نتایج جستجو برای: heavy elements

تعداد نتایج: 395349  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Journal: :iranian journal of radiation research 0
m. ghorbani h. mozdarani dr. hossein mozdarani, school of medical sciences, tarbiat modarres university, p.o.box: 14115-111, tehran, i.r iran. fax: +98-21-8006544.

background: the method of proton induced x-ray emission (pixe) has been widely used as a sensitive technique to trace elemental analysis in both biological and medical fields. the sensitivity of this powerful method is in the order of ppm .the aim of this work is to analyze structural composition of 4 heavy trace elements with z greater than 24 (mn, fe, cu, zn) in two kinds of gallstones and to...

Journal: :تحقیقات نظام سلامت 0
رضا مورکیان مرکز تحقیقات امنیت غذایی، گروه صنایع غذایی، دانشکده تغذیه و علوم غذایی،دانشگاه علوم پزشکی اصفهان، اصفهان، ایران الهه رضایی مرکز تحقیقات امنیت غذایی، گروه صنایع غذایی ، دانشکده تغذیه و علوم غذایی ، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران لیلا آزادبخت دانشیار، مرکز تحقیقات امنیت غذایی،گروه صنایع غذایی، دانشکده تغذیه و علوم غذایی،دانشگاه علوم پزشکی اصفهان، اصفهان، ایران مریم میرلوحی استادیار، مرکز تحقیقات امنیت غذایی، گروه صنایع غذایی، دانشکده تغذیه و علوم غذایی،دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

in recent years, heavy metal contamination of rice in different parts of the world has raised concerns about its safety and provoked crisis in it's global production and trade. in iran, also some studies have reported on the heavy metal contamination of native products. however, the concentration of heavy metals in rice grain could be influenced through preparation and cooking. this study aimed...

A Adelkhah, F* Babaei Semiromi, S Alipour,

Background & objectives: Since many plants have high efficiency in absorbing heavy elements, the use of phytoremediation is of great importance. The purpose of this study is to identify native plants that absorb heavy metals. Also, the possibility of using them in phytoremediation technology in soils contaminated with heavy metals (around the petrochemical industry of Razi fertilizer in Tehran ...

2011
N. Schunck A. Baran M. Kortelainen J. McDonnell J. Moré W. Nazarewicz J. Pei J. Sarich J. Sheikh A. Staszczak M. Stoitsov

Reliable calculations of the structure of heavy elements are crucial to address fundamental science questions such as the origin of the elements in the universe. Applications relevant for energy production, medicine, or national security also rely on theoretical predictions of basic properties of atomic nuclei. Heavy elements are best described within the nuclear density functional theory (DFT)...

Journal: :international journal of environmental research 2014
r. pilarczyk

concentrations of major nutritional and trace elements (ca, p, mg, na, k, fe, zn, cu, mn, se,co, cr, ni, sr, ba) and toxic heavy metals (cd, pb) were analyzed in the meat of limousin, red angus andsalers bulls. elements were determined using inductively coupled plasma emission atomic spectrometry. theconducted research showed that the meat of compared breeds differed in the concentrations of cu...

Journal: :international journal of environmental research 2012
m. fazelzadeh a.r. karbassi m. mehrdadi

the present investigation provides a thorough study of eliminating soluble and colloidal elements of copper, iron, magnesium and zinc during estuarine mixing of gorganrood river water with caspian sea water in iran. the processes of flocculation were carried out in 10 aquariums in order to furnish the salinity in an interval of 0.3 - 4.4 ppt. the obtained result is indicative of non- conservat...

Journal: :journal of tethys 0

the objective of this study was to explore the application of hybrid artificial neural network methods to predict heavy metals in rainwater based on major elements. measurements of the heavy metals pb, cu, zn, as, ni, hg, and fe in soluble rain fractions were performed in rainwater collected at the arak plain during the rainy seasons of 2012. in the soluble fractions, the concentrations of the ...

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