Non-Magnetic Resonance

resonance of protons to radiation in a magnetic field

Nuclear magnetic resonance. NMR spectroscopy is useful for chemical analysis and determining the structure of molecules because the resonance frequency of a particular element are influenced by the atom's chemical surroundings. It can determine the chemical structure of organic compounds.

Nuclear Magnetic Resonance, a technique to identify atoms in a sample by measuring the signal given off by the relaxation of e.g. protons previously aligned in a strong magnetic field.

Nuclear Magnetic Resonance Spectroscopy - Technique for determining chemical structure of materials. Typically used for organic materials.

Nuclear Magnetic Resonance. See Magnetic Resonance Imaging.

nuclear magnetic resonance. a sophisticated analytical instrument used toidentify metabolites in a sample.

See Nuclear Magnetic Resonance.

(MRI) Nuclear Magnetic Resonance; the property of certain molecules whereby their orientation can be altered by a combination magnetic fields and radio waves. This characteristic provides the basis of MRI.

Nuclear Magnetic Resonance. NMR spectroscopy makes it possible to discriminate nuclei, typically protons, in different chemical environments. The electron distribution gives rise to a chemical shift of the resonance frequency. The chemical shift of a nucleus is expressed in parts per million (ppm) by its frequency, n, relative to a standard, ref, and defined as = 106 (n - ref)/o, where o is the operating frequency of the spectrometer. It is an indication of the chemical state of the group containing the nucleus. More information is derived from the spin-spin couplings between nuclei, which give rise to multiplet patterns. Greater detail may be derived from two- or three- dimensional techniques. These use pulses of radiation at different nuclear frequencies, after which the response of the spin system is recorded as a free- induction decay (FID). Multidimensional techniques, such as COSY and NOESY, make it possible to deduce the structure of a relatively complex molecule such as a small protein (molecular weight up to 25,000).

Nuclear Magnetic Resonance. A spectroscopic technique used by scientists to elucidate chemical structure and molecular dynamics. [ Chapter 1

Nuclear Magnetic Resonance. An imaging technique which relies on the way some atoms have a nucleus that spins. When a sample is put in a magnetic field, some of its nuclei align themselves with that field. Radio waves tuned to the frequency at which those nuclei spin (or resonate) are used to knock them out of alignment. When the radio is turned off, the nuclei fall back into line, releasing pulses of radio waves that the imaging machine uses to build up a picture.

nuclear magnetic resanance

Nuclear-Magnetic Resonance. The original name for MRI technology. The term NMR fell out of favor because activists got confused by the presence of “Nuclear” in the moniker and picketted NMR manufacturers: “Stop the nukes!” If you are still refer to “the NMR,” you're dating yourself.