title: Determination of the quantities of food and microbial nitrogen in duodenal digesta.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001419:Bacteria; D004386:Duodenum; D056890:Eukaryota; D009584:Nitrogen / Q000032:analysis*; D012417:Rumen / Q000382:microbiology*; D012756:Sheep / Q000378:metabolism*; D013460:Sulfur Isotopes
chemical_list: D013460:Sulfur Isotopes; D009584:Nitrogen