棕榈硬脂
化学
脂肪酶
棕榈酸
色谱法
基质(水族馆)
油酸
焦谷氨酸
摩尔比
酶
脂肪酸
溶剂
棕榈油
有机化学
食品科学
生物化学
催化作用
氨基酸
地质学
海洋学
作者
Xiaosan Wang,Cong Jiang,Wendi Xu,Zhicheng Miu,Qingzhe Jin
标识
DOI:10.1016/j.lwt.2019.108798
摘要
Structured triacylglycerols (TAGs), rich in 1,3-dioleoyl-2-palmitoylglycerol (OPO) and 1-oleoyl-2-palmitoyl-3-linoleoylglycerol (OPL), were prepared by enzymatic acidolysis of fractionated palm stearin with free fatty acids. The effects of enzyme type, substrate molar ratio, enzyme load, temperature, and reaction time on the yields of OPO and OPL, palmitic acid (PA) content at the sn-2 position of TAG, and the percentage of PA at the sn-2 position relative to total PA content were investigated. Under optimal reaction conditions (palm stearin/oleic acid/linoleic acid molar ratio of 1:8:4, lipase NS 40086 loading of 8%, 60 °C, 4 h), the combined yields of OPO and OPL was 69.26%, PA content at the sn-2 position reached 87.75%, and the relative percentage of PA at the sn-2 position was up to 71.07%. The synthesized TAGs have potential to be used in infant formulas.
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