Results 211 to 220 of about 376,943 (251)
Some of the next articles are maybe not open access.
Microbial Superoxide Dismutases
1989Publisher Summary The presence of oxygen in the environment presents both advantages and threat to all forms of life. The use of oxygen as a final electron acceptor provides more energy than that afforded by anaerobic fermentation. Oxygen is also useful in many biosynthetic reactions.
openaire +2 more sources
Effect of Aluminium on Superoxide Dismutase
Clinical Science, 19891. The effect of Al3+ on superoxide dismutase in vitro was studied, since in uraemia there is excessive superoxide production and frequently an elevated serum Al3+ level. Thus, the protective role of superoxide dismutase is particularly important. 2.
Geoffrey M. Berlyne +3 more
openaire +3 more sources
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
openaire +3 more sources
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
openaire +3 more sources
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
openaire +2 more sources
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
openaire +3 more sources
Superoxide, superoxide dismutase and ischemic injury.
Current opinion in investigational drugs (London, England : 2000), 2002Oxidative stress results from an oxidant/antioxidant imbalance: an excess of oxidants relative to the antioxidant capacity. Recent evidence strongly suggests that oxidant stress plays a major role in several aspects of ischemia and reperfusion. Immunohistochemical and biochemical evidence demonstrate the significant role of reactive oxygen species, in ...
Salvemini, Daniela, CUZZOCREA, Salvatore
openaire +2 more sources
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
openaire +3 more sources
RADIATION PROTECTION BY SUPEROXIDE DISMUTASE
Photochemistry and Photobiology, 1978Abstract— Protection of X‐irradiated mice by bovine superoxide dismutase is enhanced when the enzyme is given intravenously both before and after the exposure. With the combined treatment, the LD50(30) dose is increased from 734 ± 8 to 1144 ± 15rad for a dose reduction factor of 1.56 ± 0.04.
openaire +3 more sources
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
openaire +3 more sources