Fig. 4From: Understanding the effects of different residual lignin fractions in acid-pretreated bamboo residues on its enzymatic digestibilityEffect of addition of different lignins extracted from acid-pretreated bamboo residues on the enzymatic hydrolysis of Avicel: a 20% surface lignin, b 40% surface lignin and c 40% milled wood lignin. The relationship between the enzymatic digestibility of Avicel and d contact angle and e molecular weightBack to article page