Structural Studies on Alkaline Earth Vanadate Glasses (Part 2)
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چکیده
منابع مشابه
Structural and dc electrical conductivity studies of SnO substituted lead vanadate glasses
Glasses of the system x (SnO) (50-x)PbO : 50V2O5 were prepared by melt quenching in the range x = 0 mole% to 15 mole%. Measurements are reported for dc electrical conductivity for the above compositions in the temperature range 300K-500K. The experimental results are analyzed with reference to various theoretical models proposed for dc electrical conduction in amorphous semiconductors. The anal...
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Lead aluminate melts were quenched rapidly with a roller quencher and bulk glasses were formed over a composition range from 72.5 to 80.0 mol% PbO. Pulsed neutron diffraction, Al MAS NMR and Raman spectroscopy were used to study the structure of a series of these glasses. The results show that in the glasses the aluminium is four coordinated by oxygen across the compositional range, with a bond...
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Orthovanadate was shown to be a potent competitive inhibitor (Ki less than 1 microM) of purified alkaline phosphatase from human liver, intestine of kidney. Inhibition was reversed and full enzymic activity restored in the presence of 1mM-adrenaline. Phosphate and vanadate competed for the same binding site on the enzyme.
متن کاملIsolation and Structural Characterization of Alkali and Alkaline Earth Metal Salts with Synthetic Non Cyclic Ionophores
In the present study, an investigation on the complex formation between mono- and divalent metal ions (Na+, K+, Li+ and Mg2+) in the form of salt with different podands using various solvents has been carried out. Isolated complexes were characterized by different spectroscopic techniques viz. IR, NMR and elemental analysis. On the basis of ...
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‘?Si NMR spectroscopy provides important contributions to the understanding of silicate glass structure. as the resonance frequency is sensitive to several aspects of the local chemical environment (including intertetrahedral bond angles. bond distances. and number of bridging oxygens per silicon atom). New data on a series of binary alkali and alkaline earth glasses are presented which highlig...
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ژورنال
عنوان ژورنال: Journal of the Ceramic Society of Japan
سال: 1994
ISSN: 0914-5400,1882-1022
DOI: 10.2109/jcersj.102.530