Table 2. N₂O and NO₂ ⁻ production rates of N. viennensis at two different oxygen concentrations.

	21% oxygen	3% oxygen
Net NO2− production
μmol l−1 h−1	7.7±0.6	6.2±0.5
fmol cell−1 h−1	2.6±0.5	2.8±0.5
Net N2O production
nmol l−1 h−1	13.6±1.2	9.3±1.1
amol cell−1 h−1	4.6±0.6	4.2±0.1
Cell densitya
Cells × 109 l−1	2.9±1.0	2.2±0.7

Data represent average values of quadruplicate experiments with standard deviations.

^aMeasured by qPCR.