| pH 7 | pH 6 | ||
---|---|---|---|---|
N2sparging ( Case I) | No sparging ( Case II) | N2sparging ( Case III) | No sparging ( Case IV) | |
ATP (μmoles/g biomass) |  |  |  |  |
  Exponential phase | 0.097 ± 0.005 | 0.117 ± 0.003 | 0.046 ± 0.003 | 0.043 ± 0.003 |
  Stationary phase | 0.254 ± 0.025 | 0.199 ± 0.017 | 0.029 ± 0.002 | 0.030 ± 0.002 |
NADH (μmoles/g biomass) |  |  |  |  |
  Exponential phase | 0.019 ± 0.004 | 0.021 ± 0.005 | 0.007 ± 0.002 | 0.011 ± 0.002 |
  Stationary phase | 0.015 ± 0.003 | 0.025 ± 0.003 | 0.010 ± 0.002 | 0.015 ± 0.002 |
NAD+ (μmoles/g biomass) |  |  |  |  |
  Exponential phase | 0.239 ± 0.011 | 0.335 ± 0.032 | 0.231 ± 0.002 | 0.271 ± 0.001 |
  Stationary phase | 0.201 ± 0.015 | 0.205 ± 0.038 | 0.005 ± 0.001 | 0.010 ± 0.001 |
NADH/NAD+ (mol/mol) | Â | Â | Â | Â |
  Exponential phase | 0.08 ± 0.02 | 0.06 ± 0.02 | 0.03 ± 0.01 | 0.04 ± 0.01 |
  Stationary phase | 0.07 ± 0.01 | 0.13 ± 0.01 | 1.77 ± 0.23 | 1.56 ± 0.39 |