Circadian variations in anesthetic requirement and toxicity in rats.
D000818:Animals; D001049:Apnea / Q000139:chemically induced; D002940:Circadian Rhythm; D003521:Cyclopropanes / Q000008:administration & dosage* / Q000633:toxicity; D003624:Darkness; D006221:Halothane / Q000008:administration & dosage*; D008027:Light; D008297:Male; D051381:Rats; D013997:Time Factors
D003521:Cyclopropanes; D006221:Halothane