Abstract
Lipids extracted from three pine seeds, Pinus koraiensis, Pinus armandi and Pinus cembra, were studied for general properties, fatty acid, sterol, phospholipids, and tocopherol content and autoxidation by the AOM test.
All the lipids contained 14.718.6 % of Δ cis-5, cis-9, cis-12-octadecatrienoic acid (Δ 5, 9, 12-18 : 3 and designated here tentatively as pinolenic acid). The content of this acid in polar lipids was considerably less than in neutral lipids. The content of pinolenic acid in 2-monoacylglycerol was very low (1.22.6 %) and was thus considered distributed mainly at the 1, 3-position.
Sterol composition consisted of three sterols, sitosterol, Δ 5-avenasterol and campesterol. Total sterol content of lipid extracted from P. armandi seeds was higher than that in the other two species.
Phosphatidylcholine (PC), phosphatidyl ethanolamine (PE) and phosphatidylinositol (PI) were present as the major phospholipids.
Total tocopherol content in pine seed lipids was less than in vegetable oils having high iodine value such as soybean oil and safflower oil. Oxidative stability by the AOM test was essentially the same as that of the above vegetable oils.
