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博文

目前显示的是标签为“Particulate Matter”的博文

Age, Race and Gender Spatiotemporal Disparities of COPD Emergency Room Visits in Houston, Texas

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53779#.VNMYOizQrzE Author(s)   Faye Anderson * , Arch Carson , Lawrence Whitehead , Keith Burau Affiliation(s) Texas A & M AgriLIFE Research Center, Beaumont, Texas, USA . ABSTRACT Chronic obstructive pulmonary disease (COPD) is one of the major causes of morbidity and mortality in the United State. The investigation of the continuing increase in its prevalence and mortality has increased attempts to further understand its causes and how to manage it. Understanding the spatial and temporal distribution of COPD emergency room (ER) visits in Harris County (Houston) can guide these efforts in a uniform yet diverse setting like this one. The objectives of this study were to identify the temporal and spatial variations of COPD emergency room visits adjusted by age, gender, ethnicity, day of the week, month, and year, and to estimate the odds ratio of ...

Distribution and Characterization of PM10 in City and Valley of Mexicali, Baja California, Mexico

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53233#.VLh0wcnQrzE Author(s)    Miguel Canales-Rodríguez 1* , Margarito Quintero-Núnez 1 , Benjamin Valdés-Salas 1 , Walter Daessle-Heuser 2   Affiliation(s) 1 Departament of Environment, Institute of Engineering, Autonomous University of Baja California, Mexicali, México . 2 Deparment of Environmental Geosciences, Institute of Oceanological Research, Autonomous University of Baja California, Ensenada, Mexico . ABSTRACT The variability of the levels of atmospheric particulate matter PM 10 and its composition is assessed in the rural and urban zones of Mexicali during fall and winter 2008-2009, using a low level volume Minivol sampler, with quartz and Teflon filters. During fall the Mexican norm was exceeded (120 μ g/m 3 in 24 hr) in only two occasions, while in winter it was exceeded twelve times. The predominant component in fall was geological ...