(Invited) Isolating an Individual Ion Emitter and Light-Induced Tunneling Upconversion

Alamethicin is an antibiotic peptide from the fungus Trichoderma viride that forms ion channels in bilayer lipid membranes. Each peptide consists of 20 amino acids that can form larger channels with the congregation of multiple monomers of the peptide. These formed ion channels have some voltage dependent characteristics when a potential is induced across the bilayer. This potential can be from an applied voltage source or from an ion concentration gradient inducing a transmembrane potential across the membrane. The peptide alamethicin can be modeled as a conductor that allows the flow of ions through the membrane. The formed channels have distinct conductance level states caused by accumulation of additional alamethicin monomers being added to an individual ion channel. The voltage dependence of the accumulation of multiple ion channels can be modeled for the average response. A probabilistic model is used to capture the statistics of the state changes of individual channels. This type of model can be summed to simulate the conductance of multiple channels within a bilayer. This work focuses on obtaining the statistic for individual ion channels and using those statistics to show that a probabilistic model of the peptide’s conductance can capture some of the dynamics seen in aggregated responses. The Nernst equation is used to estimate the transmembrane potential caused by an ion gradient of a bilayer in equilibrium. This potential is used in the model to assist in determining the current conductance states of an individual channel of the peptide in the presence of an ion gradient. This paper will show the experimental results of ion currents across a bilayer induced by membrane potentials and the ion currents induced by ion gradients. The statistics of the measurements are used in a probabilistic conductance model of the peptide alamethicin.

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Temperatures of individual ion species and heating due to charge exchange in the ionosphere of Venus

Journal of Geophysical Research Atmospheres ◽

10.1029/ja095ia05p06569 ◽

1990 ◽

Vol 95 (A5) ◽

pp. 6569 ◽

Cited By ~ 16

Author(s):

Jhoon Kim ◽

Andrew F. Nagy ◽

Thomas E. Cravens ◽

Hiroyuki Shinagawa

Keyword(s):

Charge Exchange ◽

Individual Ion ◽

Ion Species

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Individual ion shifts from nuclear magnetic resonance spectra of aqueous solutions of electrolytes

Journal of the Chemical Society D Chemical Communications ◽

10.1039/c29700001426 ◽

1970 ◽

pp. 1426 ◽

Cited By ~ 6

Author(s):

J. Davies ◽

S. Ormondroyd ◽

M. C. R. Symons

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Aqueous Solutions ◽

Individual Ion ◽

Nuclear Magnetic Resonance Spectra ◽

Solutions Of Electrolytes ◽

Ion Shifts ◽

Magnetic Resonance Spectra ◽

Nuclear Magnetic

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Towards accurate values of individual ion activities

Fluid Phase Equilibria ◽

10.1016/j.fluid.2005.11.033 ◽

2006 ◽

Vol 241 (1-2) ◽

pp. 59-69 ◽

Cited By ~ 30

Author(s):

Grazyna Wilczek-Vera ◽

Eva Rodil ◽

Juan H. Vera

Keyword(s):

Individual Ion ◽

Ion Activities

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Electroosmotic effects in the determination of ion mobilities of carrier-free radionuclides in free aqueous electrolyte solutions

Radiochimica Acta ◽

10.1524/ract.2001.89.8.537 ◽

2001 ◽

Vol 89 (8) ◽

Cited By ~ 3

Author(s):

E. Mauerhofer ◽

O. Kling ◽

Frank Rösch

Keyword(s):

Aqueous Electrolyte ◽

Electrolyte Solutions ◽

Aqueous Electrolyte Solutions ◽

Individual Ion ◽

Carrier Free ◽

On Line ◽

The Absolute ◽

No Carrier Added

A device for on-line electromigration studies of radio-elements in free electrolytes has been tested by measuring the absolute individual ion mobilities of no-carrier-added single charged anions [

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Multiplexed Mass Spectrometry of Individual Ions Improves Measurement of Proteoforms and Their Complexes

10.21203/rs.3.pex-820/v1 ◽

2021 ◽

Author(s):

Jared O. Kafader ◽

Rafael D. Melani ◽

Kenneth R. Durbin ◽

Bon Ikwuagwu ◽

Bryan P. Early ◽

...

Keyword(s):

Mass Spectrometry ◽

Sample Preparation ◽

Spectrometry Method ◽

Mass Spectrometry Method ◽

Individual Ion ◽

Ion Mass Spectrometry ◽

The Individual ◽

Orbitrap Analyzer

Abstract Protocol for sample preparation, instrumental settings, and processing for the individual ion mass spectrometry method (I2MS) utilizing an Orbitrap analyzer.

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