Figure 4.
Stress as a function of PBS concentration and strain at (a) 0.01 and (b) 0.5 Hz for 0, 2 and 4% strain (1 and 3% strain are omitted for clarity). Stress increased with strain in all bathing conditions. In addition, a significant decrease in stress was found with increasing salt concentration in the toe region (ε ≤ 3%).