title: Length of incubation for enumerating nitrifying bacteria present in various environments.
abstract: The effect of incubation time on most-probable-number estimates of autotrophic nitrifying bacteria was investigated by using waters, rooted aquatic plants, sediments, and slimes as inoculum sources. Maximum most probable numbers of the NH4+-oxidizing group were attained in 20 to 55 days (median, 25). Estimates of NO2-oxidizers were highest at termination (103 to 113) days.
mesh_terms: D000641:Ammonia / Q000378:metabolism; D001419:Bacteria / Q000302:isolation & purification* / Q000378:metabolism; D001431:Bacteriological Techniques / Q000592:standards*; D002452:Cell Count; D009573:Nitrites / Q000378:metabolism; D010084:Oxidation-Reduction; D010944:Plants / Q000382:microbiology*; D012722:Sewage; D012988:Soil Microbiology; D013997:Time Factors; D014871:Water Microbiology
chemical_list: D009573:Nitrites; D012722:Sewage; D000641:Ammonia