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
References in periodicals archive ?
Antioxidants offer protection to the cell membranes and prevent the oxidation process by neutralizing toxic oxygen molecules and free 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).
Vitamin C is usually found in high concentrations in semen, where it is known to protect the DNA of sperm cells from toxic oxygen radicals.
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.
Although plants depend on the sun's energy to fuel photosynthesis, too much light causes them to make toxic oxygen molecules.
SCSs function by catalytically inactivating toxic oxygen radicals and hydrogen peroxide, turning these chemicals into harmless oxygen and water.
According to the researchers, the toxic oxygen molecules released into the cell causes the increasing 'gloopiness'.
1993) suggested that the initial modifications of cellular metabolism and calcium homeostasis may activate major pathways leading to a loss of membrane integrity by a) membrane phospholipid degradation, b) production of amphipathic lipids, c) damage of the cytoskeleton, and d) generation of toxic oxygen species and free radicals.
Premature neonates have low levels of naturally occurring antioxidant enzymes such as superoxide dismutase, which converts toxic oxygen free-radicals to less toxic hydrogen peroxide and water.
But these cells are probably the last place an unfriendly invader wants to be--once attached to the cell, the parasites are usually doomed, as a macrophage respiratory burst generates toxic oxygen molecules to destroy the attacker.