title: Retention of intravenously administered 15N-labelled urea in sheep.
mesh_terms: D000821:Animal Feed; D000818:Animals; D001665:Binding Sites; D007275:Injections, Intravenous; D009587:Nitrogen Isotopes; D012417:Rumen / Q000378:metabolism / Q000502:physiology; D012756:Sheep / Q000378:metabolism*; D014508:Urea / Q000008:administration & dosage / Q000378:metabolism* / Q000652:urine
chemical_list: D009587:Nitrogen Isotopes; D014508:Urea