نتایج جستجو برای: Copper Concentration
تعداد نتایج: 456543 فیلتر نتایج به سال:
abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...
a novel and ultra low cost isfet electrode and measurement system was designed for isfet application and detection of hydronium, hydrazinium and potassium ions. also, a measuring setup containing appropriate circuits, suitable analyzer (advantech board), de noise reduction elements, cooling system and pc was used for controlling the isfet electrode and various characteristic measurements. the t...
abortion is the termination of a pregnancy by the removal or expulsion of a fetus or embryo from the uterus, resulting in or caused by its death. missed abortion is the most common dangerous condition in pregnancy. an abortion can occur due to maternal complications, chronic disease, endocrine disorders, abortificient drugs, radiation, heavy metals and toxins. the study population consisted of ...
various concentrations of copper are embedded into silica matrix to xerogel form using copper source - cu(no3)2∙3h2o. the xerogel samples are prepared by hydrolysis and condensation of tetraethyl orthosilicate (teos) by the sol-gel method and with determination of new molar ratio of components h2o/teos to be 6.2. in this investigation, the necessary amount of trihydrated copper nitrate is adde...
We studied effects of free copper ion activity and total copper concentration on copper uptake by lettuce from nutrient solution and a model was developed. In ethylenediaminetetraacetic acid and dissolved organic matter treatments, when pH and free copper ion activity were the same, root copper concentration did not change with the total copper concentration. However, at fixed pH and total copp...
copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.
background: to determine the protective impact of efficient serum copper concentration on bmd in women and to asses its impression on bone. methods: six hundred healthy women through a national project in iran, imos, were selected via a cluster random sam pling and enrolled the study. they were divided to pre menopausal (404/600, 67.7% of total) and post menopausal (190/600, 32%of total) groups...
we studied cu concentration on part of aras riparian vegetation. cu was selected as an index metal due to polluting the aras river through agarak copper mines drainage. results of cu concentration in indicator plant have been examined using spss16. considering the situation of the copper mines as well as the habitat of the indicator plant, two stations before and after the exit of the industria...
background: the trace element copper has been identified as a highly toxic element for sperm. it is known to affect sperm motility in humans and experimental implantation of copper in the epididymis vas deferens and scrotum of mammals has been demonstrated to affect fertility detrimentally. objective: sperm concentration motility vitality and morphology are parameters used to evaluate potential...
Primary chronic forms of copper poisoning have been reported to occur in goats around the copper industries in Kerman province. The survey was carried out from autumn 2015 to the end of summer 2016, in Kerman province, Iran. Based on clinical signs, confirmed by necropsy and copper concentration of serum and different tissues, ten live chronic copper poisoned (CCP) goats were used in the study ...
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