نتایج جستجو برای: water and biological samples
تعداد نتایج: 16976865 فیلتر نتایج به سال:
1Dipartimento di Fisica and CNISM, Università di Messina, I-98166 Messina, Italy 2Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 3Dipartimento di Scienze degli Alimenti e dell’ Ambiente, Università di Messina, I-98166 Messina, Italy 4William Fairfield Warren Distinguished Professor; Professor of Physics; Professor of Chemistry; Pro...
abstracta novel floatation-spectrophotometric extraction method was developed for the recovery of tin (ii) from aqueous samples prior to determination by uv spectrophotometric detection. the method is based on the formation of a complex between tin (ii) and kalmagyte in ph=8. the complex is floated in the interface of n-hexane and aqueous phases. after removing the aqueous phase, the floated pa...
Background and Objective: Chahnimeh water reservoirs in Sistan and Baluchestan Province are the most important sources for drinking water and irrigation purposes. Many factors such as precipitation, the geography of the watershed, atmosphere, geology and Human activities affect on the chemical, physical, and biological compositions of Chahnimeh water reservoirs. Therefore, the main goal of the ...
during 2010-2011 a faunistic survey was carried out for collection and identification of edaphic mesostigmatic mites (acari: mesostigmata) in jiroft and suburb. mites were extracted from soil samples by berlese funnel. the mites were cleared in nesbit fluid and were mounted in hoyer medium on microscopic slides. in this study 43 spices from 26 genera and 16 families were collected and identifie...
4-chloro-2-methylphenoxy acetic acid (mcpa) is one of the most important pesticides which is extensively used to control weeds in arable farmland. exposure to this compound occurs in general population and persons who occupationally handle it. the aim of this present work was the preparation of mcpa imprinting polymer and its application as a selective sample preparation technique for trace det...
the aim of this study was to determine the concentration of free residual chlorine in the effluent at different concentrations of chlorine injection, between 50 to 350 ppm, at the ph levels of 6, 6.5 and 7 and the effect of chlorination on ph, electrical conductivity and the concentration of total dissolved solids in drinking water and effluent. the results showed that the concentration of free...
In natural resources, economic evaluation is poor in terms of study due to the uncertainty of non-consuming value of resources. In the present study, the evaluation of water, soil and plant resources in watershed management projects and expert questioning was done to enable the projects to be evaluated and prioritized economically. Three sub-watersheds were selected from the Parcel A ...
background: rivers and streams are important sources of surface waters. water quality of these resources depends on many factors including hydrologic, physicochemical and biological factors. these resources are important in terms of social, economic and political development.. zayanderood river is the only river in central basin of iran that has permanent fresh water. this river has an importan...
Textile wastewater contains substantial pollution loads in terms of Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS) and heavy metals. Phytoremediation used for removing heavy metals and other pollutants by aquatic macrophytes treatment systems (AMATS) is well established environmental protective technique. A lab scale stud...
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