نتایج جستجو برای: fractionated particulate matter

تعداد نتایج: 237002  

2006
J. D. Wanjura

Recent air quality legislation has placed increased pressure on agricultural producers in several states across the US. In particular, California removed the exemption for agricultural sources from air quality permitting in 2003. Through the use of inaccurate particulate matter emission factors, agricultural operations have been targeted as significant sources of particulate matter emissions. T...

2017
Mike Z. He Xiange Zeng Kaiyue Zhang Patrick L. Kinney

Background: Particulate matter pollution has become a growing health concern over the past few decades globally. The problem is especially evident in China, where particulate matter levels prior to 2013 are publically unavailable. We conducted a systematic review of scientific literature that reported fine particulate matter (PM2.5) concentrations in different regions of China from 2005 to 2016...

Journal: :WMJ : official publication of the State Medical Society of Wisconsin 2009
Jeff Havlena Marty S Kanarek Margie Coons

CONTEXT Aggregate blood lead testing data for Wisconsin children younger than age 6 exhibit seasonal trends in both average blood lead levels and in the percent of those tested and found to have blood lead levels in excess of the 10 mcg/dL threshold for poisoning. Blood lead levels and poisoning rates typically peak during the late summer and early fall months, and are at their minimum during t...

2015
Wenjing Ji Bin Zhao

Following an extensive review of the literature, we further analyze the published data to examine the health effects of indoor exposure to particulate matter (PM) of outdoor origin. We obtained data on all-cause, cardiovascular, and respiratory mortality per 10 μg/m3 increase in outdoor PM10 or PM2.5; the infiltration factors for buildings; and estimated time spent outdoors by individuals in th...

Journal: :Journal of environmental quality 2008
April L Hiscox David R Miller Britt A Holmén Wenli Yang Junming Wang

The frequency and intensities of dust exposures in and near farm fields, which potentially contribute to high intensity human exposure events, are undocumented due to the transient nature of local dust plumes and the difficulties of making accurate concentration measurements. The objective of this study is to measure near-field spatial concentrations of the dust plumes emitted during tilling an...

2018
Jianzheng Liu Weifeng Li Jiansheng Wu Yonghong Liu

The Beijing-Tianjin-Hebei area faces a severe fine particulate matter (PM2.5) problem. To date, considerable progress has been made toward understanding the PM2.5 problem, including spatial-temporal characterization, driving factors, and health effects. However, little research has been done on the dynamic interactions and relationships between PM2.5 concentrations in different cities in this a...

Ahmad Reza Yari, Gholamreza Goudarzi, Majid Farhadi, Maryam Dastoorpoor, Mehdi Vosoughi, Mohammad Javad Mohammadi, Morteza Jafari, Sahar Geravandi,

Background & Aims of the Study: According to statistics reported by the international organization, 500,000 people annually due to airborne particulate matter exposure of the air are dying prematurely. Studies show the dust storm is responsible for the 7.1 % increase of fatality. Control of particulate matter is one of the most important methods of direct and indirect effects of par...

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