Abstract
ABSTRACTSesame oil was modified to incorporate capric acids (C10:0) with an immobilized lipase, IM60, from Rhizomucor miehei. Transesterification was performed with and without organic solvent. After 24 h incubation in hexane, there was an average of 28.3±3.5 mol% incorporation of C10:0 into sesame oil. The solvent‐free reaction produced an average of 25.7p±4.3 mol% capric acid. As enzyme load, substrate mole ratio, and incubation time increased, mol% capric acid incorporation also increased. For the time course reaction, incorporation of C10:0 increased up to 34.3 and 25.3 mol%, at 72 h and 8 h, for the hexane and solvent‐free reactions, respectively. The highest C10:0 incorporation (62.2 mol%) occurred at a mole ratio of 1:7 (sesame oil/C10:0) in hexane and for the solventfree reaction (35.7 mol%) was obtained at a mole ratio of 1:5 and 1:7. At a lipase load of 15%, incorporation of C10:0 reached optimal values of 30.0 and 25.2 mol% for the reactions with and without hexane, respectively. There was a decline in mol% incorporation of C10:0 into sesame oil in hexane with the addition of increasing amounts of water ranging from 0–12%. With no added water, C10:0
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