FIG. 3.
Effect of O2 on the glucose-derived product and growth profiles of RD-1. Data are the means of three replicates (± standard deviations). (A) ▾, O2 in cultures containing supplemental O2; ▿, O2 in cultures without supplemental O2; ●, optical density in cultures containing supplemental O2; ○, optical density in cultures without supplemental O2; ▪, H2 in cultures containing supplemental O2; □, H2 in cultures without supplemental O2. (B) ▪, glucose in cultures containing supplemental O2; □, glucose in cultures without supplemental O2; ●, acetate in cultures containing supplemental O2; ○, acetate in cultures without supplemental O2. Acetate values were corrected with control values from cultures lacking glucose. The small amounts of ethanol formed from 2 mM glucose could not be accurately quantitated.