Results 141 to 150 of about 135,046 (192)
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Annual Review of Biochemistry, 1984
Publisher Summary Nitrogen fixation ranks with photosynthesis as a process of fundamental importance to all life on earth. The biochemical process described by nitrogen fixation is the reduction of N2 to NH3, which can then be used for the synthesis of amino acids, nucleic acids, and other essential nitrogenous compounds.
V K, Shah +3 more
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Publisher Summary Nitrogen fixation ranks with photosynthesis as a process of fundamental importance to all life on earth. The biochemical process described by nitrogen fixation is the reduction of N2 to NH3, which can then be used for the synthesis of amino acids, nucleic acids, and other essential nitrogenous compounds.
V K, Shah +3 more
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Essays in Biochemistry, 1999
There are many molybdenum-containing enzymes distributed throughout the biosphere. The availability of molybdenum to biological systems is due to the high water solubility of oxidized forms of the metal. Molybdenum enzymes can be grouped on the basis of the structure of the metal centre.
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There are many molybdenum-containing enzymes distributed throughout the biosphere. The availability of molybdenum to biological systems is due to the high water solubility of oxidized forms of the metal. Molybdenum enzymes can be grouped on the basis of the structure of the metal centre.
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1980
Molybdenum (Mo) was first recognized as an element, distinct from graphite, in 1778 by SCHEELE (1778). Although Hjelm isolated the metal in impure form in 1782, it was not until 1893 that Moissan produced the metal in an essentially pure form (92 to 96% Mo) (WEAST 1967).
W M, Jarrell, A L, Page, A A, Elseewi
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Molybdenum (Mo) was first recognized as an element, distinct from graphite, in 1778 by SCHEELE (1778). Although Hjelm isolated the metal in impure form in 1782, it was not until 1893 that Moissan produced the metal in an essentially pure form (92 to 96% Mo) (WEAST 1967).
W M, Jarrell, A L, Page, A A, Elseewi
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Plasma molybdenum reflects dietary molybdenum intake
The Journal of Nutritional Biochemistry, 2004The relationship between plasma molybdenum (Mo) and dietary intake has not been investigated in humans. We developed an isotope dilution method to determine molybdenum in 0.5 mL blood plasma by ICP-MS and conducted a study to determine the effect of dietary intake on plasma molybdenum. Twelve young men consumed a very low Mo diet (22 microg/day) for 24
Judith R, Turnlund, William R, Keyes
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The Journal of Physical Chemistry A, 2012
The binuclear molybdenum carbonyls Mo(2)(CO)(n) (n = 11, 10, 9, 8) have been studied by density functional theory using the BP86 and MPW1PW91 functionals. The lowest energy Mo(2)(CO)(11) structure is a singly bridged singlet structure with a Mo-Mo single bond.
Yi, Zhao +4 more
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The binuclear molybdenum carbonyls Mo(2)(CO)(n) (n = 11, 10, 9, 8) have been studied by density functional theory using the BP86 and MPW1PW91 functionals. The lowest energy Mo(2)(CO)(11) structure is a singly bridged singlet structure with a Mo-Mo single bond.
Yi, Zhao +4 more
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Nature Chemistry, 2014
Anders Lennartson muses on molybdenum and its essential role in catalysing reactions from the bacterial to the industrial scale.
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Anders Lennartson muses on molybdenum and its essential role in catalysing reactions from the bacterial to the industrial scale.
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The determination of molybdenum in uranium and in molybdenum-uranium and molybdenum-niobium mixtures
The Analyst, 1958An improvement ia the spectrophotometric determi nation of molybdenum by means of its complex with toluene-3:4-dithiol is described. This consists in forming the complex in an aqueous-solvent medium in which it is soluble, and therefore avoids the necessity for solvent extraction. When applied by difference, either in the presence or absence of uranium,
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2012
The transition element molybdenum is of essential importance for (nearly) all biological systems. It needs to be complexed by a special cofactor in order to gain catalytic activity. With the exception of bacterial Mo-nitrogenase, where Mo is a constituent of the FeMo-cofactor, Mo is bound to a pterin, thus forming the molybdenum cofactor Moco, which in
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The transition element molybdenum is of essential importance for (nearly) all biological systems. It needs to be complexed by a special cofactor in order to gain catalytic activity. With the exception of bacterial Mo-nitrogenase, where Mo is a constituent of the FeMo-cofactor, Mo is bound to a pterin, thus forming the molybdenum cofactor Moco, which in
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Oxidation of molybdenum and molybdenum-tungsten alloys
Metal Science and Heat Treatment, 19761. We investigated the kinetics and mechanism of oxidation of low-alloy molybdenum and molybdenum-tungsten alloys in air at 400–1100°. 2. Alloying of molybdenum with tungsten increases its resistance to oxidation up to 600–700° at higher temperatures (800–1100°) the favorable effect of tungsten is suppressed by intensive evaporation of ...
A. A. Zaitsev +2 more
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Defect engineering in molybdenum-based electrode materials for energy storage
EScience, 2022Qinyou An, Fangyu Xiong, Zhu Shaohua
exaly