منابع مشابه
Ascorbic Acid Dehydroascorbic Acid C6 Dicarboxylic Acid
Dehydroascorbic acid is shown to be converted to 2-(threo-l,2,3-trihydroxypropyl)tartronic acid in aqueous alkaline solutions. The structure of the acid was determined by mass spectrometry of its acyclic Me3Si derivative. Mass spectrometric and chromatographic data are compared with those of related compounds. The acid is formed by a benzilic acid rearrangement of the intermediate 2,3-hexodiulo...
متن کاملBiosynthesis of Ascorbic Acid
hypophosphite for the conversion of D-glucuronolactone into L-ascorbic acid. 9. The presence of borate or Antabuse, each at mm-concentration, inhibits the conversion of Dglucuronolactone into L-ascorbic acid to about 50 %. 10. The optimum conditions for the action of the enzyme system have been studied. 11. The biosynthesized ascorbic acid has been identified by paper chromatography and by a bi...
متن کاملascorbic acid treatment
The mechanisms regulating the secretion of proteoglycans and collagens in chondrocytes, in particular those operating at the level of the rough endoplasmic reticulum (RER), are largely unknown. To examine these mechanisms, I studied the effects of acute ascorbate treatment on the secretion of two collagen types (types II and IX) and two proteoglycan types (PG-H and PG-Lb, the major keratan sulp...
متن کاملL-Ascorbic Acid Peroxidase
Euglena gracilis was found to contain a peroxidase that specifically requires L-ascorbic acid as the natural electron donor in the cytosol. The presence of an oxidation-reduction system metabolizing L-ascorbic acid was demonstrated in Euglena cells. Oxidation of L-ascorbic acid by the peroxidase, and the absence of ascorbic acid oxidase activity, suggests that the system functions to remove H20...
متن کاملAscorbic Acid and Cozymase
Virtanen, A. I. & Hietala, P. K. (1955b). Acta chem. scand. 9, 549. Virtanen, A. I. & Kari, S. (1954). Acta chem. 8cand. 8, 1290. Virtanen, A. I. & Kari, S. (1955). Acta chem. 8cand. 9, 170. Virtanen, A. I. & Linko, P. (1955). Acta cUem. 8cand. 9, 551. Virtanen, A. I., Uksila, E. & Matikkala, E. J. (1954). Acta chem. 8cand. 8, 1091. Vogel, H. J. (1953). Proc. nat. Acad. Sci., Wa8h., 39, 578. Vo...
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ژورنال
عنوان ژورنال: Reactions Weekly
سال: 2021
ISSN: ['1179-2051', '0114-9954']
DOI: https://doi.org/10.1007/s40278-021-05542-6