FIG. 4.

Continuous biotransformation determined by using 3-day-old Z. mobilis biofilms in the presence of 10 mM benzaldehyde and 5 g liter⁻¹ glucose (27.8 mM) with a constant flow rate of 0.15 ml min⁻¹ at 30°C. Benzaldehyde was added at time zero. The error bars indicate the sample standard deviations of results from independent reactors (n = 3). OD 600, optical density at 600 nm.