Fig 6. Variation in degradation for solvent cast films of different commercial chitosan samples with different DDAs, as measured by weight loss from original (%); (a) 72; (b) 73; (c) 75; (d) 77; (e) 79 and (f) 85% DDA; (37°C, pH 7.4, 120 rpm; white circle: abiotic degradation in PBS and black circle: biotic degradation in PBS with 2% w/v lysozyme).
