DenitrificationNitratesNitrate ReductaseNitrate ReductasesChloratesNitrite ReductasesNitritesNitrous OxideAnaerobiosisOxidation-ReductionNitrogen CompoundsVeillonellaNitrogenNitrogen IsotopesQuaternary Ammonium CompoundsRNA, Ribosomal, 16SAerobiosisPeriplasmAmmoniaDNA, RibosomalNitrate Reductase (NADH)Geologic SedimentsSilver NitrateDNA, BacterialDesulfitobacteriumSoil MicrobiologyMolybdenumEpsilonproteobacteriaIron-Sulfur ProteinsPhylogenySequence Analysis, DNABacteriaMolecular Sequence DataBetaproteobacteriaFormates