نتایج جستجو برای: lead and zinc
تعداد نتایج: 16860712 فیلتر نتایج به سال:
the research questions were as follows: 1. is there any relationship between the students concious awareness of the form and implications of the conjuncations and their improvement in using appropriate conjunctions? 2. does students knowledge of the from and the implications of the conjunctions help them to produce more coherent writings. 3. does a comparison between english conjunctions and th...
Bama is one of the major concentrating plant in Iran which treats nearly 1500 tons per day sulphidic lead and zinc ore. Large amount of oxidized ore exist in Bama which has been extracted along with sulphidic ore. The main objective of the present investigation was the up-grading of the ore from Goshfil which is the major deposit in Bama. The ore contained about 16% zinc as smithsonite, about 1...
in this research a pot experiment was carried out to investigate the remediation ability of e. camaldulensis dehnh inlead-zinc (pb-zn) contaminated soil. the study also investigated the effects of ethylenediaminetetraacetic acid(edta) and diethylenetrinitrilopentaacetic acid (dtpa) on the phytoremediation efficiency of the plant species, andharvest time as a suitable dose of chelating agents wa...
heavy metal accumulation in the aquatic ecosystems is a main concern which threats human health. in this study two commercial fish species, rutilus kutum and chelon aurata were selected for assessing heavy metal (cd, pb, zn) concentrations in gill and liver tissues at babolsar’s coast, the southern caspian sea, iran. babolsar is one of the important fishery stations in the southern caspian sea....
Zinc and lead are the two most widely used non-ferrous metals after aluminium and copper as vital materials in everyday life. They are mined and smelted in many countries in both the developed and developing world. Both pyrometallurgical as well as hydrometallurgical methods are used for production of lead zinc depending on the type of raw material used as a charge. In the pyrometallurgical pro...
Introduction:Lead and zinc are among the most poisonous unnecessary heavy metals available in the environment and are among the first grade poisonous pollutants. In this study the efficiency of electrocoagulation process using alternating and direct current and iron and stainless steel rods for elimination of lead and zinc from battery industrial wastewater has been investigated. Methods:Wa...
background: lead toxicity has been reported to affect hematopoietic, nervous, reproductive, cardiovascular and urinary tract systems. many investigators have so far studied the effects of high blood lead levels on pregnancy outcomes. objective: to investigate the effects of elevated maternal blood lead during pregnancy on some trace elements and pregnancy outcomes. methods: blood lead and plasm...
this study investigates the relationship between field-related cognitive styles and global reading comprehension of hypertext. technically, field dependency is prevailing dominance of field on perception of parts, while global comprehension is skim-like reading to grasp the general content. in this research project, 60 senior and junior students of arak university majoring in english literature...
The removing zinc cation from aqueous solution by Ca-bentonite and Na-exchanged bentonite was studied. The factors such as the initial concentration of Zn, the liquid-to-solid ratio, pH, adsorption time, stirring speed, coexisting ions, temperature and bentonite particle size were investigated. The results show that the adsorption process of bentonite accorded with the Freundlich isotherm model...
ZINCPharmer (http://zincpharmer.csb.pitt.edu) is an online interface for searching the purchasable compounds of the ZINC database using the Pharmer pharmacophore search technology. A pharmacophore describes the spatial arrangement of the essential features of an interaction. Compounds that match a well-defined pharmacophore serve as potential lead compounds for drug discovery. ZINCPharmer provi...
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