منابع مشابه
Stabilization of Free Radical Intermediates
Free radicals intermediates are formed on the surface of metal oxide semiconductors, namely Ti02 and Fe203, following the light-induced charge separation upon band-gap illu-mination. These radicals appear to adhere strongly to the ~.urfaces of the small colloidal particles (diameters between 5 and 20 nm) employed in this study. A second electron-transfer step yielding the observed end-products ...
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At low pressure, ethylene gas consists of single translating and rotating molecules and behaves as an ideal gas. With decrease of free volume by compression, various rotating supramolecular particles are formed, which require less space for the movement: molecular pairs, bimolecules and oligomolecules. The appearance of a new kind of particles is manifested as a phase transition of the second o...
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Salvia reuterana Bioss. is an aromatic perennial plant traditionally used for its anxiolytic and sedative properties. In the present study, various fractions and essential oil of S. reuterana aerial parts were investigated to find its free radical scavenging principles. Hydroalcoholic fraction with IC50 value of 112.6 ±3.2 μg ml-1 in DPPH assay demonstrated the highest free radical scavenging a...
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The study of toxicities which are caused by free radical inducing chemicals (e.g., carbon tetrachloride), helps to determine the mode of action of those important drugs which act by inhibiting free radicals. Evaluation of toxicities induced by carbon tetrachloride and phenobarbitone administration was carried out in seventy healthy male rabbits. Each animal received CCI4 0.25-0.5 mL/kg bod...
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The red-colored flavin anion radical of lactate oxidase was formed by photochemical reduction. The radical was found to be reoxidized readily by molecular oxygen, with a rate constant of 4 X lo5 M "I min" at pH 7.0, 25°C. On mixing the radical under anaerobic conditions with pyruvate, a change in spectrum typical of charge transfer interaction was found. The complex was composed of 1 eq of pyru...
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ژورنال
عنوان ژورنال: Nature
سال: 1958
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1821496a0