Results 311 to 320 of about 145,800 (349)
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Cancer chemopreventive oltipraz generates superoxide anion radical
Archives of Biochemistry and Biophysics, 2005The cancer chemopreventive actions of oltipraz, a member of a class of 1,2-dithiolethiones, have been primarily associated with the induction of phase 2 enzymes mediated by a 41bp enhancer element known as the anti-oxidant response element in the promoter regions of many phase 2 genes. It has been suggested that oxygen radical formation by oltipraz may
Murugesan, Velayutham +3 more
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Superoxide dismutase assay using alkaline dimethylsulfoxide as superoxide anion-generating system
Analytical Biochemistry, 1983Alkaline dimethylsulfoxide as a superoxide anion-generating system in association with cytochrome c as a superoxide anion-indicating scavenger has been used to develop a new assay for superoxide dismutase. The assay is sensitive (one unit of enzymatic activity is provided by 110 ng of purified copper-containing superoxide dismutase) and highly specific.
K, Hyland +3 more
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Superoxide anion scavenging effect and superoxide dismutase activity ofGinkgo biloba extract
Experientia, 1989Ginkgo biloba extract is known to be efficient in diseases associated with free radical generation. The purpose of this work was to study, under in vitro conditions, the action of Ginkgo biloba extract (Gbe) against superoxide anion (O2-.), which is directly or indirectly implicated in cell damage. Gbe appears to have both an O2-. scavenging effect and
J, Pincemail +6 more
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Analysis of Superoxide Anion Production in Tissue
2005Endothelial production of oxygen free radicals, especially superoxide anion (O(2)-), is an important mechanism of vascular dysfunction in hypertension. Overproduction of oxygen free radicals, mainly O(2)- occurs in human hypertension and in a wide variety of animal models.
ZANETTI, MICHELA +4 more
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Reaction of polyacrylonitrile with superoxide anion
Polymer Degradation and Stability, 1992The reaction of polyacrylonitrile with superoxide anion (O•2), generated from KO2 and by electrochemical reduction of O2, was carried out in dimethyl formamide solution at 40°C under nitrogen. A rapid decrease in the molecular weight of the polymer with scarcely any loss of the yield of recovered polymer was observed.
Arata Kumakura +3 more
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Heterogeneous catalysis of superoxide anion dismutation
International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1987Abstract The dismutation of the superoxide anion studied by pulse radiolysis has been found to be catalysed by platinum microaggregates either in subcolloidal solutions or supported on colloidal TiO2 particles. The decay of O-2 obeys first order kinetics with respect to both O-2 and Pt particles, protons at the metal surface being responsible for the
J. Belloni, A. Lecheheb
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Superoxide anions stimulate hepatocyte growth
1984Superoxide anions generated by contact with tumor promoters stimulate hepatocyte ...
ARMATO, Ubaldo, F. ROMANO, P. G. ANDREIS
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Pseudo-halide anion engineering for α-FAPbI3 perovskite solar cells
Nature, 2021Jaeki Jeong, Jongdeuk Seo, Haizhou Lu
exaly