Abstract
This study aimed to incorporate capric acid (CA) into selected algal oils, namely arachidoinc acid single cell oil (ARASCO), docosahexaenoic acid single cell oil (DHASCO) and the OMEGA-GOLD oil rich in dcosahexaenoic acid (DHA) and dosapentaenoic acid (n-6 DPA). Response surface methodology indicated that under optimum conditions (12.3% enzyme, 45 degrees C, and 29.4 h) CA incorporation was 20.0% into ARASCO; (4.2% enzyme, 43.3 degrees C, and 27.1 h) 22.6% into DHASCO and (2.5% enzyme, 46.6 degrees C and 25.2 h) 20.7% into the OMEGA-GOLD oil. Stereospecific analysis indicated that in all oils examined CA was mainly located at the sn-1 and sn-3 positions of the resultant TAG molecules while the highly unsaturated fatty acids being primarily esterified to the sn-2 positions of the three oils. In all cases, enzymatically modified oils were more susceptible to oxidation than their unmodified counterparts.
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