Table 3.

Effect of increasing O2 concentrations on the glucose (5 mM)-dependent product profiles of RD-1a

Initial O2 concn (%)O2 consumed (mmol liter of culture fluid−1)Products (mM)Acetate/glucose ratioRecovery of reducing equivalents (%)b
AcetateEthanolLactateH2
AnoxicNAc12.10.800.022.4289
0.30.2911.60.800.022.3285 (86)
2.02.117.52.60.30.541.5081 (88)
2.82.226.42.90.30.521.2875 (83)
3.72.176.81.50.40.531.3666 (73)
  • a Glucose was totally consumed in all cultures. Values were corrected with control values obtained from cultures lacking glucose and are means of three replicates. The standard deviations were less than 10%.

  • b Values in parentheses take into account the amount of reductant that was theoretically required for the reduction of O2.

  • c NA, not applicable.