title: Gas chromatography/mass spectrometric determination of [15N]urea in plasma and application to urea metabolism study.
mesh_terms: D000409:Alanine / Q000378:metabolism; D000818:Animals; D004285:Dogs; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D009584:Nitrogen / Q000097:blood* / Q000378:metabolism / Q000652:urine; D009587:Nitrogen Isotopes; D014508:Urea / Q000378:metabolism*
chemical_list: D009587:Nitrogen Isotopes; D014508:Urea; D009584:Nitrogen; D000409:Alanine