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Related to electrophoretic: Electrophoretic coating, Electrophoretic display, Electrophoretic mobility


(ĭlĕk'trōfərē`sĭs): see colloidcolloid
[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
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(also cataphoresis), the migration of colloidal particles or ionized macromolecules under the influence of an external electric field. Electrophoresis was discovered by F. F. Reuss in 1807; it is regarded as the most important electrokinetic phenomenon. An approximate relation between the velocity v of the moving particles and the electric field strength E is given by Smoluchowski’s equation:

where η is the viscosity of the medium, D is the dielectric constant, and £ is the electrokinetic potential.

Electrophoresis is used in electrochemistry to study the electric double layer and ion adsorption on a surface; it also has medical applications. In industry it is used to isolate natural rubber from latex, purify water, and separate kaolin from sand. It is used in biochemistry to analyze, separate, and purify biopolymers (chiefly proteins), bacterial cells, viruses, amino acids, and vitamins.

The practical application of electrophoresis began after the Swedish scientist A. Tiselius designed a special apparatus for the moving-boundary electrophoresis of proteins in solution (1937). Electrophoretic methods involving the use of inert carriers, such as paper and gels, have gained the widest application. They have been given the general designation of zone electrophoresis because fractions of the separate substances form separate immiscible zones in the carrier. Electrophoresis is frequently combined with other methods of separating organic compounds, for example, with chromatography. A technique has been developed for concentrating the electrophoretic zones of biopolymers in gels, which increases the resolving power of the method (disk electrophoresis). The combining of the antigen-antibody reaction with electrophoresis was the basis for the creation of immunoelectrophoresis. Electrophoretic analysis of biological fluids, such as blood serum (used primarily to study proteins), is widely used in the diagnosis of many diseases.


Larskii, E. G. Melody zonal’nogo elektroforeza. Moscow, 1971.
Dukhin, S. S., and B. V. Deriagin. Elektroforez. Moscow, 1976.



(physical chemistry)
An electrochemical process in which colloidal particles or macromolecules with a net electric charge migrate in a solution under the influence of an electric current. Also known as cataphoresis.


The science of objects moving in a fluid when an electric charge is applied. Electrophoresis is the basis of E Ink's electronic paper display technology (see E Ink).
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Electrophoretic deposition--Electrophoretic deposition was performed with a home-built system comprised of a high voltage power supply (Glassman model MKO1P75.
2-4) These methods are electrophoretic deposition (the process where charged particles are deposited from a suspension into an electrode of opposite charge) and electrolytic deposition (the process whereby metal oxide can be deposited on a cathode using an aqueous solution of the metal salt).
Electrophoretic transfer of proteins from polyacrylamide gels to nitrocellulose sheets: procedure and some applications.
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Although smears were observed on the electrophoretogram (likely due to the polydispersity and/or heterogeneous size distribution in the hyaluronic acid samples), difference in electrophoretic pattern was discernable for HAs of different size: the higher the MW, the slower the mobility (Fig.
Studies [7-10] revealed that the nature of the anionic part of ILs affects slightly the electrophoretic mobility and the IL concentration influences the general electrophoretic mobility of the separation media.
Non-electrophoretic materials to gain market share: Both liquid crystals and electrochromic materials will grow in importance as platforms for e-paper, although e-paper displays based on electrophoretic materials will continue to take the largest share of the market.
Because it is applied by electrophoretic deposition, this new product is particularly suited to the demands of electroplating companies.
The investigators did not find any statistical differences in the electrophoretic patterns of the proteins in the frozen-thawed cheeses, compared to the corresponding proteins found in the controls.
All isolates had similar pulsed-field gel electrophoretic profiles when analyzed with the Salm-gene protocol (6).
The new work offers "a very promising approach for fast electrophoretic differentiation of molecules," comments Narayana R.
An investigation of 495 animal isolates showed that 128 had an electrophoretic pattern indistinguishable from that of the resistant strain in humans, and 14 of those were TMP-SMZ resistant.