NMR
nuclear magnetic resonance u"cle*ar mag*net"ic res"on*ance n. (Physics) The specific absorption and re-emission of electromagnetic radiation at characteristic wavelengths by atomic nuclei in a magnetic field. It is abbreviated {NMR}. The wavelength of the radiation absorbed depends on the type of nucleus, the intensity of the magnetic field, and the local chemical environment in which the nucleus resides. It is the latter effect (called the chemical shift), by which atoms of specific elements in different chemical compounds show a different resonance frequency, which gives rise to the greatest utility of this phenomenon in analyzing the chemical structure of substances. Similar effects of the chemical environment permit the discrimination of different types of living tissue by virtue of their different chemical composition, thus permitting utilization of the phenomenon in medical diagnostic instruments, especially for {magnetic resonance imaging}. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • NMR — 〈Abk. für engl.〉 Nuclear Magnetic Resonance: magnetische Kernresonanz, Kerninduktion …   Universal-Lexikon

  • NMR — sigla ES ingl. Nuclear Magnetic Resonance, risonanza magnetica nucleare Sinonimi: RMN …   Dizionario italiano

  • NMR — 〈Abk. für engl.〉 Nuclear Magnetic Resonance (magnetische Kernresonanz), = Kerninduktion …   Lexikalische Deutsches Wörterbuch

  • NMR — [Abk. für engl. nuclear magnetic resonance = Kernspinresonanz]: = Kernspintomographie …   Das Wörterbuch medizinischer Fachausdrücke

  • NMR — (Nuclear Magnetic Resonance) non radiation based imaging technique in which a substance or body part is subjected to a magnetic field …   English contemporary dictionary

  • NMR — abbrev. nuclear magnetic resonance …   English World dictionary

  • NMR — Die Abkürzung NMR steht für: Kernspinresonanzspektroskopie, NMR Spektroskopie, die auf der Kernspinresonanz (von engl. nuclear magnetic resonance) beruht. Nilgiri Mountain Railway, eine Bergbahn in Indien Diese Seite ist eine Begrif …   Deutsch Wikipedia

  • NMR — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom.   Sigles d’une seule lettre   Sigles de deux lettres > Sigles de trois lettres   Sigles de quatre lettres …   Wikipédia en Français

  • NMR — abbr. (also nmr) nuclear magnetic resonance. * * * noun resonance of protons to radiation in a magnetic field • Syn: ↑nuclear magnetic resonance, ↑proton magnetic resonance • Hypernyms: ↑magnetic resonance * * * abbreviation nuclear magnetic… …   Useful english dictionary

  • NMR — Nuclear Magnetic Resonance. An imaging technique that does not use radiation. * * * Abbreviation for nuclear magnetic resonance. * * * national medical resources; neonatal mortality rate; nictitating membrane response; nuclear magnetic resonance… …   Medical dictionary

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