Electric impedance of asterias eggs

Cole, Kenneth S., Cole, Robert H. (March 1936) Electric impedance of asterias eggs. J Gen Physiol., 19 (4). pp. 609-623.

URL: https://www.ncbi.nlm.nih.gov/pubmed/19872951
DOI: 10.1085/jgp.19.4.609


The alternating current resistance and capacity of suspensions of unfertilized eggs of Asterias forbesi have been measured at frequencies from one thousand to sixteen million cycles per second. The plasma membrane of the egg has a static capacity of 1.10microf/cm.(2) which is practically independent of frequency. The suspensions show a capacity dependent on frequency at low frequencies which may be attributable to surface conductance. The specific resistance of the cytoplasm is between 136 and 225 ohm cm. (4 to 7 times sea water), indicating a relatively high concentration of non-electrolytes. At frequencies above one million cycles there is definite evidence of another element of which the nucleus is presumably a part.

Item Type: Paper
Subjects: organism description > animal > mammal
CSHL Authors:
Communities: The Carnegie Institution Department of Genetics
Depositing User: Elizabeth Pessala
Date: 20 March 1936
Date Deposited: 19 Jan 2018 15:47
Last Modified: 24 Jul 2018 14:42
PMCID: PMC2141462
Related URLs:
URI: https://repository.cshl.edu/id/eprint/35884

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