title: Effect of melatonin and short photoperiod on delta 4-reductase activity in liver and hypothalamus of the hamster and the rat.
mesh_terms: D000818:Animals; D001835:Body Weight; D006224:Cricetinae; D003864:Depression, Chemical; D007031:Hypothalamus / Q000201:enzymology*; D008027:Light; D008099:Liver / Q000187:drug effects / Q000201:enzymology*; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D009929:Organ Size; D010088:Oxidoreductases / Q000032:analysis*; D051381:Rats; D012669:Seminal Vesicles / Q000033:anatomy & histology; D013737:Testis / Q000033:anatomy & histology; D013739:Testosterone; D013997:Time Factors
chemical_list: D013739:Testosterone; D010088:Oxidoreductases; D008550:Melatonin