Formation of guanosine adducts from l-ascorbic acid under oxidative conditions
摘要:
L-Ascorbic acid (AA) was incubated with guanosine under physiological conditions and the reaction was monitored by HPLC-DAD. Four reaction products were isolated and identified as two pairs of diastereomers of N-2-(1-Carboxyethyl)-guanosine and N-2-(1-Carboxy-3-hydroxypropyl)-guanosine respectively. They were formed from AA in the presence of oxygen as well as from its degradation products L-dehydroascorbic acid and L-xylosone. (C) 1997 Elsevier Science Ltd.
[EN] METHODS OF PROTECTION FROM OXIDATIVE STRESS<br/>[FR] PROCEDES DE PROTECTION CONTRE LE STRESS OXYDATIF
申请人:UNIV BOSTON
公开号:WO2006107949A2
公开(公告)日:2006-10-12
[EN] Alterations in the structure of telomeres lead to modulation in the redox state of the cell. Substances which mimic destabilized telomeres, such as t-oligos, have a protective effect on future exposure of a cell to oxidative stress. [FR] Selon cette invention, des modifications de la structure de télomères entraînent la modulation de l'état redox de la cellule. Des substances qui imitent des télomères déstabilisés, telles que des t-oligos, ont un effet protecteur sur une cellule exposée par la suite à un stress oxydatif.
[EN] SWEET TASTE ENHANCER<br/>[FR] EXHAUSTEUR DE GOÛT SUCRÉ
申请人:FRITO LAY TRADING CO GMBH
公开号:WO2013121264A1
公开(公告)日:2013-08-22
This disclosure provides a sweetness-enhancing component consisting essentially of 5-acetoxyrfiethyl-2-furaldehyde, which can be used to enhance sweetness of reduced calorie products comprising a nutritive sweetener.
Formation of guanosine adducts from l-ascorbic acid under oxidative conditions
L-Ascorbic acid (AA) was incubated with guanosine under physiological conditions and the reaction was monitored by HPLC-DAD. Four reaction products were isolated and identified as two pairs of diastereomers of N-2-(1-Carboxyethyl)-guanosine and N-2-(1-Carboxy-3-hydroxypropyl)-guanosine respectively. They were formed from AA in the presence of oxygen as well as from its degradation products L-dehydroascorbic acid and L-xylosone. (C) 1997 Elsevier Science Ltd.