Nitrogen FixationEnergy MetabolismLipid MetabolismNitrogen IsotopesNitrogen CompoundsBlood Urea NitrogenNitrogen CycleNitrogen DioxideReactive Nitrogen SpeciesCarbonMetabolismGlucoseNitrogen OxidesAmmoniaPII Nitrogen Regulatory ProteinsLiverNitratesOxidation-ReductionFertilizersBiotransformationQuaternary Ammonium CompoundsMetabolic Networks and PathwaysUreaGlutamate-Ammonia LigaseKineticsMolecular Sequence DataCytochrome P-450 Enzyme SystemMicrosomes, LiverGlycolysisModels, BiologicalCarbon IsotopesBiomassChromatography, High Pressure LiquidFatty AcidsBacterial ProteinsCarbon DioxideGene Expression Regulation, BacterialSoilOxygen ConsumptionSymbiosisTime FactorsCulture MediaNitrogen Mustard CompoundsPhosphorusMetabolism, Inborn ErrorsPlant LeavesNitrogenaseMutationPlant RootsMagnetic Resonance SpectroscopyCarbon RadioisotopesOxygenBody WeightDietInsulinAmino AcidsFermentationAcetatesLactic AcidCitric Acid CycleLactatesDigestionBiological TransportPhotosynthesisKetoglutaric AcidsBlood GlucoseHydrogen-Ion ConcentrationGene Expression ProfilingAnimal FeedAnaerobiosisBase SequenceRNA, MessengerOxidoreductasesCytochrome P-450 CYP3ATriglyceridesFecesSulfurAmino Acid SequenceAerobiosisGenes, BacterialCholesterolSpecies SpecificityBacteriaGlutamineAcetyleneRats, Sprague-DawleyPyruvic AcidMass SpectrometryAryl Hydrocarbon HydroxylasesNitrogenNitritesRats, Inbred StrainsLipidsAmmonium CompoundsAllantoinMitochondriaGene Expression Regulation, FungalBasal MetabolismGlutamate SynthaseCells, Cultured