Enzymatic esterification of glycerol III. Lipase‐catalyzed synthesis of regioisomerically pure 1,3‐sn‐diacylglycerols and 1 (3)‐rac‐monoacylglycerols derived from unsaturated fatty acids
摘要:
摘要 利用具有高区域选择性和广泛底物耐受性的脂肪酶作为催化剂,在不可逆酰基转移条件下对甘油进行高效酯化。油酸、亚油酸、芥酸、蓖麻酸、羟基硬脂酸和科里奥利酸等多种不饱和脂肪酸以乙烯基酯的形式被用于此目的。在对生物催化剂的区域选择性(RE)和底物耐受性进行系统筛选的基础上,选择了合适的生物催化剂。实验发现,这些生物催化剂在特异性、选择性和非特异性方面存在明显差异,并以 RE 数值表示。在这些实验的基础上,以制备规模(150 毫摩尔)合成了多种分子,产率高(约 85%),区域异构纯度高(95% RE)。
Described herein are nanoparticles that are coated with a bilayer of molecules formed from surface binding molecules and amphiphatic molecules. The bilayer coating self assembles on the nanoparticles from readily available materials/molecules. The modular design of the bilayer coated nanoparticles provides a means for readily and efficiently optimizing the properties of the bilayer coated nanoparticle compositions. Also described herein are uses of such nanoparticles in medicine, laboratory techniques, industrial and commerical applications.
Reduced-calorie fats containing behenic acid and process for preparing same
申请人:Council of Scientific & Industrial Research,
公开号:US20040043125A1
公开(公告)日:2004-03-04
The invention relates to a reduced calorie fat and a process for the preparation of a reduced calorie fat, which includes esterification of edible oils with a source of behenic acid in the presence of a catalyst at a temperature in the range of about 25° C. to 150° C. for at least about 0.5 hours, and then recovering and purifying the reduced calorie fat using conventional methods.