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SOMATOTROPIN RESPONSE TO CORTICOSTERONE AND THE THYROID HORMONE T3 DURING CHICK EMBRYONIC DEVELOPMENT: INVOLVEMENT OF TYPE I AND TYPE II GLUCOCORTICOID RECEPTORS
Corticosterone (CORT) can stimulate growth hormone (GH) cell (somatotroph) differentiation and GH secretion on embryonic day (e) 12 but not e20 in the chicken. GH induction involves both glucocorticoid receptors (GR) and ...
Regulation of Urea Recycling into the Gastrointestinal Tract and Ammonia Metabolism in Ruminants
The primary objective of this study was to determine the extent ruminants control urea recycling to the gastrointestinal tract (GIT), independent of rumen microbial metabolism. Urea kinetics were determined by continuous ...
EFFECTS OF MILK UREA NITROGEN AND OTHER FACTORS ON PROBABILITY OF CONCEPTION OF DAIRY COWS
The objective of the present study was to evaluate the relationships among milk urea nitrogen (MUN) and other factors with the probability of conception in dairy cows. A total of 713 dairy herds and 10,271 dairy cows were ...