particulate matter


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particulate matter

[pär′tik·yə·lət ‚mad·ər]
(physics)
matter in the form of small liquid or solid particles.
References in periodicals archive ?
Methods for measuring emissions of pollutants can be divided in principle into measuring of particulate matter and gaseous substances.
* Stay inside when levels of fine particulate matter are especially high.
"With this map and dataset in hand, epidemiologists can start to Look more closely at how Long-term exposure to particulate matter in rarely studied parts of the world--such as Asia's fast-growing cities or areas in North Africa with quantities of dust in the air--affect human health," according to a NASA statement.
Its function is to remove the particulate matter contained in diesel engine exhaust gas.
Awarded for: "Study on low temperature oxidation of diesel particulate matters by oxygen storage component for the catalyzed diesel particulate filter"
Emissions from commercial vehicles have already decreased substantially over the past decade, stresses the association, specifying that the most advanced trucks on the market produce 75% less NOx and 94% less particulate matter than Euro I trucks in 1991.
Particulate matter is fine liquid or solid particles such as dust, smoke, mist, fumes, and fog.
"PulsePleat elements can help to reduce particulate matter emissions by as much as 40 percent in the 3,000,000 units installed worldwide," said Daniel Heintzelman, president of GE Energy's services business.
Specifically, EPA applied, at least in part, 22--or about two-thirds--of the Academies' recommendations to its health benefit analysis of proposed revisions to particulate matter standards.
The Norwegian study found similar positive results: airborne particulate matter declined 70 percent in bars and restaurants, and nicotine levels in the urine of non-smoking workers decreased nearly 90 percent.
In most winter-air samples, a cubic meter contained 60 to 80 micrograms each of particulate matter, nitrogen oxides, and sulfur dioxide and about 150 nanograms of polycyclic aromatic hydrocarbons, exceeding common regulatory limits.
McGinty has awarded $30,000 to West Chester Area School District to purchase and install diesel filters on six school buses to help protect students' health by reducing harmful emissions from particulate matter, hydrocarbon and carbon monoxide.

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