FIG. 2.

Mean cell dry weight yields of A. niger N402 following transfer of mycelia grown for 24 h in ACM (pH 4.0) to fresh ACM (pH 4.0) (•, control) and with 1.0 mM sorbic acid (○). Shake flasks of 250-ml capacity, containing 100 ml of medium, were incubated at 28°C with orbital shaking at 160 rpm. Vertical bars show SEM (n = 3) calculated from independent cultures. Results from ethanol controls were identical to those from water controls and are therefore not presented.