نتایج جستجو برای: lead and cadmium
تعداد نتایج: 16850888 فیلتر نتایج به سال:
Heavy metals contamination is a major environmental problem which requires immediate human attention. The use of plant species to remove pollutants from soils, generally defined as phytoextraction. In order to evaluate phytoextraction of contaminated soils, a pot experiment conducted using two plants Barley, Canola three kinds of heavy metals (Cd, Pb, Ni) with 3 levels in a completely randomize...
Heavy metals contamination is a major environmental problem which requires immediate human attention. The use of plant species to remove pollutants from soils, generally defined as phytoextraction. In order to evaluate phytoextraction of contaminated soils, a pot experiment conducted using two plants Barley, Canola three kinds of heavy metals (Cd, Pb, Ni) with 3 levels in a completely randomize...
Heavy metal stress is an important factor which may influence plants’ growth and metabolism. The present study investigates the effects of cadmium (soil treated twice/ week with 10, 20 and 30 mM) on the specific activities of phosphatases which might lead to reducing power assay in Barley (Hordeum vulgare L, var 2052) seedling. A significant decrease in the redox potential of shoot compared to ...
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...
BACKGROUND Toxic element exposure and essential trace element consumption may have changed after the Chinese economy transformed to a market-oriented system.The objectives of this study were to measure urinary concentrations of toxic (arsenic,cadmium, lead) and essential trace (selenium, zinc, copper) elements among rural residents in Hainan, China and to examine if variations in economic devel...
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
The mechanisms by which iron is absorbed are similar to those of divalent metals, particularly manganese, lead, and cadmium. These metals, however, show different toxicokinetics in relation to menarche or menopause, although their interaction with iron is the same. This review focuses on the kinetics of these three toxic metals (manganese, lead, and cadmium) in relation to menarche, pregnancy, ...
One of the major global concerns about the environment is the pollution of aquatic ecosystems by heavy metals. These elements contaminate aquatic environments and accumulate and concentrate at through bioaccumulation in the tissues of living organisms at higher levels of the food chain consumed by humans. The aim of this study was to investigate the concentrations of three heavy metals, lead, n...
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