| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing oils and fats containing a high percentage of docosahexaenoic acid which enables high quality oils and fats with high content of DHA to be obtained from bonito oil or tuna oil at a high yield and a low cost. SOLUTION: Oils and fats which contain docosahexaenoic acid >=40 wt.% and of which the color, the anisidine value and the odor are improved are obtained by hydrolyzing bonito oil or tuna oil as raw material with use of lipase under the condition that the reaction temperature is 30-35 deg.C and the reaction time is 15-25 hour, eliminating water, enzyme protein or the like from the reaction system after the reaction is over and then processing the product by deoxidation, decoloration and deodorization.
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