title: Determination of the energy expenditure of penned and grazing sheep from estimates of carbon dioxide entry rate.
mesh_terms: D000818:Animals; D001639:Bicarbonates / Q000378:metabolism; D002245:Carbon Dioxide / Q000097:blood / Q000378:metabolism*; D002247:Carbon Isotopes; D004777:Environment; D005260:Female; D007274:Injections, Intraperitoneal; D007279:Injections, Subcutaneous; D005082:Physical Exertion; D012119:Respiration; D012756:Sheep / Q000378:metabolism*
chemical_list: D001639:Bicarbonates; D002247:Carbon Isotopes; D002245:Carbon Dioxide