By P. Meares (auth.), Privat-Dozent Dr. Ulrich Zimmermann, Professor Dr. Jack Dainty (eds.)
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The reflection coefficient of NaCI across the sandwich membrane was determined by the change of salt in the outer compartments by active transport. uNaC I decreases with increasing salt concentration, thus the active salt flow is further increased for it is proportional to (1 - UNaCI). 10 CNaCI 1M) Fig. 7 Active EMF relative to chemical flow versus salt concentration. 146 Ml. From this we learn that the coupled. active transport of a salt and an active EMF are not necessarily D. , Biophys. J. , Nonequilibrium Thermodynamics in Biophysics.
Phil. Trans. Roy. Soc. Lond. B 237,37-72 (1952) On the Problem of Nonstationary Ion Fluxes H. Schonert A. Introduction The Nernst-Planck equations describe the flux of ions in solutions which exhibit gradients of chemical and electrical potential. They are well known to electrochemists and also to those who study the movement of ions in exchange resins, in membranes and in some other electrolytic systems. These equations have been useful in successfully explaining a variety of phenomena. Yet we could not find in the pertinent literature solutions of these equations dealing explicitly with time-dependent processes (except LONGSWORTH, 1943; KOBOTAKE and FUJITA, 1964).
See text. 76 The difference between the calculated and the experimentally determined value of the ratio (E/Ph ,1T can be rational ized by assum ing that only a fraction of the analytically determined counterions is displaced by the volume flow (TOYOSHIMA and NOZAKI, 1969; FRANCK, 1963). One possible reason for such a behaviour may be related to the structure of the membrane used in this investigation. It has been reported (KOSCHEL and SCHLOGL, 1957; SCHLOGL and SCHURICH, 1961) that this type of membrane is homogeneous for dimensions large compared with the wave lenght of visible light but is inhomogeneous in smaller dimensions.
Membrane Transport in Plants by P. Meares (auth.), Privat-Dozent Dr. Ulrich Zimmermann, Professor Dr. Jack Dainty (eds.)