MODIFICATION OF GOAT MILK-FAT TRIGLYCERIDES BY IMMOBILIZED LIPASE

The lipid fraction of goat milk was subjected to transesterification u sing a commercially available immobilized lipase to decrease the amoun t of short- and medium-chain fatty acids (C4C14) by enrichment of the reaction mixture with long-chain (C-18:1 and C-18:2) fatty acids. Aliq uots were taken during transesterification at different reaction times and analyzed for triglycerides and their fatty acid components. The g as chromatographic analyses of triglycerides (previously isolated by t hin-layer chromatography) showed that at 6 h reaction under the experi mental conditions led to the greatest reduction of the low molecular w eight triglycerides (C-22-C-38) and concomitantly to the greatest incr ease in the higher molecular weight triglycerides (C-48-C-54) These ch anges correlated with the variations observed in the fatty acids of th e triglyceride fraction.