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Synthesis and characterisation of vanadium(III) complexes of biphenylphenols
Vanadium(III) complexes biphenylphenols magnetic study
2010/10/19
The vanadium(III) complexes of composition [VCl3-n(OAr1,2)n.(THF)2] (OAr1 = 2-phenylphenoxo and OAr2 = 4-phenylphenoxo, THF = tetrahydrofuran; n = 1 /to 3) were prepared by in situ reaction of VCl3.(T...
Flow-Injection Determination of Vanadium in Seawater Samples with Acidic Potassium Permanganate Chemiluminescence
Vanadium Seawater Samples Acidic Potassium Permanganate Chemiluminescence
2010/9/17
Chemiluminescence from the vanadium and potassium permanganate reaction was studied under acidic conditions to develop a sensitive method for vanadium determination using the formaldehyde enhancement ...
Study of binary complexes of nickel(II), copper(II), and vanadium(V) with acetazolamide in aqueous medium by voltammetry
Acetazolamide Copper Nickel Vanadium Binary complexes Electronic Spectra Voltammetr
2010/4/8
The voltammetric behaviour of acetazolamide, the systemic carbonic anhydrase inhibitor, in the presence of some metal ions (Cu(II), Ni(II), and V(V)) were investigated using square-wave and cyclic vol...
ESTIMATION OF ELECTRON-IMPACT LINE WIDTHS FOR SINGLY-, DOUBLY- AND TRIPLY-CHARGED VANADIUM IONS
ELECTRON-IMPACT LINE DOUBLY- SINGLY- TRIPLY-CHARGED VANADIUM IONS
2009/3/26
In this paper we present the electron-impact widths for 28 transitions
of singly-, doubly-, and triply- ionized vanadium estimated by using the
modified semiempirical method. The electron-impact wid...
Determination of Trace Amounts of Vanadium by Kinetic-Catalytic Spectrophotometric Methods
kinetic-catalytic method SPADNS methylthymol blue vanadium
2007/12/19
摘要 Kinetic-catalytic spectrophotometric methods were proposed for the determination of trace amounts of vanadium element as vanadium(IV) and/or V(V) ions. The vanadium(IV) as VO2＋ ion and/or vanadium(...
Voltammetric and Spectroscopic Studies of Vanadium(V)-- Nicotinamide Interactions at Physiological pH
Vanadium complexes nicotinamide voltammetry spectroscopy
2010/4/19
The interaction of nicotinamide (NA) with NH4VO3 at the physiological pH (pH 7.4) was studied by voltammetry and UV-Vis spectroscopy. The reduction of V(V) ions complexed with NA in phosphate buffer (...
Antiferromagnetic Transition in Thermally Evaporated Manganese-Vanadium Alloys
Néel point magnetic moment spin fluctuation
2010/4/9
Antiferromagnetic transition in thermally evaporated Mn-V alloys has been studied using resistivity-temperature measurements from 300 to 1.4 K. Resistivity-temperature behaviour typical of bulk a -Mn ...
Authigenic Illite and Organic Matter: The Principal Hosts of Vanadium in the Mecca Quarry Shale at Velpen, Indiana
Black Shale Illite Mecca Quarry Organic Matter Vanadium
2011/12/6
Abstract: The Mecca Quarry Shale Member from Velpen, Indiana contains abundant vanadium which occurs in solid solution within illite-rich illite-smectite (I-S) having an average content of 1.65 wt. % ...
Separation of Molybdenum, Vanadium and Nickel by Liquid-Liquid Extraction
Separation Molybdenum Vanadium Nickel Liquid-Liquid Extraction
2010/6/30
Elements in the ash of asphaltites that is used in thermal central for power generation units are Mo, V, U, Ti and Ni. The main goal of this study was to separate molybdenum, vanadium and nickel from ...
Phosphovanadylite: A new vanadium phosphate mineral with a zeolite-type structure
Phosphovanadylite vanadium phosphate mineral zeolite-type structure
2012/4/1
Phosphovanadylite, whose simplified formula is (Ba,Ca,K,Na)x[(V,Al)4P2(O,OH)16]·12H2O, is a new vanadium phosphate zeolite mineral found in the Phosphoria Formation at Monsanto’s Enoch Valley Mine, So...
Cation ordering in lead-molybdenum-vanadium oxychlorides
Cation lead-molybdenum-vanadium oxychlorides
2012/4/9
The crystal chemistry and structure ofthe layered lead oxychloride parkinsonite, ideally Pb7Mo09C12, have been reevaluated in the light of TEM observations of natural and syn-thetic samples and the st...
The Composition and Origin of Vanadium-Rich Clay Minerals in Colorado Plateau Jurassic Sandstones
Chlorite Diagenegis Illite Microprobe Roseoelite Sandstone SEM Vanadium
2011/12/29
The composition and origin of vanadium-bearing clay minerals in the Jurassic (Morrison and Entrada Formations) sandstones of the Colorado Plateau are reassessed using microanalyses (microprobe and sca...
The Chemical Form of Vanadium (IV) in Kaolinite
Electron paramagnetic resonance Isomorphic substitution Kaolinite Vanadium
2011/12/30
A combined application of electron paramagnetic resonance (EPR) and Fourier-transform infrared (FTIR) spectroscopies with thermal methods was used to determine the chemical form of V(IV) in a Georgia ...
Vanadium Chlorite from a Sandstone-Hosted Vanadium-Uranium Deposit, Henry Basin, Utah
Chlorite Chlorite/smectite Corrensite Diagenesis Tosudite Uranium Vanadium X-ray powder diffraction
2012/1/12
An unusual vanadium chlorite precipitated during the formation of a vanadium-uranium ore deposit in the Henry Basin, southeastern Utah. The ore deposit formed by reduction and precipitation of U and V...
Vanadium-Titanium-Bearing Mixed-Layered Clay from Potash Sulphur Springs, Arkansas
Mixed-layer Titanium Vanadium
2012/2/10
A unique vanadium-titanium-bearing mixed-layered clay is currently being mined as an ore of vanadium at Potash Sulphur Springs, AR. The clay contains 80% expandable portion and has both a 14.22 and 18...