The Journal of General Physiology
Scientifica: Experts in Electrophysiology
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The Journal of General Physiology, Vol 13, 223-229, Copyright © 1929 by The Rockefeller University Press

ARTICLE

PROTOPLASMIC POTENTIALS IN HALICYSTIS

L. R. Blinks 1

1 From the Laboratories of The Rockefeller Institute for Medical Research

The cells of Halicystis impaled on capillaries reach a steady P.D. of 60 to 80 millivolts across the protoplasm from sap to sea water. The outer surface of the protoplasm is positive in the electrometer to the inner surface. The P.D. is reduced by contact with sap and balanced NaCl-CaCl2 mixtures; it is abolished completely in solutions of NaCl, CaCl2, KCl, MgSO4, and MgCl2. There is prompt recovery of P.D. in sea water after these exposures.

Accepted on September 14, 1929


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