Electrophoresis | Wikipedia audio article
Channel: wikipedia tts
Date: 06/05/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electrophoresis


00:01:23 1 History
00:01:32 2 Theory
00:02:50 3 See also



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SUMMARY
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Electrophoresis (from the Greek "Ηλεκτροφόρηση" meaning "to bear electrons") is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field. Electrophoresis of positively charged particles (cations) is sometimes called cataphoresis, while electrophoresis of negatively charged particles (anions) is sometimes called anaphoresis.
The electrokinetic phenomenon of electrophoresis was observed for the first time in 1807 by Russian professors Peter Ivanovich Strakhov and Ferdinand Frederic Reuss at Moscow State University, who noticed that the application of a constant electric field caused clay particles dispersed in water to migrate. It is ultimately caused by the presence of a charged interface between the particle surface and the surrounding fluid.  It is the basis for analytical techniques used in chemistry for separating molecules by size, charge, or binding affinity.
Electrophoresis is used in laboratories to separate macromolecules based on size. The technique applies a negative charge so proteins move towards a positive charge. Electrophoresis is used extensively in DNA, RNA and protein analysis.