A sample of Olea oil obtained from the local market in Khartoum (Sudan) was analyzed by some chromatographic methods. The saponifiable and the unsaponifiable contents of the oil were determined ,which were found 79.08 % and 0.712% , respectively. It was found that the oil contains 69% fatty acids and 0.7 % sterols. The percentages of the fatty acids Stearic , Palmitic , Oleic and Linoleic in th...

The development by collaborative study of a standardised method for the determination of the stigmastadienes content in vegetable oils is described. The procedure involves the isolation of the unsaponifiable matter in the oil ands its fractioning on a silica gel column. The fraction containing the steroidal hydrocarbons is then analysed by capillary gas chromatography and the quantitative asses...

Lanosterol and related CzO sterols occur in considerable quantity in wool fat but have not so far been isolated from the principal sites of sterol biogenesis in the animal body. Evidence for the presence of this type of sterol in internal organs does, however, exist, since the formation of lanosterol from acetate and its conversion to cholesterol in homogenates of rat liver have recently been d...

For the estimation of total lipids in the feces a number of excellent methods are available, which depend upon primary saponification of the material. When the fat partition is to be determined, however, it becomes necessary to use extraction procedures, a number of which are described in the literature. A method widely used is that of Holt, Courtney, and Fales (l), which is essentially an adap...

IN a series of papers [Chibnall and Channon, 1927, 1, 2, 3; Channon and Chibnall, 1927], we have recorded certain results which we have obtained in the analysis of the ether extract of the leaf-cell cytoplasm of the cabbage. The object of the present paper is to discuss these results so far as is at present possible from their chemical and physiological aspects, and, in passing, to refer to our...