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The critical force F c is determined from the zero of the ground state eigenenergy E 0, (22). a At [Na+] = 0.110 M the critical force F c is 11.6 pN at 300 K (27 °C) and 11.0 pN at 320 K (47 °C). b At [Na+] = 0.200 M the critical force F c is 15.0 pN at 300 K (27 °C) and 14.3 pN at 320 K (47 °C)
