食品科学

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超声波场中酶法合成L-抗坏血酸豆蔻酸酯及其抗氧化性

罗慧文,李 卓*   

  1. 暨南大学食品科学与工程系,广东 广州 510632
  • 出版日期:2014-05-25 发布日期:2014-05-29
  • 通讯作者: 李 卓

Synthesis and Antioxidant Activity of Lipase-Catalyzed L-Ascorbyl Myristate in Ultrasonic Field

LUO Hui-wen, LI Zhuo*   

  1. Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China
  • Online:2014-05-25 Published:2014-05-29
  • Contact: LI Zhuo

摘要:

以固定化脂肪酶(Novozym®435)为催化剂,在超声波场中合成L-抗坏血酸豆蔻酸酯,分别测定L-抗坏血酸豆蔻酸酯的清除羟自由基、DPPH自由基能力和还原力。结果表明:超声波可以显著加速底物在叔丁醇中的溶解,并使反应时间由48 h缩短到4 h,产率达77.58%,纯化后产物纯度为98.1%,固定化脂肪酶可重复利用4 次。L-抗坏血酸豆蔻酸酯具有很强的抗氧化性能,在等质量浓度条件下与L-抗坏血酸棕榈酸酯相当,优于特丁基对苯二酚,同时添加入油脂时其抗氧化能力也较优。

关键词: 超声波, 脂肪酶催化合成, L-抗坏血酸豆蔻酸酯, 抗氧化性

Abstract:

The synthesis catalyzed by immobilized lipase (Novozym®435) of L-ascorbyl myristate in ultrasonic field was
studied. The dissolution rate of the reactants could be accelerated greatly by using ultrasonic, and the reaction time could be
reduced from 48 h to 4h. The productivity reached 77.58%, and the purity of purified products was 98.1%. The immobilized
lipase could be reused 4 times in ultrasonic field. L-ascorbyl myristate showed strong antioxidant activity similar to that
of L-ascorbyl palmitate and superior to that of tertiary butylhydroquinone (TBHQ) at an equal concentration as indicated
by hydroxyl radical and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacities and reducing power. The
antioxidant activity of L-ascorbyl myristate was still strong even when added to oils.

Key words: ultrasound, lipase-catalyzed synthesis, L-ascorbyl myristate, antioxidant activity

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