The role of pH in determining the electrical characteristics of the membranes of O. australis was investigated. Voltage-current characteristics were obtained with external solutions of pH 4·5-9, O. The chord resistance to hyperpolarizing currents decreased as the external pH was increased. For large hyperpolarizations (f1E < -170 m V) this effect was much greater than for small hyperpolarizations (f1E = -25 mY).
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HGL Coster (1969) studied this question.