FIG. 3.

Variation of cell density measured as D₆₄₀ (A), pH (B), and dye concentration measured as A₄₇₀ (C) in NDM preadjusted to pH 3.2 containing 0.2 mM dye II under different conditions: anoxic conditions (▵), air-flushed cultures (□), and normal incubation at 120 rpm (◊) (see text for details). The initial cell density was ≈3 D units.