ELECTRIC IMPEDANCE OF THE FROG EGG

Electrical impedance measurements were made upon unfertilized and fertilized eggs of the leopard frog, Rana pipiens, over a frequency range of 0.05 to 10 kc. Average values of 170 ohm cm.(2) were obtained for the plasma membrane resistance of the egg, 2.0 µf/cm.(2) for the plasma membrane capacity,...

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Detalles Bibliográficos
Autores principales: Cole, Kenneth S., Guttman, Rita M.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1942
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2142534/
https://www.ncbi.nlm.nih.gov/pubmed/19873312
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author Cole, Kenneth S.
Guttman, Rita M.
author_facet Cole, Kenneth S.
Guttman, Rita M.
author_sort Cole, Kenneth S.
collection PubMed
description Electrical impedance measurements were made upon unfertilized and fertilized eggs of the leopard frog, Rana pipiens, over a frequency range of 0.05 to 10 kc. Average values of 170 ohm cm.(2) were obtained for the plasma membrane resistance of the egg, 2.0 µf/cm.(2) for the plasma membrane capacity, 86° for the phase angle of the membrane, and 570 ohm cm. for the specific resistance of the interior. These values did not change upon fertilization. No spontaneous rhythmical impedance changes such as have been found by Hubbard and Rothschild in the trout egg were found in frog eggs.
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spelling pubmed-21425342008-04-23 ELECTRIC IMPEDANCE OF THE FROG EGG Cole, Kenneth S. Guttman, Rita M. J Gen Physiol Article Electrical impedance measurements were made upon unfertilized and fertilized eggs of the leopard frog, Rana pipiens, over a frequency range of 0.05 to 10 kc. Average values of 170 ohm cm.(2) were obtained for the plasma membrane resistance of the egg, 2.0 µf/cm.(2) for the plasma membrane capacity, 86° for the phase angle of the membrane, and 570 ohm cm. for the specific resistance of the interior. These values did not change upon fertilization. No spontaneous rhythmical impedance changes such as have been found by Hubbard and Rothschild in the trout egg were found in frog eggs. The Rockefeller University Press 1942-05-20 /pmc/articles/PMC2142534/ /pubmed/19873312 Text en Copyright © Copyright, 1942, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Cole, Kenneth S.
Guttman, Rita M.
ELECTRIC IMPEDANCE OF THE FROG EGG
title ELECTRIC IMPEDANCE OF THE FROG EGG
title_full ELECTRIC IMPEDANCE OF THE FROG EGG
title_fullStr ELECTRIC IMPEDANCE OF THE FROG EGG
title_full_unstemmed ELECTRIC IMPEDANCE OF THE FROG EGG
title_short ELECTRIC IMPEDANCE OF THE FROG EGG
title_sort electric impedance of the frog egg
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2142534/
https://www.ncbi.nlm.nih.gov/pubmed/19873312
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