نتایج جستجو برای: mercury concentration was measured in each sample by using atomic absorption tool
تعداد نتایج: 18714704 فیلتر نتایج به سال:
as some definitions show, idioms are expressions whose meanings cannot be obtained from individual words. in every society, people use their own conceptions and feelings through different idioms and expressions. so every culture and society has their own idioms. some scholars proposed methods for translating idioms but baker’s strategies are very important and constructive. this research tried ...
background: developmental activities especially the establishment of more than 20 industrial units in semnan province caused the officers worries about increased concentration of heavy metals in drinking water supplies and probably increasing of health risk at consumers. the aim of the study was to investigate the effect of semnan province industrial development on the health risk level caused ...
introduction: chlorine gas producting by mercury cell (chlor-alkali) is one of the most widely used methods. leakage and vaporizing mercury from cells can cause occupational poisoning. mercury is the most toxic non-radioactive heavy metal ; therefore measurement of air concentration of this metal is very important. the aim of this research was measuring ambient air mercury concentration in a pe...
the petrochemical industry is the most important and most widely active industries in the country. due to the variety and complexity of industrial products, it also produces a wild range of pollutants. mercury waste disposal from chlor-alkali units is one of the fundamental problems of this industry. various studies have shown that phytoremediation system for removal of mercury from aqueous sol...
introduction: dentists are exposed to mercury vapor from dental amalgam in their routine occupational practice; excess exposure to mercury is harmful. the aim of this study was to assess the influence of some possible related factors on the urine mercury levels of general dentists and restorative specialists in mashhad in 2010. materials and methods: this cross-sectional study was performed ran...
the following null hypothesis was proposed: h : there is no significant difference between the use of semantically or communicatively translates scientific texts. to test the null hypothesis, a number of procedures were taken first, two passages were selected form soyrcebooks of food and nutrition industry and gardening deciplines. each, in turn, was following by a number of comprehension quest...
in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...
In 2000, human skeletal remains were discovered in Split (Croatia). As archaeologists confirmed, it was an ancient skeleton accompanied by ceramics and bracelet characteristic for late Roman period whose possible violent death was excluded. The bone sample was radiocarbon dated by AMS to 1750 years. DNA was successfully extracted from the bone sample and subsequently typed using mt DNA and STR ...
ABSTRACT Background and Objective: There have been concerns over possible association between mercury and neurodevelopmental outcomes in infants. In this study we aimed to determine whether blood levels of mercury are above safe values in Iranian infants or not. Materials and Methods: A total of 85 infants (0, 2, 4 and 6 months old) were enrolled in this study. All of them received vaccin...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
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