On isomerization of retinal portion in rhodopsin;
紫红质色基-视黄醛骨架异构化机理探讨
The proton transfers among Asp85, Asp212, water and retinal were analyzed through the change of separation distance.
用CHARMM程序以细菌紫红质1R84晶体为模型,模拟了在等温定容条件下细菌紫红质在1ps过程中的变化,分析了与质子传递相关的ASP85,ASP212和水分子与视黄醛间氢键的结构变化情况。
A series of structural changes triggered when absorption of light energy caused isomerization of bacteriorhodopsin s bound retinal,and protons were transported from the inside of the cell to the out side medium and thereby converted light energy into chemical energy which enables the halobacterium to survive.
细菌视紫红质(Bacteriorhodopsin,或bR)是盐生嗜盐菌(Halobacterium salinarium)等细菌的跨膜蛋白质,其色基视黄醛的光致异构化作用触发细菌视紫红质的一系列结构变化,把质子从细胞质泵到细胞外空间。
The contents of carotenoids and retinol in milk were investigated by HPLC from 3th month to 10th month.
用高效液相色谱法对不同季节牛奶中的类胡萝卜素、视黄醇含量变化进行了研究,结果表明:牛奶中类胡萝卜素含量呈季节性变化,八、九月份含量较高,约为17。
The stability of all-trans retinol (vitamin A alcohol) was studied in O/W, W/O.
我们使用了典型的不稳定型药剂视黄醇(维生素A),考察了O／W/O型乳液中药剂稳定性的效果。
The retinene is prepared by selective oxidation form vitamin-A that is obtained by phase transfer catalyst hydrolysis of vitamin-A acetate.
以饲料级维生素 A 醋酸酯为原料,通过提纯、相转移催化水解和选择性氧化得到视黄醛;对苯二胺与对苯二甲酰氯反应,合成了端基为伯胺基团的聚酰胺,当反应起始温度为-10℃,单体对苯二胺与对苯二甲酰氯的投料比为1。