Results 201 to 210 of about 7,641 (255)
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The oxidation of NADH by tetravalent vanadium
Archives of Biochemistry and Biophysics, 1987Vanadyl (V(IV)) salts autoxidize in neutral aqueous solution yielding O2- plus vanadate (V(V)) and these, in turn, cause the oxidation of NADH, by a free radical chain reaction. This oxidation of NADH was inhibited by superoxide dismutase, but not by a scavenger of HO..
S, Liochev, I, Fridovich
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Biocatalytic and biomimetic oxidations with vanadium
Journal of Inorganic Biochemistry, 2000Approaches to the rational design of vanadium-based semi-synthetic enzymes and biomimetic models as catalysts for enantioselective oxidations are reviewed. Incorporation of vanadate ion into the active site of phytase (E.C. 3.1.3.8), which in vivo mediates the hydrolysis of phosphate esters, afforded a semi-synthetic peroxidase.
F, van de Velde +2 more
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Role of Oxidation State of Vanadium in Vanadium Oxide-Hematite Nanoparticles
MRS Proceedings, 2013ABSTRACTSingle phase, a FeVO4 triclinic crystalline structure was successfully synthesized by annealing the mechanochemically milled xV2O5·(1-x)α-Fe2O3 composites (x = 0.5) at 550 °C for 1 h. X-ray powder diffraction (XRD) and Mössbauer spectroscopy were combined for a detailed study of the assisting role of the mechanochemical milling process ...
Monica Sorescu, Tianhong Xu, Collin Wade
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Applied Catalysis, 1991
Abstract The oxidative dehydrogenation of ethane has been investigated on a range of mixed Mo/V/Nb oxide catalysts. A maximum in activity was observed for Mo/V oxide catalysts at ca. 70% Mo. Addition of niobium oxide to this mixed oxide resulted in a more active and selective catalyst.
R. Burch*, R. Swarnakar
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Abstract The oxidative dehydrogenation of ethane has been investigated on a range of mixed Mo/V/Nb oxide catalysts. A maximum in activity was observed for Mo/V oxide catalysts at ca. 70% Mo. Addition of niobium oxide to this mixed oxide resulted in a more active and selective catalyst.
R. Burch*, R. Swarnakar
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Fluorination of Vanadium Oxides
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1991Abstract The reactions of ammonium hydrogen fluoride with oxides of vanadium in its three different oxidation states are discussed. With vanadium in its +5 and +4 states, the products are oxofluoro compounds while with +3 state, the product is a hexafluoro compound.
B. N. Wani, U. R. K. Rao
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Journal of Applied Physics, 1962
An investigation in the ternary system FeVO has been made of the chemical, crystallographic, and magnetic properties of the corundum FeVO3, and the spinels FeV2O4 and Fe2VO4· FeVO3 has been reported in the literature as Fe2+V4+O3 and antiferromagnetic at room temperature. However, the study reported in this paper shows that these results are incorrect.
A. Wold +3 more
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An investigation in the ternary system FeVO has been made of the chemical, crystallographic, and magnetic properties of the corundum FeVO3, and the spinels FeV2O4 and Fe2VO4· FeVO3 has been reported in the literature as Fe2+V4+O3 and antiferromagnetic at room temperature. However, the study reported in this paper shows that these results are incorrect.
A. Wold +3 more
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Nature, 1933
MECKE and Guillery1 identified only four band heads given in Kayser's “Handbuch der Spectro-scopie” (6, 786, 1912) as due to the oxide of vanadium and assigned them their vibration quantum numbers. These are the (1,0), (0,0), (0,1) and (0,2) band heads. Prof.
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MECKE and Guillery1 identified only four band heads given in Kayser's “Handbuch der Spectro-scopie” (6, 786, 1912) as due to the oxide of vanadium and assigned them their vibration quantum numbers. These are the (1,0), (0,0), (0,1) and (0,2) band heads. Prof.
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Kinetics of ethane oxidation on vanadium oxide
The Journal of Physical Chemistry, 1990The oxidation of ethane with molecular oxygen on a well-characterized V{sub 2}O{sub 5}/SiO{sub 2} catalyst produced ethylene and acetaldehyde as the only selective oxidation products. The effects of partial pressures of ethane, oxygen, and water were investigated at 841 K, and it was found that only water had a strong influence on the overall ...
S. Ted. Oyama +2 more
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Oxidation of Vanadium in the Liquid Oxide Region
Nature, 1966AT temperatures above the melting point of vanadium pentoxide (675° C), the rate of oxidation of vanadium is extremely rapid and the kinetics have been described1 in terms of the following equation where w is the weight of oxygen absorbed per square cm, t is the duration of ...
W. R. PRICE, J. STRINGER
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