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dc.contributor.authorEnerstvedt, Kjersti Hasle
dc.contributor.authorLundberg, Anders
dc.contributor.authorJordheim, Monica
dc.date.accessioned2018-05-02T07:18:33Z
dc.date.available2018-05-02T07:18:33Z
dc.date.issued2018
dc.identifier.issn1420-3049en_US
dc.identifier.urihttps://hdl.handle.net/1956/17675
dc.description.abstractHerein, the polyphenolic content in extracts of Ruppia cirrhosa (Petagna) Grande and Ruppia maritima L.was fully characterized for the first time. High amounts of the main compound chicoric acid (CA) (≤30.2 ± 4.3 mg/g) were found in both Ruppia species. In addition, eight flavonoids, namely the 3-O-glucopyranosides and 3-O-galactopyranosides, as well as malonylated 3-O-glycosides of quercetin and isorhamnetin, were isolated and identified. The antioxidant activity of Ruppia cirrhosa extracts and isolated compounds was investigated spectrophotometrically by a 1,1-diphenyl-2-picrylhydrazyl (DPPH·) radical scavenging assay. IC50 values were 31.8–175.7 μg/mL for Ruppia cirrhosa extracts and 12.1–88.4 μg/mL for isolated flavonoids. Both individual and total phenolic and flavonoid content were quantified in crude extracts using analytical HPLC. The relative high amount of total flavonoids ranged from 5.9 to 14.7 mg/g in both species, with concentrations of individual flavonoids ranging from 0.4 to 2.9 mg/g dry weight. The content of chicoric acid was twofold more in Ruppia maritima than in Ruppia cirrhosa. Seasonal variation of the quantitative content in Ruppia cirrhosa was examined. Total flavonoid content ranged from 8.4 mg/g in October to 14.7 mg/g in August, whereas the highest concentration of chicoric acid was observed in March (29.2 mg/g).en_US
dc.language.isoengeng
dc.publisherMDPIen_US
dc.relation.ispartof<a href="http://hdl.handle.net/1956/17676" target="blank"> Analysis of polyphenolic content in marine and aquatic angiosperms from Norwegian coastal waters</a>en_US
dc.rightsAttribution CC BYeng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/eng
dc.subjectRuppiaceaeeng
dc.subjectchicoric acideng
dc.subjectflavonoidseng
dc.subjectNMR characterizationeng
dc.subjectquantificationeng
dc.subjectantioxidant assayeng
dc.titleCharacterization of Polyphenolic Content in the Aquatic Plants Ruppia cirrhosa and Ruppia maritima —A Source of Nutritional Natural Productsen_US
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2017 by the authorsen_US
dc.source.articlenumber16
dc.identifier.doihttps://doi.org/10.3390/molecules23010016
dc.identifier.cristin1533460
dc.source.journalMolecules
dc.source.4023


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