0 a molecule that has an extra electron and therefore reacts very easily with other molecules -- 自由基，游离基
Free radicals have been implicated in cancer and many other serious diseases. 游离基是罹患癌症和许多其他严重疾病的潜在原因之一。
A free radical is a molecule with an unpaired electron.
Indirect evidence of increased free radical activity (oxidative stress) may be obtained by measurement of antioxidant concentrations in all tissue and body fluids.
And finally a reperfusion injury characterized by free radical formation and oxidative stress.
Thus, desiccation sensitivity may result from an inadequate provision of free radical scavenging mechanisms.
When a free radical reacts with a non-radical molecule a new radical is created, and consequently chain reactions are often initiated.
Free radical scavengers ameliorate the 2-cell block in mouse embryo culture.
The presence of the free radical scavenging enzymes in parasitic organisms has been linked with immunomodulation.
They are known free radical scavengers and metal chelators.
