Biomedical subjects
Y El-Shattory
Publications and source records attributed to Y El-Shattory.
Biochemical changes in cottonseed during development and maturity.
The changes in cottonseed constituents at different boll ages ranging from 5 to 60 days after flowering are reported. A gradual depletion of sugars coincided with gradual formation of oil has been found. Proteins are accumulated at a more or less even rate. Gossypol starts its appearance in 10 days old boll, and continuously increases. The iodine value of the oils shows gradual increase, while the acid value continuously decreases. Continuous decrease in total saturated fatty acids during development and maturity was observed while linoleic acid continuously increases. The total phospholipid content of the oil continuously decreases. The total saturated fatty acid contents of the phospholipids are generally higher than that of their corresponding oils.
Chromatographic column fractionation and fatty acid composition of different lipid classes of linseed oil.
Linseed oil is fractionated on silicic acid column, with subsequent identification of different lipid classes by thin layer chromatography. Sterol esters, triglycerides, free fatty acids, sterols and phospholipids represent 0.15, 92.25, 3.30, 1.15 and 1.16%, respectively of linseed lipids. The total saturated fatty acid content of the phospholipid fraction is higher than that of the oil, the triglyceride fraction and the free fatty acid fraction. Linolenic acid, which is the major fatty acid in linseed triglycerides (47.5%), makes 18.2% of the phospholipid fatty acids. Oleic acid is the major fatty acid in the phospholipid fraction (35.2%), while it constitutes 19.3% of the triglycerides fatty acids.