Results 321 to 330 of about 346,257 (357)
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Superoxide Dismutase in Epidermis (1)
The Journal of Dermatology, 1987AbstractSuperoxide dismutase (SOD), which catalytically scavenges superoxide anion (O–2), constitutes an essential defense against the toxicity of oxygen. We investigated the enzyme activity of pig skin epidermis. SOD activity was determined by monitoring the inhibitory effect of SOD on red formazan formation from neotetrazolium, which depends on (O–2)
Akira Ohkawara +3 more
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Bacterial Superoxide Dismutases
1988Superoxide dismutase (SOD) has played a major role in establishing the biological relevance of oxyradicals. To many oxyradical researchers, “superoxide dismutase” connotes a copper-zinc SOD (CuZnSOD), the first dismutase to be purified and the form of prime interest clinically. However, superoxide dismutases containing manganese or iron as cofactor are
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Superoxide dismutase mimetic properties exhibited by vacancy engineered ceria nanoparticles.
Chemical Communications, 2007In this report ceria nanoparticles are shown to act as catalysts that mimic superoxide dismutase (SOD) with the catalytic rate constant exceeding that determined for the enzyme SOD.
Cassandra Korsvik +3 more
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Reversal of the superoxide dismutase reaction
Biochemical and Biophysical Research Communications, 1973Abstract The superoxide dismutase from bovine erythrocytes has been shown to catalyze the reduction of oxygen by H2O2. This reversal of the spontaneous disproportionation of superoxide radicals was made feasible through the use of tetranitromethane as an effective scavenger for the superoxide radicals.
Irwin Fridovich, Ellen K. Hodgson
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Extension of life-span with superoxide dismutase/catalase mimetics.
Science, 2000We tested the theory that reactive oxygen species cause aging. We augmented the natural antioxidant systems of Caenorhabditis elegans with small synthetic superoxide dismutase/catalase mimetics. Treatment of wild-type worms increased their mean life-span
S. Melov +9 more
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Mimics of Superoxide Dismutase
2019Chemists have attempted to mimic such enzymes as P450s, catalases, hemoglobin, photosynthetic reaction centers, and superoxide dismutases to name a few. An ideal mimic would catalyze the same reaction as the parent enzyme with specificity and efficiency matching that of the native enzyme. Several criteria determine which synthetic compounds will be the
Fridovich Irwin, M. Faulkner Kevin
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Superoxide dismutases in chronic gastritis
APMIS, 2016Human gastric diseases have shown significant changes in the activity and expression of superoxide dismutase (SOD) isoforms. The aim of this study was to detect Mn‐SOD activity and expression in the tissue of gastric mucosa, primarily in chronic gastritis (immunohistochemical Helicobacter pylori‐negative gastritis, without other pathohistological ...
Dražen Švagelj +5 more
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An Expanded Function for Superoxide Dismutase
Free Radical Research Communications, 1991alpha-Hydroxyalkylperoxyl radicals were generated from the primary and secondary alcohols methanol, ethanol and 2-propanol in N2O/O2-saturated aqueous solutions by pulse radiolysis. These radicals reduced a ferric iron porphyrin complex, tetrakis-(4-N-methylpyridyl)porphine, with diffusion-controlled rate constants. The extreme sensitivity of the shift
Gidon Czapski, Wolf Bors, Manfred Saran
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Bovine superoxide dismutase: A radioimmunoassay
Archives of Biochemistry and Biophysics, 1978Abstract Rabbit antibodies to bovine superoxide dismutase have been produced and used to develop a double-antibody solid phase radioimmunoassay for the enzyme. The assay is sensitive and highly specific for the bovine enzyme, showing no cross-reactivity with the murine or human superoxide dismutases.
Alec H. Sehon +3 more
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Superoxide Dismutases in Photosynthetic Organisms
1976Although molecular oxygen is an effective electron acceptor, for most organisms oxygen is harmful unless they have a protective mechanism against oxygen toxicity. This is especially the case when the organisms are irradiated “by visible light at high intensity mainly due to photodynamic action of endogeneous pigments.
Sumio Kanematsu +3 more
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