The electrical properties of the inner epidermis of the onion scale
Open Access
- 2 January 1932
- journal article
- research article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character
- Vol. 109 (764), 434-442
- https://doi.org/10.1098/rspb.1932.0004
Abstract
The inner epidermis of the onion scale is shown to resemble the dried collodion membrane in being relatively very impermeable for anions in dilute solutions of electrolytes and in retaining this impermeability for an indefinite period. For uni-univalent electrolytes the potential across the membrane tends with increasing conc. to a limit equal to the liquid junction potential (l.j.p.) in the absence of the membrane. For electrolytes containing a bi- or trivalent cation the potential falls with increasing conc. below the value of the l.j.p. and the membrane appears to be more permeable for anions than for cations. Additions of small amts. of bi- or trivalent cations to solutions of KC1 in contact with the membrane has a disproportionately large depressing effect on the potential.This publication has 2 references indexed in Scilit:
- The potential difference across the surface bounding the unfertilised egg of the brown troutProceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character, 1931
- STUDIES ON PERMEABILITY OF MEMBRANESThe Journal of general physiology, 1929