Energy dissipation in adhesive and cohesive fracture toughness. Energy dissipation in adhesive and cohesive fracture toughness. (A) Adhesive (red circles) and cohesive (blue inverted triangles) fracture toughness data plotted using Eq. 2. (B) Cohesive strength of non-CF HBE mucus before (red circles) and after (blue inverted triangles) treatment with DTT (20 mM), over a range of peeling velocities fitted to Eq. 2. Brian Button et al. PNAS 2018;115:49:12501-12506 ©2018 by National Academy of Sciences