Veuillez utiliser cette adresse pour citer ce document : http://dspace1.univ-tlemcen.dz/handle/112/2413
Titre: IMPACT OF SOLVENT EXTRACTION TYPE ON TOTAL POLYPHENOLS CONTENT AND BIOLOGICAL ACTIVITY FROM TAMARIX APHYLLA (L.) KARST
Auteur(s): MOHAMMEDI, Zohra
ATIK, Fawzia
Mots-clés: Tamarix aphylla
polyphenols
free radicals
DPPH
antioxidant activity
Date de publication: 2011
Résumé: Secondary metabolites of an arabo-saharan tree Tamarix aphylla (L.) Karst. Were extracted from dry powdered leaves with different solvents: aqueous methanol; aqueous ethanol, aqueous acetone and distilled water. Total phenolic content of the four extracts were determined by Folin Ciocalteu method and their antioxidant activity was assayed through in vitro radical scavenging activity using DPPH· assay. The results showed that mixture water-methanol was better than water-ethanol, wateracetone and water for extraction bioactive compounds in particularly total polyphenols from Tamarix aphylla leaves. The average total phenol content of aqueous methanol extract was 262.26mg GAE/100g dry weight lyophilized extract. However, all extracts were free-radical inhibitors but aqueous acetone extract was more potent than aqueous ethanol extract and two others extracts. In order of effectiveness (EC50), the potent inhibitors were from water-acetone extract (0.080mg/ml) > water-ethanol extract (0.140mg/ml)>water extract (0.173mg/ml)> Water-methanol (0.911mg/ml).
URI/URL: http://dspace.univ-tlemcen.dz/handle/112/2413
ISSN: 0975-6299
Collection(s) :Articles internationaux

Fichier(s) constituant ce document :
Fichier Description TailleFormat 
ZOHRA-MOHAMMEDI-Fawzia-ATIK.pdf232,96 kBAdobe PDFVoir/Ouvrir


Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.