酶法合成sn-2位富含DHA的中长链结构脂Enzymatic synthesis of medium and long-chain structured lipids rich in docosahexaenoic acid at sn-2 position
采用两步酶法制备sn-2位富含DHA的中长链结构脂。首先,利用固定化脂肪酶Lipozyme 435催化DHA藻油发生醇解反应,溶剂萃取以获得富含DHA的单甘酯,再利用脂肪酶催化单甘酯和癸酸的酯化反应合成sn-2位富含DHA的中长链结构脂,并对中长链结构脂的组成进行分析。结果表明,最优酶法酯化反应条件为真空度0.05 MPa,单甘酯与癸酸摩尔比1∶ 3,固定化脂肪酶Lipozyme TL IM添加量为底物质量的8%,反应温度25 ℃,反应时间9 h。在最优条件下,酯化产物中甘油三酯(TAG)含量为96.55%,TAG脂肪酸组成中,DHA占总脂肪酸的40.04%,占sn-2位脂肪酸的72.15%。...
Main Author: | 姜萱, 杨瑶, 徐秀丽, 晁仲昊, 张石群, 程阳, 邹孝强 JIANG Xuan, YANG Yao, XU Xiuli, CHAO Zhonghao, ZHANG Shiqun, CHENG Yang, ZOU Xiaoqiang |
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Format: | Article |
Language: | English |
Published: |
中粮工科(西安)国际工程有限公司
2022-06-01
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Series: | Zhongguo youzhi |
Subjects: | |
Online Access: | http://tg.chinaoils.cn/ch/reader/create_pdf.aspx?file_no=20220611&year_id=2022&quarter_id=6&falg=1 |
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