Results 221 to 230 of about 35,404 (265)

Modelling the interrelations between calcium oscillations and ER membrane potential oscillations

Biophysical Chemistry, 1997
A refined electrochemical model accounting for intracellular calcium oscillations and their interrelations with oscillations of the potential difference across the membrane of the endoplasmic reticulum (ER) or other intracellular calcium stores is established.
M, Marhl, S, Schuster, M, Brumen, R, Heinrich   +3 more
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Intrinsic membrane potential oscillations in hippocampal neurons in vitro

Brain Research, 1991
Membrane potential oscillations (MPOs) of 2-10 Hz and up to 6 mV were found in almost all stable hippocampal CA1 and CA3 neurons in the in vitro slice preparation. MPOs were prominent for pyramidal cells but less pronounced in putative interneurons.
L W, Leung, C Y, Yim
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Self-sustained oscillations of electric potential in a model membrane

Biophysical Chemistry, 1986
A model membrane constructed from a Millipore filter, whose pores are filled with dioleyl phosphate molecules, exhibits a self-oscillation of the electric potential with a period of about a few seconds in the presence of a salt-concentration difference, pressure difference and/or electric current across the filter.
K, Toko, M, Tsukiji, S, Iiyama, K, Yamafuji   +3 more
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A membrane potential model with counterions for cytosolic calcium oscillations

Cell Calcium, 1994
An initial model has been proposed to describe a mechanism for cytosolic calcium oscillations [Jafri MS. Vajda S. Pasik P. Gillo B. (1992) A membrane model for cytosolic calcium oscillations: a study using Xenopus oocytes. Biophys. J., 63, 235-246]. In this paper we extend our original model to include the effects of counterion movement into the ER in ...
M S, Jafri, B, Gillo
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Dynamic Oscillations in the Membrane Potential of Pancreatic Islet Cells

Journal of Experimental Biology, 1979
ABSTRACT Glucose and other metabolizable sugars which elicit insulin release from the β-cell of the pancreatic islet induce repetitive oscillations in the β-cell transmembrane potential. Upon each phasic depolarization are superimposed rapid fluctuations in potential, i.e.
E K, Matthews, M D, O'Connor
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Oscillations of Membrane Potential across a Polypeptide Membrane, Induced by an Electrical Current

Biochemical and Biophysical Research Communications, 1998
Oscillation of membrane potential across a tri-block copolypeptide membrane composed of (Glu)x-(Leu)y-(Glu)x (x = 0.18 and y = 0.64) was observed under an electrical current, when the membrane was placed between equimolar aqueous salt solutions. The amplitude of the oscillation was influenced by the type of cation and anion in the external salt ...
N, Minoura, M, Higuchi, T, Ohmori, T, Yamaguchi   +3 more
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Membrane Potential Oscillations In Molluscan “Burster” Neurones

Journal of Experimental Biology, 1979
ABSTRACT Membrane potential oscillations can be induced in molluscan neurones under a variety of artificial conditions. In the so-called ‘burster’ neurones oscillations are generated even in isolated cells. A likely mechanism for ‘bursting’ involves the following ionic currents: A transient inward current carried by Na ...
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Oscillation of membrane potential in ion–complex membranes of DNA and hexamethylenediamine

Journal of the Chemical Society, Faraday Transactions, 1998
Ion–complex membranes of DNA and hexamethylenediamine generated oscillations in the membrane potential under a concentration gradient of several salts at frequencies between 0 and 5 Hz at pH 7.0. These rhythmic and synchronized oscillations can be regarded as a simple model of non-linear phenomena observed in organs and cells.
Akon Higuchi, Takahiro Ichi, Tsutomu Ebana, Mariko Hara   +3 more
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Self-Sustained Oscillations of Membrane Potential in DOPH-Millipore Membranes

Journal of the Physical Society of Japan, 1982
Self-sustained oscillations of membrane potential in an artificial model membrane, where dioleyl phosphate (DOPH) is infiltrated into pores of a Millipore filter, are investigated both experimentally and theoretically. Spike-like self-oscillations with an extremely long period of about one hour were observed for membranes with large adsorbed amounts of
Kiyoshi Toko, Kouichi Ryu, Shu Ezaki, Kaoru Yamafuji   +3 more
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Oscillations of Membrane Current or Membrane Potential and Voltammetric Elucidation of Their Mechanisms

Bulletin of the Chemical Society of Japan, 1997
Abstract Novel oscillations of membrane current or membrane potential were observed when the transfer of Na+ from one aqueous solution (W1) containing 0.1 M NaCl to another (W2) in the absence of Na+ through a liquid membrane (LM) containing dilute Na+ was forced by an applied membrane potential or membrane current, respectively.
Kohji Maeda, Wataru Hyogo, Shuzo Nagami, Sorin Kihara   +3 more
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