ON THE YELLOWTAIL OIL-IV:ACETONE-SOLUBLE LIPID AND LECITHIN IN PYLORIC APPENDAGES

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The characteristics of the acetone-soluble lipid and lecithin contained in the pyloric appendages of yellowtail, Seriola quinqueradiata, were studied from the view point of lipid metabolism of fish. The acetone-soluble lipid was obtained in the yeild of 5.46% from the fresh pyloric appendages. The characteristics of this lipid are given in Table 1. Lecithin purified from the lecithin fraction was obtained in the yield of 0.20% from the fresh samples. The properties of the purified lecithin are shown in Table 2. Spectrum of the alkali-isomerized liquid acids separated from the lecithin indicated the presence of conjugated tri-to pentaenoic acids in the lecithin. According to rough calculation, the composition of the conjugated fatty acids of the lecithin seems to consist of 37.44% saturated and 62.56% unsaturated acids. The paper chromatography indicated the presence of myristic, palmitic, stearic, zoomaric, oleic, linolic and linolenic acids in the lecithin.
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