- —electrophoretic /i lek'troh feuh ret"ik/, adj./i lek'troh feuh ree"sis/, n.1. Also called cataphoresis. Physical Chem. the motion of colloidal particles suspended in a fluid medium, due to the influence of an electric field on the medium.2. Biol. this technique, applied to sorting proteins according to their responses to an electric field. Cf. gel electrophoresis.[1910-15; ELECTRO- + Gk phóresis a being borne; see -PHORE, -SIS]
* * *Movement of electrically charged particles in a fluid under the influence of an electric field.The particles migrate toward the electrode of the opposite electric charge, often on a gel-coated slab or plate, sometimes in a fluid flowing down a paper. Originated about 1930 by Arne Tiselius (1902–1971) as a technique for analysis, electrophoresis is used to analyze and separate colloids (e.g., proteins) or deposit coatings.
* * *also called cataphoresisthe movement of electrically charged particles in a fluid under the influence of an electric field. If the liquid rather than the particles is set in motion—e.g., through a fixed diaphragm—the phenomenon is called electroosmosis.Electrophoresis is used to analyze and separate colloids (e.g., proteins) or to deposit coatings, as on elements used in electron tubes.About 1930 the Swedish chemist Arne Tiselius (Tiselius, Arne) introduced the use of electrophoresis as an analytic technique. Tiselius originated the moving-boundary method of observation, in which a layer of pure (i.e., without particles) fluid is placed over a quantity of the same fluid containing colloidal particles; the boundary between two layers of fluid is visible and moves at the speed of electrophoresis of the particles.
* * *
Look at other dictionaries:
Electrophoresis — is the most well known electrokinetic phenomenon. It was discovered by Reuss in 1809. [Reuss, F.F. Mem.Soc.Imperiale Naturalistes de Moscow , 2, 327 1809] He observed that clay particles dispersed in water migrate under influence of an applied… … Wikipedia
electrophoresis — n. 1. (Chem.) the motion of charged molecules or particles in a liquid medium under the influence of an electric field; particles with a positive charge move toward the cathode and negative to the anode. [WordNet sense 1] Syn: cataphoresis.… … The Collaborative International Dictionary of English
Electrophoresis — Couverture actuelle Titre abrégé Electrophoresis … Wikipédia en Français
electrophoresis — electrophoresis. См. электрофорез. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
Electrophoresis — Electrophoresis. См. Электрофорез. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
electrophoresis — [ē lek΄trōfə rē′sis, i lek΄trōfə rē′sis] n. [ModL < ELECTRO + (CATA)PHORESIS] the migration of charged colloidal particles or of molecules through a fluid or gel subjected to an electric field electrophoretic [ē lek΄trōfə ret′ik, i lek΄trōfə… … English World dictionary
electrophoresis — A ubiquitous molecular biology technique, with many variants, used to resolve complex mixtures of macromolecules into their components. Its principle is to subject samples to an electric field applied across a porous matrix. Molecules will… … Glossary of Biotechnology
electrophoresis — Separation of molecules based on their mobility in an electric field. High resolution techniques normally use a gel support for the fluid phase. Examples of gels used are starch, acrylamide, agarose or mixtures of acrylamide and agarose.… … Dictionary of molecular biology
Electrophoresis — Method used in clinical and research laboratories for separating molecules according their size and electrical charge. Electrophoresis is used to separate large molecules (such as DNA fragments or proteins) from a mixture of molecules. An… … Medical dictionary
electrophoresis — noun a) the migration of electrically charged molecules through a medium under the influence of an electric field b) a method for the separation and analysis of large molecules ( … Wiktionary