synthesis and properties of v3+ analogues of jarosite-group
... of the lower solubility of Tl2SO4, a solution containing 0.23 M Tl2SO4 was used, and Li2SO4 was added to give an overall sulfate concentration of 0.4 M SO4. The resulting precipitate, however, had an excessive Tl content, and X-ray powder-diffraction analysis indicated the presence of TlCl. Reducing ...
... of the lower solubility of Tl2SO4, a solution containing 0.23 M Tl2SO4 was used, and Li2SO4 was added to give an overall sulfate concentration of 0.4 M SO4. The resulting precipitate, however, had an excessive Tl content, and X-ray powder-diffraction analysis indicated the presence of TlCl. Reducing ...
Peroxidases and Catalases. Biochemistry, Biophysics, Biotechnology and Physiology Brochure
... and Catalases: Biochemistry, Biophysics, Biotechnology and Physiology provides a much–needed systematic, up–to–date treatment of peroxidases and catalases. From the structure and properties of the various superfamilies to current applications of peroxidases, the book consolidates vast amounts of inf ...
... and Catalases: Biochemistry, Biophysics, Biotechnology and Physiology provides a much–needed systematic, up–to–date treatment of peroxidases and catalases. From the structure and properties of the various superfamilies to current applications of peroxidases, the book consolidates vast amounts of inf ...
- Mendeley Data
... vanadium centers and (d) the high affinity of the metal toward oxygen [22-24]. Since epoxides are the key starting materials for a wide variety of products, the epoxidation of alkenes is considered to be one of the most widely studied reactions in organic chemistry. An area of strong research activi ...
... vanadium centers and (d) the high affinity of the metal toward oxygen [22-24]. Since epoxides are the key starting materials for a wide variety of products, the epoxidation of alkenes is considered to be one of the most widely studied reactions in organic chemistry. An area of strong research activi ...
Inhibition of Serine Amidohydrolases by Complexes of Vanadate
... that are believed to be structural analogs of the transition state of the normal acyl transfer reactions catalyzed by these enzymes (3–5). Phosphonylation of the -lactamase active site by 1 is much faster than spontaneous phosphonate hydrolysis and therefore the -lactamase active site must have si ...
... that are believed to be structural analogs of the transition state of the normal acyl transfer reactions catalyzed by these enzymes (3–5). Phosphonylation of the -lactamase active site by 1 is much faster than spontaneous phosphonate hydrolysis and therefore the -lactamase active site must have si ...
Two-Electron Reduction of a Vanadium(V) Nitride by CO to Release
... 150.6(1)°, on par with other isocyanate complexes.6 With 1-V(NCO) in hand, attention turned to probing the redox chemistry of the complex. When treated with 0.5% Na/Hg in the same manner as had been done for 1-Nb(NCO), 1-V(NCO) undergoes cyanate dissociation to give 1-V and sodium cyanate (Scheme 1B ...
... 150.6(1)°, on par with other isocyanate complexes.6 With 1-V(NCO) in hand, attention turned to probing the redox chemistry of the complex. When treated with 0.5% Na/Hg in the same manner as had been done for 1-Nb(NCO), 1-V(NCO) undergoes cyanate dissociation to give 1-V and sodium cyanate (Scheme 1B ...
Reaction of niobium with water
... Niobium does not react with air under normal conditions. The surface of niobium metal is protected by a thin oxide layer. Reaction of niobium with water Niobium does not react with water under normal conditions. The surface of niobium metal is protected by a thin oxide layer. Reaction of niobium wit ...
... Niobium does not react with air under normal conditions. The surface of niobium metal is protected by a thin oxide layer. Reaction of niobium with water Niobium does not react with water under normal conditions. The surface of niobium metal is protected by a thin oxide layer. Reaction of niobium wit ...
Part II - American Chemical Society
... (i.e. is diamagnetic). Account for these observations in terms of the bonding in the two molecules. d. The most stable allotrope of sulfur is the cyclic S8 molecule while S2 is a highly unstable gas. In contrast, O2 is the most stable allotrope of oxygen and O8 is unknown. Account for these differen ...
... (i.e. is diamagnetic). Account for these observations in terms of the bonding in the two molecules. d. The most stable allotrope of sulfur is the cyclic S8 molecule while S2 is a highly unstable gas. In contrast, O2 is the most stable allotrope of oxygen and O8 is unknown. Account for these differen ...
KUT 203/2 - Chemistry Practical III (Inorganic Chemistry)
... • Understand the correlation between the colors of transition metal or metal ion with its oxidation state i.e. VO2+ (yellow), VO2+ (blue) etc. • Determine the composition of a metal complex of which the metal exists in various oxidation states by using the titration technique. • Synthesize several c ...
... • Understand the correlation between the colors of transition metal or metal ion with its oxidation state i.e. VO2+ (yellow), VO2+ (blue) etc. • Determine the composition of a metal complex of which the metal exists in various oxidation states by using the titration technique. • Synthesize several c ...
Vanadium(V) complexes in enzyme systems: aqueous chemistry
... residues to the complexed water molecule (Fig. 3) suggest the presence of strong stabilizing hydrogen bond interactions. If Fig. 3 provides a reasonable representation of the binding of VL in the active site pocket of PTP1B then one of the methyl groups of the inhibitor is directed out of the active ...
... residues to the complexed water molecule (Fig. 3) suggest the presence of strong stabilizing hydrogen bond interactions. If Fig. 3 provides a reasonable representation of the binding of VL in the active site pocket of PTP1B then one of the methyl groups of the inhibitor is directed out of the active ...
A2 2, Analytical, Transition Metals, Electrochemistry and
... (iv) Complete the table below by naming the catalyst used for each industrial process. industrial process ...
... (iv) Complete the table below by naming the catalyst used for each industrial process. industrial process ...
Vanadium-Binding Proteins (Vanabins)
... common with the vertebrates. Moreover, their genome size is relatively small (~160 million bases) and they possess fundamentally all of basic developmental genes. They are, therefore, one of model organisms for genome sciences [cf. 5]. Many scientists have been interested in the reason why ascidians ...
... common with the vertebrates. Moreover, their genome size is relatively small (~160 million bases) and they possess fundamentally all of basic developmental genes. They are, therefore, one of model organisms for genome sciences [cf. 5]. Many scientists have been interested in the reason why ascidians ...
In situ Raman Spectroscopic Study of Supported Molten Salt
... role in a number of industrial processes, which due to the associated sulfur oxide emissions have significant environmental impact. Although the main source of SO2 emissions to the atmosphere is the coal-fired power generation, large amounts of SO2 are also emitted from sulfuric acid manufacturers a ...
... role in a number of industrial processes, which due to the associated sulfur oxide emissions have significant environmental impact. Although the main source of SO2 emissions to the atmosphere is the coal-fired power generation, large amounts of SO2 are also emitted from sulfuric acid manufacturers a ...
Arts and Sciences Program Chemistry Department Chemistry Placement Test
... A&S Chemistry Placement Test – Sample Test Choose one answer only ( A, B, C, D or E ) for each multiple choice question. Put all your answers on the Answer Sheet provided (Machine-readable). ...
... A&S Chemistry Placement Test – Sample Test Choose one answer only ( A, B, C, D or E ) for each multiple choice question. Put all your answers on the Answer Sheet provided (Machine-readable). ...
Vanadium
Vanadium is a chemical element with symbol V and atomic number 23. It is a hard, silvery grey, ductile and malleable transition metal. The element is found only in chemically combined form in nature, but once isolated artificially, the formation of an oxide layer stabilizes the free metal somewhat against further oxidation.Andrés Manuel del Río discovered compounds of vanadium in 1801 in Mexico by analyzing a new lead-bearing mineral he called ""brown lead,"" and presumed its qualities were due to the presence of a new element, which he named erythronium (Greek for ""red"") since, upon heating, most of its salts turned from their initial color to red. Four years later, however, he was (erroneously) convinced by other scientists that erythronium was identical to chromium. Chlorides of vanadium were generated in 1830 by Nils Gabriel Sefström who thereby proved that a new element was involved, which he named ""vanadium"" after the Scandinavian goddess of beauty and fertility, Vanadís (Freyja). Both names were attributed to the wide range of colors found in vanadium compounds. Del Rio's lead mineral was later renamed vanadinite for its vanadium content. In 1867 Henry Enfield Roscoe obtained the pure element.Vanadium occurs naturally in about 65 different minerals and in fossil fuel deposits. It is produced in China and Russia from steel smelter slag; other countries produce it either from the flue dust of heavy oil, or as a byproduct of uranium mining. It is mainly used to produce specialty steel alloys such as high-speed tool steels. The most important industrial vanadium compound, vanadium pentoxide, is used as a catalyst for the production of sulfuric acid.Large amounts of vanadium ions are found in a few organisms, possibly as a toxin. The oxide and some other salts of vanadium have moderate toxicity. Particularly in the ocean, vanadium is used by some life forms as an active center of enzymes, such as the vanadium bromoperoxidase of some ocean algae. Vanadium is probably a micronutrient in mammals, including humans, but its precise role in this regard is unknown.