Physicochemical Properties and Oxidative Stability of Hen Egg-Yolk Oils Based on Different Laying Periods

Authors : Erman DUMAN

Pages : 12-16

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Publication Date : 2020-12-15

Article Type : Research Paper

Abstract :The aim of this study was to investigate and compare the physicochemical properties and nutritional value of hen egg-yolk oils based on different laying periods. Hen egg-yolk oils were extracted using solvents from double yolk insert ignore into journalissuearticles values(18 weeks);, guide insert ignore into journalissuearticles values(24 weeks);, pullet insert ignore into journalissuearticles values(30 weeks);, and jumbo insert ignore into journalissuearticles values(80 weeks); eggs. Weight and fat ratios of the hen eggs, as well as the free fatty acid content, peroxide value, iodine value, oxidative stability, fatty acid composition, and sterol composition of the yolk oils were determined in the study. According to the results of the analyses of white-shell eggs, the fat contents of the boiled egg insert ignore into journalissuearticles values(both the white and yolk);, fat contents of the egg yolk, free fatty acid values, peroxide values, and oxidative stability values were between 7.85 and 11.25%, 18.58 and 34.71%, 1.03 and 2.32%, 8.58 and 9.54 meq O2/kg, and 8.0 and 10.2 h, respectively. Palmitic and oleic were determined at the highest levels in all samples in the fatty acids. Cholesterol and campesterol were the two dominant sterols among the 10 sterol components. We determined that the physicochemical properties of white-shell egg-yolk oils varied according to different laying periods in terms of animal fat, and based on the 80-week laying period, egg-yolk oils were suitable for both internal and external consumption; the most ideal egg-yolk oils were extracted during the 30-week insert ignore into journalissuearticles values(pullet); period.
Keywords : LOHMANN white, egg yolk oil, fatty acid, sterol composition, oxidative stability, physicochemical properties