FIG. 3.

MICs of nisin (A) and residual concentrations of nisin (B) for L. monocytogenes wild-type cells grown at 4°C in the presence of air (black bars) or 100% CO₂ atmosphere (open bars) when nisin (2.5 μg/ml) was added to the broth at time zero. Vertical bars represent the means and standard deviations from two independent experiments.