Chernikov M P, Smirnova L I, Bulycheva E M, Sorokina N V, Usacheva N T
Vopr Pitan. 1977 Nov-Dec(6):12-5.
The assimilation of milk proteins in dynamics by rats during the first 23 days of their life was studied. During this time the animals were kept on a natural milk feeding and were denied the maternal one. Data on the amount of consumed protein and on an increase of the protein content in the carcass in 2- and 4-day long intervals served as a basis for determining the degree of effective utilization of protein (U) by rats. It is shown that the degree of the food protein, while remaining at a high level, experienced certain changes. It is possible to distinguish three periods in the change of this value: the first--starting from birth up to 5 days, with U rising from 74,5 up to 92.1 per cent, the second period, the milk diet proper,--up to the 15th day, marked by a high value of U (approximately 93 per cent) and, finally, the third period--transitional to the ration of an adult animals--marked by a drop of U down to 67.8 per cent. The data obtained may be used in considering issues related to features specific for the processes of the protein assimilationin in the early post-natal period.
研究了大鼠出生后前23天内对乳蛋白的动态同化情况。在此期间，动物采用天然乳喂养，不进行母源性喂养。以2天和4天为间隔的蛋白质摄入量数据以及胴体蛋白质含量的增加数据，作为确定大鼠蛋白质有效利用率（U）的依据。结果表明，食物蛋白质的利用率虽保持在较高水平，但也经历了一定变化。该值的变化可分为三个阶段：第一阶段——从出生到5天，U从74.5%上升至92.1%；第二阶段为纯乳饮食阶段——直至第15天，其特点是U值较高（约93%）；最后是第三阶段——向成年动物日粮过渡阶段，其特点是U值降至67.8%。所得数据可用于探讨与出生后早期蛋白质同化过程特定特征相关的问题。
