Studies on the Seed Oils from Two Species of Rosaceae

Abstract

Seed oils from two species of Rosaceae (Karin and Boke) were examined on their general properties, on the fatty acid compositions determined by GLC and on the characteristics of unsaponifiable matters. The oils were obtained by extracting the dried seeds with ether. The general properties were as follows; Karin (d114 0, 9264; n22D 1.4710, IV 98.1, AV 1.4, S.V 189.7), Boke (d204 0.9166, n20D 1.4699, I.V, 80.6, A.V, 4.3, S.V 197.6). The fatty acid compositions were C10:0, 1.7, C14:0, 0.9; C14:1(?), 0.3, C16:0, 13.5, C18:0, 1.3, C18:1, 22.5, C18:2 50.5, C18:3(?) 1.1, C20:0 2.6, C20:1(?) 3.1, C22:0 2.5 in the case of Karin, and C10:0 4.3, C14:0 0.8 C14:1(?) 0.5 C16:0 7.3, C16:1(?) 0.6, C18:0 1.2, C18:1, 50.7, C18:2, 26.7; C18:3(?), 1.0, C20:0, 3.4, C20:1(?), 3.5 in the cace of Boke. The unsaponifiable matters were both yellowish orange soft-solid. The sterol-percentages in unsaponifiable matters were 22.6% (Karin), and 28.4% (Boke). The main sterols of Karin and Boke were both considered to be β-sitosterol from the data of their melting points, IR absorption spectra and GLC of the sterols and their acetates.