Table 3.

Growth characteristics of strain C13 during batch growth at 40°C in HEPES-buffered FWM at pH 7.5 with initial ammonia concentration of 2 mM and determined on the basis of changes in concentrations of nitrite, cells and amoA genes. Means and standard errors are calculated from triplicate cultures.

Basis for calculations	μ max (h−1)	Specific cell activity (fmol NO2− cell−1 h−1)	Cell yield (cells μM−1 NH3)
Nitrite concentration	0.0237 (s.e. 0.0001)
Cell concentration	0.0248 (s.e. 0.0011)	2.02 (s.e. 0.19)	7.60 × 103 (s.e. 0.19 × 103)
amoA concentration	0.0239 (s.e. 0.0004)	0.58 (s.e. 0.17)	1.29 × 105 (s.e. 0.097 × 105)