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Non-linear dielectric properties of biological materials

It is proposed to report on the progress made since my 1974 Whitehead Memorial Lecture on the extraordinary dielectric properties of biological materials. It will be remembered that from very general considerations it can be concluded that large polarizable molecules are expected to possess metastable states with very high electric dipole moment. The conditions to which this transition is subjected will be presented. Already in 1972 it had been suggested that this property might be relevant for an understanding of the gating mechanism in nerve membranes. Some further progress in this direction has been made.