Results 41 to 50 of about 401,972 (377)
Feshbach resonances in potassium Bose-Bose mixtures [PDF]
Phys. Rev. A 98, 062712 (2018), 2018 We present a detailed study of the scattering properties of ultracold mixtures of bosonic potassium atoms. We locate 20 previously unobserved Feshbach resonances in isotopic 39K-41K mixtures. These are assigned to s-wave molecular channels by comparison to an asymptotic bound state model and coupled channels calculations. Additional Feshbach resonances
arxiv +1 more source
Monte Carlo study of gating and selection in potassium channels [PDF]
Physical Review E 84, 021920, 2011, 2011 The study of selection and gating in potassium channels is a very important issue in modern biology. Indeed such structures are known in all types of cells in all organisms where they play many important functional roles. The mechanism of gating and selection of ionic species is not clearly understood.
arxiv +1 more source
Lack of direct evidence for a functional role of voltage-operated calcium channels in juxtaglomerular cells [PDF]
, 1990 In this study we have examined the role of voltage-gated calcium channels in the regulation of calcium in juxtaglomerular cells. Using a combination of patch-clamp and single-cell calcium measurement we obtained evidence neither for voltage-operated ...
Chegini, S. +3 more
core +1 more source
Potassium channels as drugs targets in therapy of cardiovascular diseases: 25 years later [PDF]
Sanamed, 2013 Potassium channels are the most variable ion channel group. They participate in numerous cardiovascular functions, for example regulation of vascular tone, maintenance of resting cardiac membrane potential and excitability of cardiac conduction tissue ...
Protić Dragana +2 more
doaj +2 more sources
The role of axonal voltage-gated potassium channels in tDCS
Brain Stimulation, 2022 Background: Transcranial direct current stimulation (tDCS) is a non-invasive sub-threshold stimulation, widely accepted for its amelioration of distinct neuropsychiatric disorders.
Sreerag Othayoth Vasu, Hanoch Kaphzan
doaj
Macrodipoles of potassium and chloride ion channels as revealed by electronic structure calculations [PDF]
Journal of Molecular Structure (Theochem) 950 (2010) 79-82, 2009 With the aid of quantum mechanical calculations we investigate the electronic structure of the full length (FL) potassium channel protein, FL-KcsA, in its closed conformation, and the electronic structure of the ClC chloride channel. The results indicate that both ion channels are strongly polarized towards the extracellular region with respect to the ...
arxiv +1 more source
Sodium-activated potassium channels shape peripheral auditory function and activity of the primary auditory neurons in mice [PDF]
, 2019 Potassium (K+) channels shape the response properties of neurons. Although enormous progress has been made to characterize K+ channels in the primary auditory neurons, the molecular identities of many of these channels and their contributions to hearing ...
Gratton, Michael Anne +11 more
core +5 more sources
Coulomb interaction rules timescales in potassium ion channel tunneling [PDF]
, 2018 Assuming that the selectivity filter of KcsA potassium ion channel may exhibit quantum coherence, we extend a previous model by Vaziri and Plenio (2010) to take into account Coulomb repulsion between potassium ions. We show that typical ion transit timescales are determined by this interaction, which imposes optimal input/output parameter ranges. Also,
arxiv +1 more source
Human sperm ion channel (dys)function:implications for fertilization [PDF]
, 2019 BACKGROUND: Intensive research on sperm ion channels has identified members of several ion channel families in both mouse and human sperm. Gene knock-out studies have unequivocally demonstrated the importance of the calcium and potassium conductances in ...
Barratt, Christopher L. R. +3 more
core +3 more sources
A Tridomain Model for Potassium Clearance in Optic Nerve of Necturus [PDF]
, 2020 The accumulation of potassium in the narrow space outside nerve cells is a classical subject of biophysics that has received much attention recently. It may be involved in potassium accumulation \textcolor{black}{including} spreading depression, perhaps migraine and some kinds of epilepsy, even (speculatively) learning.
arxiv +1 more source