نتایج جستجو برای: long term metals concentration
تعداد نتایج: 1394329 فیلتر نتایج به سال:
in this research we have studied the effect of some transition-metals (cu, ag and au) substitutions on two-electron reduction potential of flavins by application of dft method. all geometries have been optimized at blyp level of theory and “6-31+g** + lanl2dz” mixed basis set. the frequency job at the same method and basis sets has been performed to obtain gibbs free energy of compounds. it h...
Development in sensitive watersheds continues to pose environmental problems for receiving waters. One contributor to this long-term pollution is building and other construction materials. However, the long-term effect of many building materials on the environment has not been quantified due to limited testing of these materials prior to sales and installation. Laboratory “leach” testing of com...
The monthly mean values of the atmospheric carbon dioxide concentration derived from in-situ air samples collected at Mauna Loa Observatory, Hawaii, during 1958– 2004 (the longest continuous record available in the world) are analyzed by employing the detrended fluctuation analysis to detect scaling behavior in this time series. 5 The main result is that the fluctuations of carbon dioxide conce...
we aimed to evaluate clinical, high resolution computed tomography (hrct) and pulmonary function test (pft) findings after 18-23 years of exposure in veterans of sulphur mustard (sm) exposure. we performed a cross-sectional study of 106 patients. inclusion criteria were 1: documented exposure to sm as confirmed by toxicological analysis of their urine and vesicular fluid after exposure 2: singl...
introduction: langerhans cell histiocytosis (lch) is a rare disease characterized by clonal prolifera-tion of histiocytosis in different tissues. permanent consequences (pc) described among subjects with langerhans cell histiocytosis (lch).in this study we report the prevalence of permanent sequel among long – term survivors of lch in our center. methods: we had 30 cases of lch from 1989 – 2001...
Exploring the homogenous regions for site specific management is important, especially in the areas under different anthropogenic activities. This was investigated using multi-way analysis including Factor Analysis, Hierarchical Clustering Analysis and k means in the areas under long-term wastewater irrigation over a period of more than 40 years, in Shahre Rey, south of Tehran. By using Factor ...
We are frequently asked, what does hair analysis reveal about heavy metals? First, heavy metals are so ubiquitous in our environment that everyone is exposed to them. They cannot be avoided completely and are found in virtually everyone to some degree. Most clinician’s are aware that hair tissue mineral analysis (HTMA) measures nutritional minerals and the heavy metals that are incorporated int...
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