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Free radicals can oxidize LDL, and this is a key event in the formation of plaque in arteries, leading to heart disease and stroke. [23] These are examples of how the free-radical theory of aging has been used to neatly "explain" the origin of many chronic diseases. [24]
Free radical toxicity induced by xenobiotics and the subsequent detoxification by cellular enzymes (termination). Effects of ROS on cell metabolism are well documented in a variety of species. [ 20 ] These include not only roles in apoptosis (programmed cell death) but also positive effects such as the induction of host defence [ 37 ] [ 38 ...
Oxidative stress mechanisms in tissue injury. Free radical toxicity induced by xenobiotics and the subsequent detoxification by cellular enzymes (termination).. Oxidative stress reflects an imbalance between the systemic manifestation of reactive oxygen species and a biological system's ability to readily detoxify the reactive intermediates or to repair the resulting damage. [1]
Free radicals have an ominous name and a lot of people misunderstand them, their complex role in our bodies and how to manage them. Over the Counter: Connecting the dots on the role of free ...
Radical elimination can be viewed as the reverse of radical addition. In radical elimination, an unstable radical compound breaks down into a spin-paired molecule and a new radical compound. Shown below is an example of a radical elimination reaction, where a benzoyloxy radical breaks down into a phenyl radical and a carbon dioxide molecule. [7]
The relative importance of the antioxidant and pro-oxidant activities of antioxidant vitamins is an area of current research, but vitamin C, for example, appears to have a mostly antioxidant action in the body. [7] [9] However, less data is available for other dietary antioxidants, such as polyphenol antioxidants, [10] zinc, [11] and vitamin E ...
Pages in category "Free radicals" The following 82 pages are in this category, out of 82 total. This list may not reflect recent changes. ...
In alternative fashion, nitrite anions on sun-exposed skin may be photolyzed to free nitric oxide radicals by UVA in sunlight. [19] This mechanism may elicit significant changes to the systemic blood circulation in humans and be exploited for therapeutic purposes. [20] Nasal breathing also produces nitric oxide within the body. [21] [22] [23] [24]