動物体の角質化組織中の脂質成分に関する研究 (第3報) : ホルスタインのヒズメの脂質成分

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The authors intended to investigate on the lipid compositions in the horny tissues of animals, as previously reported on the crystal lens of tunny (Thunnus thynnus orientalis), the scales of Kinmedai (Beryx splendeus Lows) and the tendon of Sardine-whale (Balaenoptera borealis Lesson). The present report deals an attempt on analyses of the lipid components of holsteins hoofs with regard to fatty acids, unsaponifiable matters. The hoofs were powderd with power saw and extracted with ether. The properties of ether extract and acetone soluble matters were showed in Table-1. The fatty acid compositions (%) analysed by means of gas chromatography were as follows; C10 : 0, 1.1; C12 : 0, 1.8; C14 : 0, 1.1; C16 : 0, 28.2; C10 : 1, 1.2; C12 : 1, 1.6; C14 : 1, 0.8; C14 : 2, 0.2; C16 : 1, 0.7; C16 : 2, 1.2; C18 : 1, 56.2; C20 : 1, 2.6; C20 : 2, 2.0. On the other hand, those calculated from spectrometric analysis were as follows; F0, 32.2; F1, 53.8; F2, 8.6 (conjtd. 5.6); F3, 4.0 (conjtd. 0.1); F4, 1.4; F5, 0.2; F6, 0.2. The crude unsaponifiable matter was yellowish solid containning white crystal, and the properties were as follows; IV, 53.6; mp, 56°C and the sterol content is 80.8% (precipitated by digitonin). The main sterol is a cholesterol containning a small quantity of a matter considered to be 3-ketocholesten (cholest-5-en-3-on). The remaining parts of the unsaponifiable matters seemed to be hydrocarbons.
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