caa a22 4500 46582627X CHVBK 20180323112150.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00691723 doi (NATIONALLICENCE)springer-10.1007/BF00691723 Ionic movements across the chorion in newly shed salmon eggs ( Salmo salar L.) [Elektronische Daten] [F. Eddy, M. Ward, C. Talbot, D. Primmett] Summary: Sodium and chloride exchange and trans-chorion potentials were investigated in newly shed eggs from Atlantic salmon. Exposure of eggs to pH 3.5 caused the non-labile sodium fraction at pH 7.0 to become labile and lost from the egg. Chloride fluxes appear unaffected by the pH of the external medium. Trans-chorion potential was inside negative (about −100 mV) in dilute media (10−5 mol·l−1 NaCl or KCl) and immediately decreased as external cation concentration was increased, by about 46 mV/decade change in cation concentration, reaching about 0 mV in 10−2 mol·l−1 cation. Return to dilute cation solutions resulted in a slow increase in potential (repolarisation) and the time course of these potential changes was paralleled by the rate of sodium efflux, although chloride efflux was very rapid. After exposure to acid conditions repolarisation of the egg on return to dilute cation concentrations was preceeded by a phase when the pvp became inside positive. The results are discussed in terms of chorion structure, anionic charge on the perivitelline molecules and unstirred layers within the chorion. Springer-Verlag, 1990 Perivitelline potential nationallicence Salmon eggs nationallicence Donnan effect nationallicence pvp : perivitelline potential nationallicence Eddy F. Department of Biological Sciences, University of Dundee, DD1 4HN, Dundee, UK aut Ward M. Department of Physiology, University of Dundee, Dundee, UK aut Talbot C. Freshwater Fisheries Laboratory, PH16 5LB, Pitlochry, Perthshire aut Primmett D. Department of Biological Sciences, University of Dundee, DD1 4HN, Dundee, UK aut Journal of Comparative Physiology B Springer-Verlag 159/6(1990-11-01), 771-776 0174-1578 159:6<771 1990 159 360 https://doi.org/10.1007/BF00691723 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00691723 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eddy F. Department of Biological Sciences, University of Dundee, DD1 4HN, Dundee, UK aut NATIONALLICENCE 700 1- Ward M. Department of Physiology, University of Dundee, Dundee, UK aut NATIONALLICENCE 700 1- Talbot C. Freshwater Fisheries Laboratory, PH16 5LB, Pitlochry, Perthshire aut NATIONALLICENCE 700 1- Primmett D. Department of Biological Sciences, University of Dundee, DD1 4HN, Dundee, UK aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer-Verlag 159/6(1990-11-01), 771-776 0174-1578 159:6<771 1990 159 360 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer