EM (electron microscope)

EM (electron microscope)
A microscope in which an electron beam replaces light to form the image. EM stands for electron microscope (the device) and for electron microscopy (the technique and field). EM has its pluses (greater magnification and resolution than optical microscopes) and minuses (you are not really "seeing" objects, but rather you are looking at their electron densities, and meaningless artifacts may abound). Nonetheless, EM has extended the range of the microscope. EM was invented by a team led by Vladimir Zworykin, an engineer at the RCA Laboratory in Camden, New Jersey. The device was publicly unveiled in 1940. The Belgian-born biochemist Albert Claude (1899-1983) was the first person to examine cells under EM and see a cancer-associated virus (thanks to EM). He did the lion's share of his research at the Rockefeller Institute (now the Rockefeller University) in New York and in 1974 shared the Nobel Prize in Physiology or Medicine with Christian De Duve and George Palade for "their discoveries concerning the structural and functional organization of the cell."

Medical dictionary. 2011.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • electron microscope — n an electron optical instrument in which a beam of electrons is used to produce an enlarged image of a minute object electron microscopist n electron microscopy n * * * a microscope that uses a beam of electrons as a radiation source for viewing …   Medical dictionary

  • electron microscope — n. an instrument that focuses a beam of electrons on an object, using electric or magnetic fields, to form an enlarged image of the object on a fluorescent screen, photographic plate, or cathode ray tube; specif., such an instrument in which the… …   English World dictionary

  • electron microscope — ► NOUN ▪ a microscope with high magnification and resolution, employing electron beams in place of light …   English terms dictionary

  • electron microscope — electron microscope. См. электронный микроскоп. (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.

  • electron microscope —  Electron Microscope  Электронный микроскоп   Микроскоп, позволяющий получать сильно увеличенное изображение объектов, используя рассеяние электронов. В отличие от оптического микроскопа, в электронном микроскопе используют потоки электронов и… …   Толковый англо-русский словарь по нанотехнологии. - М.

  • Electron microscope — Diagram of a transmission electron microscope A 197 …   Wikipedia

  • electron microscope — noun a microscope that is similar in purpose to a light microscope but achieves much greater resolving power by using a parallel beam of electrons to illuminate the object instead of a beam of light • Hypernyms: ↑microscope • Hyponyms: ↑field… …   Useful english dictionary

  • electron microscope — a microscope that uses a beam of electrons as a radiation source for viewing the specimen. The resolving power (ability to register fine detail) is a thousand times greater than that of an ordinary light microscope. The specimen must be examined… …   The new mediacal dictionary

  • electron microscope — UK / US noun [countable] Word forms electron microscope : singular electron microscope plural electron microscopes science a very powerful microscope that uses waves of electrons instead of light …   English dictionary

  • electron microscope — Abbreviation: EM A microscope that uses an electron beam focussed by magnetic lenses . See: scanning electron microscope …   Glossary of Biotechnology

  • electron microscope — elektroninis mikroskopas statusas T sritis fizika atitikmenys: angl. electron microscope; electronic microscope vok. Elektronenmikroskop, n rus. электронный микроскоп, m pranc. microscope électronique, m …   Fizikos terminų žodynas

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”