T. C. Byerly
United States Department of Agriculture
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by T. C. Byerly.
Experimental Biology and Medicine | 1936
William Burrows; T. C. Byerly
Conclusions It has been found that single fowl pituitaries implanted over the crop glands of 8- to 10-weeks-old pigeons (age computed from time of conception) will, in many instances, cause a prolactin-like reaction. It is assumed that this reaction is caused by prolactin in the pituitaries of the donating fowls. Pituitaries from broody hens cause a greater reaction of the pigeon crop gland than the pituitaries of laying hens. Pituitaries from males cause a reaction about equal to, or slightly less, than the pituitaries from laying hens. It was noted in a few cases that the pituitaries of hens just becoming broody gave a greater reaction than those of hens nearly over their broody period. More data are being gathered on this point.
Experimental Biology and Medicine | 1935
T. C. Byerly; Harry W. Titus; N. R. Ellis; W. Landauer
Summary and Conclusions Abnormal embryos and chicks, with relatively short bones, were frequently produced in eggs laid by birds which received diets lacking in some factor or factors present in wheat germ, liver, and whey. The activity, amount or utilization of this factor or these factors was augmented by permitting the birds access to direct sunlight and green range.
Experimental Biology and Medicine | 1936
William H. Burrows; T. C. Byerly; Everett I. Evans
Of the various existing tests for the male sex hormone, that of the capon comb is generally recognized as being the most satisfactory. The cost of capons and their upkeep is a hindrance to wide use of this test. If baby chicks can be utilized to test for male hormone properties, the cost of such tests will be materially reduced. The purpose of this investigation was to determine whether the comb of the baby chick is sufficiently sensitive to the action of male sex hormone to warrant the more extensive experiments necessary to establish that the baby chick may be used as a test object. † As a preliminary experiment 3 groups of day-old, Single-comb White Leghorn chicks (7 chicks to the group) were injected subcutaneously with the male hormone product testosterone. A fourth group of 7 chicks was carried as controls. Group 1 received 25 gamma daily, and group 3 received 100 gamma. After 4 injections, 2 chicks of Group 1, 5 chicks of Group 2 and all those in Group 3 showed a definite increase in comb growth. Injections were continued on 3 chicks selected from Group 3. After 14 daily (except Sunday) injections these 3 chicks were photographed with their controls. Fig. 1 shows one of these chicks with its control. In a second series of experiments, 117 other chicks were injected, some with testosterone and some with androsterone. Single-comb White Leghorns and Rhode Island Reds of both sexes were used. Their ages varied from 1 to 10 days of age, and injections of various amounts of material were made either in the base of the comb or in the breast muscle. Table I shows the results obtained.
Poultry Science | 1938
William H. Burrows; T. C. Byerly
Journal of Morphology | 1930
T. C. Byerly
Journal of Experimental Zoology | 1938
T. C. Byerly; W. G. Helsel; J. P. Quinn
Poultry Science | 1936
M. W. Olsen; T. C. Byerly
Poultry Science | 1938
T. C. Byerly
Poultry Science | 1937
T. C. Byerly; M. W. Olsen
Poultry Science | 1935
T. C. Byerly; Morley A. Jull