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Quantitative structures of the fully hydrated fluid phases of dimyristoylphosphatidylcholine (DMPC) and dilauroylphosphatidylcholine (DLPC) were obtained at 30 degrees C. Data for the relative form factors F(q(z)) for DMPC were obtained using a combination of four methods. 1), Volumetric data provided F(0). 2), Diffuse x-ray scattering from oriented stacks(More)
Arrays of bilayers of the lipid dimyristoylphosphatidylcholine (DMPC) exhibit anomalous swelling as the temperature decreases from T=27 degrees C toward the main phase transition at T(M) =24 degrees C, within the fluid L(alpha) thermodynamic phase. Analysis of diffuse x-ray scattering data from oriented stacks of biological lipid bilayers now makes it(More)
A simple statistical method is described for identifying the likely importance of local sources of PM2.5 in a region on days when the National Ambient Air Quality Standard is exceeded. The method requires only PM2.5 mass concentration and wind direction data, and makes use of the EPA database on PM2.5 emissions in the local region of interest. The method(More)
BACKGROUND Braddock, Pennsylvania is home to the Edgar Thomson Steel Works (ETSW), one of the few remaining active steel mills in the Pittsburgh region. An economically distressed area, Braddock exceeds average annual (>15 μg/m3) and daily (>35 μg/m3) National Ambient Air Quality Standards (NAAQS) for particulate matter (PM2.5). METHODS A mobile air(More)
[5]) show that exposure to particulate matter(or PM, which is a complex mixture of extremely small particles and liquid droplets in the air) have various short-term and long-term health effects, e.g.: 1. associations between daily average ambient PM concentrations and corresponding cardiopulmonary mortality, morbidity, and functional impairments; 2.(More)
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