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free radical |
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radical /rad·i·cal/ (rad´ĭ-k'l) 1. directed to the root or cause; designed to eliminate all possible extensions of a morbid process. 2. a group of atoms that enters and goes out of chemical combination without change. free radical a radical that carries an unpaired electron; such radicals are extremely reactive, with a very short half-life.
Free radical An unstable molecule that causes oxidative damage by stealing electrons from surrounding molecules, thereby disrupting activity in the body's cells. Mentioned in: Smoking free radical, a species with at least one unpaired electron. Oxygen is a stable diradical, but most other free radicals are unstable and react readily with other molecules. free radical, n a compound with an unpaired electron or proton. It is unstable and reacts readily with other molecules. radical 1. directed to the cause; going to the root or source of a morbid process. 2. a group of atoms that enters into and goes out of chemical combination without change and that forms one of the fundamental constituents of a molecule. free radical a radical, extremely reactive, and having a very short half-life (10−5 s or less in an aqueous solution), which carries an unpaired electron. free radical Physiology Any of a family of highly reactive molecules containing an unpaired electron in the outer orbital–eg, the excited variants of O2; FRs cause random damage to structural proteins, enzymes,
macromolecules, DNA, playing major roles in inflammation, hyperoxidation, post-ischemic tissue damage, infarction, possibly also CA and tissue damage in transplants. See Antioxidants, Free radical scavenger, Free radical theory Vox populi Freed
radical A paroled political polemicist. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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radiation therapy radiation therapy management radiation therapy technologist radiation toxicity radiation-induced cancer radiative radical Radical (chemistry) radical cystectomy radical dissection radical hysterectomy Radical inguinal orchiectomy radical lymphadenectomy radical mastectomy radical mastoidectomy |
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