Daily rhythm in the accumulation of brain catechol-amines synthesized fom circulating H3-tyrosine.
D000818:Animals; D001921:Brain / Q000378:metabolism*; D001923:Brain Chemistry; D002395:Catecholamines / Q000096:biosynthesis*; D002940:Circadian Rhythm; D003624:Darkness; D008027:Light; D008297:Male; D051381:Rats; D013997:Time Factors; D014316:Tritium; D014443:Tyrosine / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism*
D002395:Catecholamines; D014316:Tritium; D014443:Tyrosine