食品科学
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罗慧文,李 卓*
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LUO Hui-wen, LI Zhuo*
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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
中图分类号:
TS202.3
罗慧文,李 卓*. 超声波场中酶法合成L-抗坏血酸豆蔻酸酯及其抗氧化性[J]. 食品科学, doi: 10.7506/spkx1002-6630-201410021.
LUO Hui-wen, LI Zhuo*. Synthesis and Antioxidant Activity of Lipase-Catalyzed L-Ascorbyl Myristate in Ultrasonic Field[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201410021.
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链接本文: https://www.spkx.net.cn/CN/10.7506/spkx1002-6630-201410021
https://www.spkx.net.cn/CN/Y2014/V35/I10/115