期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：1989
卷号：35
期号：1
页码：61-70
DOI：10.3177/jnsv.35.61
出版社：Center for Academic Publications Japan
摘要：The formation of L-ascorbic acid (AsA) was observed when dehydro-L-ascorbic acid (DHA) was dissolved in neutral buffer solutions under N2 bubbling at room temperature. The reduction of DHA was done with the lactonized compound of 2, 3-diketo-L-gulonic acid (DKG), that is, the 3, 4-endiol form of 2, 3-diketo-gulono-b-lactone (3, 4-End DKGL). 3, 4-End DKGL was formed from DHA or DKG (yield about 10%) under N2 bubbling in neutral buffer solution (pH 7.2). This material was not stable in neutral or alkaline solutions. 3, 4-End DKGL suppressed more strongly the linoleic acid (LA) peroxidation in the medium containing 20% EtOH and 10mM LA than did AsA. This may suggest the possibility that 3, 4-End DKGL reproduces AsA from DHA in physiological status.
关键词：dehydro-L-ascorbic acid;2, 3-diketo-L-gulonic acid;3, 4-en-diol form of 2, 3-diketo-gulono-δ-lactone;reduction of DHA;isomeri-zation of oxidized AsA;suppression of linoleic acid peroxidation
