Nitrogen CycleNitrogen FixationNitrogen CompoundsNitrificationDenitrificationNitrogenCell CyclePlanctomycetalesQuaternary Ammonium CompoundsNitrogen IsotopesCrenarchaeotaArchaeaAmmoniaFixation, OcularNitrite ReductasesFracture FixationNitratesSeawaterNitritesGenes, ArchaealBacteriaOceans and SeasEcosystemDNA, ArchaealSoil MicrobiologyNitrous OxideGeologic SedimentsSoilTissue FixationComplement Fixation TestsOxidation-ReductionPhylogenyClimate ChangeAgricultureBlood Urea NitrogenNitrogen DioxideTreesBone ScrewsMenstrual CycleBiodiversityOxidoreductasesMolecular Sequence DataReactive Nitrogen SpeciesBone PlatesExternal FixatorsRNA, Ribosomal, 16SFixativesGenome, BacterialCell Cycle ProteinsPII Nitrogen Regulatory ProteinsCarbonNitrogenaseNitrogen OxidesFracture Fixation, IntramedullarySequence Analysis, DNAOrthopedic Fixation DevicesSymbiosisInternal FixatorsBone WiresEstrous CycleCitric Acid CycleFertilizersAcetyleneBone NailsFracture HealingTime FactorsCarbon CycleGlutamate-Ammonia LigaseRoot Nodules, PlantFractures, ComminutedCarbon DioxideSaccadesFormaldehydeEye MovementsTibial FracturesUreaPhotosynthesisMutationBacterial Proteins