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To utilize the mackerel viscera effectively, antioxidant substances were extracted and the effects on the oxidation were evaluated. Total lipid(TL) extracted from mackerel viscera were fractionated into hexane extracts, tetracarbon chloride($CCl_4$)-methanol(1 : 1, 1 : 3, 1 : 9, v/v) extr...

To utilize the mackerel viscera effectively, antioxidant substances were extracted and the effects on the oxidation were evaluated. Total lipid(TL) extracted from mackerel viscera were fractionated into hexane extracts, tetracarbon chloride($CCl_4$)-methanol(1 : 1, 1 : 3, 1 : 9, v/v) extracts, phospholipid(PL), phosphatidylcholine(PC), and PC free fracitons(PCF). Inhibition of fish oil oxidation was investigated using these fractions. Hexane fraction showed lower antioxidant activity compared to the TL or $CCl_4-methanol$ fractions(C-M) ; in addition, antioxidant activities increased as polarity of C-M increased. Significant antioxidant activities were observed with PL, PC, and PCF ; among them, PC was the most effective. To determine the antioxidant activity of PC, effects of natural or synthetic antioxidant were compared. Addition of PC to fish oil proved to enhance antioxidant activity the antioxidant activity of phospholipids was derived mainly from PC.

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