Source:http://linkedlifedata.com/resource/pubmed/id/21520953
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
19
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| pubmed:dateCreated |
2011-5-12
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| pubmed:abstractText |
Temperature-dependent FTIR spectra of linoleic acid were measured over a temperature range of -80 to -30 °C to explore solid-state low-temperature (LT) ? middle-temperature (MT) phase transition of linoleic acid. Band assignments were made mainly for the 900-760 cm(-1) region, where the bands due to cis-olefin group's ?C-H out-of-plane mode and the progression bands due to CH(2) rocking-CH(2) twisting modes are expected to appear. The structural evolutions during the LT ? MT phase transition of linoleic acid were investigated by analyzing the progression bands with the simple-coupled oscillator model to elucidate the features of acyl chain influenced with two cis-C?C bonds linked through one CH(2) group. Structure changes in the LT ? MT transition of linoleic acid were compared with those in the ? ? ? transition of oleic acid. It has been found that the former is rather localized around the cis-diene group, while the latter occurs in the larger portion between the cis-olefin group to the methyl end. It is also suggested that the conformational change in the cis-olefin group on the LT ? MT transition is on a lesser scale than that on the ? ? ? transition.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:chemical | |
| pubmed:status |
MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
1520-5207
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| pubmed:author | |
| pubmed:copyrightInfo |
© 2011 American Chemical Society
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| pubmed:issnType |
Electronic
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| pubmed:day |
19
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| pubmed:volume |
115
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
6289-95
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| pubmed:meshHeading | |
| pubmed:year |
2011
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| pubmed:articleTitle |
Solid-state low temperature?middle temperature phase transition of linoleic acid studied by FTIR spectroscopy.
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| pubmed:affiliation |
Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan.
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| pubmed:publicationType |
Journal Article
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