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Light-Induced Conductance Changes in Rod Outer Segments

  • G. Falk
  • P. Fatt
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 24)

Abstract

Alternating current measurements have been made on packed suspensions of rod outer segments. Since it is suspected that any changes that occur in the passive electrical properties of this experimental material will have their origin in conductive (i.e. dissipative) elements, attention has been directed to the detection of changes in the real part of admittance (Δ G) representing the change in amplitude of current through the material inphase with an applied sinusoidal voltage of unit amplitude). Owing to the presence of capacitative elements arising from membranes, Δ G will, in general, vary with the frequency of the applied voltage. Information can thus be derived about the position, relative to known structural features, of conductive elements that change on illumination. In particular, an increase of Δ G with frequency may be an indication that one is probing beyond the surface membrane to observe changes taking place in the interior of rod outer segments.

Keywords

Conductivity Cell Carrier Wave Disc Membrane Longitudinal Conductance Platinum Black 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Bibliography

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Copyright information

© Plenum Press, New York 1972

Authors and Affiliations

  • G. Falk
    • 1
  • P. Fatt
    • 1
  1. 1.Biophysics DepartmentUniversity College LondonLondonEngland

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