title: Studies on the activity of rumen protozoa. I. Role of ammonium ions and free amino acids in the regulation of nitrogen metabolism in rumen protozoa.
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D002020:Buffaloes; D056890:Eukaryota / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D010447:Peptide Hydrolases / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012417:Rumen / Q000382:microbiology*; D013696:Temperature
chemical_list: D000596:Amino Acids; D000644:Quaternary Ammonium Compounds; D010447:Peptide Hydrolases; D009584:Nitrogen