AcetyleneGasesNitrogenaseEthaneNitrogen FixationAlkynesTungstenAzotobacterNitrosomonasHydrocarbons, AcyclicEthylenesNitrous OxideMolybdoferredoxinHydrogenDeltaproteobacteriaOxidation-ReductionMethaneAzotobacter vinelandiiChromatography, GasGas Chromatography-Mass SpectrometryMolybdenumPropaneNitrogenSpirillumAmmonia