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        계란의 내용물과 난각의 특성에 관한 연구

        최진호,강원준,백동훈,박홍석 ( Jin Ho Choi,Won Joon Kang,Dong Hoon Baik,Hong Suk Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6

        A total of 999 eggs, randomly collected from a flock of 2,000 hens of White Shaver strain that had been in production for seven months was tested to investigate interrelationships between egg weight and weight of each fraction of egg and between egg weight and shell quality. Egg weight, weights of yolk, albumen and shell, specific gravity of egg and sheaf thickness were measured for each egg. Percentages of fraction weights out of egg weight were calculated and designated respectively as % yolk, % albumen and % shell. Correlations were also investigated among four parameters involved in shell quality. Following results were obtained. 1. Mean (±SD) weight of total eggs tested was 58.72±4.80 g. and mean weights of fractions were 17.08 g. for the yolk, 35.22 g. for the albumen and 5.21 g. for the shell which were equivalent to approximately 30, 60 and 9% respectively of egg weight. 2. Correlation coefficients of egg weight were 0.89 with albumen weight, 0.54 with yolk weight and 0.53 with shell weight, indicating that variation in egg weight was mainly due to variation in albumen weight and egg weight was less influenced by yolk and shell weights. 3. As egg weight decreased weights of all three fractions also decreased. However, the pace of changing was much greater in albumen weight than in yolk weight, resulting in that % yolk increased as egg weight decreased. 4. There were found positive correlations between egg weight and both shell thickness and egg specific gravity, indicating that as egg size decreased shell quality decreased. 5. High correlation coefficients were observed between any pair of four parameters of shell quality measured, which were shell weight, % shell, shell thickness and egg specific gravity.

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