Phytosterol and phytostanol have been converted to the corresponding fatty acid esters via lipase - catalysed esterification with fatty acid or transesterification with mythyl esters of fatty acid or triacylglycerols 摘要植物甾醇和植物甾烷醇在脂肪酶催化作用下同脂肪酸酯化或同脂肪酸甲酯或三酰甘油酯交换可形成植物甾醇酯和植物甾烷醇酯。
This paper firstly synthesized the maltose fatty acid ester by agent - in - water method . the influences of reaction time , temperature , proportion of reactant ect . on synthesis have been observed 摘要本实验首次以麦芽糖浆为原料微乳化法合成麦芽糖酯，以酯得率为考察目标，主要探讨了反应过程中时间、温度、反应物配比等因素的影响，并对产品的理化性质作初步分析。
The result indicated the stearic acid , sucrose fatty acid ester and white beeswax can markedly improved the moisture barrier properties , and the stearic acid , sucrose fatty acid ester had a little effects on the mechanical properties of the films 实验表明，加入硬脂酸、蔗糖脂肪酸脂及蜂蜡使膜的阻水性有了较大的提高，添加硬脂酸、蔗糖脂肪酸脂对膜的机械性能影响不大。
In this paper , a new class of concrete high performance water reducer ( hpwr ) was designed from chemical classification of high performance wra , working principle and unit structure model of poly - carboxylate series wra . the comb - like copolymer structure of hpwr was " carboxylic group - ether link - ester link " . the synthetic chemical materials was polyethylene glycil , acrylic acid and methyl - metacrylic acid ester 本文从高性能减水剂的化学结构、作用机理以及聚羧酸类减水剂的单元结构模型出发，设计出国内所没有的一类新型高性能减水剂? ? “羧酸?醚键?酯键”为单元结构模型的梳型分子结构的减水剂共聚物，并确定了以聚乙二醇( peg )系列、丙烯酸( aa ) 、甲基丙烯酸甲酯( mma )为合成该类减水剂的主要化学原料。
