Fig. 8From: Production of surfactant-stable keratinase from Bacillus cereus YQ15 and its application as detergent additiveWashing performance of B. cereus keratinase. a, the stain treated with 100Â mL tap water; b, the stain treated with 100Â mL detergent solution (0.7Â mg/mL) for 20Â min; c, the stain treated with 100Â mL of crude enzyme solution (400 U/mL); d, the stain treated with 100Â mL detergent and enzyme solution (0.7Â mg/mL inactive commercial detergent combining with 200 U/mL keratinase) for 20Â minBack to article page