title: Photoperiodic termination of hamster refractoriness: participation of the pineal gland.
mesh_terms: D000818:Animals; D006224:Cricetinae / Q000502:physiology*; D004702:Endocrine Glands / Q000528:radiation effects; D008297:Male; D008550:Melatonin / Q000494:pharmacology; D009420:Nervous System / Q000528:radiation effects; D009431:Neural Conduction / Q000528:radiation effects*; D010775:Photic Stimulation; D010870:Pineal Gland / Q000502:physiology* / Q000528:radiation effects; D012032:Refractory Period, Electrophysiological / Q000528:radiation effects*; D012098:Reproduction / Q000187:drug effects / Q000528:radiation effects
chemical_list: D008550:Melatonin