نتایج جستجو برای: photochemical oxidants
تعداد نتایج: 17999 فیلتر نتایج به سال:
Smoking is considered a coping behavior for stress. On the other hand, pollutants and climatic conditions are environmental stressors that can have negative impact on health. Therefore, there may be link between regional smoking rate air pollution conditions. To clarify relationship in Japan such as photochemical oxidants concentration, ambient temperature relative humidity, multiple regression...
The evaluation of adverse health effects resulting from exposure to relatively low levels of ambient air pollution is currently a major concern. By using methodology that directly addressed the time series nature of data, this study investigated the association between ambient air pollution and respiratory symptoms and eye, nose, throat irritation symptoms. Health effects were determined by usi...
BACKGROUND Numerous earlier studies examining the association of air pollution with maternal and foetal health estimated maternal exposure to air pollutants based on the women's residential addresses. However, residential addresses, which are personally identifiable information, are not always obtainable. Since a majority of pregnant women reside near their delivery hospitals, the concentration...
Data from a recent field campaign in Mexico City are used to evaluate the performance of the EPA Federal Reference Method for monitoring the ambient concentrations of NO2. Measurements of NO2 from standard chemiluminescence monitors equipped with molybdenum oxide converters are compared with those from Tunable Infrared Laser Differential Absorption Spectroscopy (TILDAS) and Differential Optical...
Introduction: Human and environment exposed to harmful factors, as the result of industrial pollutants. Volatile organic compounds (VOCs) play important role in photochemical reactions in troposphere layer of atmosphere and results in production of ozone and photochemical oxidants. .Material and Method: In this study, a miniature stirred tank bioreactor was designed for treatment of waste gas...
The respiratory status of residents of three areas exposed to (1) photochemical oxidants (Burbank, Calif), (2) sulfur dioxide, parliculates, and hydrocarbons (Long Beach, Calif), and (3) low levels of pollutants (Lancaster, Calif) was determined using a modified National Heart and Lung Institute questionnaire, electronic volume spirometric studies, the single-breath nitrogen washout test, and b...
During the first ten years of the SOS program, the major focus in research was on regional oxidant (especially ozone) pollution and the earliest objectives were to identify ozone-related chemical and meteorological factors that were unique to the SOS region – such as the large quantities of biogenic VOC emissions, greater frequencies of air stagnation days, and abundant NOx-producing lightning ...
Physiological research directed upon the activity of'isolated chloroplasts has been spurred by the belief that the photochemical activity which chloroplasts exhibit in vitro is part of photosynthesis. If this is so, then those components of the photosynthetic apparatus which are active in isolated chloroplasts can thus be brought into closer range for study. The object of the present work was t...
Ambient concentrations of reactive nitrogen compounds as well as total NO, were measured during June and early July 1992 at a rural site, site SONIA, in the central Piedmont region of North Carolina as a part of the Southern Oxidants Study. The measurements of reactive nitrogen species were made in an effort to provide a comprehensive understanding of nitrogen chemistry and to investigate the t...
During the first ten years of the SOS program, the major focus in research was on regional oxidant (especially ozone) pollution and the earliest objectives were to identify ozone-related chemical and meteorological factors that were unique to the SOS region – such as the large quantities of biogenic VOC emissions, greater frequencies of air stagnation days, and abundant NOx-producing lightning ...
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