title: A difference in the effect of rat liver extract (chalone) on the mitotic index of chick embryo liver when extracted at different times of day.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002940:Circadian Rhythm; D006131:Growth Inhibitors / Q000494:pharmacology*; D008099:Liver / Q000502:physiology*; D008938:Mitosis / Q000187:drug effects*; D051381:Rats
chemical_list: D006131:Growth Inhibitors