食品科学

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几种醇对Lipozyme RM IM催化卵磷脂乙醇解的影响及其工艺条件优化

马娇娜,杨国龙*,陈素琴,毕艳兰,刘 伟   

  1. 河南工业大学粮油食品学院,河南 郑州 450001
  • 出版日期:2014-11-25 发布日期:2014-12-09
  • 基金资助:

    河南省高等学校青年骨干教师资助计划项目(2011GGJS-079);河南工业大学研究生教育创新计划项目(2012YJCX10)

Effect of Other Alcohols on Lipozyme RM IM-Catalyzed Ethanolysis of Phosphatidylcholine and Optimization of the Ethanolysis Process

MA Jiao-na, YANG Guo-long*, CHEN Su-qin, BI Yan-lan, LIU Wei   

  1. School of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
  • Online:2014-11-25 Published:2014-12-09

摘要:

研究脂肪酶Lipozyme RM IM催化大豆卵磷脂(phosphatidylcholine,PC)乙醇解反应制备溶血卵磷脂(lysophosphatidylcholine,LPC)过程中其他几种醇对PC乙醇解的影响,并对乙醇解条件进行了优化。发现正丁醇对PC乙醇解无明显影响,叔丁醇对PC乙醇解有一定的抑制作用,1,2-丙二醇和丙三醇呈现较好的促进作用。最后选用丙三醇作为乙醇解的促进剂,通过响应面分析法确定了无溶剂体系中Lipozyme RM IM催化PC醇解的最佳工艺条件为加酶量15%(以PC质量计,m/m)、反应温度28 ℃、加水量8%(水/乙醇溶液,V/V)、丙三醇10% (丙三醇/乙醇溶液,V/V)、底物质量浓度1.49 g/mL(PC/乙醇溶液,m/V)、反应时间11 h,此条件下 LPC转化率高达98.2%。实验证明,丙三醇对无溶剂体系中Lipozyme RM IM催化条件下的PC乙醇解反应有很好的促进作用。

关键词: 卵磷脂, Lipozyme RM IM, 乙醇解, 溶血卵磷脂

Abstract:

The effects of other alcohols on the Lipozyme RM IM-catalyzed ethanolysis of soy phosphatidylcholine (PC)
for the preparation of lysophosphatidylcholine (LPC) were studied and the ethanolysis conditions were optimized. The
results showed that n-butanol had no significant synergistic or inhibitory effect on the ethanolysis of PC, while tert-butanol
displayed an inhibitory effect, and 1,2-propylene glycol and glycerol exhibited a significant synergistic effect. Glycerol
was chosen as the synergistic agent for PC ethanolysis. The optimal conditions for the ethanolysis catalyzed by Lipozyme
RM IM in solvent-free system were obtained by response surface methodology as follows: lipase dosage, 15% (based on
the mass of PC); temperature, 28 ℃; ratio of water to ethanol solution, 8% (V/V); ratio of glycerol to ethanol solution, 10%
(V/V); substrate concentration, 1.49 g/mL (PC/ethanol solution ratio, m/V), and reaction time, 11 h. Under these conditions,
the conversion rate of LPC was 98.2%. Glycerol exhibited a significant synergistic effect on the ethanolysis of PC.

Key words: phosphatidylcholine, Lipozyme RM IM, ethanolysis, lysophosphatidylcholine

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