南氷洋産Ophiodon sp. の脂肪酸組成

概要

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During the Antarctic whaling expedition of the 1951-52 season a fish was recovered in a fairly good condition from the stomach of a sperm whale siezed by a catcher-boat of the Kyokuyo Whaling Company on January 19, 1952. The fish was brought home to be identified as a species of Ophiodon that occurrs in the coastal region of the Antarctic. The authors, thereupon, separated the body oil from the fish to study the components of fatty acids of the oil. The procedures and results of the experiments are as follow: I. Preparation of the oil. The body oil was prepared from the abdominal region by boiling it with hot water. In oder to extract the oil from the residue of the tissue, water contained in the residue was distillated with alcohol-benzol mixture. The oils thus obtained were put together. II. Properties of the oil. (a) Analytical data of the oil is shown in Table 1. From these results, it it evident that this oil showed an iodine value lower than that of usual fish oils, though it contained a small amount (ca. 3.7%) of highly unsaturated fatty acid. (b) The mixed fatty acids yielded 9.24 per cent. of “solid” acids and 90.76 per cent, of “liquid” acids when tested by Bertram s method. (c) Analytical data of fractional distillation of “liquid” acids (Table 2) indicates that the “liquid” acids consisted mainly of oleic series, of which number of carbon were mostly C16 and C18.
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