Overhauser effectn.

Brit.

/ˈəʊvəˌhaʊzə(r) ᵻˌfɛkt/, U.S.

/ˈoʊvərˌ(h)aʊzər əˌfɛk(t)/

Origin: From a proper name, combined with an English element. Etymons: proper name Overhauser , effect n.

Etymology: < the name of Albert Warner Overhauser (1925–2011), U.S. physicist, who published an account of the phenomenon in 1953 ( Physical Rev. 89 689) + effect n.

Chemistry.

More fully nuclear Overhauser effect. An effect whereby changing the populations of spin states of a nucleus by selective radio-frequency irradiation results in an enhanced magnetic resonance of nearby nuclei.

ΚΠ

1955 Science 22 Apr. 591/1 G. M. Volkoff, ‘Overhauser effect and its suggested application to nuclear alignment’.

1955 Physical Rev. 99 559 A nuclear Overhauser effect has been observed in anhydrous hydrofluoric acid.

1991 in Chem. Brit. 27 1093/2 The introduction of two independent time parameters into the NMR experiment opened up a Pandora's box of new possibilities..[including] recognition of proximity (the Overhauser effect).

2001 J. Clayden et al. Org. Chem. xxxii. 848 Analysis of coupling constants and nuclear Overhauser effects allows: determination of configuration, even in noncrystalline compounds [and] determination of conformation in solution.

This is a new entry (OED Third Edition, December 2004; most recently modified version published online March 2022).

单词	overhauser effect
释义	Overhauser effectn. Brit. /ˈəʊvəˌhaʊzə(r) ᵻˌfɛkt/, U.S. /ˈoʊvərˌ(h)aʊzər əˌfɛk(t)/ Origin: From a proper name, combined with an English element. Etymons: proper name Overhauser , effect n. Etymology: < the name of Albert Warner Overhauser (1925–2011), U.S. physicist, who published an account of the phenomenon in 1953 ( Physical Rev. 89 689) + effect n. Chemistry. More fully nuclear Overhauser effect. An effect whereby changing the populations of spin states of a nucleus by selective radio-frequency irradiation results in an enhanced magnetic resonance of nearby nuclei. ΚΠ 1955 Science 22 Apr. 591/1 G. M. Volkoff, ‘Overhauser effect and its suggested application to nuclear alignment’. 1955 Physical Rev. 99 559 A nuclear Overhauser effect has been observed in anhydrous hydrofluoric acid. 1991 in Chem. Brit. 27 1093/2 The introduction of two independent time parameters into the NMR experiment opened up a Pandora's box of new possibilities..[including] recognition of proximity (the Overhauser effect). 2001 J. Clayden et al. Org. Chem. xxxii. 848 Analysis of coupling constants and nuclear Overhauser effects allows: determination of configuration, even in noncrystalline compounds [and] determination of conformation in solution. This is a new entry (OED Third Edition, December 2004; most recently modified version published online March 2022). < n.1955
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