title: Gaseous nitrogen evolution by animals? A study of nitrogen retention by rats and chicks.
mesh_terms: D000818:Animals; D002645:Chickens; D004044:Dietary Proteins / Q000378:metabolism; D005740:Gases / Q000378:metabolism; D013058:Mass Spectrometry; D009584:Nitrogen / Q000378:metabolism*; D051381:Rats; D012119:Respiration
chemical_list: D004044:Dietary Proteins; D005740:Gases; D009584:Nitrogen