title: Bioprospecting medicinal plants for antioxidant components.
abstract: OBJECTIVE
  To evaluate antioxidant activities of seven medicinal plant species and their fractions, and to identify their phenolic compounds.
  
  
  METHODS
  Two extractions were processed and further fractionated by column chromatography to evaluate the concentration that inhibit 50% of 2,2'-azinobis (3-ethylbenzothiazoline-6-suslfonic acid, 1,1-diphenyl-2-picryl-hydrazyl radicals, and their ferric reducing antioxidant power. The identification of the fractions of phenolic compounds was done by ultra performance liquid chromatography.
  
  
  RESULTS
  The aqueous-acetone extracts of Feretia apodanthera and Ozoroa insignis exhibited the highest antioxidant potentials comparable to those of the standard quercetin. Their subsequently silica gel column fractionation showed three most active fractions from which the major constituents quercetin, myricetin, kampferol, rutin and isoquercetin were identified.
  
  
  CONCLUSIONS
  These plant species have potent antioxidant profiles and polyphenol compounds that may help to manage with radical related disease and aging.
authors.affiliation: Laboratory of Applied Biochimistry and Chemistry (LABIOCA), UFR/SVT, University of Ouagadougou, 09 BP 848 Ouagadougou 09, Burkina Faso; Division of Bioresource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia. Electronic address: coulahmede@yahoo.fr.
authors.forename: Ahmed Yacouba
authors.initials: AY
authors.lastname: Coulibaly
authors.affiliation: Division of Bioresource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Rokiah
authors.initials: R
authors.lastname: Hashim
authors.affiliation: School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Shaida Fariza
authors.initials: SF
authors.lastname: Sulaiman
authors.affiliation: Division of Bioresource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Othman
authors.initials: O
authors.lastname: Sulaiman
authors.affiliation: Division of Bioresource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Lily Zuin Ping
authors.initials: LZ
authors.lastname: Ang
authors.affiliation: School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Kheng Leong
authors.initials: KL
authors.lastname: Ooi
keywords: Antioxidant; Chemical identification; Medicinal plants; Polyphenols; UPLC analysis