Results 91 to 100 of about 12,112,951 (393)

A New Dimension Hidden in the Shadow of a Wall [PDF]

open access: yes, 2007
We propose a new way to hide the fifth dimension, and to modify gravity in the far infra-red. A gravitating tensional membrane in five dimensions folds the transverse space into a truncated cone, stoppered by the membrane.
Aghababaie   +31 more
core   +4 more sources

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

open access: yesFEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang   +2 more
wiley   +1 more source

Insight into the Mode of Action of Celangulin V on the Transmembrane Potential of Midgut Cells in Lepidopteran Larvae

open access: yesToxins, 2017
Celangulin V (CV) is the main insecticidal constituent of Celastrus angulatus. The V-ATPase H subunit of the midgut cells of lepidopteran larvae is the putative target protein of CV.
Yingying Wang   +4 more
doaj   +1 more source

Fluctuation spectra of free and supported membrane pairs

open access: yes, 2006
Fluctuation spectra of fluid compound membrane systems are calculated. The systems addressed contain two (or more) almost parallel membranes that are connected by harmonic tethers or by a continuous, harmonic confining potential.
Merath, Rolf-Juergen, Seifert, Udo
core   +1 more source

Modeled channel distributions explain extracellular recordings from cultured neurons sealed to microelectrodes [PDF]

open access: yes, 2002
Amplitudes and shapes of extracellular recordings from single neurons cultured on a substrate embedded microelectrode depend not only on the volume conducting properties of the neuron-electrode interface, but might also depend on the distribution of ...
Buitenweg, Jan Reinoud   +2 more
core   +3 more sources

A stepwise emergence of evolution in the RNA world

open access: yesFEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Menthol Modulates Pacemaker Potentials through TRPA1 Channels in Cultured Interstitial Cells of Cajal from Murine Small Intestine

open access: yesCellular Physiology and Biochemistry, 2016
Background/Aims: ICCs are the pacemaker cells responsible for slow waves in gastrointestinal (GI) smooth muscle, and generate periodic pacemaker potentials in current-clamp mode.
Hyun Jung Kim   +5 more
doaj   +1 more source

Simultaneous two-photon imaging of action potentials and subthreshold inputs in vivo

open access: yesNature Communications, 2021
The authors present a geneticallyencoded voltage indicator to specifically measure subthreshold membrane potentials. They combine two-photon imaging of voltage and calcium to map epileptic seizures progression through cortical circuits.
Yuki Bando, Michael Wenzel, Rafael Yuste
doaj   +1 more source

Single-channel recordings from cultured human retinal pigment epithelial cells. [PDF]

open access: yes, 1988
We have applied patch-clamp techniques to on-cell and excised-membrane patches from human retinal pigment epithelial cells in tissue culture. Single-channel currents from at least four ion channel types were observed: three or more potassium-selective ...
Fain, GL, Fox, JA, Pfeffer, BA
core  

Similarities between action potentials and acoustic pulses in a van der Waals fluid [PDF]

open access: yes, 2018
An action potential is typically described as a purely electrical change that propagates along the membrane of excitable cells. However, recent experiments have demonstrated that non-linear acoustic pulses that propagate along lipid interfaces and ...
Mussel, Matan, Schneider, Matthias F.
core   +3 more sources

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