Toxic oxygen

Toxic oxygen

Oxygen is required for life, as it is needed for energy production. When oxygen is used by the body, most of it is converted to water. However, a small fraction of the oxygen breathed is converted to toxic oxygen. The body uses several different processes for preventing and repairing toxic-oxygen damage. One of these processes involves vitamin E.
Mentioned in: Vitamin E Deficiency
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Antioxidants offer protection to the cell membranes and prevent the oxidation process by neutralizing toxic oxygen molecules and free radicals.
Comparative studies conducted with other naturally occurring antioxidants like vitamin-E, vitamin C, mannitol, glutathione, N-acetylcysteine and 2-lipoic acid show an equal or greater efficacy of melatonin in neutralizing highly toxic oxygen and nitrogen-reactants.
Technical limitations of anaerobic culture arise mostly due to toxic oxygen exposure making isolation of anaerobes from clinical specimen quite difficult.
They think that the antioxidant properties of uric acid in the blood prevent neuron death by suppressing the accumulation of toxic oxygen radicals.
Exact cause of polyneuropathy is not known but has been attributed to immune mediated capillary damage, toxic oxygen radicals, tumor necrosis factor, parasitic emboli obstructing the vasa nervorum, neurotoxin release, nutritional and metabolic disturbances (2).
High water temperatures can block photosynthetic reactions in the algal cells causing a build-up of toxic oxygen compounds, which threaten the coral and can result in a loss of the zooxanthellae.
Antioxidants such as GSH and melatonin function to protect cells from toxic oxygen products (ROS).
Then the MRSA strains were mixed with human neutrophils (white blood cells), the body's first line of defense against bacterial invasion, which kill bacteria by producing hydrogen peroxide and other toxic oxygen metabolites.
In tumors, T cells are inhibited by toxic oxygen metabolites (free radicals) that are normally produced by macrophages and neutrophils; histamine inhibits the production of those oxygen metabolites "and simply allows the IL-2 to work more effectively upon the T cells and natural killer cells."
Exposure to sub-optimal chilling temperatures may lead to an increased proliferation of toxic oxygen compounds present in chilling sensitive plants such as maize.
Although plants depend on the sun's energy to fuel photosynthesis, too much light causes them to make toxic oxygen molecules.
According to the researchers, the toxic oxygen molecules released into the cell causes the increasing 'gloopiness'.