free radical


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  • noun

Synonyms for free radical

an atom or group of atoms with at least one unpaired electron

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References in periodicals archive ?
The reactive molecules, called free radicals, are created in the exhaust of burning fossil fuels and other materials, arising from cookstoves, car fumes, factories, wood fires and cigarettes.
Researchers at McGill University's findings have showed how free radicals promote longevity in an experimental model organism, the roundworm C.
The idea that free radicals, produced by our bodies are the culprit behind aging is not true.
The reason why most of us enjoy long, healthy lives is that the body has developed its own unique defence system for fighting the harmful free radicals that cause ageing and cancers.
Extra virgin olive oil, a potent free radical scavenger, and nonhydrogenated oils are "good" fats that promote health and beauty.
Antioxidants protect the cells by getting rid of free radical presences in the body and protecting the cells from further damage.
Countermeasures: Lifestyle factors such as a nutritious low-fat diet high in antioxidants, regular moderate exercise, at least seven hours of sleep a night, and avoidance of other factors associated with free radical formation can help prevent or slow cell damage associated with aging.
Now, the free radicals formed roam throughout the body looking for the needed electron, until they get it by oxidizing the nearest molecule, which--now having an unpaired electron--becomes a free radical itself, starting a chain reaction that involves more free radicals, more instability and more damage resulting in the disruption of the living cell.
Now researchers report in the August 2005 Journal of Clinical Investigation that even before the immune system cranks up, NADPH oxidases in pollen itself generate a type of free radical known as reactive oxygen species (ROS), which interfere with cell signaling pathways and cause the immune system to overreact.
Some of the most common sources of free radical stress in the body come from smoking, chronic stress, and obesity.
Free radical molecules can exist on their own, but they are sometimes found within the structure of certain enzymes or proteins, which have either attracted them or, in some cases, produced them themselves.
A free radical is an atom or molecule that has at least one unpaired electron, causing it to be very chemically reactive.
The detection of free-radical H*, the potentially most interesting free radical, or N* within the crystal structures was neither expected, nor identified in substitutional or interstitial sites.
Some of the chapters on specific disease processes are quite helpful in bringing the reader up-to-date on the evidence for free radical involvement in the disease process.
In this research study, the antioxidant, ascorbic acid, was given to mice in attempt to lower their free radical count.