Fig. 2From: Effective biodegradation of chicken feather waste by co-cultivation of keratinase producing strainsCharacterization of three degradation systems. a Changes in pH of the degradation systems; b changes in cell density of the degradation systems; c changes in keratinase activity of the degradation systems; d changes in protease activity of the degradation systems. (B: B. licheniformis BBE11-1, S: S. maltophilia BBE11-1)Back to article page