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Ascorbic acid is easily oxidized and so is used as a reductant in photographic developer solutions (among others) and as a preservative. [citation needed] In fluorescence microscopy and related fluorescence-based techniques, ascorbic acid can be used as an antioxidant to increase fluorescent signal and chemically retard dye photobleaching. [29]
Dehydroascorbic acid (DHA) is an oxidized form of ascorbic acid (vitamin C). It is actively imported into the endoplasmic reticulum of cells via glucose transporters. [ 1 ] It is trapped therein by reduction back to ascorbic acid by glutathione and other thiols . [ 2 ]
The name "vitamin C" always refers to the l-enantiomer of ascorbic acid and its oxidized form, dehydroascorbate (DHA). Therefore, unless written otherwise, "ascorbate" and "ascorbic acid" refer in the nutritional literature to l-ascorbate and l-ascorbic acid respectively. Ascorbic acid is a weak sugar acid structurally related to glucose.
Ascorbic acid or vitamin C, an oxidation-reduction catalyst found in both animals and plants, [71] can reduce, and thereby neutralize, reactive oxygen species such as hydrogen peroxide. [ 71 ] [ 72 ] In addition to its direct antioxidant effects, ascorbic acid is also a substrate for the redox enzyme ascorbate peroxidase , a function that is ...
“The compounds responsible for making acidic foods acidic, such as ascorbic acid or citric acid, are very good at speeding up this reaction and binding to iron oxide, dissolving it away from the ...
[1] [2] If vitamin C, which is a good reducing agent, is present, the blue dye, which turns pink in acid conditions, is reduced to a colorless compound by ascorbic acid. This reaction is a redox reaction: vitamin C (ascorbic acid) is oxidized to dehydroascorbic acid, and DCPIP is reduced to the colorless compound DCPIPH 2
“[This serum] combines 15% L-ascorbic acid, vitamin E, and ferulic acid to protect against free radicals, reduce oxidative damage by up to 41%, and improve fine lines, firmness, and skin tone ...
Hydroxylation of a hydrocarbon is an oxidation, thus a step in degradation. ... They consume oxygen (the oxidant) and ascorbic acid (vitamin C, the reductant).
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