منابع مشابه
On Reduction of Ammonium Molybdate in Acid
Ammonium molybdate, in acid solution, is reduced to an oxide stage, with the production of a blue color, by many substances of biological importance. Our attention was first attracted to this subject through an accidental observation. We were engaged in the attempt to work out a technique for the nephelometric estimation of phosphoric acid, using a heavy solution of cane sugar for the medium of...
متن کاملSimultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite
A natural zeolite (Z-N), rich in clinoptilolite, was modified (Z-Al) by incorporation of hydrated aluminum oxide (HAlO) for the simultaneous phosphate and ammonium removal. The incorporation of surface hydroxyl groups (≅Al-OH) into the zeolite structure, as active groups for phosphate removal, was characterized by acid-base titrations (pHPZC=4.5±0.2). The phosphate sorption increases from 0.6 m...
متن کاملModified Biginelli condensation by molybdate sulfuric acid as a powerful and reusable catalyst
Molybdate sulfuric acid (MSA) has been prepared and used as catalyst for the Biginelli synthesis of some quinazolinones/thiones under solvent-free conditions. The catalyst loading is low and it shows recyclability. This method has advantages such as avoidance of the organic solvents, high yield of pure products, short reaction times and operational simplicity.
متن کاملModified Biginelli condensation by molybdate sulfuric acid as a powerful and reusable catalyst
Molybdate sulfuric acid (MSA) has been prepared and used as catalyst for the Biginelli synthesis of some quinazolinones/thiones under solvent-free conditions. The catalyst loading is low and it shows recyclability. This method has advantages such as avoidance of the organic solvents, high yield of pure products, short reaction times and operational simplicity.
متن کاملAmmonium production in sediments inhibited with molybdate: implications for the sources of ammonium in anoxic marine sediments.
Ammonium production in the presence of specific inhibitors of sulfate reduction and methanogenesis was investigated in six marine sediments which differed in bulk properties and organic matter input. In all cases, little effect of the inhibitors on ammonium production was observed, although sulfate reduction was suppressed by molybdate. This gives evidence that the processes of fermentation and...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 1896
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja02091a005