| Popis: |
THIS laboratory has recently completed a series of assays designed to show whether or not estrogenic residues are present in the edible tissues of steers fed stilbestrol (Umberger, Curtis and Gass, 1959) or in the edible tissues of chickens injected with various preparations of stilbestrol (Umberger, Gass, Davis, Curtis and Durbin, 1959) to promote growth and fattening. For this purpose an assay method was developed based on the oral feeding of the tissue to the immature mouse and the use of the uterine weight as the criterion of response (Umberger, Gass and Curtis, 1958). An alternative method for estrogenizing poultry is the addition of dienestrol diacetate to the feed. Tiger, Mitchell and Goff (1956) have described the use of such a commercial preparation for the hormonizing of poultry. The estrogen is added to the feed of the poultry at the rate of 32 mg./lb. It seemed desirable to examine the … |
