkThe name of Pepys with a London dateline conjures up images of Restoration intrigue and compulsive clandestine chronicle keeping. I could find no hint of such r
Once the Dust Settles, Bring Back the Party of California - latimesFor the last 10 months, we Californians have subjected ourselves to an unprecedented exercise. We have risked -- some would say lost -- our reputation as a responsible commonwealth. We have spent
Xanthan Gum Low Dust, Food Grade, 40 MeshHS Code : 3913900090. CAS No. : 11138-66-2. FOODCHEM No. : K910. Qty in 20' FC : 20000.00 KGS. Min. Order : 500.00 KGS. Packaging : 25 KGS/BAG. Payment Terms : L/C,D/A,D/P,T/T,O/A. Delivery Time : 2-3. ...
r o b i n 's y a r d: Merge with the dustΜια ματιά στο βασίλειο των φυτών, μέσα και γύρω απ΄ την Θεσσαλονίκη, φυτών που όλοι μας κάπου θα τα έχουμε συναντήσει και προσπεράσει βιαστικά χωρίς να δώσουμε ιδιαίτερη σημασία και προσοχή ...
TYWKIWDBI ("Tai-Wiki-Widbee"): Bejeweled skeletonsNuns were often renowned for their achievements in clothmaking. They spun fine mesh gauze, which they used to delicately wrap each bone. This prevented dust from settling on the fragile material and created a medium for attaching decorations. Local nobles often donated personal garments, which the nuns would lovingly slip onto the corpse and then cut out peepholes so people could see the bones beneath. Likewise, jewels and gold were often donated or paid for by a private enterprise. To add a personal touch, some sisters slipped their own rings onto a skeleton's fingers ...
Ground lineground ground (ground), n. [OE. ground, grund, AS. grund; akin to D. grond, OS., G., Sw., & Dan. grund, Icel. grunnr bottom, Goth. grundus (in composition); perh. orig. meaning, dust, gravel, and if so perh. akin to E. grind.] 1. The surface of…
Mineral dust: Mineral dust is a term used to indicate atmospheric aerosols originated from the suspension of minerals constituting the soil, being composed of various oxides and carbonates. Human activities lead to 30% of the dust load in the atmosphere.Interstellar cloud: Interstellar cloud is the generic name given to an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellar cloud is a denser-than-average region of the interstellar medium.Brevipalpus: Brevipalpus is a genus of mites in the family Tenuipalpidae, the flat mites.Brevipalpus californicus.Occupational hygiene: Occupational (or "industrial" in the U.S.Quartz tube furnacePneumoconiosisWood fibre: Wood fibers are usually cellulosic elements that are extracted from trees and used to make materials including paper.ByssinosisSilicon dioxideIndoor air pollution in developing nations: Indoor air pollution in developing nations is a significant form of indoor air pollution (IAP) that is little known to those in the developed world.Biocidal natural building material: A biocidal natural building material is a natural building material which has biocidal properties. The biocidal properties of biocidal natural building materials are inherent to the material, rather than being supplemented afterwards.Allergen immunotherapy: Allergen immunotherapy, also known as desensitization or hypo-sensitization, is a medical treatment for some types of allergies. It is useful for environmental allergies, allergies to insect bites, and asthma.Manual vacuum cleaner: The manual vacuum cleaner was a type of non-electric vacuum cleaner, using suction to remove dirt from carpets, being powered by human muscle, similar in use to a manual lawn mower. Its invention is dated to the second half of the 19th century, when patents were granted to inventors in the United States, England, France, and elsewhere.Doffer: A doffer is someone who removes ("doffs") bobbins, pirns or spindles holding spun fiber such as cotton or wool from a spinning frame and replaces them with empty ones. Historically, spinners, doffers, and sweepers each had separate tasks that were required in the manufacture of spun textiles.Stillwater Mining Company: Stillwater Mining Company () is a palladium and platinum mining company with headquarters located at Billings, Montana, United States. It is the only palladium and platinum producer in the USA.Briquette: A briquette (or briquet) is a compressed block of coal dust"briquette, n. 2.Pyroglyphidae: Pyroglyphidae is a family of mites. It includes the house dust mite.High-speed door: High-speed doors are door systems, mainly used in industrial applications. They are technical enhancements of the generally known sectional doors, PVC fabric doors or roller shutters.National Healthy Homes Hero Award: National Healthy Homes Hero Award is an award presented by a consortium of agencies at the United States' National Healthy Homes Conference. The first year this award was presented was in 2011.SilicosisUnifine mill: A Unifine mill is a single one-pass impact milling system which produces ultrafine-milled whole-grain wheat flour that requires no grain pre-treatment and no screening of the flour. Like the grist or stone mills that had dominated the flour industry for centuries, the bran, germ, and endosperm elements of grain are processed into a nutritious whole wheat flour in one step.Pocket petMango (software)Gossypium herbaceum: Gossypium herbaceum, commonly known as Levant cotton, is a species of cotton native to the semi-arid regions of sub-Saharan Africa and Arabia where it still grows in the wild as a perennial shrub. It is a sister-species of Gossypium arboreum.Mopani Copper MineBresle methodExhaust systemTechnical textile: A technical textile is a textile product manufactured for non-aesthetic purposes, where function is the primary criterion. Technical textiles include textiles for automotive applications, medical textiles (e.Coulter counter: 150px|thumb|right|The tip of the Coulter counter in a buffer solution, counting cells in solution.Hands of a Working Man: "Hands of a Working Man" is a song written by D. Vincent Williams and Jim Collins, and recorded by American country music artist Ty Herndon.P-AnisidineChondrule: Chondrules in the chondrite Grassland|200px|thumb|Chondrules in the chondrite Grassland. A millimeter scale is shown.Asbestos: Asbestos (pronounced or ) is a set of six naturally occurring silicate minerals, which all have in common their eponymous asbestiform habit: long (roughly 1:20 aspect ratio), thin fibrous crystals, with each visible fiber composed of millions of microscopic "fibrils" that can be released by abrasion and other processes. They are commonly known by their colors, as blue asbestos, brown asbestos, white asbestos, and green asbestos.Metallurgy: Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. Metallurgy is also the technology of metals: the way in which science is applied to the production of metals, and the engineering of metal components for usage in products for consumers and manufacturers.Swiss Institute of Allergy and Asthma Research: Swiss Institute of Allergy and Asthma Research (SIAF), founded in 1988, performs basic research in the field of allergy and asthma with the aim to improve the understanding and treatment of these conditions, which affect around 30-40% of the westernized population. The Institute has its roots in the Tuberculosis Research Institute of Davos, a medical society founded in 1905 to study the beneficial effects of high altitude treatment of tuberculosis.Chrysotile: (SiO)(OH)(ideal)Breathing tube (breathing apparatus): A breathing tube is a flexible tube for breathing through, as part of a scuba set or other breathing apparatus or a medical oxygen apparatus or anaesthetic apparatus (Here they are distinguished from the medium-pressure hoses which are often found as parts of modern breathing apparatus.)
(1/1985) Post-shift changes in pulmonary function in a cement factory in eastern Saudi Arabia.
This cross-sectional study was conducted in 1992 in the oldest of three Portland cement producing factories in Eastern Saudi Arabia. The respirable dust level was in excess of the recommended ACGIH level in all sections. Spirometry was done for 149 cement workers and 348 controls, using a Vitalograph spirometer. FEV1, FVC, FEV1/FVC% and FEF25-75% were calculated and corrected to BTPS. A significantly higher post-shift reduction FEV1, FEV1/FVC% and FEF25-75% was observed in the exposed subjects. Multiple regression analysis showed a significant relationship between post-shift changes and exposure to cement dust but failed to support any relationship with smoking. These findings may indicate an increase in the bronchial muscle tone leading to some degree of bronchoconstriction as a result of an irritant effect induced by the acute exposure to cement dust. (+info)
(2/1985) Asthma visits to emergency rooms and soybean unloading in the harbors of Valencia and A Coruna, Spain.
Soybean unloading in the harbor of Barcelona, Spain, has been associated with large increases in the numbers of asthma patients treated in emergency departments between 1981 and 1987. In this study, the association between asthma and soybean unloading in two other Spanish cities, Valencia and A Coruna, was assessed. Asthma admissions were retrospectively identified for the period 1993-1995, and harbor activities were investigated in each location. Two approaches were used to assess the association between asthma and soybean unloading: One used unusual asthma days (days with an unusually high number of emergency room asthma visits) as an effect measure, and the other estimated the relative increase in the daily number of emergency room visits by autoregressive Poisson regression, adjusted for meteorologic variables, seasonality, and influenza incidence. No association between unusual asthma days and soya unloading was observed in either Valencia or A Coruna, except for one particular dock in Valencia. When the association between unloaded products and the daily number of emergency asthma visits was studied, a statistically significant association was observed for unloading of soya husk (relative risk = 1.50, 95% confidence interval 1.16-1.94) and soybeans (relative risk = 1.31, 95% confidence interval 1.08-1.59) in A Coruna. In Valencia, a statistical association was found only for the unloading of soybeans at two particular docks. Although these findings support the notion that asthma outbreaks are not a common hidden condition in most harbors where soybeans are unloaded, the weak associations reported are likely to be causal. Therefore, appropriate control measures should be implemented to avoid soybean dust emissions, particularly in harbors with populations living in the vicinity. (+info)
(3/1985) Mechanisms and mediators in coal dust induced toxicity: a review.
Chronic inhalation of coal dust can cause several lung disorders, including simple coal workers pneumoconiosis (CWP), progressive massive fibrosis (PMF), chronic bronchitis, lung function loss, and emphysema. This review focuses on the cellular actions and interactions of key inflammatory cells and target cells in coal dust toxicity and related lung disorders, i.e. macrophages and neutrophils, epithelial cells, and fibroblasts. Factors released from or affecting these cells are outlined in separate sections, i.e. (1) reactive oxygen species (ROS) and related antioxidant protection mechanisms, and (2) cytokines, growth factors and related proteins. Furthermore, (3) components of the extracellular matrix (ECM), including the modifying role of ROS, cytokines, proteases and antiproteases are discussed in relation to tissue damage and remodelling in the respiratory tract. It is recognised that inhaled coal dust particles are important non-cellular and cellular sources of ROS in the lung, and may be significantly involved in the damage of lung target cells as well as important macromolecules including alpha-1-antitrypsin and DNA. In vitro and in vivo studies with coal dusts showed the up-regulation of important leukocyte recruiting factors, e.g. Leukotriene-B4 (LTB4), Platelet Derived Growth Factor (PDGF), Monocyte Chemotactic Protein-1 (MCP-1), and Tumor Necrosis Factor-alpha (TNF alpha), as well as the neutrophil adhesion factor Intercellular Adhesion Molecule-1 (ICAM-1). Coal dust particles are also known to stimulate the (macrophage) production of various factors with potential capacity to modulate lung cells and/or extracellular matrix, including O2-., H2O2, and NO, fibroblast chemoattractants (e.g. Transforming Growth Factor-beta (TGF beta), PDGF, and fibronectin) and a number of factors that have been shown to stimulate and/or inhibit fibroblast growth or collagen production such as (TNF alpha, TGF beta, PDGF, Insulin Like Growth Factor, and Prostaglandin-E2). Further studies are needed to clarify the in vivo kinetics and relative impact of these factors. (+info)
(4/1985) Personal exposure to dust, endotoxin and crystalline silica in California agriculture.
AIMS: The aim of this study was to measure personal exposure to dust, endotoxin and crystalline silica during various agricultural operations in California over a period of one year. METHODS: Ten farms were randomly selected in Yolo and Solano counties and workers were invited to wear personal sampling equipment to measure inhalable and respirable dust levels during various operations. The samples were analysed for endotoxin using the Limulus Amebocyte Lysate assay and crystalline silica content using X-ray diffraction. In total 142 inhalable samples and 144 respirable samples were collected. RESULTS: The measurements showed considerable difference in exposure levels between various operations, in particular for the inhalable fraction of the dust and the endotoxin. Machine harvesting of tree crops (Geometric mean (GM) = 45.1 mg/m3) and vegetables (GM = 7.9 mg/m3), and cleaning of poultry houses (GM = 6.7 mg/m3) showed the highest inhalable dust levels. Cleaning of poultry houses also showed the highest inhalable endotoxin levels (GM = 1861 EU/m3). Respirable dust levels were generally low, except for machine harvesting of tree crops (GM = 2.8 mg/m3) and vegetables (GM = 0.9 mg/m3). Respirable endotoxin levels were also low. For the inhalable dust fraction, levels were reduced considerably when an enclosed cabin was present. The percentage of crystalline silica was overall higher in the respirable dust samples than the inhalable dust samples. CONCLUSIONS: Considerable differences exist in personal exposure levels to dust, endotoxin and crystalline silica during various agricultural operations in California agriculture with some operations showing very high levels. (+info)
(5/1985) Fine particulate air pollution, resuspended road dust and respiratory health among symptomatic children.
The short-term association of particulate air pollution with peak expiratory flow rate (PEF) and respiratory symptoms was examined. Forty-nine children with chronic respiratory symptoms aged 8-13 yrs were followed daily for six weeks in spring, 1995, in Kuopio, Finland. Daily concentrations of particulate material with a 50% cut-off aerodynamic diameter < or = 10 microm and < or = 2.5 microm (PM10 and PM2.5, respectively), black carbon, and the number concentrations of particles from 0.01-10 microm diameter were measured. During the study period, PM10 were mainly resuspended soil and street dust, and the concentration was estimated using aluminum content of PM10 samples. No consistent effect of particles was found as the associations varied by lag. Of the lags examined, only 1-day lagged PM2.5 was statistically significantly associated with morning PEF (beta=-1.06, SE=0.52 (per interquartile increase in pollutant)). Evening PEF was significantly associated with the 1-day lagged number of particles in the size range 0.1-1.0 microm (beta=-1.56, SE=0.72). One-day lagged PM10, PM2.5-10, PM2.5 and resuspended PM10, and 4-day average of PM2.5 were significantly associated with increased risk of cough. Given the short duration of the study, separating the effects of different types of particles was difficult. The present study demonstrates the highly variable size and number distribution and chemical composition of particles in Finland, and underlines the importance of measuring the size and chemical composition of particles to determine which types of particles are associated with health effects. (+info)
(6/1985) Contributory and exacerbating roles of gaseous ammonia and organic dust in the etiology of atrophic rhinitis.
Pigs reared commercially indoors are exposed to air heavily contaminated with particulate and gaseous pollutants. Epidemiological surveys have shown an association between the levels of these pollutants and the severity of lesions associated with the upper respiratory tract disease of swine atrophic rhinitis. This study investigated the role of aerial pollutants in the etiology of atrophic rhinitis induced by Pasteurella multocida. Forty, 1-week-old Large White piglets were weaned and divided into eight groups designated A to H. The groups were housed in Rochester exposure chambers and continuously exposed to the following pollutants: ovalbumin (groups A and B), ammonia (groups C and D), ovalbumin plus ammonia (groups E and F), and unpolluted air (groups G and H). The concentrations of pollutants used were 20 mg m-3 total mass and 5 mg m-3 respirable mass for ovalbumin dust and 50 ppm for ammonia. One week after exposure commenced, the pigs in groups A, C, E, and G were infected with P. multocida type D by intranasal inoculation. After 4 weeks of exposure to pollutants, the pigs were killed and the extent of turbinate atrophy was assessed with a morphometric index (MI). Control pigs kept in clean air and not inoculated with P. multocida (group H) had normal turbinate morphology with a mean MI of 41.12% (standard deviation [SD], +/- 1. 59%). In contrast, exposure to pollutants in the absence of P. multocida (groups B, D, and F) induced mild turbinate atrophy with mean MIs of 49.65% (SD, +/-1.96%), 51.04% (SD, +/-2.06%), and 49.88% (SD, +/-3.51%), respectively. A similar level of atrophy was also evoked by inoculation with P. multocida in the absence of pollutants (group G), giving a mean MI of 50.77% (SD, +/-2.07%). However, when P. multocida inoculation was combined with pollutant exposure (groups A, C, and E) moderate to severe turbinate atrophy occurred with mean MIs of 64.93% (SD, +/-4.64%), 59.18% (SD, +/-2.79%), and 73.30% (SD, +/-3.19%), respectively. The severity of atrophy was greatest in pigs exposed simultaneously to dust and ammonia. At the end of the exposure period, higher numbers of P. multocida bacteria were isolated from the tonsils than from the nasal membrane, per gram of tissue. The severity of turbinate atrophy in inoculated pigs was proportional to the number of P. multocida bacteria isolated from tonsils (r2 = 0.909, P < 0.05) and nasal membrane (r2 = 0.628, P < 0.05). These findings indicate that aerial pollutants contribute to the severity of lesions associated with atrophic rhinitis by facilitating colonization of the pig's upper respiratory tract by P. multocida and also by directly evoking mild atrophy. (+info)
(7/1985) Evidence for suppressed activity of the transcription factor NFAT1 at its proximal binding element P0 in the IL-4 promoter associated with enhanced IL-4 gene transcription in T cells of atopic patients.
Allergen-specific T cells in atopic patients are polarized IL-4-producing Th2 cells, promoting IgE synthesis by B cells. The molecular basis for increased IL-4 gene expression in atopy is not fully understood. IL-4 gene regulation in general involves the nuclear factor of activated T cells (NFAT) family of transcription factors, of which NFAT1 and NFAT2 are most prominent in peripheral T cells. Recently, a unique inhibitory role of NFAT1 in IL-4 gene control was shown in the mouse. In a series of electrophoretic mobility shift assays with protein extracts of highly polarized Th2 clones from atopics and Th1 clones from controls we compared DNA-binding activities at the two NFAT-binding elements P0 and P1 of the crucial proximal human IL-4 promoter. At the most proximal P0 site, NFAT-containing complexes devoid of NFAT2 were readily inducible in the Th1 clones, but hardly or not in the Th2 clones. In contrast, both in Th1 and Th2 clones NFAT-containing complexes were strongly inducible at the P1 site, consisting of NFAT2 and a P0-compatible NFAT activity, without apparent differences between Th1 and Th2 clones. Like in Th2 clones, suppressed NFAT-P0 complex formation was observed also at the polyclonal level in peripheral blood mononuclear cells (PBMC) of three of five severe atopic dermatitis patients with strongly elevated serum IgE levels, but not in control PBMC. These findings suggest that high-level IL-4 production in atopic Th2 cells is associated with selective reduction of suppressive NFAT1 activity at the IL-4 P0 element and that some patients with this multifactorial disease may have a putative systemic disorder at this level. (+info)
(8/1985) High concentrations of heavy metals in neighborhoods near ore smelters in northern Mexico.
In developing countries, rapid industrialization without environmental controls has resulted in heavy metal contamination of communities. We hypothesized that residential neighborhoods located near ore industries in three northern Mexican cities would be heavily polluted with multiple contaminants (arsenic, cadmium, and lead) and that these sites would be point sources for the heavy metals. To evaluate these hypotheses, we obtained samples of roadside surface dust from residential neighborhoods within 2 m of metal smelters [Torreon (n = 19)] and Chihuahua (n = 19)] and a metal refinery [Monterrey (n = 23)]. Heavy metal concentrations in dust were mapped with respect to distance from the industrial sites. Correlation between dust metal concentration and distance was estimated with least-squares regression using log-transformed data. Median dust arsenic, cadmium, and lead concentrations were 32, 10, and 277 microg/g, respectively, in Chihuahua; 42, 2, and 467 microg/g, respectively, in Monterrey, and 113, 112, and 2,448 microg/g, respectively, in Torreon. Dust concentrations of all heavy metals were significantly higher around the active smelter in Torreon, where more than 90% of samples exceeded Superfund cleanup goals. At all sites, dust concentrations were inversely related to distance from the industrial source, implicating these industries as the likely source of the contamination. We concluded that residential neighborhoods around metal smelting and refining sites in these three cities are contaminated by heavy metals at concentrations likely to pose a health threat to people living nearby. Evaluations of human exposure near these sites should be conducted. Because multiple heavy metal pollutants may exist near smelter sites, researchers should avoid attributing toxicity to one heavy metal unless others have been measured and shown not to coexist. (+info)
- Angel Dust (banda) - banda de power metal alemã. (wikipedia.org)
- Eatin' Dust é o sexto álbum de estúdio da banda de stoner rock californiana Fu Manchu, lançado em 1999 pela hoje falida gravadora, Man's Ruin Records. (wikipedia.org)
- Diesel and Dust é o sexto álbum da banda australiana de rock Midnight Oil, lançado em 1987. (wikipedia.org)
- Exit Planet Dust é o álbum de estreia da banda britânica de música eletrônica The Chemical Brothers, lançado no Reino Unido em 26 de junho de 1995 e nos Estados Unidos em 15 de agosto do mesmo ano. (wikipedia.org)
- Asthmatics and others with dust mite allergies often implement strategies to avoid dust mite exposure, but lack objective evidence that their efforts are successful in reducing dust mite populations. (nih.gov)
- Awareness, Good Housekeeping EssentialBest practices to avoid dust accumulation include being constantly aware of potential hazards and implementing a good housekeeping program.A thorough hazard assessment is important in identifying and eliminating factors contributing to an explosion, according to OSHA. (shrm.org)
- At least one of the two bedroom surfaces must have Group 2 dust mite allergen levels of greater than or equal to 2 microliter/g with the ELISA test AND greater than or equal to 2 microliter/g on at least one of the two Mite-T-Fast tests for inclusion. (nih.gov)
- Remember that vacuums and other electrical equipment will need to be sparkproof if used in dusty locations.Other general housekeeping tips include:Never use compressed air, dry sweeping or other cleaning methods that disperse combustible dust into the air.Maintain an effective housekeeping program to prevent or eliminate dust buildup on ledges, ductwork, building framing or other surfaces. (shrm.org)
- Discover a unique Modern God game where nature is the star: From Dust, the latest original concept by Eric Chahi, visionary creator of Another World. (xbox.com)
- This isn't just "another one bites the dust," it's one of the classic rock outlet's true "keeper of the keys" getting locked out, no longer to share his small insights and big picture perspective, or what veteran reporters like to call our "institutional knowledge. (philly.com)
- If the people closest to the source of the hazard are trained to recognize and prevent hazards associated with combustible dust in the plant, they can be instrumental in recognizing unsafe conditions, taking preventative action and alerting management," the agency said.Training staff on best practices for cleaning and removing dust from industrial locations is another best practice for mitigating dust-related problems, according to OSHA. (shrm.org)
- Recently developed in-home test kits have introduced the capability to monitor the effectiveness of allergen reduction strategies by providing an affordable, simple way to measure dust mite allergens on a regular basis. (nih.gov)
- The dust-collecting "housekeeping" measure was poorly designed and "doomed to be plugged within days of startup," according to the CSB.The agency has long recommended that the Occupational Safety and Health Administration (OSHA) issue a national general industry combustible dust standard. (shrm.org)
- Sensitization to dust mite allergens is a major risk factor for the development and exacerbation of asthma. (nih.gov)
- Fires and explosions fueled by combustible dusts have long been recognized as a major industrial hazard. (shrm.org)
- DUST presents an evening of original works from four Seattle-based artists. (brownpapertickets.com)
- Participants are given materials on how to reduce dust mite allergens in their home. (nih.gov)
- Study staff visit participants' homes three times over a 12-month period to ask questions about the home, home cleaning habits, and participants' experiences with home test kits (see below) for measuring dust mite allergen. (nih.gov)
- At each visit, staff collect dust samples from the child's bedroom, the parents' bedroom, and the living room. (nih.gov)
- Dust mites are common anywhere there is dust, such as in carpeting and beds. (nih.gov)
- People who live in the Research Triangle Park area of North Carolina who have a child between 5 and 15 years old with a dust mite allergy or sensitivity may be eligible for this study. (nih.gov)
- This study will determine whether use of an in-home test kit results in decreased dust mite allergen levels in homes of children who are sensitive or allergic to dust mites. (nih.gov)
- The dust samples are analyzed in the laboratory for dust mite allergens and the results are given to the participants at the end of the study. (nih.gov)
- These results suggest that a significant fraction of TOC and TN in cloud and rainwater is associated to airborne particulate matter present in dust. (upenn.edu)
- The ion chromatography results showed that the ionic specieswere predominantly of marine origin, for air masses with and without African dust influence, with cloud water concentrations of NO3 and NH4 þ much lower than from polluted areas in the US. (upenn.edu)