Denitrification.
D000397:Air Pollution; D001419:Bacteria / Q000378:metabolism*; D003470:Culture Media; D005516:Food Microbiology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D009609:Nitrous Oxide / Q000378:metabolism; D010084:Oxidation-Reduction; D010100:Oxygen / Q000494:pharmacology; D012722:Sewage; D012832:Silo Filler's Disease / Q000209:etiology; D012988:Soil Microbiology; D013696:Temperature; D014871:Water Microbiology
D003470:Culture Media; D009566:Nitrates; D009573:Nitrites; D012722:Sewage; D009569:Nitric Oxide; D009609:Nitrous Oxide; D010100:Oxygen