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. 2016 Feb 23;7:167. doi: 10.3389/fmicb.2016.00167

Table 1.

T. paralvinellae and P. furiosus kinetic parameters.

Kinetic parameter Media type p-value
0.5% maltose 0.5% tryptone 0.5% maltose + 0.05% tryptone 0.5% maltose + 10 mM acetate 0.5% maltose (pH 5)
T. paralvinellae
μ (h−1) 0.45 ± 0.11 0.35 ± 0.21 0.34 ± 0.13 0.32 ± 0.08 0.35 ± 0.11 NS
cellmax (× 107, ml−1) 13a 6b 13a 8b 5b *
Yp∕x (fmol H2 cell−1) 13 ± 3a 16 ± 5a 32 ± 7b 10 ± 1a 32 ± 8b ***
q (fmol H2 cell−1 h−1) 8 ± 3a 8 ± 3a 16 ± 5b 5 ± 1a 16 ± 4b ***
rmax (mmol H2 l−1 h−1) 1.1 ± 0.5a,b 0.5 ± 0.3a 2.0 ± 0.8b 0.4 ± 0.1a 0.8 ± 0.4a **
P. furiosus
μ (h−1) 0.43 ± 0.08 0.31 ± 0.22 0.49 ± 0.25 0.54 ± 0.13 0.39 ± 0.10 NS
cellmax (× 107, ml−1) 10a,b 6b 19a 4b 8b **
Yp∕x (fmol H2 cell−1) 11 ± 2a 42 ± 11a,b 17 ± 3a,b 46 ± 29b 17 ± 8a,b **
q (fmol H2 cell−1 h−1) 7 ± 1a 19 ± 6a,b 12 ± 4a,b 36 ± 24b 10 ± 5a,b **
rmax (mmol H2 l−1 h−1) 0.7 ± 0.2a 1.1 ± 0.3a 2.3 ± 0.8b 1.4 ± 0.8a,b 0.7 ± 0.3a *

The kinetic parameters are based on the best-fit line through the data (±95% confidence interval). μ, specific growth rate; cellmax, maximum cell concentration; Yp∕x, product yield coefficient per cell; q, specific H2 production rate; rmax, maximum H2 production rate. p-values calculated from one-way ANOVA test comparing results across treatments.

*

p < 0.05,

**

p < 0.01, and

***

p < 0.001.

a, b

Tukey post-hoc test indicates groups whose members are not significantly different. NS, no significance.