Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
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 found in the work area. They are usually produced by the specific nature of the occupation.
Family of house dust mites, in the superfamily Analgoidea, order Astigmata. They include the genera Dermatophagoides and Euroglyphus.
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.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)
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.
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.
The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.
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.
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.
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.
The contamination of indoor air.
Supplies used in building.
Antigen-type substances that produce immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).
The surface of a structure upon which one stands or walks.
The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed)
A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.
Species of European house dust mite, in the family PYROGLYPHIDAE. It is the most commonly found house dust mite.
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.
The presence of bacteria, viruses, and fungi in the air. This term is not restricted to pathogenic organisms.
Living facilities for humans.
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.
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.
Species of American house dust mite, in the family PYROGLYPHIDAE.
Ground up seed of WHEAT.
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.
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.
The planning of the furnishings and decorations of an architectural interior.
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.
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).
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)
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.
Diseases of the respiratory system in general or unspecified or for a specific respiratory disease not available.
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)
Relating to the size of solids.
The care and management of property.
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.
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. 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.
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)
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).
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)
Respirators to protect individuals from breathing air contaminated with harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors.
Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass the particulates. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A space in which the pressure is far below atmospheric pressure so that the remaining gases do not affect processes being carried on in the space.
The application of smoke, vapor, or gas for the purpose of disinfecting or destroying pests or microorganisms.
Flat keratinous structures found on the skin surface of birds. Feathers are made partly of a hollow shaft fringed with barbs. They constitute the plumage.

Post-shift changes in pulmonary function in a cement factory in eastern Saudi Arabia. (1/1985)

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)

Asthma visits to emergency rooms and soybean unloading in the harbors of Valencia and A Coruna, Spain. (2/1985)

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)

Mechanisms and mediators in coal dust induced toxicity: a review. (3/1985)

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)

Personal exposure to dust, endotoxin and crystalline silica in California agriculture. (4/1985)

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)

Fine particulate air pollution, resuspended road dust and respiratory health among symptomatic children. (5/1985)

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)

Contributory and exacerbating roles of gaseous ammonia and organic dust in the etiology of atrophic rhinitis. (6/1985)

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)

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. (7/1985)

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)

High concentrations of heavy metals in neighborhoods near ore smelters in northern Mexico. (8/1985)

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)

Lung function is a predictor of morbidity and mortality, and the chronic nature of lung function decline allows for preventive initiatives. Proinflammatory constituents of organic dust are considered a possible cause of compromised respiratory health. The aim of this systematic review was to reveal the impact of organic dust exposure on long-term change in lung function. The literature search was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria. Predefined criteria concerned study design: longitudinal, ≥1 year follow-up, ≥50 exposed; exposure measures: organic dust, measured or estimated, in different occupational settings; and outcome measures: change in lung function measured by spirometry. Based on these criteria, 1580 potentially relevant publications were narrowed down to 20 included publications. Quality was evaluated and discussed based on six objectively defined criteria. Overall, 14 studies found some type of association ...
TY - JOUR. T1 - Insufficient zinc intake enhances lung inflammation in response to agricultural organic dust exposure. AU - Knoell, Daren L.. AU - Smith, Deandra A.. AU - Sapkota, Muna. AU - Heires, Art J.. AU - Hanson, Corrine K.. AU - Smith, Lynette M.. AU - Poole, Jill A.. AU - Wyatt, Todd A.. AU - Romberger, Debra J.. PY - 2019/8. Y1 - 2019/8. N2 - Organic dust exposure particularly within hog confinement facilities is a significant cause of airway inflammation and lung disease. In a cohort of Midwestern veterans with COPD and agricultural work exposure we observed reduced zinc intakes which were associated with decreased lung function. Because insufficient zinc intake is common within the U.S. and a potent modulator of innate immune function, we sought to determine whether deficits in zinc intake would impact the airway inflammatory response to hog confinement facility dust extract (HDE). Adult male C57BL/6 mice were randomized to zinc deficient or matched zinc sufficient diets for 3 weeks ...
TY - JOUR. T1 - Granulocyte aggregating activity in sera of workers exposed to textile dust inhalation. AU - Varga, L.. AU - Dervaderics, M.. AU - Zsiray, M.. AU - Kárpáthy, J.. AU - Füst, G.. PY - 1986/12/1. Y1 - 1986/12/1. N2 - The object of the present study was to determine the effects of controlled cotton dust exposure on the in vivo complement activation (C3), on the C5a-induced GAA, and on the level of circulating immune complexes (CIC) in the serum samples from textile workers and control subjects. A weak but well measurable GAA was found in most textile workers tested, which was significantly increased after textile dust inhalation. An association was found between complaints and objectives disorders of respiratory functions on the one hand and the GAA on the other hand, indicating a possible role of complement activation in the development of respiratory distress in textile workers.. AB - The object of the present study was to determine the effects of controlled cotton dust exposure ...
Cotton dust is defined as dust present in the air during the handling or processing of cotton which may contain a mixture of many substances including ground up plant matter, fiber, bacteria, fungi, soil, pesticides Inhalable Dust, Thoracic Dust and Respirable Dust are types of the dust. - 3
Dust control is the suppression of solid particles with diameters less than 500 micrometers. Dust poses a health threat to children,[12] older people, and those with respiratory illnesses.. House dust can become airborne easily. Care is required when removing dust to avoid causing the dust to become airborne. A feather duster tends to agitate the dust so it lands elsewhere. Products like Pledge and Swiffer are specifically made for removing dust by trapping it with sticky chemicals.. Certified HEPA (tested to MIL STD 282) can effectively trap 99.97% of dust at 0.3 micrometers. Not all HEPA (type/media) filters can effectively stop dust; while vacuum cleaners with HEPA (type/media) filters, water, or cyclones may filter more effectively than without, they may still exhaust millions of particles per cubic foot of air circulated. Central vacuum cleaners can be effective in removing dust, especially if they are exhausted directly to the outdoors.. Air filtering appliances differ greatly in their ...
The United States National Institute for Occupational Safety and Health, through an informal partnership with industry, labor, and the United States Mine Safety and Health Administration, has developed and tested a new instrument known as the Personal Dust Monitor (PDM). The new dust monitor is an integral part of the cap lamp that coal miners normally carry to work and provides continuous information about the concentration of respirable coal mine dust within the breathing zone of that individual. Previous laboratory testing demonstrated that there is a 95% confidence that greater than 95% of individual PDM measurements fall within ± 25% of reference measurements. The work presented in this paper focuses on the relationship between the PDM and respirable dust concentrations currently measured by a coal mine dust personal sampler unit utilizing a 10 mm Dorr-Oliver nylon cyclone. The United Kingdom Mining Research Establishment instrument, used as the basis for coal mine respirable dust ...
Aeolian dust is primarily found in arid and semi-arid regions. When ascending air stream occurs in these regions, bacterial cells on dust particles can be lifted and transported over long distances by air currents. In Japan where from 3,000 to 5,000 km away from Aeolian dust source regions, about 4 million tons of Asian dust particles are estimated to be fallen out each year. Therefore, it is necessary to assess bacterial impact by Asian dust, and which requires accurate understanding of variations of the bacterial abundance and bacterial community structure under diverse conditions in non-Asian dust days. In this study, we estimated variation of airborne bacterial abundance and bacterial community structure on both Asian dust days and non-Asian dust days for a long term, including four seasons in outdoor environment. We sampled aerosol particles from May 2013 to Apr. 2015 (total 44 times). Bacterial abundance and community structure were determined with 16S rRNA gene targeted qPCR and ...
For researches on toxic chemicals in settled indoor dust, selection of dust fraction is a critical influencing factor to the accuracy of human exposure risk assessment results. However, analysis of the selection of dust fraction in recent studies revealed that there is no consensus. This study classified and presented researches on distribution of toxic chemicals according to dust particle size and on relationship between dust particle size and human exposure possibility. According to the literature, beyond the fact that there were no consistent conclusions on particle size distribution of adherent fraction, dust with particle size less than 100 mu m should be paid more attention and that larger than 250 mu m is neither adherent nor proper for human exposure risk assessment. Calculation results based on literature data show that with different selections of dust fractions, analytical results of toxic chemicals would vary up to 10-fold, which means that selecting dust fractions arbitrarily will ...
This manual provides guidance for dust control methods and materials that can be used successfully at airfields and heliports to stop dust from forming naturally or as a result of mans activities and to control dust in areas directly impacted by mans activities. Dust develops naturally in denuded or sparsely vegetated areas and in most unpaved, sparsely vegetated areas occupied by man. (Mans activities may be detrimental to existing vegetation and create a dust problem.) Dust is created in unsurfaced areas subjected to concentrated foot or vehicular traffic, and is usually a problem on shoulders of surfaced airport and heliport traffic areas. Dust control becomes desirable when man needs to occupy land areas adjacent to the dust producing areas or is required to conceal military activities. The control of dust is also an important factor to consider for lengthening the life of vehicles and their engines.. ...
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. The Sahara Desert is the major source of mineral dust, which subsequently spreads across the Mediterranean (where is the origin of rain dust) and Caribbean seas into northern South America, Central America, North America, and Europe. Additionally, it plays a significant role in the nutrient inflow to the Amazon rainforest. The Gobi Desert is another source of dust in the atmosphere, which affects eastern Asia and western North America. Mineral dust is mainly constituted of the oxides (SiO2, Al2O3, FeO, Fe2O3, CaO, and others) and carbonates (CaCO3, MgCO3) that constitute the Earths crust. Global mineral dust emissions are estimated at 1000-5000 millions of tons per year, of which the largest part is attributed to deserts. Although this aerosol class is ...
Respiratory Symptoms and Diminished Lung Functions Associated with Occupational Dust Exposure Among Iron Ore Mine Workers in Iran
Abstract. At present, the air environment in China is characterized by complex pollution. In this paper, the pollutant sources, transport paths and aerosol optical properties during the dust pollution was conducted to analyse based on ground-based lidar, space-borne sensor and atmospheric transmission model. Firstly, the NMMB/BSC-Dust model, the VIIRS-Suomi NPP date and HYSPLIT were carried out to analyse the dust transport paths and the dust particle size, and then the concentration of particles was analysed. Finally, the optical properties of aerosol particles in the dust weather were studied. During the formation of this weather, there is high dust in the Gobi and Taklamakan deserts. With the influence of wind direction, the dust moves from north to south, and the dust load significantly increased in southern China. Dust at the low altitude is generally transported from the Taklamakan Desert, while dust at the high altitude is generally transported from the Gobi Desert. The hourly average ...
When the project timeline ended, an Institutional Review Board (IRB) protocol was successfully completed granting permission to conduct the aforementioned research. However, research could not begin until the new dust rule, Lowering Miners Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors, passed on May 1, 2014 (79 FR 24813). Under this new rule, the dust level may not exceed 1.5 mg/m3. Additionally, the rule requires mine operators to use continuous personal dust monitors (CPDMs) by February 1, 2016, for designated occupations (DO) to better monitor and comply with regulatory exposures.. Because this date occurred well after the project was ending, this effort was rolled into a new project, An Analysis of Health and Safety Management Practices through Multilevel Interventions, to further test and evaluate the intervention framework. Within this project, a task is written to involve miners in interpreting feedback from their CPDMs with the hope of decreasing ...
Several work environments have the potential for organic dust exposure including agricultural fields, grain handling and storage areas, animal confinement areas, and dairy barns. Grain handling and storage has been associated with respiratory symptoms and illnesses (such as chronic cough, sputum production, chronic bronchitis, grain fever (organic dust toxic syndrome), and nasal and skin irritation in exposed workers. Similar findings were found in several global areas. Grain elevator workers frequently report symptoms such as cough, sputum production, wheezing, and dyspnea, and have obstructive or restrictive impairments on pulmonary function testing. Respiratory symptoms and worsening of ventilatory function have also been reported with workers exposed to dusts from soybeans and burned rice husk in rice farmers. Growing crops such as rice, soybeans, and flowers has been associated with lung disease (32-43).. Work in dairy barns is also related to respiratory illness. Hay and preserved grasses ...
Associations between house dust-associated beta-(1,3)-glucan exposure and airway inflammatory reactions have been reported, while such exposures in early childhood have been suggested to protect against asthma and wheezing. Most epidemiological studies have used reservoir dust samples and an inhibition enzyme immunoassay (EIA) for beta-(1,3)-glucan exposure assessment. The objective of this ... read more study was to develop inexpensive but highly sensitive enzyme immunoassays to measure airborne beta-(1,3)-glucans in low-exposure environments, like homes. Specificities of available anti-beta-(1,3)-glucan antibodies were defined by direct and inhibition experiments. Three suitable antibody combinations were selected for sandwich EIAs. beta-(1,3)-Glucans in passive airborne dust collected with an electrostatic dust fall collector (EDC) and floor dust from seven homes were measured with the three EIAs. Floor dust samples were additionally analyzed in the inhibition EIA. The sandwich EIAs were ...
We evaluate why water sucks for dust control, what can make water for dust control and cement the discussion with a case for drill and blast dust control.
OSHA cites Thomas Moore Feed of Navasota, Texas, for 18 violations. HOUSTON - Combustible dust left uncontrolled or suspended in the air can explode, which was one of many safety hazards discovered after an inspection at the Thomas Moore Feed facility in Navasota, Texas, by the U.S. Department of Labors Occupational Safety and Health Administration. OSHA inspectors found 18 violations and proposed a penalty of $58,100.. The agencys Houston North Area Office did its inspection in September 2014 following a complaint. OSHA cited Thomas Moore Feed for not protecting workers from a potential dust explosion; allowing openings in the dust collection exhaust path of the hammer mill; failing to keep dust accumulations below 1/8 inch in a priority area; not maintaining a functioning monitoring device on the dust collector or making repairs to the dust collector; and not having an adequate dust emission source. Airborne grain dust in the right concentration can become explosive and must be properly ...
Global measurements of the elemental composition of fine particulate matter across several urban locations by the Surface Particulate Matter Network reveal an enhanced fraction of anthropogenic dust compared to natural dust sources, especially over Asia. We develop a global simulation of anthropogenic fugitive, combustion, and industrial dust which, to our knowledge, is partially missing or strongly underrepresented in global models. We estimate 2-16 μg/m3 increase in fine particulate mass concentration across East and South Asia by including anthropogenic fugitive, combustion, and industrial dust emissions. A simulation including anthropogenic fugitive, combustion, and industrial dust emissions increases the correlation from 0.06 to 0.66 of simulated fine dust in comparison with Surface Particulate Matter Network measurements at 13 globally dispersed locations, and reduces the low bias by 10% in total fine particulate mass in comparison with global in situ observations. Global ...
In December 1995 we took dust samples from nine pairs of pillows and analysed them for Der p I. Each pair consisted of one feather filled pillow and one filled with polyester fibre; these had been used together on the same adult bed for more than six months to ensure that the environmental exposures of the pillows in each pair were similar. The pillow fillings were encased in closely woven cotton fabric. Two of the subjects in our study slept with the polyester filled pillow on top, four with the feather filled pillow on top, and three had no preference. We took dust samples with a portable Hitachi CV-2500 vacuum cleaner with a sock attachment, vacuuming each pillow for three minutes on each side, a total of six minutes per pillow. We sieved the dust collected to remove fluff and large particles and weighed the resulting fine dust. We then analysed this dust for Der p I content using monoclonal antibody enzyme linked immunosorbent assay (ELISA).2 The between batch coefficient of variation of the ...
Organic dust consists of particles with a biological origin. Airborne levels of bacteria, fungi, endotoxins, and glucans have been investigated in epidemiological studies of mucous membrane irritation, inflammation, and airway obstruction. Organic dust can be measured by gravimetry of filter samples. Microorganisms can be quantified by culture, microscopic, and DNA-based methods. Culture methods underestimate microbial exposure and have poor precision. However, high sensitivity and identification of species that indicate fungal contamination have advantages in indoor air studies. Microscopic and DNA-based methods quantify microorganisms independent of cultivability. Specific organisms can even be quantified with molecular techniques. Quantification of specific organic dust components is preferred to dust levels. However, no occupational exposure limits exist for specific agents, although criteria for endotoxin and fungal spores have been proposed. In exposure assessments of microbial agents, ...
Amazonom: Dustick Duster (with 21-foot reach) by ...- carpenter bee dust insecticide applicator ,Purchased this product a little over a year ago to treat carpenter bee holes. Although the duster worked as advertised, after a year, it started leaking the insecticide dust from the top of the reservoir. As much dust now comes from this seam as goes out the end of the applicator…Puffer Hand Duster , J.T.Eaton Duster #530 Bellow DusterBellow Bulb Hand Duster is a perfect duster for small dusting applications. This bellow duster has a spring that is compressed in order to release the dust. This duster will hold between 4 oz to 8 oz of dry dust. It would depend on the dry weight of the dust. Has a rod for easy cleaning. Can be held upright, or inverted for better dust dispersion. Fill the bellow duster half way with a dust ...
Background: There is inconclusive evidence concerning cancer risks of organic dusts. Aim: The carcinogenic exposures are mainly inhalatory and the authors therefore studied associations between occupational exposure to eight different organic dusts and respiratory cancers in Finland. Methods: The authors followed up a cohort of all economically active Finns born between 1906 and 1945 for 30 million person-years during 1971-95. Incident cases of nasal, laryngeal, and lung cancer and mesotheliomas were identified through a record linkage with the Finnish Cancer Registry. Occupations from the population census in 1970 were converted to exposures to eight organic dusts with a job-exposure matrix (FINJEM). Cumulative exposure (CE) was calculated as a product of prevalence, level, and estimated duration of exposure. Standardised incidence ratios (SIR) and 95% confidence intervals (CI) adjusted for age, period, and social class were calculated for each organic dust using the economically active ...
that construction workers want more emphasis placed on the dangers of construction dust.. More than 600 people working within the construction industry took part in the survey. Of the 600 respondents, 61 per cent were health and safety advisors for the sector.. The survey aimed to shed a light on the health problems surrounding construction dust and how they can be managed.. In the UK, 500 people working within the construction industry die from lung cancers as a result of silica dust. As well as cancer, construction dust can cause other diseases of the lungs such as asthma, silicosis and chronic obstructive pulmonary disorder.. In response to a question about how much of a priority the industry currently makes tackling dangers of construction dust, 44 per cent answered very little. Of the respondents, just 12.5 per cent believed that construction dust was a priority health issue.. As well as a lack of priority, the respondents also identified an inadequate awareness of the risks among ...
Question: How many dust storms have you seen? Do you have memories of a particular storm?. Answer: I see small dust devils pretty often - the conditions here make them possible. Sometimes they look like small tornadoes, a funnel cloud with debris in it. I was in a dust storm in the Sahara once. It came up so fast, we were sitting around after dinner, just relaxing and then we had to jump up and run into the tent. The sand was blowing hard and stinging my skin and eyes. Our Berber guide wrapped up in a blanket and huddled near the tent; he said that it was his tradition to stay outside in it. They had stories of camels and tents being buried by the sand. The storm cleared in a few hours and then the night was beautiful, clear skies full of stars.. Question: What tips do you have to someone that comes face to face with a dust storm?. Answer: Take cover if possible. Try to protect your breathing (wet bandana, dust mask).. Question: What is one thing youve learned (important lesson) that you would ...
The dust particles may not seen with clear eye and may seem harmless at first sight, but the fact is that these are harmful for the respiratory system and lungs of human body, as they cause asthma and various inter-body allergies. Some harmful consequences of dust particles are -. The basic harm caused by the dust particles are asthma and allergies. The intensity of the allergies depends upon the amount of dust inhaled. If these are inhaled deeply, the harm can be chronic. Another factor is the length of exposure to the dust particles. But the main factor to be noticed is the pathway of inhalation. If the dusty air is inhaled by nose, it will start its effect from the nose to the lungs and if it is done by mouth, then your food pipe along with the respiration pipe is in danger.. ...
Dust observations made by GLOBE can help scientists in several ways. Your observations provide direct evidence of a dust storm in your area. Scientists can use YOUR OBSERVATIONS to check if their models have done a good job to predict these dust storms. In addition, your data will be used to verify satellite observations. Dust products from satellites are often compared to other independent data sources, such as ground monitors and aircraft measurements. Your GLOBE observations can be part of the ground truth data set. This is VERY IMPORTANT to help communities prepare and avoid harmful impacts of dust storms. Your observations with scientists help alert or tell students or people with asthma when to stay indoors or even let farmers and ranchers know which days would be better to till their land. Your observations also help warn construction workers when to wear protective equipment to reduce risks of Valley fever infection. Truck drivers can plan their trips to avoid roadblocks and costly ...
Abstract. North African dust reaches the southeast United States every summer. Measurements taken in Miami, Florida indicate that more than one-half of the surface dust mass concentrations reside in particles with diameters less than 2.1 μm, while vertical profiles of micropulse lidar depolarization ratios show dust reaching above four km during pronounced events. These observations are compared to the representation of dust in the MERRA-2 aerosol reanalysis and closely-related GEOS-5 Forward Processing (FP) aerosol product, both of which assimilate satellite-derived aerosol optical depths using a similar protocol and inputs. These capture the day-to-day variability in aerosol optical depth well, in a comparison to an independent sun-photometer-derived aerosol optical depth dataset. Measured near-surface dust mass concentrations slightly exceed model values, with most of the modeled dust mass in diameters between 2-6 μm. Modeled-specified mass extinction efficiencies equate light extinction ...
Results for dust emissions monitor (dust monitoring) equipment from Aloa, AMETEK Land, Codel and other leading brands. Compare and contact a supplier near you ...
Introduction: Exposure to respirable fraction of cement dust and its crystalline silica content is the most important occupational risk factor in cement industries requiring more evaluation and monitoring. This study aimed to assess exposure to crystalline silica and cement dust among workers of a cement industry in Saveh city, Iran. . Material ...
Mix a teaspoon of organic apple cider vinegar in glass water and drink the solution thrice day essentially dip spoon wasabi lick it off to control violent sneezing. It reduces the production of mucus and cleanses bodys lymphatic system to control an allergic reaction. Wasabi, a member of the horseradish family, is pale green paste dust allergy. Top 10 best allergy remedies earth clinic. The dust allergies can effectively be treated with apple cider vinegar apr 26, 2012 is one of the oldest health remedies, dating back to for mites and microscopic crud that make people miserable. Opposite effect releasing once filtered bacteria and dust back into the air. Some basic precautions include avoiding physical interaction with plants, dust and animals. Best home remedies treatment for prevention of dust allergy 7 natural relief allergies 26 proven to get rid. Apple cider vinegar may 28, 2015 get rid of it using home remedies for seasonal allergies. To pollen, dust or food, the warm seasons may ...
The productivity of the Amazon rainforest is constrained by the availability of nutrients, in particular phosphorus (P). Deposition of long-range transported African dust is recognized as a potentially important but poorly quantified source of phosphorus. This study provides a first multiyear satellite-based estimate of dust deposition into the Amazon Basin using three dimensional (3D) aerosol measurements over 2007-2013 from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). The 7-year average of dust deposition into the Amazon Basin is estimated to be 28 (8~48) Tg a -1 or 29 (8~50) kg ha -1 a -1. The dust deposition shows significant interannual variation that is negatively correlated with the prior-year rainfall in the Sahel. The CALIOP-based multi-year mean estimate of dust deposition matches better with estimates from in-situ measurements and model simulations than a previous satellite-based estimate does. The closer agreement benefits from a more realistic geographic definition ...
large image from March 6, 2001 (2200 kb) While the northeastern United States experienced a major snowstorm, northeastern China was hit by yet another major dust storm yesterday and today (March 5 6, 2001). In these Sea-viewing Wide Field-of-view (SeaWiFS) images of the area, clouds (white pixels) can easily be distinguished from the dust (light brown pixels). In the March 5 scene, the heaviest visible concentrations of dust are blowing southeastward from the Gobi Desert, between the Bohai Sea and the Mongolian border. South of the dust storm (in the lower left corner of the image), over the capital city of Beijing, there also appears to be a thick shroud of haze (greyish pixels), possibly from industrial emissions.. The March 6 SeaWiFS image over the region shows the dust storm from the mainland blowing eastward across Korea and Japan, and out into the Pacific Ocean.. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE ...
© 2019 The Author(s) 2019. Published by Oxford University Press. Many workers are daily exposed to occupational agents like gases/fumes, mineral dust or biological dust, which could induce adverse health effects. Epigenetic mechanisms, such as DNA methylation, have been suggested to play a role. We therefore aimed to identify differentially methylated regions (DMRs) upon occupational exposures in never-smokers and investigated if these DMRs associated with gene expression levels. To determine the effects of occupational exposures independent of smoking, 903 never-smokers of the LifeLines cohort study were included. We performed three genome-wide methylation analyses (Illumina 450 K), one per occupational exposure being gases/fumes, mineral dust and biological dust, using robust linear regression adjusted for appropriate confounders. DMRs were identified using comb-p in Python. Results were validated in the Rotterdam Study (233 never-smokers) and methylation-expression associations were assessed using
It is currently difficult to obtain accurate fine dust information in residential areas due to the insufficient number of air quality monitoring systems and spatial imbalances. Therefore, a detailed particulate matter dispersion model including factors such as land use and meteorological information was developed in this study and used to create fine dust concentration distribution maps. The fine dust concentration distribution maps currently available to citizens were compared with those obtained by dispersion modeling, and population distribution data were employed to compare the populations exposed to fine dust according to the two methods. The results of the existing method and the developed particulate matter dispersion model differed significantly. For instance, the PM2.5 concentrations in Daejeon, South Korea, on February 17, 2018, were 56% “Good” and 44% “Moderate,” according to the existing method, while they were 31% “Good,” 26% “Moderate,” 28%
A dust mite allergy is in fact a reaction to proteins in the excretion of the dust mites. Yes, thats right, youre allergic to dust mite poo.. All homes in the UK have dust mites, but due to their tiny size (around 0.25-0.3mm) and translucent bodies they are almost invisible to the naked eye (dont worry - unless you have a dust mite allergy, they are harmless).. When the allergenic proteins are breathed in or make contact with the skin of an allergic person, their body reacts with symptoms - wheezing, sneezing, runny nose and soreness and redness of the skin and eyes.. Dust mites thrive in warm humid environments, our beds being one of their favourite spots. We spend about a third of our day in bed, shedding skin cells and creating moisture with our breath and bodies which the microscopic mites need to live on.. ...
Objectives The inhalation of dust from swine confinement buildings causes inflammatory responses in the airways with a rise of interleukin-6 (IL-6). The purpose of this study was to confirm the increase in serum IL-6 after inhalation of swine dust and investigate a possible increase in plasma fibrinogen.. Methods Eight healthy nonsmoking volunteers inhaled dust for 4 hours inside a swine confinement building. Inhalable dust and endotoxin were sampled. The concentrations of IL-6 and fibrinogen were determined in serum and plasma.. Results The study showed a clear increase in the concentrations of IL-6 and fibrinogen after exposure.. Conclusion As fibrinogen is an important risk factor for ischemic heart disease, the increased concentration of fibrinogen among persons exposed to swine dust may increase the risk for this disease.. ...
The design of pulse injection coal mill explosion proof Dust collector way out dust in pulverized coal dust collecting dust in the process because speed is very easy to create the accumulation, so as to form the hidden danger of accident, a lot of coal dust product in the filter bag with the surface, in order to make is located in the dust collector different locations of the filter bag can ,. Sales Online ...
An overview is given of two new developments in mine atmospheric monitoring. A new personal respirable dust monitor ( PDM) that gives realtime readings is discussed. The unit is mounted within the miners cap lamp battery and internally measures the true particle mass of dust collected on its filter. Samples are available for later mineralogical analysis and results do not exhibit the same sensitivity to water spray as optically based measurement approaches. The technique achieves microgram -level mass resolution even in the hostile mine environment and reports dust loading data on a continuous basis. The monitor has been evaluated under an Australian Coal Association Research Program (ACARP) grant and is being adopted for statutory mine respirable dust determinations in the US. It has particular application for determining high source locations and efficiency of engineering means of suppression and other approaches to handling the problem. It has been recognised that the PDM s unique measurement
Studies have shown that dust bunnies are a mix of dust mites, pet hair, human skin sheds, decomposing insects, food remains, lint, and many other tiny particles. Moreover, dust bunnies can also collect volatile organic compounds from the chemical substances you use around the house, residues from smoking and cooking, as well as a high amount of heavy metals like arsenic and lead. All these particles are extremely dangerous to your health and can become very toxic in case of long-term exposure.. What is extremely dangerous about the dust bunnies is that they are formed in out-of-sight areas so you may not even realize you have them in your home. Although you clean your house regularly and you disinfect it thoroughly, chances are you have dust bunnies in places you can hardly see and reach. Most of the dust bunnies are formed underneath the beds and other pieces of furniture, in the corners of your rooms, on window sills, or between the stairs.. ...
Ventilatory lung functions are reduced during occupational exposure to industrial air pollutants. The degree of functional impairment has a direct relationship with the dust concentration and duration of exposure. Spirometry is a valuable tool to investigate and assess the degree of pulmonary functional impairment caused by occupational dust. Periodic pulmonary function tests help in earlier detection and intervention.. ...
PubMed journal article Sensitization to soybean hull allergens in subjects exposed to different levels of soybean dust inhalation in Argentin were found in PRIME PubMed. Download Prime PubMed App to iPhone or iPad.
OSHA WARNING Dust Inhalation Hazard Safety Sign, Label or Magnet with Symbol. Made in the USA. 6 Sizes. 4 Materials. Easy Ordering. OWE-16787
dust control foggers for stone crushers stone crusher machine. dust prevention for jaw crusher crusher - dust prevention for jaw crusher a crusher is a machine designed to reduce large rocks into smaller rocks,gravel,or rock dust the earliest crushers were hand held stones,where the weight of the stone provided a boost to muscle power,used against a stone anvilhydraulic control system Get Price → ...
Mundtlig præsentation: Inverse associations between occupational organic dust exposure and incidence of chronic obstructive pulmonary disease (COPD) - healthy worker survivor bias? ...
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Abstract. The significant impact of dust deposition on heterotrophic bacterial dynamics in the surface oligotrophic ocean has recently been evidenced. Considering the central role of bacteria in the microbial loop, it is likely that dust deposition also affects the structure and the functioning of the whole microbial food web. In the frame of the DUNE project, aiming to estimate the impact of dust deposition on the oligotrophic Mediterranean Sea through mesocosm experiments, the main goal of the present paper was to assess how two successive dust deposition events affect the dynamics of the microbial food web. The first dust seeding delivered new P and N to the amended mesocosms and resulted in a pronounced stimulation of bacterial respiration. It also induced pronounced, but transient, changes in the bacterial community composition. No significant effects were observed on the abundances of viruses and heterotrophic nanoflagellates. The second dust seeding also delivered new P and N to the ...
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The study was conducted among 92 male workers, divided into two groups depending on workplace and level of inorganic dust containing free crystalline SiO2 in the work environment, and 43 healthy workers without exposure to dust aerosols. The measured inhalable and respirable dust concentrations, as well as the concentration of free crystalline silica (FCS) in the respirable fraction were different for the two groups, but the percentage of free crystalline silica in the respirable fraction was almost identical. Significantly higher neopterin levels were found in workers exposed to dust, compared to the control group: 12.72 nmol/L and 6.32 nmol/L respectively (p,0.05). No significant difference was found between serum neopterin levels in both groups of the exposed workers. Among the groups with different length of service, a statistically higher neopterin level was evident only in the workers with length of service less than 10 years (p,0.05). The correlation analysis did not find a significant ...
A Guide to Occupational Exposure to Wood, Wood Dust and Combustible Dust Hazards Bobby R. Davis Series Editor N. C. Department of Labor Division of Occupational Safety and Health 1101 Mail Service Center Raleigh, NC 27699- 1101 Cherie K. Berry Commissioner of Labor N. C. Department of Labor Occupational Safety and Health Program Cherie K. Berry Commissioner of Labor OSHA State Plan Designee Allen McNeely Deputy Commissioner for Safety and Health Kevin Beauregard Assistant Deputy Commissioner for Safety and Health Acknowledgments A Guide to Wood Dust was originally prepared by Health and Hygiene Inc., whose president, Harold Imbus, M. D., Sc. D., conducted studies about how wood dust affects workers. Dr. Imbuss studies were cited by OSHA in its final rule regarding wood dust. This edition was revised and updated June 2005, incorporating material from several addi-tional sources referenced within the guide. This guide is intended to be consistent with all existing OSHA standards; therefore, if an ...
One study in particular examined dust emission during the cutting of polyurethane-impregnated bandages in a hospital environment.1 When hospital staff removed splinting bandages with a power saw, a large amount of dust was generated. While the PU-impregnated bandage produced a lower airborne dust concentration than other bandage materials, the size and nature of the dust became a concern.. Like all particles, their aerodynamic diameters determine if and for how long they remain airborne, their likelihood of being inhaled, and their site of deposition in the respiratory system [respirable dust].6. In the studys findings, 90% of the particles in the dust cloud generated by the PU-impregnated bandage were considered respirable and contained fragments of PU resin.. In another study, laboratory rodents where exposed by inhalation to polyurethane foam particles (20 mg/m3) for 5 days/week for 6 weeks.2. Early findings showed the particles had deposited in the respiratory bronchi and in the subpleural ...
Abstract. The main objectives of this research were to determine what aerosols were present by taking total dust (TD) samples and thoracic particulate mass samples (TPM) on farms and in grain elevators. Cascade impactors were used to characterize size distribution of dust and endotoxins at each site. Total dust concentrations on farms had a geometric mean 3.4 mg/m3 and 3.3 mg/m3 in elevators. The geometric mean (GM) concentrations for the TPM were 2.4 mg/m3 on farms and 1.0 mg/m3 in elevators. Endotoxin concentrations as geometric means were alarming at 3,175 EU/m3 total dust and 983 EU/m3 by TPM on farms. In elevators, the GM concentrations for endotoxins were 2,534 EU/m3 total dust and 526 EU/m3 by TPM. The mass median aerodynamic diameter (MMAD) for endotoxins on farms was 8.0 mm and 6.5 mm in elevators. The paired t-test was applied to the log radios of endotoxin concentrations (EU/m3) and dust concentrations (mg/m3), for paired samples of the TD and TPM. A higher content of endotoxin was ...
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The high resolution stereo camera on board ESAs Mars Express captured this impressive upwelling front of dust clouds - visible in the right half of the frame - near the north polar ice cap of Mars in April this year.. It was one of several local small-scale dust storms that have been observed in recent months at the Red Planet, which is currently enduring a particularly intense dust storm season. A much larger storm emerged further southwest at the end of May and developed into a global, planet-encircling dust storm within several weeks.. The intensity of this major event means very little light from the Sun reaches the martian surface, a situation extreme enough that NASAs 15-year old Opportunity rover has been unable to recharge its batteries and call home: it has been in hibernation mode since mid-June.. Dust storms on Mars occur regularly during the southern summer season when the planet is closer to the Sun along its elliptical orbit. The enhanced solar illumination causes stronger ...
Best Vacuum Cleaners. We have all used a vacuum cleaner at one point in our lives. We have also seen other people use it to clean either a floor carpet, couches or even a car. This is because of the way they have become an integral part when it comes to indoor cleaning. The first vacuum cleaner was invented in 1869 as a hand pumped cleaner. We have witnessed growth in technology and the vacuum cleaner being made into a high-tech cleaning equipment. Normally, vacuum cleaners have not been made the same way. This is due to the fact that there are different brands in the market that bring about the difference. It is wise for a buyer to consider some of the below factors in determining the best vacuum cleaner. The main factor to look at is the suction power of a vacuum cleaner. Vacuum cleaners have been made to work in a way that the suction works as a result of a built-in motor. A strong motor increases the suction power of a vacuum cleaner thus increasing its effectiveness in dust and dirt ...
Dear colleagues, a dedicated AEROCOM-DUST analysis is a good idea and is quite timely considering the ever-increasing interest in dust aerosol, and I would be happy to contribute. I agree with Michael that some new experiments would be needed, which obviously have to be carefully designed. To have Paul lead a working group on this is great. I suggest to also include Stephanie Woodward from the Hadley Center in this exercise. ([email protected]). After having looked at the WIKI page, here are some additional comments: - What is the best choice for an anthropogenic dust source? While the estimates for total anthropogenic dust contribution to total dust are now considerably lower compared to the IPCC 2001 number, this emission and the geographical distribution is still very uncertain. In addition to direct anthropogenic dust sources as from agricultural soil disturbance it would be nice to have a second order anthropogenic dust source that is caused by anthropogenic climate change, ie ...
Dear colleagues, a dedicated AEROCOM-DUST analysis is a good idea and is quite timely considering the ever-increasing interest in dust aerosol, and I would be happy to contribute. I agree with Michael that some new experiments would be needed, which obviously have to be carefully designed. To have Paul lead a working group on this is great. I suggest to also include Stephanie Woodward from the Hadley Center in this exercise. ([email protected]). After having looked at the WIKI page, here are some additional comments: - What is the best choice for an anthropogenic dust source? While the estimates for total anthropogenic dust contribution to total dust are now considerably lower compared to the IPCC 2001 number, this emission and the geographical distribution is still very uncertain. In addition to direct anthropogenic dust sources as from agricultural soil disturbance it would be nice to have a second order anthropogenic dust source that is caused by anthropogenic climate change, ie ...
A physician will normally direct an individual to take one of the listed medications to help nasal allergy symptoms: Antihistamines. Kill Mites with Low Humidity Natural Treatments for a Dust Allergy. An allergy test can help determine if you are allergic to dust mites. Electrostatic filters may be more effective in filtering out dust, mites and inhalant particles. If tests show that you are allergic to house dust mites, … Users should not, under any circumstances, stop or modify their prescribed dosage on account of the improvement or disappearance of allergic reactions during ALLERBED anti dust mite treatment without first consulting their allergy specialist or the GP who prescribed the medication. They need little water to survive (they absorb it through the air) and live off an endless supply of food that humans and pets produce on a daily basis. Allergy shots dust mites. The best way to prevent an allergic reaction is to avoid the substance that youre allergic to, although this is not ...
Satellite data estimate a high dust deposition flux (approximately 18 g m(exp-2 a(exp-1) into the northern South China Sea (SCS). However, observational evidence concerning any biological response to dust fertilization is sparse. In this study, we combined long-term aerosol and chlorophyll-a (Chl-a) measurements from satellite sensors (MODIS and SeaWiFS) with a 16-year record of dust events from surface PM10 observations to investigate dust transport, flux, and the changes in Chl-a concentration over the northern SCS. Our result revealed that readily identifiable strong dust events over this region, although relatively rare (6 cases since 1994) and accounting for only a small proportion of the total dust deposition (approximately 0.28 g m(exp-2 a(exp-1), do occur and could significantly enhance phytoplankton blooms. Following such events, the Chl-a concentration increased up to 4-fold, and generally doubled the springtime background value (0.15 mg m(exp-3). We suggest these heavy dust events ...
The new HemiPleat® FR Carbon dust collector filter from Camfil Air Pollution Control (APC) is the first to combine flame retardant and conductive properties in a single filter that also offers high efficiency, long service life, and energy-efficient performance. The special carbon-impregnated filtration media is designed for dust-handling applications that require flame resistance as well as dissipation of static charges - including many metal dusts; fumed silica dust; plastic, PVC or composite dusts; pharmaceutical dusts and carbon black/toner dusts. The cartridge filters are especially suited . . .
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Dust builds up throughout your home. The dust may contain substances that trigger asthma symptoms, such as wheezing or coughing, or anotherallergic reaction, such as the rash ofatopic dermatitisor stuffy nose ofallergic rhinitis. These substances are calledallergens.Dust mitesare another example of an allergen.. Although there is no strong evidence that reducing dust and dust mites in your home will reduce symptoms ofasthmaor allergic reactions, the following steps may be helpful.. ...
A steady spike in purchasing power, growing awareness of health and hygiene concerns, and a greater number of women joining the workforce leave precious little time for household chores, fuelling the vacuum cleaner market. The growth of the vacuum dust filter market is directly linked to that of the vacuum cleaner market. Furthermore, continuous innovations in vacuum cleaners coupled with an increasingly tech-savvy population is predicted to benefit the global vacuum dust filter market that is projected to be worth almost US$ 27 million by end 2022.. Get Sample Copy of This Report @ HEPA and Micro Fresh Filters Key in Vacuum Dust Filter Market. The HEPA filters segment comprised roughly a sixth of the global vacuum dust filter market in 2017 but is poised to lose significant market share going forward. The HEPA filter segment is expected to have a value of more than US$ 4 million at the end of the forecast period. The HEPA filters ...
Wood dust is one of the oldest and one of the most common occupational exposures in the world. The present analyses examine the effect of lifetime exposure to wood dust in diverse occupational settings on lung cancer risk. We conducted two population-based case-control studies in Montreal: Study I (1979-1986) included 857 cases and two sets of controls (533 population and 1349 cancer controls), and Study II (1996-2001) comprised 736 cases and 894 population controls. Detailed job histories were obtained by interview and each job was evaluated by expert chemist-hygienists to estimate the likelihood and level of exposure to many substances, one of which was wood dust. Odds ratios (ORs) were computed in relation to different indices of exposure to wood dust, adjusting for several covariates including smoking. Three datasets were analysed: Study I with population controls, Study I with cancer controls, and Study II. The most frequently exposed occupations in our study population were in construction, timber
Dust can be corrosive to eyes, skin, and respiratory tract. Contact can cause severe chemical burns. Avoid breathing dust. Dust can contain silica. Prolonged and repeated breathing of silica dust can cause lung damage and/or cancer. Wear eye, skin and respiratory protection as necessary per working conditions. If eye contact occurs flush immediately with water for 30 minutes. Do not ingest. If ingested, call physician. If cutting board with a power tool, use a wet or vacuum saw to reduce the amount of dust generated. Panels are heavy and can fall over, causing serious injury or death. Avoid creating a tripping hazard and do not exceed floor limit loads. Dust can contain silica. Prolonged and repeated breathing of silica dust can cause lung damage and/or cancer. Product safety information: 800-507-8899 or usg. com. Customer Service: 800 USG-4-YOU (800 874-4968). KEEP OUT OF REACH OF CHILDREN ...
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Fast Shipping. Great Low Price. Prozap Insectrin Permethrin Dust contains 0.25% permethrin. Used for fly and lice control on cattle and horses; lice control on swine; and mite control on poultry. Prozap Insectrin Dust may be used to refill a Dust Bag Kit or may be directly applied to the animal. 0.25% permethrin. Contains 2 x 12.5 lb. refill cartridges.Prozap Insectrin Permethrin Dust Neogen Pour-on, Spray Dust | Cattle Fly Lice | Fly Lice Control |
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The 42-year-old attorney was caught in the dust cloud while fleeing the collapsing towers on Sept. 11, 2001. She died of sarcoidosis, a disease that causes inflammation and scarring in the lungs, on Feb. 10, 2002.. In explaining the reversal, Hirsch cited accumulated scientific research that concluded exposure to trade center dust can cause or contribute to sarcoidosis.. Mrs. Dunn-Jones exposure to World Trade Center dust on 9/11/01 contributed to her death and it has been ruled a homicide, Hirsch wrote. Mrs. Dunn-Jones has now been added to the list of people who died as a result of the collapse of the World Trade Center towers.. The city puts the Sept. 11 death toll at the trade center at 2,750. Dunn-Jones will be listed on the Sept. 11 memorial when it opens in 2009, a spokeswoman for the World Trade Center Memorial Foundation said.. A class-action lawsuit has claimed that dozens of deaths have been caused by exposure to toxic trade center dust.. A study published this month by a Fire ...
Dust mites are a common cause of allergy problems. Dust mites live up to 4 months. Each female can lay 100 eggs. Dust mites eat dead skin flakes and produce waste called fecal pellets. One mite may produce 20 fecal pellets a day. The pellets remain long after the mite is gone. Allergy problems are mainly caused by these fecal pellets. Dust mites like to live in warm, moist places (temperature 20 to 25C, humidity above 50%). Anyone with a dust mite allergy should try to avoid them. This may decrease allergy problems and the need for medicine.. ...
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TY - JOUR. T1 - Inflammation but no DNA (deoxyribonucleic acid) damage in mice exposed to airborne dust from a biofuel plant. AU - Madsen, Anne Mette. AU - Saber, Anne Thoustrup. AU - Nordly, Pernille. AU - Sharma, Anoop Kumar. AU - Wallin, Hakan. AU - Vogel, Ulla Birgitte. PY - 2008. Y1 - 2008. N2 - Objectives Particles in ambient air are associated with such health effects as lung diseases and cancer of the lung. Exposure to bioaerosols has been found to be associated with respiratory symptoms. The toxic properties of exposure to combustion and bioaerosol particles from biofuel plants have not been studied in detail. This study investigated whether exposure to dust from biofuel plants induces DNA (deoxyribonucleic acid) damage and inflammation in exposed mice. Methods DNA damage and inflammation were evaluated in mice exposed through the intratracheal installation of airborne dust collected at a biofuel plant at the straw storage hall and in the boiler room. The mice were given either a single ...
If you want to really get the job done, wash the item in no less than 130 degrees Fahrenheit or 54 degrees Celsius. Additionally, their droppings can result to allergic reactions like coughing, itching, watery eyes, and nasal congestion. No. Mite allergen levels were 1998 Apr;101(4 Pt 1):451-6. doi: 10.1016/S0091-6749(98)70352-5. Features. These little creatures can breed like an unstoppable wildfire spreading across the mountains. Lavender, peppermint, and lemongrass are three of the most effective ones. After this, remember to wash the frozen items to completely remove what is left of these dust mites. The effectiveness of dust mites sprays depends on the active ingredients used and the way you use them. What are the Ingredients of Dust Mites Spray? The control group had the usual house dust mite control measures including the use of vinyl covers for mattresses and pillows while the treatment group had application of benzyl benzoate to mattresses and carpets in the bedroom and the most ...
coal mine dust causes a spectrum of lung diseases collectively termed coal mine these diseases can be distinguished by pathology; their pathogenesis and of exposure to coal mine dust and has a clinical appearance typical for cwp,
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By Sarah Dorsey Chief Leader. First-responders and others exposed to September 11 dust may be more susceptible to heart disease triggered by other health conditions they acquired from the disaster, researchers at Mount Sinai Medical Center announced March 20.. As principal investigator for the WTC CHEST program, Dr. Mary Ann McLaughlin studies the pulmonary effects of inhaling 9/11 particulate matter. Her group examined more than 800 September 11 first-responders between January 2011 and September 2013, and found links between breathing in the toxic dust and obstructive sleep apnea, which causes the upper airways to become blocked during sleep. The condition can strain the cardiovascular system and lead to high blood pressure and heart arrhythmias.. Dusts Side-Effects. The study found that those who breathed in the most toxic dust from the tower collapse were at highest risk for sleep apnea and also for post-traumatic stress disorder.. Study participants with PTSD had higher levels of a ...
To make the manicure a bit fancier, I applied a coat of Fairy Dust on top. Oh, Fairy Dust. I cant tell you how happy I am to finally have this amazing glitter. Its been my lemming for a long time and now I have it and Im probably going to use it a lot. Fairy Dust is a top coat with very tiny holographic silver glitters, and the name is perfect for it, because I definitely felt like I was wearing fairy dust on my nails ...
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Low-dust cellulose[edit]. The last major type of cellulose insulation on the market is low-dust variety. Nuisance levels of ... This may also be appropriate to homes where people are sensitive to newsprint or paper dust (though new dust will not be ... OSHA states that cellulose is a dust nuisance, requiring a dust mask during installation. ... Dust[edit]. Cellulose contains small particles which can be blown into the house through inadequate seals around fixtures or ...
Dust reduction systems[edit]. Main article: Dust reduction system. A method to prevent dust entering the chamber, by using a " ... though recent dust reduction systems alleviate this). Digital cameras with fixed lenses are not usually subject to dust from ... Several Canon DSLR cameras rely on dust reduction systems based on vibrating the sensor at ultrasonic frequencies to remove ... In common with other interchangeable lens designs, DSLRs must contend with potential contamination of the sensor by dust ...
Diamond dust[edit]. Main article: Diamond dust. Diamond dust, also known as ice needles or ice crystals, forms at temperatures ... such as dust or dirt. The storm's updraft blows the hailstones to the upper part of the cloud. The updraft dissipates and the ... Water vapor normally begins to condense on condensation nuclei such as dust, ice, and salt in order to form clouds. An elevated ... The METAR identifier for diamond dust within international hourly weather reports is IC.[28] ...
Dust and erosion control[edit]. Magnesium chloride is one of many substances used for dust control, soil stabilization, and ... "Dust Palliative Selection and Application Guide". Retrieved 2017-10-18.. ...
A dust devil (also known as a whirlwind) resembles a tornado in that it is a vertical swirling column of air. However, they ... Dust kicked up by the winds of the parent thunderstorm, heavy rain and hail, and the darkness of night are all factors that can ... A landspout, or dust-tube tornado, is a tornado not associated with a mesocyclone. The name stems from their characterization ... Fair weather waterspouts are less severe but far more common, and are similar to dust devils and landspouts. They form at the ...
Meteoroids and dust[edit]. The habitat would need to withstand potential impacts from space debris, meteoroids, dust, etc. Most ... and rock-dust as industrial slag is a free left-over from processing regolith for metals or volatiles extraction. Note that ...
Sahara Desert dust windblown to the Amazon. More than 56% of the dust fertilizing the Amazon rainforest comes from the Bodélé ... The dust contains phosphorus, important for plant growth. The yearly Sahara dust replaces the equivalent amount of phosphorus ... CALIPSO regularly tracks the Sahara-Amazon dust plume. CALIPSO has measured variations in the dust amounts transported - an 86 ... of dust fall over the Amazon basin (22 million tons of it consisting of phosphorus), 132 million tons of dust remain in the air ...
Dust devil tracks[edit]. Because a thin coating of fine bright dust covers much of the surface of Mars, passing dust devils ... Dust devils have been seen from the ground and from orbiting spacecraft. They have even blown the dust off of the solar panels ... Once inside the crater shade and dust preserve the snow. The snow changes to ice. The many concentric lines are created by the ... The water comes back to ground at lower latitudes as deposits of frost or snow mixed generously with dust. The atmosphere of ...
They can adhere to dust particles and can spread through the air attached to these dust particles or spores.[3] There must be ... Researchers of indoor mold also use a long-term settled dust collection method where a dust cloth or petri dish is left out in ... Bulk and Dust Sampling[edit]. Bulk removal of material from the contaminated area is used to identify and quantify the mold in ... Dust from surfaces such as floors, beds, or furniture is often collected to assess health effects from exposure in epidemiology ...
... cotton and polyester dust cloths, furniture spray, disposable paper "dust cloths", dust mops for smooth floors and vacuum ... Over time dust accumulates on household surfaces. As well as making the surfaces dirty, when dust is disturbed it can become ... Without housecleaning, lime scale can build up on taps, mold grows in wet areas, smudges appear on glass surfaces, dust forms ... Brooms remove debris from floors and dustpans carry dust and debris swept into them, buckets hold cleaning and rinsing ...
The wood router typically has 6"-10" air ducts to suck up the wood chips and dust created. They can be piped to a stand-alone ... Keep dust and similar away from wheels and bearings, use compressed air ... or full shop dust collection system. Some wood routers are specialized for cabinetry and have many drills that can be ...
Metal dusting[edit]. Main article: Metal dusting. Metal dusting is a catastrophic form of corrosion that occurs when ...
Mars without a dust storm on June 2001 (on left) and with a global dust storm on July 2001 (on right), as seen by Mars Global ... Dust storms contribute to water loss on Mars. A study of dust storms with the Mars Reconnaissance Orbiter suggested that 10 ... Regional dust storms were discovered to be closely related to where dust was available.[126] ... One unique repeated weather phenomenon involving mountains is a spiral dust cloud that forms over Arsia Mons. The spiral dust ...
Dust Liquid Gas. Solution:. oxygen in water. Liquid foam:. whipped cream, shaving cream. Sea foam, beer head ...
A supplementary New Mutants Annual series began in 1984. These annuals were always written by whoever was the regular New Mutants writer at the time and often included significant changes to the status quo which were not explained in the parent series so that readers would have to buy New Mutants Annual in order to follow events in both series.1985 annual was solicited as New Mutants Annual #2, but published as New Mutants Special Edition #1 because it exceeded the maximum page count for an annual.[5] In 1986, Professor X was written out of the series. Before he left, he made the X-Men's one-time nemesis, Magneto, headmaster of his school.[6] Magneto would be the team's longest-running headmaster, holding the position from New Mutants #35 through to #75. Fiercely overprotective of his students, particularly after the events of the "Mutant Massacre" and "Fall of the Mutants", he was increasingly used as an uptight foil for the adventurous New Mutants, setting rules that they would inevitably ...
"dust". 빙애기. bing-aegi. "chick". 가사. gasa. "umbrella". Compare with Japanese kasa ("wide-brimmed hat; umbrella, parasol") and ...
dust cover: a seal for the ejection port (which allows spent brass to exit the upper receiver after firing) from allowing ...
Sunshine Dust. (2018) Guiding Lights is the second studio album by progressive metal band Skyharbor. It was released on ...
Payne went over to 20th Century Fox where he appeared in Star Dust (1940). During filming, Darryl F. Zanuck offered him a long ...
Alien Crime Syndicate - Dust to Dirt (2000); From the Word Go (2000); Ten Songs in the Key of Betrayal (2004) ...
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Dust (1996) 1. Spirit 2. Bulukbara Man 3. Give This Day 4. Tjapwurrung Country 5. This Bliss 6. Coolamon Moon 7. Melbourne Town ... Upon leaving the venue, my aural senses were mixed with the reminiscent smells of a dripping tropical night and the red dust of ... Dust, in May that year using guest musicians Chris Abrahams (of The Necks), David Bridie (of not drowning, waving), and Moginie ...
Dust jacket. Creating Consumers: Home Economists in Twentieth-Century America. Chapel Hill: The University of North Carolina ... Home cleaning tasks can be separated into four categories: litter removal, storage of belongings, dusting, and washing of ...
On 29 October 2007 the tour bus for Decapitated was involved in an accident with a truck carrying wood in Gomel, on the Russia/Belarus border. Both Witold Kieltyka (also known as Vitek) and Adrian Kowanek were seriously injured. While it was initially believed that they were taken to Moscow to be treated after treatment at a local hospital, it was later confirmed that they were only taken to be treated in Novozybkov, where they have remained for the time being. On 2 November 2007 Vitek died from his injuries from the accident. He was 23 years old. Covan has since shown slow but progressive signs of improvement.[3] Covan's family released a short update in October 2008 concerning his improving condition.[4] In 2008, Kowanek left Decapitated during the band's hiatus, due to his slow recovery. ...
Yellow Dust Jack Hanway Three on the Trail Pecos Kane Under Two Flags Sidi-Ben Youssiff ...
Dust (1985). *Jumping (1986). *The Cruel Embrace (1987). *The Music Teacher (1988) ...
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For this reason, rock dusts such as limestone dust are spread throughout coal mines to diminish the chances of coal dust ... Respirable dust can cause long-term lung problems. Respirable coal dust can cause coal workers' pneumoconiosis (also known as ... Watering down in coal mines also helps to keep dust levels down: by spraying the machine with water and filtering the dust- ... coal dust. Dust less than 10 microns in size (cannot be seen with the eye). In non-coal mining, stone, and sand and gravel ...
Dust storm. *2010 China dust storms. Forest fires and haze. *1997 SEA haze ...
Dust Trevor Lissauer, Sebastian Tillinger, Shirlee Elliott, Lou Richards Der Schlafwandler Malibu Cop Francis Guinan, Catherine ...
Dust resistant surfaces. A dust resistant surface is a state of prevention against dust contamination or damage, by a design or ... Dust in this regime has a complicated emission spectrum, and includes both thermal dust emission and spinning dust emission.[14 ... House dust can become airborne easily. Care is required when removing dust to avoid causing the dust to become airborne. A ... Matthew J. Colloff, Dust Mites. *^ a b Middleton, N. J.; Goudie, A. S. (2001). "Saharan dust: Sources and trajectories". ...
Sources of Solar System dust include comet dust, asteroidal dust, dust from the Kuiper belt, and interstellar dust passing ... Cosmic dust, also called extraterrestrial dust or space dust, is dust which exists in outer space, as well as all over planet ... General diffuse interstellar medium dust, dust grains in dense clouds, planetary rings dust, and circumstellar dust, are each ... intergalactic dust, interstellar dust, interplanetary dust (such as in the zodiacal cloud) and circumplanetary dust (such as in ...
This is where large amounts of dust were found. It is contrasted with the outer shell (white and blue circles), where the ... This is where large amounts of dust were found. It is contrasted with the outer shell (white and blue circles), where the ...
airborne dust; cereals; grain dust; food industry; transport of materials; agriculture; handling and storage. ... dust control; exhaust ventilation; food industry; grain dust; handling and storage; hazard evaluation; irritants; limitation of ... Grain dust. Bibliographic information. HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1998, 8p. 16 ref. ... dust control; irritants; chronic bronchitis; United Kingdom; limitation of exposure; exhaust ventilation; allergic respiratory ...
We repeat the passage, " Dust thou art and to dust thou shalt return," but we hardly realize that the almost impalpable ... Dust is commonly regarded as being matter of death. But though upon examination with a powerful microscope we find it to ... Dust is so universally diffused throughout the atmosphere that no place within the limits of animated existence can be said to ... In view of these facts it will be seen that streets filled with dust, must be prejudicial to the sanitary condition of large ... ...
One thing Mars does have in abundance is dust - and dust is the enemy of moving parts, particularly for long-term colonisation ... Dusts a devil. From Martin Greenwood Nigel Henbest focuses on human issues associated with a permanent Mars settlement (13 ...
Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.
There were theories, sure, and the best one of the lot was that when a cloud of gas and dust collapsed (due to a collision with ... Dust clumps up on one side, making it brighter. Its certainly possible thats whats happening here. ... Its possible that HIP 12545 passed close enough to HD 15115 to disturb the dust disk, causing the asymmetry. The gravity of ...
Because the dust plume is diffuse, its origins are not easily discerned in this image. In the south, the dust mingles with ... Sahara Dust Storm. Acquired April 22, 2010, this natural-color image shows a dust plume spanning hundreds of kilometers in ... A dust storm crossed the border between Algeria and Mali on July 14, 2007. The Moderate Resolution Imaging Spectroradiometer ( ... A wall of dust appears to advance toward the southeast in Burkina Faso and Niger. ...
1. dust, clean, make clean. usage: remove the dust from; "dust the cabinets". 2. dust, smear, blur, smudge, smutch. usage: rub ... 3. dust, cover. usage: cover with a light dusting of a substance; "dust the bread with flour". 4. scatter, sprinkle, dot, dust ... "the furniture was covered with dust". 2. debris, dust, junk, rubble, detritus, rubbish, trash, scrap. usage: the remains of ... 1. dust, particulate, particulate matter. usage: fine powdery material such as dry earth or pollen that can be blown about in ...
... is a powerful evocation of the underbelly of Victorian London, full of flavour, completely convincing and utterly ...
While dust routinely blows across the Atlantic Ocean, scientists rarely see plumes as large and dense with particles as the one ... Dust Storm off Western Sahara. Saharan dust hovered over the Atlantic for several days in mid-January 2008. This image shows ... Saharan Dust on the Move. In June 2014, winds pushed a river of dust from western Africa across the Atlantic Ocean. ... Thick Dust Plumes Obscure Africas Coast. An extensive dust storm in late February carried debris over the Atlantic Ocean, en ...
p,Seven-year-old Matthew disappearsone day on a walk into Horshoe, a dust bowl farm town in Depression-era Saskatchewan. Other ...
... and at least some of the air pollution can be blamed on dust that traveled all the way from the Sahara. ... Saharan dust chokes London. London is exceptionally smoggy right now, and at least some of the air pollution can be blamed on ... As the AP describes it, many cars are "covered in a film of red dust." Conditions are expected to worsen through tomorrow as ... London is exceptionally smoggy right now, and at least some of the air pollution can be blamed on dust that traveled all the ...
Everything in the towers had been ground into dust-concrete, steel, glass, insulation, plastic, and computers. Dust analyses ... He could see the soot and dust floating in the air.. When it occurred to these responders that they might be sacrificing their ... The dust had an orange hue; at times, it twinkled. And it always stunk, an unforgettable smell he struggled to get past every ... The dust caked his eyes and coated his lips. It filled his nostrils with a horrible smell, like burned plastic and flesh. ...
This presentation provides an overview of the recent dust control efforts that are being used in the western North Dakota oil ... Products which penetrated the aggregate surface to provide a crust had a significant effect in controlling dust. Dust Control ... Estimated the Magnesium Chloride reduced dust by 90%. Estimated the Stabilock reduced dust by 80%. (Estimates according to Neil ... Western North Dakota Dust Control . Road Dust Institute 3rd Conference - Minneapolis, MN February 4, 2014 ...
Lyrics to Dust by Boots: [Intro:] / Yeah, bye / [Verse:] / Your love is a whitewashed flower / Every second is an hour so my ... Dust Lyrics Languages Arabic Deutsch Greek English Spanish French Italian Japanese Korean Netherlands Portuguese Russian ... The webs you spin immortalized in dust. [Verse 2:]. Your love is a fire gettin nearer. Its a stranger in the mirror, its a ... The webs you spin immortalized in dust. [Outro:]. Did I forget your name?. Baby you dont buy it. And everything could change. ...
Airborne dust is particle, or Particulate Matter (PM), pollution, and is one of the most significant air pollutants in Pima ... Teach the Earth > Geology and Human Health , Health Case Studies , Airborne Dust Particles Airborne Dust Particles ... How Airborne Dust Particles Travel The Earth Airborne Dust Particles can travel through various sources such as soil being ... Examples of the types of dust found in the work environment include: * mineral dusts, such as those containing free crystalline ...
I do not desire to eat or breath dust - So, I have never been to Burning Man. I am also not fond of running around naked - so, ... City of Dust: The Evolution of Burning Man. Nevada Museum of Art July 1, 2017 - January 28, 2018 ... Through historical photographs, artifacts, journals, sketches, and notebooks, City of Dust traces the humble countercultural ... City of Dust: The Evolution of Burning Man, which will relate the remarkable story of how Burning Man came to be and what its ...
The environment in and around the workshops is loaded with carbon dust and other toxic material. Young children play in these ... Sathis face is covered with carbon dust from recycled batteries. She is 8 and works in a battery recycling factory in ... The children constantly lick their lips to keep them wet, literally eating the dust particles. The particles they inhale can ... is covered with black carbon dust. Often only the whites of their eyes and red shiny lips are visible. ...
Thousands of people exposed to choking dust after the destruction of the World Trade Centre twin towers in New York have ... 9/11 dust gave thousands asthma Thousands of people exposed to choking dust after the destruction of the World Trade Centre ... There was a strong association between exposure to the choking dust cloud generated by the collapse of the towers and asthma ... There was a strong association between exposure to the choking dust cloud generated by the collapse of the towers and asthma, ...
Dust mites are microscopic bugs that live in household dust. ... DustMites. (Ácaros). Dust mites are microscopic bugs that live ... Many people with asthma are allergic to dust - but its the droppings produced by the mites in the dust, along with the body ... fragments of dead dust mites, that really cause allergic reactions. When breathed in, these can lead a person to develop ... in household dust. They work their way into soft places like pillows, blankets, mattresses, and stuffed animals. ...
Fairy dust.. More fairy dust is flying at the World Bank, where this week a $500 million Pandemic Emergency Financing Facility ... The G-7, representing the major industrial nations, is also responsible for dusting the epidemic terrain with fairy dust. At ... More fairy dust: No donors stepped up to sprinkle real cash on the Zika crisis, so Chan moved $3.8 million out of her not-yet- ... Fairy dust.. This weeks Ise-Shima G-7 summit also calls for WHO reform, improved epidemic responses, and funds to support them ...
Clearing the dust Minister of State for Defence Mallipudi Mangapti Pallam Raju bought a sword from Pakistan for Congress ... If you visit his house in the morning, you will find him clearing up or dusting bookshelves. This, he confesses, is how he ...
Dust mites are teeny, tiny bugs that live in household dust. ... Dust Mites. Say: dust mytz. Dust mites are teeny, tiny bugs ... This stuff gets into the air, and without the person knowing it, the dust mites can get into someones lungs. Dust mites dont ... You have to be pretty small to live in dust - and they are. You actually need a microscope to see them! So if you cant even ... Its also tough to get rid of dust mites because they work themselves into soft places like pillows, blankets, mattresses, and ...
... precursor fat cells exposed to endocrine-disrupting chemicals in house dust were found to proliferate and acquire more fat. ... House dust spurred triglyceride buildup. To reach their findings, the researchers visited 11 homes in North Carolina and ... The house dust samples were analyzed for levels of EDCs, and the team identified a total of 44 contaminants. ... The researchers found that extracts from seven of the house dust samples caused the 3T3-L1 cells to mature into adipocytes and ...
The largest snake in captivity is hisss-tory. Samantha, a 26-foot, 275-pound python, has died at 29, the Bronx Zoo said yesterday. Samantha
  • Dust are fine particles of matter. (
  • [1] It generally consists of particles in the atmosphere that come from various sources such as soil, dust lifted by weather (an aeolian process ), volcanic eruptions , and pollution . (
  • Dust in homes, offices, and other human environments contains small amounts of plant pollen , human and animal hairs , textile fibers , paper fibers , minerals from outdoor soil, human skin cells, burnt meteorite particles, and many other materials which may be found in the local environment. (
  • [8] Road dust consists of deposits of vehicle exhausts and industrial exhausts , particles from tire and brake wear , dust from paved roads or potholes , and dust from construction sites. (
  • [1] [2] Most cosmic dust particles are between a few molecules to 0.1 µm in size. (
  • In August 2014, scientists announced the collection of possible interstellar dust particles from the Stardust spacecraft since returning to Earth in 2006. (
  • When infrared astronomy began, the dust particles were observed to be significant and vital components of astrophysical processes. (
  • Cosmic dust can be detected by indirect methods that utilize the radiative properties of the cosmic dust particles. (
  • As dust crosses the ocean, larger particles fall out first, leaving behind mainly finer and smaller ones, which are especially problematic for human health. (
  • While dust routinely blows across the Atlantic Ocean, scientists rarely see plumes as large and dense with particles as the one that darkened Caribbean skies in June 2020. (
  • Airborne Dust Particles can come from pretty much anywhere, any movement or activity can cause a large amount of excess particles in the air. (
  • Airborne Dust Particles can travel through various sources such as soil being lifted up by weather (an Aeolian process), volcanic eruptions, and pollution. (
  • Airborne Dust Particles contaminates the biosphere through inhalation by humans and animals, and can also effect crops growing in an area with large amounts of dust particles. (
  • The children constantly lick their lips to keep them wet, literally eating the dust particles. (
  • Protection from dust is important because mold spores attach themselves to airborne dust particles. (
  • House dust may also contain tiny particles of pollen, mold, fibers from clothing and fabrics, and detergents. (
  • Dust particles collect in fabrics and carpets. (
  • This results in a centrifugal force acting on the dust particles suspended in the air stream. (
  • Preliminary tests show that some of the particles have a composition close to what one would expect from comet dust. (
  • We sieved the dust collected to remove fluff and large particles and weighed the resulting fine dust. (
  • Dust consists of skin particles, animal fur, and dirt from outside. (
  • These particles are so small that they can become airborne, and people can inhale them when something disturbs dust. (
  • During the current dust storm, Galileo has counted up to 20,000 dust particles per day, compared to the normal interplanetary rate of about one particle every three days, said Dr. Eberhard Grun, principal investigator on the spacecraft's dust detector experiment. (
  • The dust particles, probably no larger than those found in cigarette smoke, may also be leftover material from Comet Shoemaker-Levy 9, which impacted Jupiter last year. (
  • Due to increased temperatures, dust particles are lifted higher into the atmosphere, creating more wind. (
  • This has the effect of thickening the atmosphere and increasing the surface pressure, which enhances the process by helping suspend dust particles in the air. (
  • The anti-dust system centres on an anti-static filter on the sensor and a high-frequency vibrator, triggered when the camera starts up, to shake off any particles that have been picked up by the CCD. (
  • 13/10/10 - The DT450G compact dust monitors are designed to measure solid particles in gas using the triboelectric method. (
  • As the star puffs up, it sheds layers of gas that cool and congeal into tiny dust particles. (
  • According to a new analysis of NASA satellite data, 64 million tons of dust, pollution and other particles that have potential climate and human health effects survive a trans-ocean journey to arrive over North America each year. (
  • Dust and pollution particles rise into the atmosphere and can travel for days across numerous national boundaries before settling to Earth. (
  • Read More of Q&A with Hongbin Yu Dust particles are fine pieces of minerals that primarily come from dry, desert-like regions. (
  • High-altitude dust particles are less a concern for human health, but their impact on climate can be significant. (
  • One such impact on climate is a cooling effect, brought about by dust and some pollution particles that reflect sunlight back to space. (
  • Dust is made of fine particles of solid matter. (
  • Road dust consists of deposits of vehicle exhausts and industrial exhausts, particles from tire and brake wear, dust from paved roads or potholes, and dust from construction sites. (
  • House dust mites are present indoors wherever humans live. (
  • Dust mites are microscopic arachnids whose primary food is dead human skin cells, but they do not live on living people. (
  • It could take somewhere between twenty minutes and two hours for dust mites to settle back down out of the air. (
  • Dust mites are a nesting species that prefers a dark, warm, and humid climate. (
  • [3] House dust mites did not become a problem until humans began to use textiles, such as western style blankets and clothing. (
  • Dust mites are microscopic bugs that live in household dust. (
  • Many people with asthma are allergic to dust - but it's the droppings produced by the mites in the dust, along with the body fragments of dead dust mites, that really cause allergic reactions. (
  • Well, people can be allergic to dust mites and their droppings. (
  • This stuff gets into the air, and without the person knowing it, the dust mites can get into someone's lungs. (
  • Dust mites don't bother most people, but if the person has asthma , they can worsen breathing problems. (
  • It's also tough to get rid of dust mites because they work themselves into soft places like pillows, blankets, mattresses, and stuffed animals. (
  • Dust mites are soooooooo disgusting! (
  • Very tiny insects called dust mites are the main cause of dust allergies. (
  • Dust mites can only be seen under a microscope. (
  • Most dust mites in your home are found in bedding, mattresses, and box springs. (
  • You can do many things to limit your or your child's exposure to dust and dust mites. (
  • Dust mites thrive in moist air. (
  • Among the issues studied were animal, plant, and chemical allergens and irritants, as well as dust mites , cockroaches, fungi and mold, dander, hair and saliva from domestic pets, and a number of other factors. (
  • For instance, while covering up a mattress to reduce a person's exposure to dust mites might work well for an individual, it's not clear that's good public health strategy. (
  • Do dust mites bite? (
  • Dust mites are common household pests. (
  • Many people think that they are allergic to dust when they have an allergy to dust mites . (
  • Dust mites do not bite, but they can cause allergic reactions and skin rashes. (
  • It also looks at how to get rid of dust mites and prevent allergic reactions. (
  • Unlike other members of the mite family, dust mites do not actually bite. (
  • Dust mites do not feed on the blood of humans as some other mites do . (
  • Although they may "hitchhike" on clothing, it is a myth that dust mites live on people. (
  • Dust mites are very small, and there are many of them in almost every home, say the Centers for Disease Control and Prevention (CDC) . (
  • According to Asthma UK , research suggests that no method is likely to make a useful difference to the number of dust mites in a home. (
  • Freezing and then washing soft toys can also help remove dust mites. (
  • Specifically, leaving toys overnight in a sealed bag in the freezer will kill the dust mites, and washing them in hot water will remove their bodies. (
  • Washing clothes and linens using the hot wash setting will also help remove dust mites. (
  • Wash them in water that is at least 130°F (54°C) to kill dust mites, and wash them regularly - preferably every week. (
  • According to the AAFA , studies suggest that more dust mites live in the bedroom than anywhere else in the home. (
  • They go on to suggest that the bedroom is the best place to start when trying to prevent infestations of dust mites. (
  • As dust mites mostly eat the dead skin that makes up household dust, infrequent dusting can make a home welcoming to dust mites. (
  • Dust mites, close relatives of ticks and spiders, are too small to be seen without a microscope. (
  • Meteorologists track dust storms because the dry, dusty air can inhibit the formation of clouds and prevent hurricanes. (
  • We usually see this happen several times a year when big dust storms in the Sahara coincide with southerly winds to bring that dust here," one expert tells the Guardian . (
  • The dust storms start rolling into the southern Great Plains. (
  • Trixie Travis Brown Talks About Dust Storms. (
  • The annual dust storms have begun. (
  • Just as in America then, China's dust storms today are caused by years of drought and grossly inadequate land management. (
  • Besides inconvenience and discomfort, the dust storms also cause serious health hazards. (
  • Regional dust storms expanded and affected vast areas of Mars in 2001 and 2007, but not between those years nor since 2007. (
  • One thing we want to learn is why do some Martian dust storms get to this size and stop growing, while others this size keep growing and go global," Zurek said. (
  • Blowing dust storms, known as "haboob," look impressively dangerous, but are more of a nuisance than anything. (
  • The main hazard of such dust storms come from the fact that they can severely reduce visibility - creating unexpected and unsafe conditions for drivers. (
  • Dust storms can be expected during the afternoons of hot summer days when thunderhead clouds are seen - they are most common between the months of May and September in southern Arizona. (
  • According to the Arizona State Department of Transportation (ADOT), an average of five people each year will die, and many others are injured as a result of such blinding dust storms. (
  • This is the latest and greatest of several large dust storms encountered by Galileo since December 1994, when the spacecraft was still almost 110 million miles from Jupiter. (
  • Although both Ulysses and Galileo were able to show that the dust storms seem to come from Jupiter, the intensity and timing of the recent storms seen by Galileo differ from those detected by Ulysses. (
  • Chances of understanding the nature of these dust storms are improving since, after the onset of the current storm, Galileo flight engineers commanded the spacecraft to collect and transmit dust data as often as three times a day, according to Dr. Carol Polanskey, team chief for the dust instrument subsystem at NASA's Jet Propulsion Laboratory (JPL), Pasadena, CA. The normal collection rate had been twice per week. (
  • We're looking forward to determining the source of the dust storms once we get into the Jovian system. (
  • Now we have daily weather reports and images of dust storms. (
  • Martian dust storms are a pretty common occurrence, and generally happen whenever the southern hemisphere is experiencing summer. (
  • However, on occasion, Martian dust storms can grow to become global phenomena, covering the entire planet. (
  • As noted, dust storms occur on Mars when the southern hemisphere experiences summer, which coincides with the planet being closer to the Sun in its elliptical orbit. (
  • Planet-wide dust storms are a relatively rare occurrence on Mars, taking place every three to four Martian years (the equivalent of approximately 6 to 8 Earth years). (
  • The bag stackers respirable dust stacker a physical indication of the clean air exposure was 5 to 11 times higher when the air boundary provided by the OASIS. (
  • This envelope reductions of the bag stackers respirable dust of clean air was not powerful enough to overcome exposure to MSHA-acceptable dust concentra- the dust that was being blown up into the bag tions. (
  • July 28, 2016 /PRNewswire/ -- In any mining operation, respirable dust is a detrimental but inherent consequence, resulting in health and safety hazards to workers. (
  • The need for improved dust control in mining operations is evident from the Mine, Safety, and Health Administration's (MSHA's) new respirable coal dust regulations, which requires lowering the level of respirable dust from 2.0 mg/m 3 to 1.5 mg/m 3 , and mandates a significant increase in sampling frequency. (
  • Waste processing and garnetting operations are exempted from all except the medical provisions of 1910.1043 and retaining the 1000 ug/m3 exposure limit of 1910.1000 interpreted as a respirable dust limit. (
  • Porous chondrite interplanetary dust particle. (
  • intergalactic dust , interstellar dust, interplanetary dust (such as in the zodiacal cloud ) and circumplanetary dust (such as in a planetary ring ). (
  • In the Solar System , interplanetary dust causes the zodiacal light . (
  • L4 and L5 are not completely stable, as they are disturbed by the gravitational pull of the Sun. Nonetheless they are thought to be locations where interplanetary dust might collect, at least temporarily. (
  • NASA's Galileo spacecraft is plowing through the most intense interplanetary dust storm ever measured as it closes in on Jupiter after a six-year journey to reach the giant planet, scientists report. (
  • Atmospheric or wind-borne fugitive dust , also known as aeolian dust , comes from arid and dry regions where high velocity winds are able to remove mostly silt-sized material, deflating susceptible surfaces. (
  • Often, there is little appreciation for the increased risk posed by fugitive dust-dust lying on the floor, on I beams, or other surfaces. (
  • The escaping pressure wave hits fugitive dust and lifts it up into a cloud. (
  • Benetech, Inc. is further refining its focus on dust mitigation that reduces accident and injury hazards caused by fugitive dust. (
  • Fugitive dust also can lead to mechanical wear and more-frequent clean-up around conveyor belts, raising the risk of a threat in those areas. (
  • Benetech, Inc. provides new dust-mitigation systems that solve fugitive-dust problems according to a plant's design and implementation requirements. (
  • Most governmental EPAs, including the United States Environmental Protection Agency (EPA) mandate that facilities that generate fugitive dust, minimize or mitigate the production of dust in their operation. (
  • 3M™ Home Dust Mask, used for relief from non-harmful household dust, offers homeowners an option in helping reduce the inhalation of common household dusts, dirt, pollen and grass clippings. (
  • Our study is the first comprehensive analysis of consumer product chemicals found in household dust," says lead author Ami Zota, ScD, MS, assistant professor of environmental and occupational health at Milken Institute SPH. (
  • There were theories, sure, and the best one of the lot was that when a cloud of gas and dust collapsed (due to a collision with another cloud, or maybe the wind from a nearby star, or getting slapped around by a supernova blast), it formed a flat disk. (
  • But the intensity and extent of a plume that departed Africa in June 2020 was so great that it had internet meme-makers buzzing about a "Godzilla" dust cloud. (
  • The data in the transect below reveal the height of the dust over the Dominican Republic as observed by the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument on the CALIPSO satellite on June 23, 2020. (
  • The study's authors, led by Dr Robert Brackbill, from the Centres for Disease Control and Prevention in Atlanta, Georgia, wrote in the Journal of the American Medical Association (Jama): "These analyses confirm that intense dust cloud exposure was associated with new asthma diagnoses for each eligibility group, including the 1,913 passers-by who only had exposure to the area air and dust on September 11 . (
  • NEW YORK, Dec. 7 (UPI) -- Ever since the big gray cloud of dust blew through Lower Manhattan from the collapsing World Trade Center's Twin Towers Sept. 11, there have been conflicting opinions on what to do with it. (
  • On Sept. 11 the dust cloud was like a sonic boom through Lower Manhattan -- my windows were open so my apartment near the World Trade Center got filled with dust," said Indira Singh, a risk architect and volunteer emergency medical technician told United Press International. (
  • The flame ball that emerges through the breach then ignites the suspended dust cloud in the room, and a secondary explosion ensues. (
  • Horváth's group were able to rule out optical artefacts and other effects, meaning that the presence of the dust cloud is confirmed. (
  • Scientists propose a dust cloud made of asteroid material could help to cool Earth. (
  • To combat global warming, scientists in Scotland now suggest an out-of-this-world solution - a giant dust cloud in space, blasted off an asteroid, which would act like a sunshade for Earth. (
  • Now instead of having a dust cloud floating by itself in space, researchers suggest an asteroid could essentially gravitationally anchor a dust cloud in space to block sunlight and cool the Earth. (
  • The dust cloud is not a permanent cure, but it could offset the effects of climate change for a given time to allow slow-acting measures like carbon capture to take effect. (
  • The researchers calculate that the largest near-Earth asteroid, 1036 Ganymed, could maintain a dust cloud large enough to block out 6.58 percent of the solar radiation that would normally reach Earth, more than enough to combat any current global warming trends. (
  • Road dust is a significant source contributing to the generation and release of particulate matter into the atmosphere. (
  • Airborne dust is particle, or Particulate Matter (PM), pollution, and is one of the most significant air pollutants in Pima County. (
  • Protect yourself from dust and other particulate matter in your shop with the SoftSeal® N95 Dust Mask. (
  • Analyses of our dust samples showed that one in four samples tested contained 2.1 percent asbestos, which is more than double the 1 percent level at which a material is legally designated as hazardous, and is subject to special abatement and removal procedures," said Kupferman. (
  • Kupferman said that New Yorkers returning to their apartments have no way of knowing if the dust there contains more than 1 percent asbestos that requires professional abatement. (
  • Her lawyer said the decision, although based on matters of legal process, amounted to vindication for Jenkins's claims that the EPA had covered up the danger posed to first responders and others in lower Manhattan from the asbestos and highly corrosive dust that rose from the wreckage of the World Trade Center. (
  • Saharan dust in particular can be transported and deposited as far as the Caribbean and the Amazon basin , and may affect air temperatures, cause ocean cooling , and alter rainfall amounts. (
  • This is where large amounts of dust were found. (
  • Seasonal changes in wind strength and direction can loft copious amounts of dust into the air and carry it across seas and ocean basins. (
  • Researchers from Duke University in Durham, NC, exposed mouse-derived precursor fat cells to small amounts of house dust containing endocrine-disrupting chemicals (EDCs). (
  • For minimal amounts of dust the EPA recommends following the city Health Department guideline. (
  • Results indicate the star recently exploded with copious amounts of fresh dust, equivalent in mass to our planet Earth. (
  • Astronomers know of one other star currently pumping out massive amounts of dust. (
  • Indoor dust consistently contains four classes of harmful chemicals in particularly high amounts: Phthalates, phenols, flame retardants, and highly fluorinated chemicals (HFCs). (
  • A dust storm crossed the border between Algeria and Mali on July 14, 2007. (
  • In the summer of 2007 a huge dust storm blanketed Mars, and deposited a fair amount of dust on solar panels of both rovers. (
  • This nearly global mosaic of observations made by the Mars Color Imager on NASA's Mars Reconnaissance Orbiter on Nov. 18, 2012, shows a dust storm in Mars' southern hemisphere. (
  • Small white arrows outline the area where dust from the storm is apparent in the atmosphere. (
  • PASADENA, Calif. -- A Martian dust storm that NASA's Mars Reconnaissance Orbiter has been tracking since last week has also produced atmospheric changes detectable by rovers on Mars. (
  • This is now a regional dust storm. (
  • From decades of observing Mars, scientists know there is a seasonal pattern to the largest Martian dust-storm events. (
  • The dust-storm season began just a few weeks ago, with the start of southern-hemisphere spring. (
  • Take a look at some huge Arizona dust storm videos - an impressive 10,000 foot-tall wall of dust, 30 or more miles wide, moving quickly across the desert and into the cities around Phoenix . (
  • NASA Spots Opportunity as the Dust Storm Clears. (
  • As expected, the rover was spotted on the slopes of the Perseverance Valley, where it went into hibernation mode about 100 days ago when the planet-covering dust storm darkened skies above the region. (
  • One such storm began back in May, starting in the Arabia Terra region and then spreading to become a planet-wide dust storm within a matter of weeks . (
  • And while no word has been heard from the rover, NASA recently indicated that the dust storm will dissipate in a matter of weeks. (
  • This global map of Mars shows a growing dust storm as of June 6, 2018. (
  • Simulated views of a darkening Martian sky blotting out the Sun from NASA's Opportunity rover's point of view, with the right side simulating Opportunity's view in the global dust storm as of June 2018. (
  • Positive tests for dust mite allergies are extremely common among people with asthma. (
  • When your asthma or allergies become worse due to dust, you are said to have a dust allergy. (
  • This article looks at the symptoms of dust mite allergies. (
  • However, dust mite allergies will persist indoors, and symptoms typically occur year-round . (
  • Dust mite allergies can also trigger asthma attacks and can therefore be quite serious. (
  • Ineffective dust removal can aggravate allergies and asthma . (
  • House dust mite allergies are a reaction to tiny bugs that are commonly found in house dust. (
  • Individuals with house dust mite allergies may experience a cough, runny nose, nasal itching, nasal congestion, sneezing, and itchy and watery eyes. (
  • Use a vacuum cleaner with a HEPA filter to help control the dust that vacuuming stirs up. (
  • Some of city's recommendations said tenants should wet down dust and remove it in layers, rinse rags in a sink and use special HEPA vacuums because regular vacuums would redistribute dust in the air. (
  • [3] In October 2011, scientists reported that cosmic dust contains complex organic matter (amorphous organic solids with a mixed aromatic - aliphatic structure) that could be created naturally, and rapidly, by stars . (
  • These organic substances can produce dust when handled. (
  • Anyone can be exposed to organic dust and mold. (
  • Exposure to organic dust and mold can cause bronchitis and asthma. (
  • Organic dust toxic syndrome (ODTS) is a condition that exists when workers are exposed to moldy or dusty areas. (
  • In a broad sense, any organic dust, handled in large quantities, poses a risk. (
  • If you are handling large quantities of organic dusts, have any of the types of equipment discussed above, and recognize the presence of one or more of the common causes for ignition, then you probably have a risk. (
  • By one estimate, as much as 40,000 tons of cosmic dust reaches the Earth's surface every year. (
  • And climate scientists study dust because big events can absorb enough light to affect Earth's radiation budget . (
  • Cosmic dust is also attracted by the earth's gravity and is deposited on the earth's surface in estimated quantities of 30-1000 t daily. (
  • Although the Environmental Protection Administration in Washington has issued a number of statements saying hazards were low, EPA Region II spokeswoman Mary Helen Cervantes said, "We recommend that if there is more than a minimal amount of dust in an apartment, and this is subjective, but if you can put a ruler in it, a professional contractor should be called to remove it. (
  • In effect, the amount of dust in the atmosphere created a state of perpetual night over the rover's location in Perseverance Valley, which forced the rover's science team to suspend operations. (
  • Thousands of people exposed to choking dust after the destruction of the World Trade Centre twin towers in New York have developed asthma, a study has shown. (
  • In total, 39pc of all those who developed asthma had been intensely exposed to the dust. (
  • If existing conditions such as asthma are known, it is important to use a respirator around dust and mold. (
  • Only the dust mite gathered enough evidence to rank as an asthma cause. (
  • The only agent we can really feel that you could invoke causality on, with any degree of certainty, in terms of developing asthma in an individual who has not had asthma symptoms previously, is a dust mite," he says. (
  • In New Zealand 81% of patients with severe asthma have a positive skin prick test to house dust mite allergen, 3 and exposure to mite allergen is a factor in triggering attacks of asthma in asthmatic subjects. (
  • To reduce dust exposure, use an exhaust ventilation system in conjunction with an envelope of clean air over the bagstacker provided by an overhead air supply. (
  • MSHA) records indicate the bag chine so the bags are easier to stackers dust exposure is one of move. (
  • Ways to reduce the dust exposure problem occurs because the air and strain to the bag stacker are slide causes dust to blow up onto in constant development. (
  • Re- the bag stacker, significantly in- cently, automated systems have creasing the dust exposure. (
  • The impact of the air slide that the exhaust hood be modified to make it on the bag stackers dust exposure was found physically impossible for the bag stacker to place by using real-time dust monitors. (
  • No increase was found in the bag system (OASIS) was also used to provide an stackers dust exposure with two of the prod- envelope of clean air over the bag stacker. (
  • A new study indicates that exposure to endocrine-disrupting chemicals present in house dust may disrupt metabolic health and trigger an increase in body fat, particularly for children. (
  • With this in association in mind, Stapleton and colleagues sought to investigate whether exposure to house dust - which is known to harbor EDCs - affects the growth of fat cells, or adipocytes. (
  • This condition causes an allergic reaction within the individual after exposure to dust and mold. (
  • Plan outside work to minimize dust exposure. (
  • Avoid exposure to dust from decayed plants, leaves, mulch and other materials. (
  • Amendment of the occupational exposure to cotton dust standard that was issued in 1978 (29 CFR 1910.1043). (
  • Revisions include incorporation of an action level, modification of exposure monitoring requirements, extension of compliance deadlines for ring spinning of coarse count yarn with a high cotton content, addition of a protocol for determining equivalency to vertical elutriator, incorporation of a wage retention provision, exclusion of oil mist from the definition of cotton dust, clarification of scope of coverage, and substantial changes to the washed cotton provisions reflecting current research. (
  • The SoftSeal® N95 dust mask also offers protection against airborne viruses and bacteria, including H1N1 and Swine Flu, and meets CDC guidelines for TB exposure control. (
  • Occupational Matters onsite testing will reduce occupational exposure to chemicals, dust and noise in the workplace. (
  • The microscopic but ubiquitous dust mite apparently is the only definitive indoor cause among individuals without previous symptoms. (
  • Winds routinely drive clouds of Saharan dust out of West Africa and across the Atlantic Ocean in the summer. (
  • The sequence of images above, based on data from NASA's Goddard Earth Observing System (GEOS) modeling system, shows pulses of Saharan dust at one-week intervals as they made their way across the Atlantic Ocean. (
  • Likewise, outbreaks of Saharan dust can play a key role in fertilizing the nutrient-poor soils of the Amazon rainforest in the winter and spring. (
  • House dust mite. (
  • In the light of this finding, we have compared pillows with synthetic and feather fillings for their content of Der p I, the major allergen of the house dust mite Dermatophagoides pteronyssinus. (
  • The U.S. Food and Drug Administration today approved Odactra, the first allergen extract to be administered under the tongue (sublingually) to treat house dust mite (HDM)-induced nasal inflammation (allergic rhinitis), with or without eye inflammation (conjunctivitis), in people 18 through 65 years of age. (
  • House dust mite allergic disease can negatively impact a person's quality of life," said Peter Marks, M.D., Ph.D., director of the FDA's Center for Biologics Evaluation and Research. (
  • Odactra exposes patients to house dust mite allergens, gradually training the immune system in order to reduce the frequency and severity of nasal and eye allergy symptoms. (
  • Therefore, NIOSH researchers suggested dust concentrations. (
  • Infectious disease researchers watch them because dust plumes can be vectors for viral and bacterial diseases. (
  • Researchers say that EDCs in house dust may disrupt metabolic health. (
  • To reach their findings, the researchers visited 11 homes in North Carolina and collected samples of indoor dust. (
  • Next, the researchers tested extracts of each dust sample on 3T3-L1 cells, which are precursor adipocyte cells derived from mice. (
  • The researchers found that extracts from seven of the house dust samples caused the 3T3-L1 cells to mature into adipocytes and accrue triglycerides, while extracts from nine of the house dust samples triggered cell proliferation, increasing the number of precursor fat cells. (
  • The researchers note that as little as 3 micrograms of house dust triggered fat-producing effects, which is well below the 50 milligrams of house dust the United States Environmental Protection Agency (EPA) say that children ingest, inhale, or absorb through their skin every day. (
  • While further studies are needed to gain a better understanding of how house dust might interfere with metabolic health, the researchers believe that their findings are a cause for concern. (
  • Researchers collected dust samples from computers in eight states, including university labs in New York, an interactive exhibit at a kiddie museum in Maine and the government offices in California. (
  • In nutrient-limited waters, iron and other nutrients in dust can trigger phytoplankton blooms with wide-ranging effects," explained Hongbin Yu, a scientist at NASA Goddard Space Flight Center. (
  • NASA scientists are also concerned about health issues that may result from inhaling Moon dust. (
  • He is a pathologist at NASA Ames studying the effects of mineral dust on human health. (
  • The resulting wind kicks up yet more dust, creating a feedback loop that NASA scientists are still trying to understand. (
  • Artist's impression of dust formation around a supernova explosion. (
  • Here, an artist's depiction of what a spacecraft spewing asteroid dust might look like. (
  • This artist's impression shows the dust torus that astronomers think encircles some supermassive black holes.Just as in a tornado, where debris is often found spinning about the vortex, so around a black hole, a dust torus can surround its waist. (
  • A method for determining parameters that are important for the combustion kinetics of coal dust is developed. (
  • Values of these parameters for six types of lignite are obtained from experimental results on combustion of coal dust in a laboratory furnace. (
  • Coal dust is responsible for the lung disease known as pneumoconiosis, including black lung disease that occurs among coal miners. (
  • The danger of coal dust resulted in environmental legislation regulating work place air quality in some jurisdictions. (
  • In addition, if enough coal dust is dispersed within the air in a given area, in very rare circumstances, it can create an explosion hazard under certain circumstances. (
  • They and their feces and other allergens they produce are major constituents of house dust, but because they are so heavy they are not suspended for long in the air. (
  • Use furniture polish to help reduce dust and other allergens. (
  • The environment in and around the workshops is loaded with carbon dust and other toxic material. (
  • The fine dust might even be toxic. (
  • While the possibility of noxious dust bunnies comes as little surprise - it's a topic we've written about before - this new study is the first comprehensive meta-analysis of toxic chemicals found in house dust. (
  • Only one of 11 dust samples appeared completely inactive, suggesting that the causative chemical(s) are nearly ubiquitous in the indoor environment," say the authors. (
  • Aprilaire can provide your family with whole-home indoor air quality solutions that provide an effective and effortless method of dust removal. (
  • Our whole-home ventilation solutions expel stale, dusty indoor air and exchange it for fresh, dust-free outdoor air. (
  • For the jazz band, see Cosmic Dust (band) . (
  • Cosmic dust , also called extraterrestrial dust or space dust , is dust which exists in outer space , as well as all over planet Earth . (
  • Cosmic dust was once solely an annoyance to astronomers, as it obscures objects they wish to observe. (
  • [13] For example, cosmic dust can drive the mass loss when a star is nearing the end of its life , play a part in the early stages of star formation , and form planets . (
  • Cosmic dust of the Andromeda Galaxy as revealed in infrared light by the Spitzer Space Telescope . (
  • Cosmic dust can also be detected directly ('in-situ') using a variety of collection methods and from a variety of collection locations. (
  • Space exposed surfaces, e.g., of space stations or space vehicles may be seriously eroded by cosmic dust hitting these surfaces. (
  • This has been extensively studied by secondary ion mass spectrometry, the key instrumentation for cosmic dust analysis and dust eroded surfaces in combination with scanning electron microscopy. (
  • A further chapter describes asteroids with much larger "grain sizes" than cosmic dust. (
  • It is estimated that more than 1000 t of cosmic dust and some coarser rocky materials are reaching the surface of the earth daily! (
  • Expanding Universe or Cosmic Dust? (
  • However, cosmic dust [2] in the Milky Way may also produce AME similar to that found in BICEP2 thereby placing in question the Big Bang and the expanding Universe. (
  • Similarly, an expanding Universe was questioned [4] because of cosmic dust exaggerating Hubble redshift measurements of distant galaxies by Doppler's effect. (
  • What this means is cosmic dust is the commonality by which an expanding Universe may be assessed. (
  • But if so, how are the AME and Hubble redshift related to cosmic dust? (
  • QED induced EM radiation in cosmic dust NPs is proposed as the mechanism by which both AME and Hubble redshift may be used to question an expanding Universe. (
  • It's a dust bunny of cosmic proportions. (
  • Repeated inhalation of mold and dust from peat, vermiculite, perlite, mulch or other substances can cause different illnesses. (
  • If you visit his house in the morning, you will find him clearing up or dusting bookshelves. (
  • To most Westerners, dust is what builds up on bookshelves every few weeks. (
  • The dust season here calls to mind the scenes from America's Dust Bowl in the 1930s, when whole houses and farms were buried or scraped away by blowing dirt. (
  • Later, extrapolation of 353 GHz Planck telescope data [3] to 160 GHz suggested the AME was caused by dust and not remnants of gravitational waves, thereby placing doubt in the expanding Universe. (
  • DUST IN DEPTH The Planck satellite analyzed the same patch of sky, shown here within the white dots, that the BICEP2 telescope measured in a search for primordial gravitational waves. (
  • in the clouds of the diffuse interstellar medium , in molecular clouds , in the circumstellar dust of young stellar objects , and in planetary systems such as the Solar System , where astronomers consider dust as in its most recycled state. (
  • The astronomers accumulate observational 'snapshots' of dust at different stages of its life and, over time, form a more complete movie of the Universe's complicated recycling steps. (
  • A team of Hungarian astronomers and physicists may have confirmed two elusive clouds of dust, in semi-stable points just 400,000 kilometres from Earth. (
  • Astronomers know that most, if not all, AGN contain similar dust structures, but they debate what shape the dusty shrouds take. (
  • In some cases astronomers can look along the axis of the dust torus from above or from below and have a clear view of the black hole. (
  • Astronomers used images from NASA's Wide-field Infrared Survey Explorer, or WISE, to locate an aging star shedding loads of dust (orange dot at upper left). (
  • For generations astronomers seeking to unravel the complexity of the Universe have been frustrated by such dust blocking their view of many galaxies and the oldest parts of the Universe. (
  • The scientific programme will bring together leading computational and experimental scientists working to unlock the secrets of the gas-grain interaction with astronomers engaged in observing and understanding star and planet formation and the role of icy dust grains in these processes and potentially chemists and biologists seeking to understand the first tentative steps toward life on our own planet and others! (
  • 1 ]. Another source reports daily that dust quantities of between 30 and 400 t [ 2 ] are reaching the earth. (
  • This debris includes large quantities of micron and sub-micron size dust grains. (
  • The results of the study reveal that mineral dust from the African regions of the Sahara and Sahel, which emit between 600 and 700 tons of dust a year, brought about the reddish soil in Mediterranean regions such as Mallorca and Sardinia between 12,000 and 25,000 years ago. (
  • The study, which has been published in Quaternary Science Reviews, finds that African mineral dust additions "play an important role" in the origin of the soils (palaeosols) in the Mediterranean region, namely on the island of Mallorca. (
  • The largest sources of airborne mineral dust can be found in the Sahara and Sahel regions, with emissions of between 600 and 700 tons per year. (
  • It describes the health hazards of wood dust, explains how to evaluate and control wood dust hazards and highlights the need for medical supervision. (
  • Phthalates such as DEP, DEHP, DNBP, and DIBP, are not only found at the highest concentrations in dust but are associated with many serious health hazards. (
  • Because the dust plume is diffuse, its origins are not easily discerned in this image. (
  • Acquired April 22, 2010, this natural-color image shows a dust plume spanning hundreds of kilometers in western Africa. (
  • A dust plume arose over Inner Mongolia and on April 9, 2012, began its eastward journey over the Sea of Japan. (
  • The research found that dust on computer processors and monitors contains several chemicals that have been linked to neurological and reproductive disorders. (
  • Comprehensive study digs into house dust and finds harmful chemicals like phthalates and flame retardants in 90 percent or more of dust samples. (
  • But for the rest of us, new research has found that the seemingly innocuous powder that takes to our homes in the form of house dust is packed with hazardous chemicals coming from everyday products. (
  • The findings suggest that people, and especially children, are exposed on a daily basis to multiple chemicals in dust that are linked to serious health problems. (
  • The authors say that chemicals from consumer products are released into the air and then settle into the dust. (
  • Ten harmful chemicals are found in 90 percent of the dust samples across numerous studies, including a known cancer-causing agent called TDCIPP, a flame retardant frequently found in furniture, baby products and other household items. (
  • The tire layer of bags is positioned, the two main sources are the dust on bag stacker operates the controls the outside of the bag and the dust on the palletizing machine to that escapes from inside the bag lower the layer of bags onto the as it is loaded. (
  • Our main goals for each Benetech customer are safe material flow and a dust-free work environment. (
  • The main effects of increased dust in the air at its site would be haze in images and increased air temperature. (
  • This is one of the main ways dust is recycled in our universe, making its way from older stars to newborn solar systems. (
  • However, although the analysis of the soil indicates that African dust is the main contributor to the formation of the palaeosol, "the underlying rock also contributes, probably with residual quartz," the researcher added. (
  • With a 3-D view of the atmosphere now possible from satellites, the scientists calculated that dust, not pollution, is the main ingredient of these imports. (
  • When a thick layer of dust coats the solar panels, it blocks the sunlight that generates power for the six-wheeled robots. (
  • Currently, only about one-third of incoming sunlight is able to penetrate dust on Spirit's solar panels to be converted to electricity. (
  • The skies in the area are now clear, which means additional dust shouldn't be accumulating on the solar panels, and sunlight should be abundant. (
  • This is due to the dust absorbing sunlight at that height, so it indicates the dust is being lofted well above the surface and the winds are starting to create a dust haze over a broad region. (
  • The terminology has no specific application for describing materials found on the planet Earth except for dust that has demonstrably fallen to Earth. (
  • Ehren-berg has described several hundred kinds of diatoms found in atmospheric dust. (
  • The dust is different from dust found elsewhere in that human lungs are unable to dispel it through natural immune-system processes. (
  • Steele, who took over the RNC from Duncan, has found himself increasingly under fire after last week's dust-up over the $2,000 spent at the Voyeur nightclub -- as well as lavish spending on plane flights and hotels. (
  • A REMOTE region of Antarctica has yielded what may be the best-preserved comet dust yet found, perhaps in better condition than the samples NASA's Stardust mission brought back from a comet's tail. (
  • A team of meteorite experts led by Jean Duprat of the University of Paris South, France, found the dust in snow collected near Concordia base, high on the Antarctic plateau. (
  • Through data analysis and modeling, the team found evidence of a dust structure with two distinct, perpendicular components, one spread out along the disk and one oblong in the perpendicular direction. (
  • Circinus is no exception: the research team found hot dust where the "hole" in the donut should be - 80% of the mid-infrared emission seems to come from the diffuse component that's perpendicular to the compact disk. (
  • Phthalates were found in the highest concentration with a mean of 7,682 nanograms per gram of dust - an amount that was several orders of magnitude above the others. (
  • Grun, a scientist at the Max Planck Institute for Nuclear Physics, Heidelberg, Germany, also has dust detectors aboard the Ulysses spacecraft that flew by Jupiter in 1992 on its way to study the Sun, and on the Cassini spacecraft scheduled for launch to Saturn in 1997. (
  • ProDetec provide a range of Sintrol Dust Detectors for industrial, mining and manufacturing applications. (
  • Strangely, it is not asked what caused nearly everything but the steel to turn to unusually fine dust, the concrete, the office equipment including filing cabinets computers, and desks, and even the personnel. (
  • Levels of Der p I are usually given as μg Der p I per gram of fine dust. (
  • We therefore measured total Der p I as well as μg Der p I/g fine dust for each pillow. (
  • Table 1 shows the geometric means of the total weight of Der p I and μg Der p I/g fine dust obtained. (
  • Paired analysis showed that the polyester filled pillows contained significantly more total weight of Der p I (mean ratio 8.05 (95% confidence interval 1.69 to 38.2), P = 0.015) and significantly higher μg Der p I/g fine dust (mean ratio 3.57 (1.13 to 11.27), P = 0.034) than the feather filled pillows. (
  • Space dust" redirects here. (
  • For other uses, see Space dust (disambiguation) . (
  • A study of teeny-tiny meteorite fragments revealed that two essential components of life on Earth as we know it, could have migrated to our planet on space dust. (
  • Space dust, however, is more plentiful as it is constantly available from comets and asteroids shedding debris in their travels through the solar system. (
  • 10. Products that provided a veneer had a limited life of dust suppression. (
  • Its products, services and technologies reduce dust, prevent spillage, improve material flow and reinforce compliance. (
  • Use mechanical controls, such as fans and filters, to remove dust and mold from enclosed environments. (
  • While you can never completely remove dust, Aprilaire can help you significantly reduce it. (
  • Investigation of Methodologies to Control Dust on County Roads in Western North Dakota" Francis Schwindt 2012. (
  • Central heating and air-conditioning systems may help control dust. (
  • United States Federal law requires that construction sites obtain permits to conduct earth moving, clearing of areas, to include plans to control dust emissions when the work is being carried out. (
  • Some of the issues include:[citation needed] Reducing dust related health risks that include allergic reactions, pneumonia and asthmatic attacks. (
  • The system should include special filters to capture dust and animal dander. (
  • Dust in the atmosphere is produced by saltation and sandblasting of sand-sized grains, and it is transported through the troposphere . (
  • This airborne dust is considered an aerosol and once in the atmosphere, it can produce strong local radiative forcing . (
  • Dust is so universally diffused throughout the atmosphere that no place within the limits of animated existence can be said to be free from it under ordinary circumstances. (
  • One preliminary analysis of aerosol optical depth (AOD) measurements from NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) sensor showed a greater concentration of dust in the atmosphere over the Atlantic Ocean on June 20 than on any other day since 2003. (
  • Our study shows that only about 5 percent of trans-Pacific dust enters the continent within the lowest 1.2 miles (2 kilometers) of the atmosphere. (
  • Kordylewski observed two nearby clusters of dust at L5 in 1961, with various reports since then, but their extreme faintness makes them difficult to detect and many scientists doubted their existence. (
  • As scientists and engineers figure out how to return astronauts to the Moon, set up habitats, and mine lunar soil to produce anything from building materials to rocket fuels, they are scratching their heads over what to do about Moon dust. (
  • So scientists are left with observational data from different angles and viewpoints that create only a piecewise picture of what the dust could look like on larger scales. (
  • Sources of Solar System dust include comet dust , asteroidal dust , dust from the Kuiper belt , and interstellar dust passing through the Solar System. (
  • A smaller fraction of all dust in space consists of larger refractory minerals that condensed as matter left by stars. (
  • Much of the solid material consists of the dust controlling additive, it is compacted into a smaller container size than the liquid dust suppressant, which means less storage area is needed. (
  • Do the imported dust and pollution aerosols impact air quality and human health? (
  • Soil stabilizers generally did not have a great effect in limiting dust. (
  • However, the experiment he described at LEAG involved transforming Moon dust: He once put a small pile of lunar soil brought back by Apollo astronauts into a microwave oven. (
  • Lightweight and disposable the 3M™ Home Dust Mask is a great choice in respiratory protection for DIYers working on projects in and around the home. (
  • Used as Dust Mask as Advertised. (
  • These dust eruptions probably occur only once every 10,000 years in the lives of old stars, and they are thought to last less than a few hundred years each time. (
  • The most frequent dust control violations occur at new residential housing developments in urban areas. (
  • The star is heating the dust and causing it to glow with infrared light. (
  • the unseen rest hide behind interstellar dust. (
  • Interstellar dust is the solid phase of interstellar matter from which stars and planets form. (
  • The Faraday discussion meeting aims to address the cyclic role of dust in the chemical evolution of the Universe, from its synthesis in aged and dying stars, through its role in the gas-grain interaction in increasingly dense environments in the interstellar medium (ISM) through to grain-grain collisions and the first steps in the construction of new stars and planetary systems. (
  • They have calculated that the dust is speeding through interplanetary space at velocities ranging from 90,000 to 450,000 miles per hour, depending on particle size. (
  • Yu and colleagues estimated that dust crossing the Pacific Ocean accounts for 88 percent, or 56 milliontons, of the total particle import to North America every year. (
  • Dust movement is particularly active in spring, when the rise of cyclones and strong mid-latitude westerlies boost particle transport across the Pacific. (