Ultrasonic pretreatment for lipase-catalyed synthesis of phytosterol esters with different acyl donors

文献类型： 外文期刊

第一作者： Zheng, Ming-Ming

作者： Zheng, Ming-Ming;Wang, Lian;Huang, Feng-Hong;Dong, Ling;Guo, Ping-Mei;Deng, Qian-Chun;Li, Wen-Lin;Zheng, Chang

作者机构：

关键词： Esterification;Lipase-catalyzed;Phytosterol esters;Ultrasonic pretreatment

期刊名称：ULTRASONICS SONOCHEMISTRY （ 影响因子：7.491； 五年影响因子：7.537 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： This study is focused on the enzymatic esterification of phytosterols with different acyl donors to produce the corresponding phytosterol esters catalyzed by Canadia sp. 99-125 lipase under ultrasound irradiation. An ultrasonic frequency of 35 kHz, power of 200 W and time of 1 h was determined to guarantee satisfactory degree of esterification and lipase activity. The influence of temperature, substrates concentration and molar ratio was investigated subsequently. The optimum production was achieved in isooctane system at 60°C with phytosterol concentration of 150 μmol/mL and phytosterol to fatty acid molar ratio of 1:1.5, resulting in a phytosterol esters conversion of above 85.7% in short reaction time (8 h). Phytosterols esters could also be converted in high yields to the corresponding long-chain acyl esters via transesterification with triacylglycerols (above 90.3%) under ultrasound irradiation. In optimum conditions, the overall esterification reaction rate using the ultrasonic pretreatment process was above 2-fold than that of mechanical stirring process without damage the lipase activity.

分类号： O644.3

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