File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Antioxidant phenolic constituents in roots of Rheum officinale and Rubia cordifolia: Structure-radical scavenginq activity relationships

TitleAntioxidant phenolic constituents in roots of Rheum officinale and Rubia cordifolia: Structure-radical scavenginq activity relationships
Authors
KeywordsAnthraquinones
Antioxidant activity
Hydroxyanthraquinones
Phenolic constituents
Radical scavenging activity
Rheum officinale
Rubia cordifolia
Structure-activity relationships
Issue Date2004
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcau
Citation
Journal Of Agricultural And Food Chemistry, 2004, v. 52 n. 26, p. 7884-7890 How to Cite?
AbstractThe phenolic constituents in the roots of Rheum officinale and Rubia cordifolia were identified with the aid of high-performance liquid chromatography and liquid chromatography-mass spectrometry and by comparison with authentic standards. A total of 17 hydroxyanthraquinones, gallic acid, and tannins were separated, and 14 of them were identified, being the main phenolic constituents present. Their antioxidant activity (Trolox equivalent antioxidant capacity) was evaluated using the improved 2,2-azino-bis(3-ethylbenzothiazoline- 6-sulfonic acid)diammonium salt method. Hydroxyanthraquinones were the predominant antioxidant phenolic constituents in the roots of R. cordifolia, and tannins and gallic acid were the predominant antioxidant phenolic constituents in the roots of R. officinale. The structure-radical scavenging activity relationships of the tested hydroxyanthraquinones were systematically demonstrated as follows: Hydroxy groups on one benzene ring of the anthraquinone structure were essential for hydroxyanthraquinones to show activity, the ortho-dihydroxy structure in the hydroxyanthraquinone molecules could greatly enhance their radical scavenging effect, and glycosylation of the hydroxyanthraquinones reduced activity.
Persistent Identifierhttp://hdl.handle.net/10722/68707
ISSN
2015 Impact Factor: 2.857
2015 SCImago Journal Rankings: 1.246
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCai, Yen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorXing, Jen_HK
dc.contributor.authorCorke, Hen_HK
dc.date.accessioned2010-09-06T06:06:56Z-
dc.date.available2010-09-06T06:06:56Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of Agricultural And Food Chemistry, 2004, v. 52 n. 26, p. 7884-7890en_HK
dc.identifier.issn0021-8561en_HK
dc.identifier.urihttp://hdl.handle.net/10722/68707-
dc.description.abstractThe phenolic constituents in the roots of Rheum officinale and Rubia cordifolia were identified with the aid of high-performance liquid chromatography and liquid chromatography-mass spectrometry and by comparison with authentic standards. A total of 17 hydroxyanthraquinones, gallic acid, and tannins were separated, and 14 of them were identified, being the main phenolic constituents present. Their antioxidant activity (Trolox equivalent antioxidant capacity) was evaluated using the improved 2,2-azino-bis(3-ethylbenzothiazoline- 6-sulfonic acid)diammonium salt method. Hydroxyanthraquinones were the predominant antioxidant phenolic constituents in the roots of R. cordifolia, and tannins and gallic acid were the predominant antioxidant phenolic constituents in the roots of R. officinale. The structure-radical scavenging activity relationships of the tested hydroxyanthraquinones were systematically demonstrated as follows: Hydroxy groups on one benzene ring of the anthraquinone structure were essential for hydroxyanthraquinones to show activity, the ortho-dihydroxy structure in the hydroxyanthraquinone molecules could greatly enhance their radical scavenging effect, and glycosylation of the hydroxyanthraquinones reduced activity.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcauen_HK
dc.relation.ispartofJournal of Agricultural and Food Chemistryen_HK
dc.subjectAnthraquinonesen_HK
dc.subjectAntioxidant activityen_HK
dc.subjectHydroxyanthraquinonesen_HK
dc.subjectPhenolic constituentsen_HK
dc.subjectRadical scavenging activityen_HK
dc.subjectRheum officinaleen_HK
dc.subjectRubia cordifoliaen_HK
dc.subjectStructure-activity relationshipsen_HK
dc.subject.meshAntioxidants - analysis - chemistry-
dc.subject.meshFree Radical Scavengers - chemistry-
dc.subject.meshPhenols - analysis-
dc.subject.meshPlant Roots - chemistry-
dc.subject.meshRheum - chemistry-
dc.titleAntioxidant phenolic constituents in roots of Rheum officinale and Rubia cordifolia: Structure-radical scavenginq activity relationshipsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8561&volume=52&issue=26&spage=7884&epage=7890&date=2004&atitle=Antioxidant+phenolic+constituents+in+roots+of+rheum+officinale+and+rubia+cordifolia:+structure-radical+scavenging+activity+relationshipsen_HK
dc.identifier.emailCai, Y: yzcai@hkucc.hku.hken_HK
dc.identifier.emailSun, M: meisun@hkucc.hku.hken_HK
dc.identifier.emailCorke, H: harold@hku.hken_HK
dc.identifier.authorityCai, Y=rp00661en_HK
dc.identifier.authoritySun, M=rp00779en_HK
dc.identifier.authorityCorke, H=rp00688en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/jf0489116-
dc.identifier.pmid15612771-
dc.identifier.scopuseid_2-s2.0-11144241260en_HK
dc.identifier.hkuros103553en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-11144241260&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue26en_HK
dc.identifier.spage7884en_HK
dc.identifier.epage7890en_HK
dc.identifier.isiWOS:000225985700024-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCai, Y=8684149300en_HK
dc.identifier.scopusauthoridSun, M=7403181447en_HK
dc.identifier.scopusauthoridXing, J=37162498100en_HK
dc.identifier.scopusauthoridCorke, H=7007102942en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats