Oil from
Ommastrephes sloani pacificus (from the Hokkaido) has of late been watched with interest as a source of cholesterol. From 10kg of oil, 150g of unsaponifiable substance were obtained which did not contain any sterol substance other than cholesterol although it did contain batyl alcohol. The oil itself was esterified and from the distillation residue of fatty acid ester were obtained two substances of m.p. 78° and 144°, respectively. The former was identified as cholesterol-palmitate and the latter, a free cholesterol.
Body oil of
Chollarinus alascanus (caught in Choshi in 1944) was examined with absorption spectrum and it was found to contain 180 units of vitamin A in its unsaponifiable substances but no vitamin D. General properties of this oil are as follows:
m.p. 17-19°; specific gravity at 30°, 0.9085; refractive index, n
D401.4700; saponification value, 182.6; unsaponifiable matter; 0.82% (containing 25.8% sterol); iodine value (Wijs). 137.3; acid value, 1.64; Reichert Meissel value, 0.49; Polenske value, 1.36; acetyl value, 13.18. Fatty acid, m.p. 20°; solidifying point 14°; neutralization value, 185.9; iodine value, 99.9; refractive index, n
D401.4622.
The unsaponifiable substance from the body oil of
Phoca vitulina L. (caught in Kurilles Is. in 1942) also contained vitamin A and was positive to SbCl
3. The values of the oil were: sp. gr. at 30° 0.9101; saponification value, 194.6; unsaponifiable matter, 0.18%; iodine value, 155.7. Fatty acid; neutralization value, 200.5; iodine value, 118.6.
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