title: [Ultradian respiratory rhythms in groups of Sprague-Dawley rats of both sexes].
abstract: Spectral analysis of the carbon dioxide emitted in controlled environmental conditions (temperature: 20-21 degrees C; humidity: 50-60%; lighting: 150 lux in LD12-12; background noise: 70 dB), by groups of 14 month old Sprague Dawleys, shows ultradian respiratory rates with periods of a 107-72 minute range for males and 107-45 minute for females. Moreover, VCO2 related to body weight is higher in females than in males.
mesh_terms: D000818:Animals; D001835:Body Weight; D002245:Carbon Dioxide / Q000032:analysis; D005260:Female; D008297:Male; D010507:Periodicity; D051381:Rats; D011919:Rats, Inbred Strains; D012119:Respiration; D012737:Sex Factors
chemical_list: D002245:Carbon Dioxide
vernacular_title: Rhythmes ultradiens respiratoires de groupes de rats Sprague Dawley des deux sexes.