fixation (nĪʹtrə-jən fĭk-sĀʹshən) noun. 1. The conversion of atmospheric nitrogen into compounds, such as ammonia, by natural agencies or various industrial processes, pengikatan nitrogen. 2. The conversion by certain soil microorganisms, such as rhizobia, of atmospheric nitrogen into compounds that plants and other organisms can assimilate, pengikatan nitrogen
nitrogen metabolism metabolisme nitrogen
nitrogen (nĪʹtrə-jən) noun. Symbol NA nonmetallic element that constitutes nearly four fifths of the air by volume, occurring as a colorless, odorless, almost inert diatomic gas, N2, in various minerals and in all proteins and used in a wide variety of important manufactures, including ammonia, nitric acid, TNT, and fertilizers. Atomic number 7; atomic weight 14.0067; melting point -209.86°C; boiling point -195.8°C; valence 3, 5, nitrogen.
(nī-trŏjʹə-nās´, -nāz´, nīʹtrə-jə-) noun. An enzyme of nitrogen-fixing bacteria that activates the conversion of nitrogen to ammonia, nitrogenase