نتایج جستجو برای: according to various pollution sources
تعداد نتایج: 10744379 فیلتر نتایج به سال:
1.1 introduction “i see translation as the attempt to produce a text so transparent that it does not seem to be translated. a good translation is like a pane of glass. you only notice that it’s there when there are little imperfections- scratches, bubbles. ideally, there shouldn’t be any. it should never call attention to itself.” “norman shapiro” (venuti, 1995:1) edward fitzgerald is the br...
Introduction Perfluorinated compounds (PFCs) have been detected from various environmental matrices even in Arctic, and known to be ubiquitous pollutants. Fluorotelomer alcohols (FTOHs) and fluorooctane sulfonamidoethanol (FOSE), which can be degraded to perfluorooctanoate (PFOA) and perfluorooctane sulfonate (PFOS), respectively, spread to all over the globe through atmosphere and are consider...
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Background and objectives: Tehran is one of the most polluted cities in the world in terms of air pollution. Modeling is a useful tool in air pollution management. The objectives of this study are to determine the distribution of the main air pollutants concentration in Tehran and to construct a photochemical model appropriate to the geography and natural characteristics of Tehran. Methods: I...
the centralization of human activities is associated with different pollutants which enter into environment easily and cause the urban environment more vulnerable. regarding the importance of air pollution issue for tehran metropolis, many plans and regulations have been developed. however, most of them failed to decline the pollution. the purpose of this study was to pathologically analyze air...
Numerical modeling is carried out to investigate the spreading pattern of industrial wastewater released from coastal refineries and power plant into thePersian Gulf. The pollutant sources due to the wastewater outfall of the coastal industrial plants are completely considered in the model. The effects of sources are inspected on the adjacent marine environment. The numerical model is developed...
BACKGROUND Salamanca, Mexico occupied fourth place nationally in contaminating emissions. The aim of the study was to determine the impact of air pollution on the frequency of pulmonary function alterations and respiratory symptoms in school-age children in a longitudinal repeated-measures study. METHODS We recruited a cohort of 464 children from 6 to 14 years of age, from two schools differi...
Background and Objectives: The dust pollution in the air of cities is one of the environmental problems in the western and southwestern regions of Iran, which can have many effects on the environment and human life. The purpose of this study is the assessment of dust pollution, the effect of climatic parameters on it and the field of view in the southwestern regions of Iran. Methods: In this st...
objective: metal concentrations in 53 soil samples of shahr-e-babak were determined. methods: assessment of enrichment factor and geo-accumulation index revealed higher degree of contamination of cd, pb, and cu in soil samples. moreover, results of metal fractionation study revealed high amount of cd and pb are associated in weakly bounds may lead to environmental risk of these metals. result...
Chemometrics is a scientific discipline closely connected with statistics and mathematics. It has an important role in analytical chemistry. Modern analytical methods provide opportunity to collect large amounts of data for various samples. For handling analytical results different chemometric methods are employed, such as basic statistical methods for the determination of mean and median value...
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