Fig. 3.

Influence of soda concentration on anaerobic growth (a, b) and on activity of washed cells (c) in strain AGD 3 at pH 10 with acetate as the electron donor. a Anaerobic growth with nitrate: closed circles growth rate, open circles and triangles formation of nitrite and N₂O, respectively. b Influence of soda on aerobic (open circles), and anaerobic growth with nitrite (closed circles) and N₂O (triangles). c Influence of soda on activity of reduction of nitrate (open circles), nitrite (closed circles) and N₂O (triangles) by washed cells, grown anaerobically with nitrate at 3 M Na⁺