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Appl Microbiol. 1975 Feb;29(2):265-8.

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.

PMID:
1090252
PMCID:
PMC186956
[Indexed for MEDLINE]
Free PMC Article

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