Results 301 to 310 of about 12,231,174 (337)

Membrane potential in charged porous membranes

Journal of Membrane Science, 1999
Abstract For charged porous membranes, the separation efficiency to charged particles and ions is affected by the electrical properties of the membrane surface. Such properties are most commonly quantified in terms of zeta-potential. In this paper, it is shown that the zeta-potential can be calculated numerically from the membrane potential.
B Aoubiza, Anthony Szymczyk, Patrick Fievet, J. Pagetti   +3 more
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[66] Membrane potential and reconstitution

1979
Publisher Summary The enzymological approach to the study of membranous proteins whose function is to generate membrane potential requires that the three problems to be solved: (1) isolation of the membrane-potential-generating protein, (2) incorporation of the isolated components into artificial phospholipid membrane, and (3) measurement of the ...
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Membrane potentials of charged cellulosic membranes

Journal of Membrane Science, 1984
We have determined potentials of carboxymethyl cellulose (CMC) and carboxyethyl cellulose (CEC) membranes with various degrees of substitution in solutions of LiCl, NaCl, KCl and CsCl at 25°C. The ionic mobility ratio, D+/D-, in these membranes showed the same dependence on the Stokes radius of the cation as that in the bulk aqueous solution. D+/D- and
Han-jin Lim, Toshiro Iijima, Yuzi Kimura
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Alteration of Membrane Potential

2003
We began our investigation of cellular electrical properties, in the last chapter, with a look at the resting membrane potential, which is the ultimate power source for nervous system signaling. We will begin this chapter with a discussion of ways in which the membrane potential is altered so that signaling occurs over short distances (i.e., 10s or ...
L. Donald Partridge, Lloyd D. Partridge
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Membrane Potentials in Photosynthesis [PDF]

Annual Review of Plant Physiology, 1977
INTRODUCTION 504 DIGRESSION ON ELECTROCHEMISTRY ..... ..... 504 METHODS 507 Electrochromism in Chloroplasts ......... ... ... ...... ..... ... ..... 507 Kinetic evidence ........ ...... .... ..... ..... 508 Spectroscopic evidence ...... ... .... ... ... ........ ..... 508 Evidence [rom artificially induced diffUSion potentials
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Equations for the membrane potential

Biophysics, 2009
The problem of an electric signal propagating over a thin layer modeling the cell membrane is considered in the electrostatic approximation. At both sides of the membrane there are bulk conductors with different properties. Various types of boundary conditions are examined.
S. A. Regirer, N. V. Kopylova
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Membrane potentials of thin nitrocellulose membranes

Journal of Applied Polymer Science, 1967
AbstractThe membrane potentials of thin (300–1300 A.) nitrocellulose (Parlodion) membranes have been investigated. Measurements were made in a Lucite cell by use of calomel electrodes with 0.05N KCl and 0.1N KCl. Variables having an influence on membrane structure, such as solvent polarity, temperature, and thickness, have been studied in relation to ...
Paul H. Carnell, Daniel E. McGunegle
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DC Potentials of the Membranous Labyrinth

American Journal of Physiology-Legacy Content, 1958
The endolymphatic DC potentials were measured in the utricle, saccule and cochlear duct of the membranous labyrinth of the guinea pig and compared with potassium analyses of the endolymph. The average utricular potential was found to be +4 mv, the saccular potential +1 mv, and the cochlear potential +65 mv.
Carl F. Gessert, Bruce H. Deatherage, Hallowell Davis, Catherine A. Smith   +3 more
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Membrane Potential Imaging

1991
There are two populations of scientists who have, respectively, employed two different classes of voltage-sensitive dyes. The larger group, of cell biologists, has primarily used slow (response time > s) redistribution dyes for measurements of membrane potential changes in suspensions of cells or energytransducing organelles (Freedman and Laris, 1981 ...
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Generation of the Membrane Potential

2003
Knowledge of the existence of bioelectric potentials must certainly go back to the first unfortunate encounters that people had with electric fish, but an understanding of the origin of these potentials awaited the advances in physical chemistry that occurred near the end of the 19th century.
L. Donald Partridge, Lloyd D. Partridge
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