African drying oils. V. Some nigerian and sudanese drying oils

Abstract

The fatty oils from the seeds of Hyptis spicigera and Ocimum viride from Nigeria, and of O. kilimandscharicum, Euphorbia calycina, E. erythracac, and Charozophora plicata from the Sudan, have been examined with reference to their component fatty acids and their suitability as drying oils. The oils of H. spicigera, O. kilimandscharicum and Euphorbia calycina closely resemble conophor oil in their fatty acids and their high content of linolenic acid; that of E. erythracae is very similar to linseed oil in composition, and C. plicata seed oil resembles cottonseed oil in its proportions of linolcic, oleic and saturated acids, Features in the distribution, cultivation, or harvesting of the seeds under discussion would appear to present certain difficulties in their commercial exploitation as compared with Tetracarpidium (conophor), but it is clear seeds which yield oils equal or superior to linseed oil in drying properties, as indicated by their respective contents of linolenic glycerides.

Fatty acid variation in seed oil amongOcimum species

“…The most abundant saturated acids included palmitic acid (6.1-11.0%) and stearic acid (2.0-4.0%) ( Table 2). These results emphasize important differences in the relative ratios of linoleic to linolenic acids in basil seed oils, and compare similarly to most literature values, which extend from 5 to 15% for oleic acid, 14 to 66% for linoleic acid, and 16 to 65% for linolenic acid (17)(18)(19)(20)(21)(22)(23)(24). There appears to be an inversion in the relative amounts of linoleic and linolenic acids among some species, inversions which are in agreement with the reported iodine values, ranging from 169 to 196.…”

Ocimum Kilimandscharicum : A Systematic Review

“…Seventeen constituents were identified in the oils obtained fro m leaves and flowers, the compositions of which were quite similar with linalool as the major constituent. This study demonstrated the occurrence of a linalool-camphor type of Ocimum kilimandscharicum Guerke18 , co mposition of constituents given in TableIII.…”

“…Characteristics of Seed Oil Of Ocimu m Kilimandscharicum Guerke Fo r use in paints, the seed oil is superior to linseed oil: the film obtained is hard with a bright finish18 . The residual oil, after the removal of camphor, suspended impurities and moistures, was an orange coloured liquid with camphoraceous odor and possessed the physicochemical constants given in the Table VI25 : …”