nuclear magnetic resonance
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.

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  • nuclear magnetic resonance — n 1) the magnetic resonance of an atomic nucleus 2) chemical analysis that uses nuclear magnetic resonance esp. to study molecular structure abbr. NMR see MAGNETIC RESONANCE IMAGING * * * a measure, by means of applying an external magnetic field …   Medical dictionary

  • nuclear magnetic resonance — n. a phenomenon exhibited by various atomic nuclei when placed in a strong magnetic field, in which they absorb energy from specific, high frequency radio waves: the measurements of the magnetic moments of these nuclei, esp. of hydrogen, are used …   English World dictionary

  • nuclear magnetic resonance —  Nuclear Magnetic Resonance  (NMR)  Ядерно магнитный резонанс (ЯМР)   Явление резонансного поглощения радиочастотной электромагнитной энергии веществом с ненулевыми магнитным моментами ядер, находящимся во внешнем постоянном магнитном поле.… …   Толковый англо-русский словарь по нанотехнологии. - М.

  • Nuclear magnetic resonance — This article is about the physical phenomenon. For its use as a method in spectroscopy, see Nuclear magnetic resonance spectroscopy. NMR redirects here. For other uses, see NMR (disambiguation). First 1 GHz NMR Spectrometer (1000 MHz,… …   Wikipedia

  • nuclear magnetic resonance — Physics. the selective absorption of electromagnetic radiation by an atomic nucleus in the presence of a strong, static, magnetic field: used in research and in medicine to monitor tissue metabolism and to distinguish between normal and abnormal… …   Universalium

  • Nuclear Magnetic Resonance — Ein 300 MHz NMR Spektrometer Die Kern(spin)resonanzspektroskopie (NMR Spektroskopie von engl. nuclear magnetic resonance) ist eine spektroskopische Methode, welche die Untersuchung der elektronischen Umgebung einzelner Atome und der… …   Deutsch Wikipedia

  • nuclear magnetic resonance — magnetinis branduolių rezonansas statusas T sritis fizika atitikmenys: angl. nuclear magnetic resonance vok. kernmagnetische Resonanz, f; magnetische Kernresonanz, f rus. ядерный магнитный резонанс, m pranc. résonance magnétique nucléaire, f;… …   Fizikos terminų žodynas

  • nuclear magnetic resonance — magnetinis branduolių rezonansas statusas T sritis Standartizacija ir metrologija apibrėžtis Radijo bangų rezonansinė sugertis branduoliuose, esančiuose pastoviame magnetiniame lauke. atitikmenys: angl. nuclear magnetic resonance vok. magnetische …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • nuclear magnetic resonance — magnetinis branduolių rezonansas statusas T sritis chemija apibrėžtis Radijo bangų rezonansinis sugėrimas branduoliuose, esančiuose pastoviame magnetiniame lauke. santrumpa( os) MBR atitikmenys: angl. nuclear magnetic resonance rus. ядерный… …   Chemijos terminų aiškinamasis žodynas

  • nuclear magnetic resonance — noun resonance of protons to radiation in a magnetic field • Syn: ↑NMR, ↑proton magnetic resonance • Hypernyms: ↑magnetic resonance …   Useful english dictionary

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