| R: A quantitative measure of NMR signal receiving efficiency. | |
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MedLine Citation:
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PMID: 19647457 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Recognizing that the sensitivity of NMR is influenced by factors such as conductance and dielectric constant of the sample, we propose the receiving efficiency R to characterize how efficiently the NMR signal can be observed from a unit transverse magnetization in a sample under optimal probe tuning and matching conditions. Conveniently, the relative receiving efficiency can be defined as the ratio of the NMR signal induced by a unit transverse magnetization in a sample of interest and a reference solution. Based on the reciprocal relationship between excitation and observation in NMR, the relative receiving efficiency can be correlated with the 90 degrees pulse length (tau(90)). In the special case of perfect probe tuning (impedance matched to 50 Omega), R is inversely proportional to tau(90). Application of the NMR receiving efficiency in quantitative analysis potentially enables a single external concentration reference for almost any sample, eliminating the need to know its exact chemical composition or detailed electromagnetic properties. |
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Authors:
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Huaping Mo; John Harwood; Shucha Zhang; Yi Xue; Robert Santini; Daniel Raftery |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2009-07-09 |
Journal Detail:
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Title: Journal of magnetic resonance (San Diego, Calif. : 1997) Volume: 200 ISSN: 1096-0856 ISO Abbreviation: J. Magn. Reson. Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-09-16 Completed Date: 2009-12-01 Revised Date: 2011-09-26 |
Medline Journal Info:
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Nlm Unique ID: 9707935 Medline TA: J Magn Reson Country: United States |
Other Details:
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Languages: eng Pagination: 239-44 Citation Subset: IM |
Affiliation:
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Purdue Interdepartmental NMR Facility, Purdue University, West Lafayette, IN 47907, USA. hmo@purdue.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Computer Simulation Magnetic Resonance Spectroscopy / methods* Models, Chemical* Sensitivity and Specificity |
| Grant Support | |
ID/Acronym/Agency:
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1R01GM085291-01/GM/NIGMS NIH HHS; 5R01-RR-018294/RR/NCRR NIH HHS; R01 GM085291-01/GM/NIGMS NIH HHS; R01 RR018294-04/RR/NCRR NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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