This paper analyzes day-of-week variations in concentrations of particulate matter (PM) in California. Because volatile organic compounds (VOCs) and oxides of nitrogen (NOx) are not only precursors of ozone (O3) but also of secondary PM, it is useful to know whether the variations by day of week in these precursors are also evident in PM data. Concentrations of PM < or = 10 microm (PM10) and < ...

Particulate Matter (PM) has a significant impact on human health and increases the risk of respiratory diseases. PM exposure is linked to various illnesses, including cardiovascular diseases, cancer, neurological pregnancy complications, contributes both mortality morbidity globally. can also influence autonomic nervous system. The evidence suggests that likelihood developing lung cancer contin...

BACKGROUND Exposure to the particulate matter produced in underground railway systems is arousing increasing scientific interest because of its health effects. The aim of our study was to evaluate the airborne concentrations of PM10 and three sub-fractions of PM2.5 in an underground railway system environment in proximity to platforms and in underground commercial areas within the system, and t...

BACKGROUND Increasing evidence suggests that obesity may impart greater susceptibility to adverse effects of air pollution. Particulate matter, especially PM(2.5) (particulate matter with aero-dynamic diameter </=2.5 microm), is associated with increased cardiac events and reduction of heart rate variability (HRV). OBJECTIVES Our goal was to investigate whether particle-mediated autonomic mod...

OBJECTIVE To examine the relationship between the mean daily concentration of respirable particles arising from bushfire smoke and hospital presentations for asthma. DESIGN AND SETTING An ecological study conducted in Darwin (Northern Territory, Australia) from 1 April - 31 October 2000, a period characterised by minimal rainfall and almost continuous bushfire activity in the proximate bushla...

The relationship between stroke and air pollution has not been adequately studied. We conducted a time-series study to examine the evidence of an association between air pollutants and stroke over 4 years (January 1995-December 1998) in Seoul, Korea. We used a generalized additive model to regress daily stroke death counts for each pollutant, controlling for seasonal and long-term trends and me...

during the last years, several exceedances of pm10 and benzo(a)pyrene limit values exceedances were recorded in taranto, a city in southern italy included in so-called areas at high risk of environmental crisis because of the presence of a heavy industrial district including the largest steel factory in europe. a study of these critical pollution events showed a close correlation with the wind ...

Air Pollution is one of the severe hazards which affect health quality all living beings and environment itself, especially in urban areas. It creates significant issues many countries harms human if its concentration exceeds tolerable levels. Monitoring these pollutants their concentrations a crucial preventative measure to alert public air area. The primary objective this paper design smart p...

___ ____________ _ Six types of commercially available arterial screen filters ranging from 20 to 40 microns pore size were evaluated for their efficiency in removing particulate matter. Five filters of each of these six commercial types were tested, for a total of thirty filters. Three sizes of polystryene microspheres ranging from 25 to 53 microns in diameter were used to simulate particulate...