Download Electrical Double Layers in Biology by Shinpei Ohki, Hiroyuki Ohshima (auth.), Martin Blank (eds.) PDF

By Shinpei Ohki, Hiroyuki Ohshima (auth.), Martin Blank (eds.)

A variety of it appears unrelated phenomena in organic structures (e.g., biopolymer aggregation, cell-cell interactions, ion delivery throughout membranes) come up from the precise houses of charged surfaces. A sym­ posium entitled "Electrical Double Layers in Biology", which happened on the Toronto assembly of the Electrochemical Society, 12-17 may well 1985, fascinated with the typical positive factors of those phenomena. The papers provided at that symposium are amassed right here and so they illustrate ways that an less than­ status of electric double layers can elucidate an issue in Biology. An instance of this procedure should be visible from the paper I provided on ion shipping and excitation, the place the "unusual" ion flows in the course of nerve excitation are literally anticipated if one contains the results of electric double layers at membrane surfaces. moreover, the selectivity of the ion channels in those membranes should be higher understood in this foundation. different shows account for such observations because the adjustments in spacing among muscle proteins in the course of contraction, the interactions of purple cells to shape rouleaux, houses of algal mobile membranes, electrokinetic potentials in the course of blood circulation in arteries, and so forth. I belief that those papers will point out the price of electrochemistry within the learn of organic platforms, a space of analysis often referred to as Bioelectrochemistry, and may inspire biologists to exploit those principles while impending similar problems.

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Vaidhyanathan Department of Biophysical Sciences School of Medicine, State University of New York at Buffalo, Buffalo, New York, 14221 INTRODUCTION It is generally presumed, that if a plane plate is positively charged, its potential is positive and that if a plate contains an excess of negative charges, its potential is negative. One may assume that the distribution of positive and negative ions, near a surface with an excess of fixed negative charges, is similar to the schematic representation presented in Figure 1 a.

Thus, our basic postulates, which include io~-ion energy interaction contribution to chemical potential, require that the system parameters determine the electric potential profile and dielectric profile. If one knows or specifies the electric potential profile together with the concentrations of ions in aqueous solution, one should be able to sp·acify the Taylor coefficients of dielectric profile. The results of such computation, assuming that the electric potential decreases monotonically from the value of 100 mV at x = 0, is presented in Figure 3.

3l. 3. Guggenheim, 'Statistical Thermodynamics' Cambridge University Press, New York, (1939). 4. Overbeek, 'Theory of Stability of Lyophobic Colloids' Elsevier Publishing"Co. New York (1945) p. 31. 5. Lakshminarayaniah, 'Transport Phenomena in Membranes' Academic Press, New York, (1969). 6. Nagasawa, 'Polyelectrolyte Solutions' Academic Press, New York, (1961). 7. Rosen editor, Academic Press, New York, (1971) vol. 1. 8. Fishman, in 'Structure and Function in Excitable Cells' edited by Chang, Tasaki, Adelman and Leuchtag, Plenum Publishing Copn.

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