Newcomer W S
Poult Sci. 1976 Jan;55(1):60-9. doi: 10.3382/ps.0550060.
White Leghorn cockerels were fed a broiler ration containing 0 (controls), 0.02 or 0.04% Protamone (iodinated casein) either continuously or for 10-14 days after which the 0.02% Protamone ration was switched to control or vice versa. Body growth rate was temporarily suppressed during the first 14 days of feeding 0.02% Protamone. Thyroid weight was promptly depressed during feeding of Protamone and increased more slowly when Protamone was removed from the feed. Only a fleeting increase in oxygen consumption rate was detectable in birds fed either 0.02 or 0.04% Protamone. Serum T4 and T3 promptly rose when Protamone was fed; continued feeding resulted in compensatory adjustments in secretion and perhaps peripheral metabolism of iodohormones within 2-3 days so that a level close to 200 ng. T3 or 2.5 mug T4/100 ml. serum was subsequently maintained.
给白来航公鸡喂食含0（对照）、0.02%或0.04%Protamone（碘化酪蛋白）的肉鸡日粮，持续喂食或喂食10 - 14天，之后将含0.02%Protamone的日粮换成对照日粮，反之亦然。在喂食0.02%Protamone的前14天，身体生长速率暂时受到抑制。在喂食Protamone期间，甲状腺重量迅速降低，当从饲料中去除Protamone时，甲状腺重量增加得更慢。在喂食0.02%或0.04%Protamone的鸡中，仅检测到耗氧率有短暂增加。喂食Protamone时，血清T4和T3迅速升高；持续喂食导致在2 - 3天内碘激素的分泌以及可能的外周代谢发生代偿性调整，从而随后维持接近200 ng T3或2.5 μg T4/100 ml血清的水平。
