title: Diurnal rhythm in serum testosterone levels and thymidine uptake by testes in the domestic fowl.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002645:Chickens / Q000502:physiology*; D002940:Circadian Rhythm; D007267:Injections; D008297:Male; D011863:Radioimmunoassay; D013737:Testis / Q000378:metabolism*; D013739:Testosterone / Q000097:blood*; D013936:Thymidine / Q000008:administration & dosage / Q000378:metabolism*; D014316:Tritium
chemical_list: D014316:Tritium; D013739:Testosterone; D013936:Thymidine