منابع مشابه
Effects of common groundwater ions on chromate removal by magnetite: importance of chromate adsorption.
BACKGROUND Reductive precipitation of hexavalent chromium (Cr(VI)) with magnetite is a well-known Cr(VI) remediation method to improve water quality. The rapid (<a few hr) reduction of soluble Cr(VI) to insoluble Cr(III) species by Fe(II) in magnetite has been the primary focus of the Cr(VI) removal process in the past. However, the contribution of simultaneous Cr(VI) adsorption processes in ag...
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this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...
15 صفحه اولChromate Adsorption by Kaolinite
Chromate (CrO4 2-) adsorption was investigated on kaolinite (0.2-2 ~m) saturated with NaC104 over a range of pH. Adsorption increased with decreasing pH because of protonation of chromate and/ or variable charge sites on kaolinite. Chemical pretreatment to remove noncrystalline and crystalline oxide contaminants affected the magnitude ofCrO42adsorption, but not the pH range over which CrO42adso...
متن کاملStudies on polynucleotides, lxviii the primary structure of yeast phenylalanine transfer RNA.
Following the pioneering work of Holley and co-workers' on yeast alanine tRNA,' nucleotide sequences of two similar serine tRNA's3 and of one tyrosine tRNA4 from yeast have been reported. The present report contains a brief account of the work leading to the elucidation of the nucleotide sequence of yeast phe-tRNA. Purification and Nucleotide Composition.-The method used for the purification of...
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ژورنال
عنوان ژورنال: The Philosophical Magazine
سال: 1827
ISSN: 1941-5850,1941-5869
DOI: 10.1080/14786442708674326