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Related Concept Videos

Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

1.1K
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,...
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Electrophoresis: Overview01:20

Electrophoresis: Overview

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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...
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Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

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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...
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Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

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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...
7.2K
Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

1.7K
In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
1.7K
SDS-PAGE01:27

SDS-PAGE

32.7K
Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
A variation of gel electrophoresis, termed  polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact...
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Updated: Jan 13, 2026

A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice
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Electrophoretic separations on microfluidic chips.

Dapeng Wu1, Jianhua Qin, Bingcheng Lin

  • 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

Journal of Chromatography. A
|January 22, 2008
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Summary
This summary is machine-generated.

This review outlines microchip electrophoresis (MCE) developments, covering key characteristics like sample injection and joule heat. It highlights MCE

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Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Microfluidics

Background:

  • Microchip electrophoresis (MCE) offers advanced separation capabilities.
  • Understanding MCE's unique characteristics is crucial for its effective application.
  • Integration of MCE into microsystems requires knowledge of its operational parameters.

Purpose of the Study:

  • To provide a concise overview of electrophoretic separation in microfluidic chips.
  • To discuss novel developments and distinct characteristics of microchip electrophoresis.
  • To summarize achievements in separating small molecules, DNA, and proteins using MCE.

Main Methods:

  • Review of existing literature on microchip electrophoresis.
  • Discussion of critical factors influencing MCE performance: sample injection, joule heat, channel geometry, and surface effects.
  • Analysis of successful strategies and established conclusions in MCE.

Main Results:

  • Detailed examination of MCE's unique features, including sample injection plug, joule heat management, channel design, and surface adsorption/modification.
  • Identification of effective strategies and key findings in microchip electrophoresis.
  • Summary of significant advancements in the separation of small molecules, DNA, and proteins via MCE.

Conclusions:

  • Microchip electrophoresis is a powerful technique for complex separations.
  • Optimization of MCE parameters is essential for high-performance analysis.
  • MCE serves as a valuable functional unit for integrated microsystems in research and diagnostics.