Combs G F
Poult Sci. 1978 Jan;57(1):223-9. doi: 10.3382/ps.0570223.
Experiments were conducted to evaluate the utilization of d1-alpha-tocopherol, d1-alpha-tocopheryl acetate and a water-soluble ester, d-alpha-tocopheryl polyethylene glycol 1000 (TPGS), as dietary sources of vitamin E for the chick. Results showed that tocopheryl acetate is utilized with efficiency equal to that of vitamin E alcohol at dietary concentrations less than or equal to approximately 40 ml d1-alpha-tocopherol equivalents per kg. At greater dietary concentrations of the vitamin, the alcohol form appeared to be better utilized than the acetate when it was adequately stabilized in the diet. However, TPGS was poorly utilized at all dietary levels examined. Saponification of both esters improved the utilization of vitamin E from these sources. The utilization of all forms of vitamin E was depressed in hypervitaminotic A chicks and, to a lesser extent, in chicks fed ethoxyquin.
进行了实验以评估d1-α-生育酚、d1-α-生育酚乙酸酯和一种水溶性酯d-α-生育酚聚乙二醇1000（TPGS）作为雏鸡日粮中维生素E来源的利用率。结果表明，在日粮浓度小于或等于每千克约40毫克d1-α-生育酚当量时，生育酚乙酸酯的利用率与维生素E醇相当。当维生素在日粮中得到充分稳定时，在更高的日粮浓度下，醇形式似乎比乙酸酯形式更易被利用。然而，在所检测的所有日粮水平下，TPGS的利用率都很低。两种酯的皂化作用提高了这些来源维生素E的利用率。在维生素A过多的雏鸡中，所有形式维生素E的利用率均降低，在饲喂乙氧喹的雏鸡中，维生素E利用率降低的程度较小。
