Nitrogen CycleCallunaAtmosphereNitrogenSoilEcosystemPoaceaeCarbonRainBiomassPlant DevelopmentNitratesTreesClimateBiodiversityWaterNitrogen FixationNitrogen CompoundsNitrogen IsotopesBlood Urea NitrogenNitrogen DioxideReactive Nitrogen SpeciesNitrogen OxidesPII Nitrogen Regulatory ProteinsAmmoniaFertilizersQuaternary Ammonium CompoundsAerosolsUreaMolecular Sequence DataGlutamate-Ammonia LigaseAmino AcidsTime FactorsNitrogen Mustard CompoundsComplement C3AmyloidosisNitrogenasePlant LeavesSymbiosisMutationAmyloid beta-PeptidesFibrinPlant RootsBacterial ProteinsCollagenKineticsParticle SizeCulture MediaDisease Models, AnimalPhosphorusModels, BiologicalAnimal FeedLungDigestionCattlePlaque, AmyloidAmyloidLiverRNA, MessengerGlutamineBase SequenceCells, CulturedOxidation-ReductionAmino Acid SequenceBody WeightKidneySwineHydrogen-Ion ConcentrationExtracellular MatrixComplement ActivationAcetyleneGene Expression Regulation, BacterialEnvironmental MonitoringMicroscopy, ElectronAir PollutantsDietMice, Inbred C57BLNitritesAlzheimer DiseaseNebulizers and VaporizersEnergy MetabolismKidney GlomerulusImmunohistochemistryTemperatureAllantoinPhotosynthesisBacteriaRandom AllocationGlutamate SynthaseAmmonium CompoundsAmyloid beta-Protein PrecursorAdministration, InhalationMicroscopy, Electron, ScanningIronMice, TransgenicSpecies SpecificityGenes, BacterialNutritional RequirementsRoot Nodules, PlantCarbon Dioxide