نتایج جستجو برای: heavy trace elements

تعداد نتایج: 449046  

Introduction: Inappropriate management of mining activities may bring about water pollution and pose a heavy complication on aquatic ecosystem and humans. The study aimed to evaluate the effect of Qorveh gold mining activities on the quality of nearby groundwater. Materials and Methods: The concentration of seven eco-toxic metals along with some general hydrochemical parameters were investigat...

اصفهانی زاده, محمدحسین, باقری, غلامعلی, صالحی فر, ابراهیم, قلی پور, محمد, محمدی, زهرا , مشرفی, بهناز , پورعلی, افلاطون, کریم زاده, لاله,

Background and purpose: The main source of trace elements in plants is soil and nutrients of their growth medium. On the other hand, growth of tea is affected by some variables such as relative humidity of weather, temperature difference between day and night and and length of the day which are different in each season. This study aimed to investigate the effects of harvest time on tea leaf hea...

Journal: :محیط شناسی 0
رضا حسن زاده کارشناس ارشد زمین شناسی زیست محیطی. دانشگاه شهید باهنر کرمان.–مرکز بین المللی علوم، تکنولوژی پیشرفته و علوم محیطی احمد عباس نژاد استادیار بخش زمین شناسی دانشگاه شهید باهنر کرمان محمد علی حمزه کارشناس ارشد زمین شناسی زیست محیطی، کارشناس مؤسسه ملی اقیانوس شناسی

in this article, groundwater samples in urban areas of kerman studied to assess the degree of pollution by heavy metals and major ions and other water quality parameters as a consequence of geology and anthropogenic sources. 43 samples were collected and analyzed by graphite furnace atomic absorption spectrometry, titration and potentiometery for some heavy metals (cd, cr, cu, mn, pb and zn), m...

Journal: :modares journal of medical sciences: pathobiology 2010
lida moghadam banaem elahe seddighi looye anoushirvan kazemnejad azam afshar

objective: considering the various evidences due to effects of trace elements on the outcome of pregnancy, we decided to assess the effect of these elements levels in maternal and cord serum on low birth weight. materials and methods: an analytical cross-sectional study was performed on 344 pregnant women in labour and their neonates in maryam, akbarabadi and vali-e-asr hospitals in tehran, ir...

Journal: :iranian journal of radiation research 0
k. moosavi van de graff laboratory, nuclear science research school, nuclear science and technology research institute (nstri), tehran, iran s. vatankhah van de graff laboratory, nuclear science research school, nuclear science and technology research institute (nstri), tehran, iran j. salimi vascular surgery department, sina hospital, tehran university of medical sciences, tehran, iran m. moradi van de graff laboratory, nuclear science research school, nuclear science and technology research institute (nstri), tehran, iran

background: proton induced x-ray emission (pixe) has been applied as reliable and improved techniques in this study to compare concentration of various trace elements in normal and abnormal varicose veins. materials and methods: five samples from normal veins and 13 samples from varicose veins bombarded by 2.0 mev energy proton beams produced by a van de graff accelerator in vacuum. two specime...

Journal: :international journal of environmental research 2009
a.i. al-juboury

twenty samples of the recent sediments were collected from the tigris river and some of its tributaries of northern iraq and twelve samples from the miocene and quaternary sediments. the study is conducted to define and assess the paleoenvironmental pollution by some heavy metals in these sediments in order to elucidate the probable source rocks and the main mineral phases suggested to be a sou...

Journal: :iranian biomedical journal 0
عیسی نورمحمدی issa nourmohammadi حسن احمدوند hassan ahmadvand محمد تقی خانی mohammad taghikhani

there have been much speculation and debate concerning the effect of electromagnetic fields (emf) on body systems. various reports have implicated excessive exposure to emf to certain forms of leukemia. it has also been reported that emf may cause alteration in the levels of certain macro- and micro-nutrients such as copper, zinc, selenium, calcium and iron. we have undertaken this study to det...

Journal: :journal of advances in environmental health research 0
borhan mansouri student research committee, kurdistan university of medical sciences, sanandaj, iran afshin maleki environmental health research center, kurdistan university of medical sciences, sanandaj, iran; e-mail: [email protected]; behroz davari environmental health research center, kurdistan university of medical sciences, sanandaj, iran; e-mail: [email protected] namamali azadi biostatistics department, school of public health, iran university of medical sciences, tehran, iran mohammad amin pordel student research committee, kurdistan university of medical sciences, sanandaj, iran

this research aims  to monitor the trace elements content (cr, cu, pb, cd, ag, al, mn, mg, zn and fe) in the tissues of the muscle and liver of silver carp (h. molitrix ) and stone moroko (p. parva) from zarivar wetland in western iran. this research was cross-sectional. the research specimen  was fish caught from zarivar wetland. metal concentration analysis was carried out utilizing an  icp. ...

Journal: :international journal of environmental research 0

concentrations of 42 trace elements, including rare earths, in croatian thermal waters wereinvestigated. originating from different parts of croatia, i.e. different types of aquifers, studied thermal watersprovide insight into the range of concentrations of broad spectrum of elements in croatian thermal waters.covering a wide range of temperature (30 - 92 °c), studied thermal waters are general...

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