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The characteristic time of the open channel noise in both basic (pH 8) and acidic (pH 3.9) 1 M KCl solutions as functions of the applied voltage. Even though the characteristic times of these two process differ by an order of magnitude (0.06 ÷ 0.2 ms at pH 8 and 1.5 ÷ 2.5 ms at pH 3.9), both curves show similar voltage asymmetry, giving 70% (pH 8) and 40% (pH 3.9) higher values at −200 mV than at 200 mV.
