Results 211 to 220 of about 350,238 (260)
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2020
International audience; Particulate matter (PM), defined as the sum of solid and liquid particles suspended in the air, is often divided into two main groups: the coarse fraction with a size ranging from 2.5 to 10 µm (PM10–PM2.5), and the fine fraction with a size smaller than 2.5 µm (PM2.5).
Dong, Jun +4 more
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International audience; Particulate matter (PM), defined as the sum of solid and liquid particles suspended in the air, is often divided into two main groups: the coarse fraction with a size ranging from 2.5 to 10 µm (PM10–PM2.5), and the fine fraction with a size smaller than 2.5 µm (PM2.5).
Dong, Jun +4 more
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Monitoring of particulate matter outdoors
Chemosphere, 2002Recent studies of the size and composition of atmospheric particulate matter (PM) have demonstrated the usefulness of separating atmospheric PM into its fine and coarse components. The need to measure the mass and composition of fine and coarse PM separately has been emphasized by research in exposure, epidemiology, and toxicology of atmospheric PM ...
Johann Engelbrecht +5 more
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Science, 1997
Consistent with Jocelyn Kaiser's News & Comment article “Showdown over clean air science” ([25 July, p. 466][1]), airborne particulate matter (PM) has been repeatedly associated with morbidity and mortality, even at concentrations well within the Environmental Protection Agency's (EPA's) 150-microgram per cubic meter (μg/m3) upper acceptability limit ...
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Consistent with Jocelyn Kaiser's News & Comment article “Showdown over clean air science” ([25 July, p. 466][1]), airborne particulate matter (PM) has been repeatedly associated with morbidity and mortality, even at concentrations well within the Environmental Protection Agency's (EPA's) 150-microgram per cubic meter (μg/m3) upper acceptability limit ...
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Characterization of Particulate Matter in California
Journal of the Air & Waste Management Association, 1999The size, composition, and concentration of particulate matter (PM) vary with location and time. Several monitoring/sampling programs are operated in California to characterize PM less than 2.5 and 10 µm in aerodynamic diameter (PM2.5 and PM10). This paper presents a broad summary of the spatial and temporal variations observed in ambient PM2.5 and ...
Nehzat Motallebi, Leon J. Dolislager
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Science, 1998
I mproved judgment is now influencing the quality of research conducted on health effects of airborne particulate matter. This is a consequence of congressional legislation requiring the Environmental Protection Agency (EPA) to contract for and to follow advice of the National Academy of Sciences (
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I mproved judgment is now influencing the quality of research conducted on health effects of airborne particulate matter. This is a consequence of congressional legislation requiring the Environmental Protection Agency (EPA) to contract for and to follow advice of the National Academy of Sciences (
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Toxicology of Ambient Particulate Matter
2012It is becoming increasingly clear that inhalation exposure to particulate matter (PM) can lead to or exacerbate various diseases, which are not limited to the lung but extend to the cardiovascular system and possibly other organs and tissues. Epidemiological studies have provided strong evidence for associations with chronic obstructive pulmonary ...
Maja Hullmann +2 more
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2003
AbstractThis chapter provides a general introduction to the assessment of particulate matter exposures in environmental epidemiological studies. It discusses strategies and methods used, and various samplers for monitoring. It provides various examples and references.
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AbstractThis chapter provides a general introduction to the assessment of particulate matter exposures in environmental epidemiological studies. It discusses strategies and methods used, and various samplers for monitoring. It provides various examples and references.
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Modeling exposure to particulate matter
Chemosphere, 2002Exposure assessment, a component of risk assessment, links sources of pollution with health effects. Exposure models are scientific tools used to gain insights into the processes affecting exposure assessment. The purpose of this paper is to review the process and methodology of estimating inhalation exposure to particulate matter (PM) using various ...
Sumeet Saksena +1 more
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Intestinal absorption of particulate matter
Life Sciences, 1977Abstract Evidence for and against the movement of intact particulates across the normal intestinal mucosa is reviewed. The effects of type of particulate and age of animal are considered. Small particulates unquestionably enter the gut-associated lymphoid tissues of adult animals and are engulfed by macrophages.
M.E. LeFevre, D.D. Joel
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