酯交换脂肪
脂肪酶
食品科学
化学
脂肪酸
催化作用
生物化学
有机化学
酶
作者
Jinhua Baoyindugurong,J.H. Hou,Yi Ren,Ya‐Wen Li,Mailisi Heshuote,Hugejiletu,Naoki Ohara,Yukiko Naito,Kenjiro Tatematsu
摘要
Abstract The aim of this study is to combine flaxseed oil (FO), rich in α‐linolenic acid (ALA), with Sunite sheep tail fat (STF) through a lipase‐catalyzed transesterification reaction, in order to produce an edible oil with a fatty acid ratio suitable for human needs. Initially, the optimal conditions for esterification were determined using the Box–Behnken design, with the measurement criterion being the content of ALA at the sn‐2 position. The results indicated that the highest content of sn‐2 ALA was obtained under the conditions of using 6.8 wt% Lipozyme®RMIM as the catalyst, a reaction temperature of 57°C, a reaction time of 3.3 h, and a substrate mass ratio of 5.6:4.4 for STF and FO. This led to the rapid breaking and recombining of molecular bonds, resulting in the interesterified fat (IF) with the highest content of ALA at the sn‐2 position. Comparing STF and FO, IF exhibited excellent fatty acid composition and content. Furthermore, IF had a lower melting point and crystallization temperature compared to STF, and its solid fat content decreased with increasing temperature, completely melting at temperatures above 30°C. Thus, IF is a synthesized fat with excellent properties from both animal and vegetable sources.
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