Table 1.
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.
Tukey post-hoc test indicates groups whose members are not significantly different. NS, no significance.