superoxide


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Related to superoxide: hydroxyl radical, superoxide dismutase

superoxide

(ˌsuːpərˈɒksaɪd)
n
(Chemistry) any of certain metal oxides that contain the O2 ion: potassium superoxide, KO2.

su•per•ox•ide

(ˌsu pərˈɒk saɪd, -sɪd)

n.
a compound containing the univalent ion O2.
[1840–50]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.superoxide - a metallic oxide containing the univalent anion O2-
oxide - any compound of oxygen with another element or a radical
2.superoxide - the univalent anion O2-; "much of the O2 supporting cellular respiration is reduced to the superoxide anion O2-"
anion - a negatively charged ion
References in periodicals archive ?
When a bacteria absorbs this superoxide, the internal chemistry is thrown off-balance.
Objective: To study alterations in superoxide dismutase at molecular level in spirometry-proven bronchial asthma.
In addition, direct ROS scavenging of hydrogen peroxide or superoxide generated were measured using Amplex Red and methyl cypridina luciferin analog (MCLA).
Enas Nashef, Associate Professor of Chemical and Environmental Engineering, leverages a type of free radical known as superoxide ion, to destroy toxic chlorinated hydrocarbon compounds present in wastewater in the same way that free radicals in our body damage cells; by stealing electrons from molecules wherever they can.
3-5) On the other hand, different data reported in the literature show a variation for the activities of antioxidant enzymes in BD: erythrocyte superoxide dismutase (SOD) activity was found to be increased, (4,6,7) unchanged, (8) and decreased, (5,9) glutathione reductase activity was found to be increased, (7) catalase, glutathione reductase and glutathione peroxidase (GPx) activities were found to be decreased, (5-9) and ultimately, erythrocyte catalase activity was found to be unchanged (4) in BD patients.
Extracellular superoxide dismutase (EC-SOD, SOD3) [1, 2], similar to cytosolic CuZn-SOD (SOD1) [3] and mitochondrial MnSOD (SOD2) [4, 5], catalyzes the dismutation of superoxide anion ([O.
The antioxidant activities of the derivatives were measured using different methods in this study, including reducing power capacity, metal chelating activity, superoxide anion radicals scavenging activity, H2O2 scavenging activity and hydroxyl radical scavenging.
A mitochondrial manganese superoxide dismutase (mtMnSOD) gene was cloned from the hepatopancreas of Macrobrachium nipponense using the rapid amplification of cDNA ends (RACE) method.
The proposed mechanism for the cytotoxic effect of ascorbate begins with the donation of an electron from ascorbate to molecular oxygen creating a superoxide radical anion, followed by conversion to hydrogen peroxide by several mechanisms.
For this purpose antioxidative activity of cells and different cellular fractions of Lactobacillus delbrueckii (ATCC7830) was evaluated by scavenging capacity of superoxide anion free radicals (SAFR)reducing power and total antioxidant capacity assay.
Peroxynitrite is created by a process called NOS-uncoupling, where rather than nitric oxide being produced by the NOS (nitric oxide synthase) enzyme, the superoxide free radical is produced, which then leads to peroxynitrite.
It undergoes dissociation to produce methemoglobin and superoxide anion: