نتایج جستجو برای: metal uptake
تعداد نتایج: 324877 فیلتر نتایج به سال:
اخیرا یک سری تحقیقات دامنه داری در زمینه ی تاثیرات پیچیدگی فعلیت محور(task complexity) بر روی تولید کلامی در قالب "صحت"ء "روانی" و "پیچیدگی" گفتار صورت گرفته است. هر چند تاثیرات "پیچیدگی فعلیت محور" برتعامل کلامی و "واکنش فراگیربه بازخورد تصحیح گر"(learner uptake) به ندرت مورد تحقیق قرار گرفته است. به منظور بررسی تاثیرات فعلیت محور بر روی واکنش فراگیر به بازخورد تصحیح گر 38زبان آموز مذکر در سطح...
An interweaving copper metal-organic framework possessing high porosity and high hydrogen uptake has been successfully designed and synthesized.
A novel, cost-effective and eco-friendly technologies are needed to remove Zinc from the contaminated soil environment. The present research study was designed to assess the naturally enhanced phytoextration and phytostabilization potential of different plant species from the Zinc (II) contaminated soil. Uptake of Zinc by plant species in a metal contaminated soil was studied in pot culture exp...
Iron (Fe) and zinc (Zn) deficiency is common in wheat growing areas of the world particularly in calcareous soils. Soil application of chemical fertilizers is considered as a cost-effective and easy approach to combat micronutrient deficiency. However, due to economic, environmental, and agronomic constrains, efficiency of soil fertilization is low in most calcareous soils. Therefore, finding p...
A High Cation Exchange Capacity (HCM) montmorillonite clay has been prepared by acetate treatment of Zenith clay. The HCM has been evaluated for metal-uptake from aqueous solutions. The present data show that the cation exchange sites can play a significant role in the adsorption of metals in smectite clays. A theoretical analysis scheme has been developed which shows that permanent-charge site...
Bioavailability of engineered metal nanoparticles affects uptake in plants, impacts on ecosystems, and phytoremediation. We studied uptake and translocation of Ti in plants when the main source of this metal was TiO2 nanoparticles. Two crops (Phaseolus vulgaris (bean) and Triticum aestivum (wheat)), a wetland species (Rumex crispus, curly dock), and the floating aquatic plant (Elodea canadensis...
Recent studies have shown that overexpression of the transmembrane protein Zrt- and Irt-like protein 14 (Zip14) stimulates the cellular uptake of zinc and nontransferrin-bound iron (NTBI). Here, we directly tested the hypothesis that Zip14 transports free zinc, iron, and other metal ions by using the Xenopus laevis oocyte heterologous expression system, and use of this approach also allowed us ...
This article reviews the literature on the use of mosses for monitoring atmospheric metal pollution. It discusses the nature of mosses, the mechanisms for moss uptake of metals from the air and wet precipitation, the various forms in which mosses are used for this purpose, and cases in which mosses have been used for monitoring local hot spots of pollution, and regional patterns of metal pollut...
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