ラブカ肝油について

概要

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The unsaponifiable constituents of liver oil of a frill shark, Chlamydosslachus anguineus, (Figs. 1 and 2, and Table 1) were separated into hydrocarbon, fatty alcohol, cholesterol, and glyceryl ether fractions by Florisil column chromatography (Table 2). Cholesterol amounted to 17.0% in the unsaponifiable or 82mg/g of liver oil and this is considered to be a high value when compared to other shark liver oils. Although the glyceryl ether fraction obtained by the separation was 2.4%, the content of this is estimated to be around 0.7%, because of the low yield of acetonates. The composition of alcohols and long-chain alcohol groups of glyceryl ethers were analyzed by gas-liquid chromatography (Table 3). The main constituents are 18:1, 20:1, 16:0 alcohols in wax, and 18:1, 16:0 and 16:1 alcohol-chains in glyceryl ethers. Two fatty acid fractions were separated from the wax ester and triglyceride fractions (Fig. 3 and Table 5). The composition patterns of the acids showed little difference in the 22:1 and 22:6 acid contents. Compared with the already known composition of wax and fatty acids of other fishes it is assumed that glyceryl ethers in shark liver oil are probable intermediates between wax esters and triglycerides during their evolutional process.
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