title: [Preliminary study of characteristics of a special Nitrosomonas].
abstract: A special obligately-autotrophic Nitrosomonas was isolated from high temperature and hypersaline drainage water obtained off a wastewater treatment plant. It was Gram-negative, nonsporulating, ellipsoidal or short-rod shaped bacterium that singly arranged or arranged in a circle or in a row. Cells were 0.7 to 0.9 microm wide and 1.2 to 1.98 microm long. Electron-microscopic scanning of these cells indicated that they were wrapped by unknown fluff-like matter. They oxidized ammonium to nitrite and caused the removal of nitrogen from the system. But the decrease of NH4+ -N did not accord with the increase of NO2 - -N and NO3- -N was almost not detected. After 12 d of cultivation at 50 degrees C, about 10% of the NH4+ -N was converted to NO2- -N, 15% remained as NH4+ -N, and the other 75% was removed from the system, including 17% of NH4+ -N volatilized.
authors.affiliation: College of Life Science, Sichuan University, Chengdu 610064, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Daping
authors.initials: D
authors.lastname: Li
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Wang
authors.forename: Shigui
authors.initials: S
authors.lastname: Liu
mesh_terms: D009573:Nitrites / Q000378:metabolism; D009606:Nitrosomonas / Q000302:isolation & purification* / Q000378:metabolism / Q000648:ultrastructure; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D013696:Temperature; D014865:Waste Disposal, Fluid; D014871:Water Microbiology
chemical_list: D009573:Nitrites; D000644:Quaternary Ammonium Compounds