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  5. Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ
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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/8145
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dc.contributor.authorExarchou, V.en
dc.contributor.authorTroganis, A.en
dc.contributor.authorGerothanassis, I. P.en
dc.contributor.authorTsimidou, M.en
dc.contributor.authorBoskou, D.en
dc.date.accessioned2015-11-24T16:39:21Z-
dc.date.available2015-11-24T16:39:21Z-
dc.identifier.issn0021-8561-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/8145-
dc.rightsDefault Licence-
dc.subjectantioxidantsen
dc.subjectlamiaceae plantsen
dc.subjectcaffeic aciden
dc.subjectrosmarinic aciden
dc.subjectdqf-cosyen
dc.subjecthmqcen
dc.subjecthmbcen
dc.subjectnmr spectroscopyen
dc.subjectrp-hplcen
dc.subjectlow-density-lipoproteinen
dc.subjectnmr-spectroscopyen
dc.subjectoxidationen
dc.subjectinhibitionen
dc.subjectoreganoen
dc.subjectantioxidantsen
dc.subjectquercetinen
dc.titleIdentification and quantification of caffeic and rosmarinic acid in complex plant extracts by the use of variable-temperature two-dimensional nuclear magnetic resonance spectroscopyen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primaryDoi 10.1021/Jf990928e-
heal.identifier.secondary<Go to ISI>://000166695100002-
heal.identifier.secondaryhttp://pubs.acs.org/doi/pdfplus/10.1021/jf990928e-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.publicationDate2001-
heal.abstractA combination of advanced nuclear magnetic resonance (NMR) methodologies for the analysis of complex phenolic mixtures that occur in natural products is described, with particular emphasis on caffeic acid and its ester derivative, rosmarinic acid. The combination of variable-temperature two-dimensional proton-proton double quantum filter correlation spectroscopy (H-1-H-1 DQF COSY) and proton-carbon heteronuclear multiple quantum coherence (H-1-C-13 HMQC) gradient NMR spectroscopy allows the identification and tentative quantification of caffeic and rosmarinic acids at 243 K in extracts from plants of the Lamiaceae family, without resorting to previous chromatographic separation of the components. The use of proton-carbon heteronuclear multiple bond correlation (H-1-C-13 HMBC) gradient NMR spectroscopy leads to the complete assignment of the correlations of the spins of H-2a and H-3a with the ester and carboxyl carbons of rosmarinic and caffeic acid, even at room temperature, and confirms the results of the above methodology. Quantitative results are in reasonable agreement with reverse phase HPLC measurements.en
heal.publisherAmerican Chemical Societyen
heal.journalNameJ Agric Food Chemen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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