Enzymatic synthesis of l-ascorbyl linoleate in organic media

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• 作者：QingXun Song ; Ying Zhao ; WeiQin Xu ; WenYu Zhou and DongZhi Wei
• 关键词：l ; Ascorbyl linoleate ; Immobilized lipase ; Organic solvents ; Enzymatic synthesis ; Transesterification
• 刊名：Bioprocess and Biosystems Engineering
• 出版年：2006
• 出版时间：March 2006
• 年：2006
• 卷：28
• 期：4
• 页码：211-215
• 全文大小：263 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Industrial Chemistry and Chemical Engineering
  Industrial and Production Engineering
  Waste Management and Waste Technology
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1615-7605

文摘

A novel l-ascorbyl fatty acid ester, l-ascorbyl linoleate was successfully prepared by enzymatic esterification and transesterification in a non-aqueous medium using immobilized lipase as biocatalyst. Changes in enzymatic activity and product yield were studied for the following variable: the nature of the fatty acid, the fatty acid concentration and water content. The yield of synthesis for the C18 unsaturated fatty acids were higher than for the C18 saturated fatty acid. Initial enzyme concentration does not affect the equilibrium of the reaction. And the product yield (33.5%) in the transesterification was higher than that of the esterification (21.8%) at a high-substrate concentration 0.3 M. The medium water content was found to have a distinct influence on the l-ascorbyl linoleate synthesis.