nuclear magnetic resonance

American  

[noo-klee-er mag-net-ik rez-uh-nuhns, nyoo-] / ˈnu kli ər mægˈnɛt ɪk ˈrɛz ə nəns, ˈnyu- /

noun

Physics.

1. 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 cells. NMR

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nuclear magnetic resonance British  

noun

1.  NMR.  a technique for determining the magnetic moments of nuclei by subjecting a substance to high-frequency radiation and a large magnetic field. The technique is used as a method of determining structure See also electron spin resonance

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nuclear magnetic resonance Scientific  

1. The absorption of electromagnetic energy (typically radio waves) by the nuclei of atoms placed in a strong magnetic field. The nuclei of different atoms absorb unique frequencies of radiation depending on their environment, thus by observing which frequencies are absorbed by a sample placed in a strong magnetic field (and later emitted again, when the magnetic field is removed), it is possible to learn much about the sample's makeup and structure. Nuclear magnetic resonance has no known side effects on the human body, and is therefore used to analyze soft body tissues in magnetic resonance imaging (MRI).

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Pronunciation

See nuclear ( def. ).

Etymology

Origin of nuclear magnetic resonance

First recorded in 1940–45

Example Sentences

Then, the university researchers determined the compound's molecular structure using nuclear magnetic resonance and mass spectrometry, named it orfamide N after the family of molecules it belongs to, and investigated its biological activity.

From Science Daily

It used analytical techniques such as size exclusion chromatography, nuclear magnetic resonance, and scanning electron microscopy allowing scientists to examine not just how the teabags had changed visibly but also structurally.

From Science Daily

Using a combination of advanced techniques including single crystal X-ray diffraction, solid-state nuclear magnetic resonance and scanning transmission electron microscopy, the researchers found evidence of anisotropic atomic displacements of the titanium atoms in BaTiS3.

From Science Daily

Patterson credited talented graduate students, a diverse interdisciplinary team cooperating across campus and coast-to-coast, and the availability of technologies such as mass spectrometry and nuclear magnetic resonance platforms for making his lab's discoveries possible.

From Science Daily

“You have to be worrying about the supply at all times,” says Sophia Hayes, a chemist at Washington University in St. Louis who uses nuclear magnetic resonance machines to study the structure of materials.

From Science Magazine