Screening of twenty-four South African Combretum and six Terminalia species (Combretaceae) for antioxidant activities

dc.contributor.authorMasoko, Peter
dc.contributor.authorEloff, Jacobus Nicolaas
dc.date.accessioned2008-06-11T07:45:04Z
dc.date.available2008-06-11T07:45:04Z
dc.date.issued2007
dc.description.abstractThe dried leaves of Combretum and Terminalia species (Combretaceae) were extracted with acetone, hexane, dichloromethane and methanol. Thin layer chromatography (TLC) plates were developed under saturated conditions and sprayed with 0.2% 2,2-diphenyl-1-picryl hydrazyl (DPPH) in methanol for antioxidant screening. Visualization of separated bands exhibiting antioxidant activities enabled the localization and the subsequent identification of the potential active compounds. The acetone and methanol extracts displayed the presence of antioxidant activity after spraying the chromatogram with DPPH. Hexane and dichloromethane extracts did not have any antioxidant activity. C. hereroense had the highest number of active compounds, followed by C. collinum ssp. taborense, which were 16 and 10, respectively. Acetone extracts of all tested Combretum species had 53 active bands and methanol had 55. All Terminalia species extracted with acetone and methanol had antioxidant activity. T. gazensis and T. mollis methanol extracts had 11 and 14 active compounds respectively in one of the solvent systems used. The qualitative DPPH assay on TLC was successfully used in this study to systematically assess the total antioxidant activity of the Combretum and Terminalia species extracts.en
dc.format.extent302370 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationMasoko, P & Eloff, JN 2007, 'Screening of twenty-four South African Combretum and six Terminalia species (Combretaceae) for antioxidant activities', African Journal of Traditional Complementary and Alternative Medicines, vol. 4, no. 2, pp. 231-239. [http://www.africanethnomedicines.net/ojs2/index.php/ajtcam/index]en
dc.identifier.issn0189-6016
dc.identifier.other7005589445
dc.identifier.otherE-6204-2012
dc.identifier.urihttp://hdl.handle.net/2263/5886
dc.language.isoenen
dc.publisherAfrican Networks on Ethnomedicinesen
dc.rightsAfrican Networks on Ethnomedicinesen
dc.subjectCombretaceaeen
dc.subjectTerminalia speciesen
dc.subjectCombretum speciesen
dc.subjectAntioxidantsen
dc.subject2, 2, diphenyl-1-picrylhydrazyl (DPPH)en
dc.subject.lcshTerminaliaen
dc.subject.lcshAntioxidantsen
dc.subject.otherVeterinary science articles SDG-03en_ZA
dc.subject.otherSDG-03: Good health and well-being
dc.titleScreening of twenty-four South African Combretum and six Terminalia species (Combretaceae) for antioxidant activitiesen
dc.typeArticleen

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