Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

2.3K
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
2.3K
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

1.4K
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
1.4K
Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

1.3K
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
1.3K
Electrophoresis: Overview01:20

Electrophoresis: Overview

4.3K
Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
There...
4.3K
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

752
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
752
Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

7.7K
Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
7.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Interplay between an Absorbing Phase Transition and Synchronization in a Driven Granular System.

Physical review letters·2024
Same author

Optimal work in a harmonic trap with bounded stiffness.

Physical review. E·2019
Same author

Development of the jaw sensorimotor control and chewing - a systematic review.

Physiology & behavior·2018
Same author

Bite or brain: Implication of sensorimotor regulation and neuroplasticity in oral rehabilitation procedures.

Journal of oral rehabilitation·2018
Same author

Effect of friction on dense suspension flows of hard particles.

Physical review. E·2017
Same author

Blast Dynamics in a Dissipative Gas.

Physical review letters·2015
Same journal

Corrigendum: Shells of charge: a density functional theory for charged hard spheres (2016<i>J. Phys. Condens. Matter</i><b>28</b>244006).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Nuclear spin coherence properties of<sup>151</sup>Eu<sup>3+</sup>and<sup>153</sup>Eu<sup>3+</sup>in a Y<sub>2</sub>O<sub>3</sub>transparent ceramic.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Corrigendum: The Hubbard dimer: a density functional case study of a many-body problem (2015<i>J. Phys.: Condens. Matter</i><b>27</b>393001).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Antibonding-induced counterintuitive thermal transport behavior: A first-principles study of quaternary compounds BaCdXF(X=As,P,Sb).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Topological properties of curved spacetime extended Su-Schrieffer-Heeger model.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Influence of lattice expansion on Cr ferromagnetism in Ce<sub>(1-x)</sub>La<sub>(x)</sub>CrGe<sub>3</sub>compounds revealed by atomic-scale measurements.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
See all related articles

Related Experiment Video

Updated: Feb 18, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

9.0K

Planar screening by charge polydisperse counterions.

M Trulsson1,2, E Trizac2, L Šamaj3

  • 1Theoretical Chemistry, Lund University, Lund, Sweden.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 15, 2017
PubMed
Summary
This summary is machine-generated.

Counterions with varying charges screen electric fields differently than uniform charges. Smallest valence counterions dominate long-distance interactions, altering membrane behavior and revealing new scaling laws.

More Related Videos

High-throughput Screening for Small-molecule Modulators of Inward Rectifier Potassium Channels
10:07

High-throughput Screening for Small-molecule Modulators of Inward Rectifier Potassium Channels

Published on: January 27, 2013

15.7K
Assembly and Characterization of Polyelectrolyte Complex Micelles
08:44

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

11.6K

Related Experiment Videos

Last Updated: Feb 18, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

9.0K
High-throughput Screening for Small-molecule Modulators of Inward Rectifier Potassium Channels
10:07

High-throughput Screening for Small-molecule Modulators of Inward Rectifier Potassium Channels

Published on: January 27, 2013

15.7K
Assembly and Characterization of Polyelectrolyte Complex Micelles
08:44

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

11.6K

Area of Science:

  • Physical Chemistry
  • Colloid and Surface Science
  • Computational Physics

Background:

  • Charged membranes interact via electric fields screened by counterions.
  • Non-uniform counterion charge distributions significantly impact these interactions.
  • Understanding these effects is crucial for colloid and surface science applications.

Purpose of the Study:

  • To analytically investigate counterion screening of charged planar membranes with valence distributions.
  • To compare theoretical predictions with numerical solutions and simulations.
  • To elucidate the role of counterion valence distribution on electrostatic interactions.

Main Methods:

  • Non-linear Poisson-Boltzmann theory for one- and two-plate systems.
  • Analytical calculations for asymptotic predictions.
  • Comparison with numerical Poisson-Boltzmann solutions and Monte Carlo simulations.

Main Results:

  • Counterions with the lowest valence dictate long-range interactions.
  • Continuous charge distributions reveal new power-law dependencies for ionic density and pressure.
  • Discrete distributions, experimentally relevant, exhibit similar scaling laws over observable ranges.

Conclusions:

  • Counterion valence distribution qualitatively alters electrostatic screening compared to monodisperse cases.
  • Continuous and discrete charge distributions show persistent scaling laws, with discrete mixtures mimicking continuous behavior.
  • The findings offer insights into electrostatic interactions in complex ionic environments.