Results 11 to 20 of about 1,866,304 (175)
Dynamic ion-ion and water-ion interactions in ion channels
Biophysical Journal, 1992 The dynamic interactions among ions and water molecules in ion channels are treated based on an assumption that ions at binding sites can be knocked off by both transient entering ions and local water molecules. The theory, when applied to a single-site model K+ channel, provides solutions for super- and subsaturations, flux-ratio exponent (n') greater
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Coarse Grained Ion-Ion and Ion-Water Interactions [PDF]
Biophysical Journal, 2012 A detailed knowledge of ion transfer mechanisms between water and low-polarity media is crucial for many areas of chemistry and biochemistry such as phase transfer catalysis, separations, and biomembranes. [1,2] It has become clear from experiments [3] and simulations[4] that the transfer of small hydrophilic ions from water to an immiscible organic ...
See-Wing Chiu, Eric Jakobsson
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Ion channels and ion selectivity [PDF]
Essays in Biochemistry, 2017 Specific macromolecular transport systems, ion channels and pumps, provide the pathways to facilitate and control the passage of ions across the lipid membrane. Ion channels provide energetically favourable passage for ions to diffuse rapidly and passively according to their electrochemical potential.
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Ion/ion chemistry of high-mass multiply charged ions [PDF]
Mass Spectrometry Reviews, 1998 Electrospray ionization has enabled the establishment of a new area of ion chemistry research based on the study of the reactions of high-mass multiply charged ions with ions of opposite polarity. The multiple-charging phenomenon associated with electrospray makes possible the generation of multiply charged reactant ions that yield charged products as ...
McLuckey, Scott A., Stephenson, James L.
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Ion-atom cold collision: Formation of cold molecular ion by radiative processes [PDF]
Physical Review A, 83, 022703 (2011), 2010 We discuss theoretically ion-atom collisions at low energy and predict the possibility of formation of cold molecular ion by photoassociation. We present results on radiative homo- and hetero-nuclear atom-ion cold collisions that reveal threshold behaviour of atom-ion systems.
arxiv +1 more source
Deterministic loading of a single strontium ion into a surface electrode trap using pulsed laser ablation [PDF]
arXiv, 2021 Trapped-ion quantum technologies have been developed for decades toward applications such as precision measurement, quantum communication and quantum computation. Coherent manipulation of ions' oscillatory motions in an ion trap is important for quantum information processing by ions, however, unwanted decoherence caused by fluctuating electric-field ...
arxiv
Ion-Ion Interaction at the Multi-Ion TRPV1 Pore [PDF]
Biophysical Journal, 2016 Proton released upon tissue injury, inflammation, or ischemia produces sustained pain that may be mediated by nociceptor TRPV1. Our previous study demonstrated that extracellular H+ not only activates the channel but also inhibits ion permeation. Voltage-dependence of H+ inhibition suggested that H+ moves halfway into the transmembrane electric field ...
Jie Zheng, Bo Hyun Lee
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Ion-beam driven dust ion-acoustic solitary waves in dusty plasmas [PDF]
Physics of Plasmas 17, 044502 (2010), 2010 The nonlinear propagation of small but finite amplitude dust ion-acoustic waves (DIAWs) in an ion-beam driven plasma with Boltzmannian electrons, positive ions and stationary charged dust grains, is studied by using the standard reductive perturbation technique (RPT). It is shown that there exist two critical values $(\gamma_{c1}$ and $\gamma_{c2})$ of
arxiv +1 more source
An ion trap-ion mobility-time of flight mass spectrometer with three ion sources for ion/ion reactions [PDF]
Journal of the American Society for Mass Spectrometry, 2009 This instrument combines the capabilities of ion/ion reactions with ion mobility (IM) and time-of-flight (TOF) measurements for conformation studies and top-down analysis of large biomolecules. Ubiquitin ions from either of two electrospray ionization (ESI) sources are stored in a three dimensional (3D) ion trap (IT) and reacted with negative ions from
Gregg M. Schieffer +6 more
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Propagation of arbitrary amplitude nonlinear quantum ion-acoustic waves in electron-ion plasmas: Dimensionality effects [PDF]
, 2010 Propagation of arbitrary-amplitude ion-acoustic solitary (IASWs) as well as periodic waves (IAPWs) is investigated in a fully degenerate quantum electron-ion plasma consisting of isothermal- or adiabatic-ion species. It is shown that the system dimensionality and degrees of freedom play critical roles in matching criteria for propagation of such waves.
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