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Article: Analysis of antioxidant activity and antioxidant constituents of Chinese toon

TitleAnalysis of antioxidant activity and antioxidant constituents of Chinese toon
Authors
KeywordsAntioxidants
Chinese toon
DPPH
Lipid peroxidation
Phenolic compounds
Toona sinensis
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/wps/find/journaldescription.cws_home/717426/description#description
Citation
Journal Of Functional Foods, 2009, v. 1 n. 3, p. 253-259 How to Cite?
AbstractAntioxidant activity of the methanol and water extracts of Chinese toon (Toona sinensis) leaf was evaluated using DPPH radical scavenging and lipid peroxidation assays. Contents of four major types of antioxidants including β-carotene, ascorbate, α-tocopherol and phenolics were also quantified. Open column chromatography followed by semi-preparative HPLC were applied to separate phenolic antioxidants whose contents were subsequently determined by HPLC. The methanol extract demonstrated much higher antioxidant activity than the water extract. Contents of β-carotene, ascorbate, α-tocopherol and phenolics were 1.23 μmol g -1, 34.2 μmol g -1, 2.40 μmol g -1 and 872 μmol gallic acid equivalents g -1, respectively. Six phenols were isolated. Their structures were characterized as 5-O-galloylquinic acid, gallic acid, methyl gallate, β-1,2,6-tri-O-galloyl-d-glucose, quercetin 3-O-β-d-glucopyranoside and quercetin 3-O-(2′′-O-galloyl)-β-d-glucopyranoside, respectively. The results indicate that phenolic compounds are the dominant antioxidants in Chinese toon. The compounds β-1,2,6-tri-O-galloyl-d-glucose and quercetin 3-O-(2′′-O-galloyl)-β-d-glucopyranoside were reported for the first time in Chinese toon. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/89287
ISSN
2015 Impact Factor: 3.973
2015 SCImago Journal Rankings: 1.346
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheng, KWen_HK
dc.contributor.authorYang, RYen_HK
dc.contributor.authorTsou, SCSen_HK
dc.contributor.authorLo, CSCen_HK
dc.contributor.authorHo, CTen_HK
dc.contributor.authorLee, TCen_HK
dc.contributor.authorWang, Men_HK
dc.date.accessioned2010-09-06T09:54:57Z-
dc.date.available2010-09-06T09:54:57Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Functional Foods, 2009, v. 1 n. 3, p. 253-259en_HK
dc.identifier.issn1756-4646en_HK
dc.identifier.urihttp://hdl.handle.net/10722/89287-
dc.description.abstractAntioxidant activity of the methanol and water extracts of Chinese toon (Toona sinensis) leaf was evaluated using DPPH radical scavenging and lipid peroxidation assays. Contents of four major types of antioxidants including β-carotene, ascorbate, α-tocopherol and phenolics were also quantified. Open column chromatography followed by semi-preparative HPLC were applied to separate phenolic antioxidants whose contents were subsequently determined by HPLC. The methanol extract demonstrated much higher antioxidant activity than the water extract. Contents of β-carotene, ascorbate, α-tocopherol and phenolics were 1.23 μmol g -1, 34.2 μmol g -1, 2.40 μmol g -1 and 872 μmol gallic acid equivalents g -1, respectively. Six phenols were isolated. Their structures were characterized as 5-O-galloylquinic acid, gallic acid, methyl gallate, β-1,2,6-tri-O-galloyl-d-glucose, quercetin 3-O-β-d-glucopyranoside and quercetin 3-O-(2′′-O-galloyl)-β-d-glucopyranoside, respectively. The results indicate that phenolic compounds are the dominant antioxidants in Chinese toon. The compounds β-1,2,6-tri-O-galloyl-d-glucose and quercetin 3-O-(2′′-O-galloyl)-β-d-glucopyranoside were reported for the first time in Chinese toon. © 2009 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/wps/find/journaldescription.cws_home/717426/description#descriptionen_HK
dc.relation.ispartofJournal of Functional Foodsen_HK
dc.rightsJournal of Functional Foods. Copyright © Elsevier BV.en_HK
dc.subjectAntioxidantsen_HK
dc.subjectChinese toonen_HK
dc.subjectDPPHen_HK
dc.subjectLipid peroxidationen_HK
dc.subjectPhenolic compoundsen_HK
dc.subjectToona sinensisen_HK
dc.titleAnalysis of antioxidant activity and antioxidant constituents of Chinese toonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1756-4646&volume=1&issue=3&spage=253&epage=259&date=2009&atitle=Analysis+of+antioxidant+activity+and+antioxidant+constituents+of+Chinese+toonen_HK
dc.identifier.emailLo, CSC: clivelo@hkucc.hku.hken_HK
dc.identifier.emailWang, M: mfwang@hku.hken_HK
dc.identifier.authorityLo, CSC=rp00751en_HK
dc.identifier.authorityWang, M=rp00800en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jff.2009.01.013en_HK
dc.identifier.scopuseid_2-s2.0-68149117181en_HK
dc.identifier.hkuros163917en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-68149117181&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume1en_HK
dc.identifier.issue3en_HK
dc.identifier.spage253en_HK
dc.identifier.epage259en_HK
dc.identifier.isiWOS:000284560000002-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridCheng, KW=12141247000en_HK
dc.identifier.scopusauthoridYang, RY=35727397400en_HK
dc.identifier.scopusauthoridTsou, SCS=7003660958en_HK
dc.identifier.scopusauthoridLo, CSC=15737175700en_HK
dc.identifier.scopusauthoridHo, CT=7404652573en_HK
dc.identifier.scopusauthoridLee, TC=8215406500en_HK
dc.identifier.scopusauthoridWang, M=7406691844en_HK

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