title: Variations in levels of plasma thyroxine and triiodothyronine in juvenile female chickens during 24- and 16-hr lighting cycles.
mesh_terms: D000818:Animals; D002645:Chickens; D002940:Circadian Rhythm; D003624:Darkness; D005260:Female; D006339:Heart Rate; D008027:Light; D008029:Lighting; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*
chemical_list: D014284:Triiodothyronine; D013974:Thyroxine