Source:http://linkedlifedata.com/resource/pubmed/id/21034103
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
10
|
| pubmed:dateCreated |
2010-11-1
|
| pubmed:abstractText |
In this paper, an instrumentation of the Earth's field nuclear magnetic resonance (EFNMR) inside a laboratory is presented. A lock-in analysis (LIA) technique was proposed to enhance the signal-to-noise ratio (SNR). A SNR of 137.8 was achieved in a single measurement for 9 ml tap water, and the LIA technique significantly enhanced the SNR to 188 after a 10-average in a noisy laboratory environment. The proton-phosphorus coupling in trimethyl phosphate ((CH(3)O)(3)PO) with J-coupling J[H,F]=(10.99±0.013)?Hz has been demonstrated. The LIA technique improves the SNR, and a 2.6-fold improvement in SNR over that of the frequency-adjusted averaging is achieved. To reduce the noise in EFNMR, it was suggested that the LIA technique and the first order gradient shim be used to achieve a subhertz linewidth.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Oct
|
| pubmed:issn |
1089-7623
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| pubmed:author | |
| pubmed:issnType |
Electronic
|
| pubmed:volume |
81
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
104104
|
| pubmed:meshHeading | |
| pubmed:year |
2010
|
| pubmed:articleTitle |
A study of J-coupling spectroscopy using the Earth's field nuclear magnetic resonance inside a laboratory.
|
| pubmed:affiliation |
Department of Physics/Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan.
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| pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|