Results 341 to 350 of about 12,112,951 (393)

cAMP-induced changes of apical membrane potentials of confluent H441 monolayers.

American Journal of Physiology - Lung cellular and Molecular Physiology, 2003
We recorded apical membrane potentials (Va) of H441 cells [a human lung cell line exhibiting both epithelial Na+ (ENaC) and CFTR-type channels] grown as confluent monolayers, using the microelectrode technique in current-clamp mode before, during, and ...
A. Lazrak, S. Matalon
semanticscholar   +1 more source

Effects of ethanol on cellular membrane potentials and contractility of isolated rat atrium.

American Journal of Physiology, 1962
The simultaneous effects of ethanol on the contractility and electrical characteristics of atrial cells were examined.
Alvaro L. Gimeno, Martha F. Gimeno, J. Webb   +2 more
semanticscholar   +1 more source

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
openaire   +2 more sources

Assessment of membrane potentials of mitochondrial populations in living cells.

Analytical Biochemistry, 2001
Mitochondrial membrane potentials (MMP) reflect the functional status of mitochondria within cells. Fluorescent probes to estimate these potentials within cells have been available for some time, but measurements of populations of mitochondria are not ...
H. Zhang, H. M. Huang, R. Carson, J. Mahmood, H. M. Thomas, G. Gibson   +5 more
semanticscholar   +1 more source

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
openaire   +2 more sources

[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 ...
openaire   +3 more sources

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
openaire   +3 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source