نتایج جستجو برای: reduction of pollutant
تعداد نتایج: 21188769 فیلتر نتایج به سال:
A Bayesian approach was applied to river water quality modeling (WQM) for load and parameter estimation. A distributed-source model (DSM) was used as the basic model to support load reduction and effective water quality management in the Hun-Taizi River system, northeastern China. Water quality was surveyed at 18 sites weekly from 1995 to 2004; biological oxygen demand (BOD) and ammonia (NH(4)(...
BACKGROUND Studies in Asia, Europe, and the Americas have provided evidence that ambient air pollution may have an adverse effect on birth weight, although results are not consistent. METHODS Average exposure during pregnancy to five common air pollutants was estimated for births in metropolitan Sydney between 1998 and 2000. The effects of pollutant exposure in the first, second, and third tr...
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BACKGROUND Environmental pollutants are thought to be one of major triggers of atopic dermatitis (AD). OBJECTIVE We attempted to evaluate the clinical effects of environment with low indoor pollutant levels on AD management. METHODS Fifty-one children (mean age 1.7 years) with moderate to severe AD who failed to show improvement with conventional management were recruited. Disease severity ...
Background and purpose: Formaldehyde is colorless gaseous material with strong and irritant odour. Ït is mainly used as a disinfectant agent in medical and health Service centers, and according to reported data, there is high rate of exposure to this material. Ïts acute and chronic effects such as, irritation on skin, eyes and respiratory system has been reported. There are data indicating it...
This paper proposes a comprehensive cost-effectiveness analysis to evaluate environmental policies. While effectiveness is measured as the reduction of different pollutants aggregated to a damage index, all the other effects apart from pollutant reduction are monetarised and expressed as cost. The damage index is based on the ‘Umwelt-BelastungsPunkte’ (UBP)-method (Environmental Impact Points) ...
In recent decades, rising greenhouse gas emissions have become a major challenge and concern. Environmental pollution is one of the greatest human challenges of the 21st century. Improving the performance of internal combustion engines and reducing the amount of pollutant emissions has always been a concern for researchers. The use of alternative fuels and the control and adjustment of the lamb...
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