title: Adjustment of the rat pineal N-acetyltransferase rhythm to eight-hour shifts of the light-dark cycle: advance of the cycle disturbs the rhythm more than delay.
abstract: After an 8-h delay of a light-dark (LD) cycle by lengthening of one light period, the rat pineal N-acetyltransferase (NAT) rhythm adjusted to the delay shift almost within one cycle. After an 8-h advance of the LD cycle by shortening of one dark period, the NAT rhythm adjusted to the advance shift within 5 cycles only; during the first 2-3 cycles the rhythm was abolished.
mesh_terms: D000123:Acetyltransferases / Q000378:metabolism*; D000222:Adaptation, Physiological; D000818:Animals; D001191:Arylamine N-Acetyltransferase / Q000378:metabolism*; D002940:Circadian Rhythm; D008027:Light; D008297:Male; D010870:Pineal Gland / Q000201:enzymology*; D051381:Rats; D011919:Rats, Inbred Strains; D014195:Travel
chemical_list: D000123:Acetyltransferases; D001191:Arylamine N-Acetyltransferase