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http://dx.doi.org/10.3746/jkfn.2009.38.8.1062

Synthesis of Functional Lipid from Glyceryl Monooleate and Conjugated Linoleic Acid by Enzymatic Reaction  

Jeon, Mi-Sun (Dept. of Food Science and Technology, Chungnam National University)
Lee, Ki-Teak (Dept. of Food Science and Technology, Chungnam National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.38, no.8, 2009 , pp. 1062-1068 More about this Journal
Abstract
Diacylglycerol (DAG) were synthesized by enzymatic esterification of glyceryl monooleate (GMO) and conjugated linoleic acid (CLA) in a shaking water bath. The reaction was catalyzed by Lipozyme TLIM (immobilized lipase from Thermomyces lanuginosa). Effects of reaction time, molar ratio, enzyme road and molecular sieves were studied. Results of normal-phase high performance liquid chromatography (NP-HPLC) analysis were performed. At 1:1, 2:1 and 3:1 (GMO : CLA) molar ratio and Lipozyme TLIM of 20% amount, DAG were produced in 42.6, 54.4 and 54.6 area% in 1 hr, respectively. When different Lipozyme TLIM amounts (2, 5, 10, 20%) were used with 2:1 (GMO : CLA) molar ratio, DAG were produced 21.4 (24 hr), 51.7 (12 hr), 56.2 (6 hr) and 54.4 (1 hr) area%, respectively. The reaction in the absence of molecular sieves increased DAG contents. The maximum DAG concentration conditions were obtained with molar ratio of 2:1 (GMO : CLA), lipase concentration of 10% (of substrate), 10% molecular sieves and reaction time of 6 hours at 55$^{\circ}C$. Under this reaction condition, produced DAG-rich oil was composed of 69 area% DAG, 7.9 area% TAG, 2 area% FFA, and 21.1 area% MAG.
Keywords
diacylglycerol-rich oil; glyceryl monooleate; conjugated linoleic acid; Lipozyme TLIM; shaking water bath reactor;
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