铵态氮ammonium nitrogen
氮肥nitrogen fertilizer
挥发性盐基总氮total volatile basic nitrogen
固氮Nitrogen fixation
炭黑氮吸附表面积carbon black nitrogen adsorption surface area【橡胶】
生物固氮酌biological nitrogen fixation
液氮双相传输制冷器liquid nitrogen two-phase flow refrigerator【制冷】
【化】 硝态氮; 硝酸盐中的氮nitric nitrogen