AbstractStillingia oils from three specimens of seeds ofSapium sebiferumand from two specimens of seeds of S.discolorhave been examined and the composition of their fatty acids determined. The component acids include about 5 of deca‐2 : 4‐dienoic acid, 8 of oleic and 12 of saturated acid, with about 75 of linoleic and linolenic acids as the major components. The proportions of the latter acids vary both with the species and, in the same species, with seasonal conditions : linolenic acid ranges from about 50 to 35. and linoleic from about 25 to 40. The oils from S.discoloralso contain up to 1 of elaeostearic acid, which has not‐been found in any of the oils from S.sebiferum.A further specirrlen of commercial stillingia oil has also been examined, and again found to contain about 1 of elaeostearic acid. Since the commercial oil is believed to originate fromS. sebiferum, slight contamination with tung oil may be the source of the elaeostearic acid which has now been frequently observed in commercial stillingia
展开▼
