Overhauser effect

[′ō·vər‚hau̇z·ər i‚fekt]

(atomic physics)

The effect whereby, if a radio frequency field is applied to a substance in an external magnetic field, whose nuclei have spin ½ and which has unpaired electrons, at the electron spin resonance frequency, the resulting polarization of the nuclei is as great as if the nuclei had the much larger electron magnetic moment.

Mentioned in

Overhauser, Albert W.

References in periodicals archive

[sup.1]H-[sup.1]H Nuclear Overhauser Effect Spectroscopy (NOESY) NMR Spectroscopy.

Characterization of [alpha]-Glucosidase Inhibitor/Cyclodextrin Complex Prepared by Freeze-Drying

Proton based Nuclear Overhauser Effect spectroscopy (NOESY) was performed to determine the molecular level interactions between the PEO and additives in dry films.

Molecular motifs for additives that retard PEO crystallization

The nuclear Overhauser Effect spectroscopy (NOESY) was performed with the allylic alcohol obtained by the reduction of the corresponding ester.

Tandem Chlorination - Oxidation - Wittig Reactions: An Efficient Approach to (Z)-a-chloro-a,b-unsaturated esters

Furthermore, the nuclear Overhauser effect (NOE) cross-peaks between H-6 ([delta] 6.79) and both the anomeric proton ([delta] 5.29) and the methoxy group (8 3.88) were observed in the ROESY spectrum of M5-1 (Fig.

Wedelolactone metabolism in rats through regioselective glucuronidation catalyzed by uridine diphosphate-glucuronosyltransferases 1As (UGT1As)

Typical one-dimensional NMR spectra were acquired for each of the samples employing the first increment of NOESY (Nuclear Overhauser effect spectroscopy) pulse sequence (NOESYPR1D).

Persistent organic pollutants modify gut microbiota-host metabolic homeostasis in mice through aryl hydrocarbon receptor activation

Part IV touches upon methodology such as relaxation time analysis, the Nuclear Overhauser Effect, chemical exchange, 2D spectroscopy, solid-state NMR, and perturbation due to intermolecular interactions.

Applied NMR Spectroscopy for Chemists and Life Scientists

Proton COSY (correlation spectroscopy) ROESY (rotating frame Overhauser effect spectroscopy)1H-13C HSQC (heteronuclear single quantum coherence) and HMBC (heteronuclear multi-bond correlation) NMR (Nuclear Magnetic Resonance) experiments were recorded in d4-methanol on a Bruker DRX 600 spectrometer.

Gas Chromatography-Mass Spectrometry Analysis of Agarwood Extracts from Mature and Juvenile Aquilaria malaccensis

Application of the nuclear Overhauser effect," Journal of the American Chemical Society, vol.

Study of a conformational equilibrium of lisinopril by HPLC, NMR, and DFT

Shirmer, The Nuclear Overhauser Effect, Academic, New York, NY, USA, 1971.

Water-protein interactions: the secret of protein dynamics