Fig. 6

Utilisation of caprolactam by A. citreus in presence of 6-ACA. The media contained either only caprolactam (10 g/l) or caprolactam supplemented with 6-ACA (5 g/l) and were inoculated with A. citreus. Open circle, open triangle: cfu in medium with either only caprolactam or caprolactam supplemented with 6-ACA respectively. Open square, open diamond: residual caprolactam in medium with either only caprolactam or in medium supplemented with both—caprolactam and 6-ACA respectively