Fig. 9From: Statistical optimization of chemical modification of chitosan-magnetic nano-particles beads to promote Bacillus subtilis MK1 α-amylase immobilization and its applicationFT-IR of activated beads (Ch-MNP/PEI/GA) (A), immobilized enzyme (Ch-MNP/PEI/GA/Enz) (B) and free enzyme (C)Back to article page