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5321830 
Journal Article 
Lipase-catalyzed acidolysis of canola oil with caprylic acid to produce medium-, long- and medium-chain-type structured lipids 
Wang, Y; Xia, L; Xu, X; Xie, L; Duan, Z 
2012 
Yes 
Food and bioproducts processing
ISSN: 0960-3085
EISSN: 1744-3571 
90 
C4 
707-712 
WOS:000310823500014 
Lipase-catalyzed acidolysis of canola oil with caprylic acid was performed to produce structured lipids (SLs) containing medium-chain fatty acid (M) at position sn-1,3 and long-chain fatty acid (L) at the sn-2 position in a solvent-free system. Six commercial lipases from different sources were screened for their ability to incorporate caprylic acid into the canola oil. The sn-1,3 regiospecificity toward the glycerol backbone of canola oil of the lipases with relatively higher acidolysis activity was compared by investigating the fatty acid profiles of the products. The results showed that Lipozyme RM IM from Rhizomucor miehei resulted in the highest caprylic acid incorporation ability and the lowest acyl migration. The reaction parameters including substrate mole ratio, enzyme load, reaction time and temperature of Lipozyme RM IM were investigated. Incorporation of caprylic acid was higher when reactions were carried with 10% lipase of the total weight of substrates with a 1:4 mole ratio of oil and caprylic acid. The optimal time course and temperature for synthesis SLs were 15 h and 50-60 degrees C. Possible triacylglycerol species and physical properties of the SLs product obtained at relative optimal conditions were characterized. (C) 2012 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. 
Acidolysis; Structured lipids; Canola oil; Caprylic acid; Lipases