title: [The isotope method for the determination of the nitrogen-fixing ability of oligonitrophilous bacteria].
mesh_terms: D013058:Mass Spectrometry; D009576:Nitrobacter / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D009587:Nitrogen Isotopes; D013057:Spectrum Analysis
chemical_list: D009587:Nitrogen Isotopes; D009584:Nitrogen
vernacular_title: Dosvid vykorystannia izotopnoho metodu dlia vyvchennia azotfiksuiuchoï zdatnosti olihonitrofil'nykh bakteriĭ.