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Related Concept Videos

Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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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

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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.
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Two-dimensional Gel Electrophoresis01:22

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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.
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Capillary Electrophoresis: Instrumentation01:20

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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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Overview Of Cell Separation And Isolation01:20

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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
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Dielectrophoretic manipulation and separation of microparticles using microarray dot electrodes.

Bashar Yafouz1, Nahrizul Adib Kadri2, Fatimah Ibrahim3

  • 1Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. bashar.yafouz@siswa.um.edu.my.

Sensors (Basel, Switzerland)
|April 8, 2014
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Summary
This summary is machine-generated.

This study presents a novel dielectrophoretic system for efficient microparticle manipulation and separation. The device utilizes dielectrophoresis (DEP) effects to rapidly sort particles by size.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Electrical Engineering

Background:

  • Microparticle manipulation is crucial for various applications, including diagnostics and drug delivery.
  • Existing methods for microparticle separation can be complex and time-consuming.

Purpose of the Study:

  • To introduce a novel dielectrophoretic system for microparticle manipulation and separation.
  • To demonstrate the system's effectiveness in size-dependent particle sorting.

Main Methods:

  • A five-layer system featuring microarray dot electrodes was designed and fabricated.
  • Size-dependent manipulation and separation experiments were conducted using 1, 5, and 15 μm polystyrene particles.

Main Results:

  • The dielectrophoretic system successfully manipulated and separated microparticles of different sizes.
  • Positive dielectrophoresis (DEP) attracted smaller particles to the electrode edge.
  • Negative DEP repelled larger particles towards the electrode center.

Conclusions:

  • The proposed dielectrophoretic system offers rapid and efficient microparticle manipulation and separation.
  • The system leverages both positive and negative DEP effects for size-based sorting.
  • This technology has potential applications in microfluidic devices and cell sorting.