http://www.webreview.dz/ Webreview est un site fédérateur des revues scientifiques. Il met à la disposition des utilisateurs un ensemble de revues scientifiques algériennes couvrant tous les domaines. Webreview est ouvert à toute revue désireuse de publier son contenu en ligne soit en mode d'accès complet ou restreint permettant ainsi la valorisation de la recherche scientifique en Algérie. Webreview et un projet développé par le CERIST au sein de la Division Recherche et Développement en Sciences de l'Information. Pour contacter Webreview par émail : webreview@mail.cerist.dz Pour contacter Webreview par courrier, fax ou téléphone : Centre de Recherche sur l'Information Scientifique et Technique (CERIST) Rue des 03 frères AISSOU, Ben-Aknoun, Alger, Algérie Tél/Fax : +(213)(0) 21.91.21.98 fr SPIP - www.spip.net http://www.webreview.dz/spip.php?article2204 http://www.webreview.dz/spip.php?article2204 2015-02-24T12:56:59Z text/html fr Abderrahim Jaouad, Aziz Hasib, Aziz Ouatmane, Fatima Dehbi, Hicham Elbatal, Mohamed Bouaziz, Sami Sayadi Prickly pear juices phenolics betaxanthins betacyanins antioxidant activity <p>Juices of nine prickly pears cultivars (Opuntia ficus-indica L.) were characterized in terms of phenolics and betalains pigment content. The antioxidant activity of juice was tested by means of two different methods : the 2,2-diphenyl-1 picrylhydrazyl (DPPH) methods, and the 2,2- azinobis(3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) methods. Juices contained total phenolics ranging from 354.37 to 643.66 μg gallic acid eq/g, betaxanthins (15.84 to 51.33 mg indicaxanthin/l), betacyanins (...)</p> - <a href="http://www.webreview.dz/spip.php?rubrique415" rel="directory">volume B</a> / <a href="http://www.webreview.dz/spip.php?mot8563" rel="tag">Prickly pear juices</a>, <a href="http://www.webreview.dz/spip.php?mot8564" rel="tag">phenolics</a>, <a href="http://www.webreview.dz/spip.php?mot8565" rel="tag">betaxanthins</a>, <a href="http://www.webreview.dz/spip.php?mot8566" rel="tag">betacyanins</a>, <a href="http://www.webreview.dz/spip.php?mot8567" rel="tag">antioxidant activity</a> <div class='rss_chapo'><p>Juices of nine prickly pears cultivars (Opuntia ficus-indica L.) were characterized in terms of phenolics and betalains pigment content. The antioxidant activity of juice was tested by means of two different methods : the 2,2-diphenyl-1 picrylhydrazyl (DPPH) methods, and the 2,2- azinobis(3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) methods. Juices contained total phenolics ranging from 354.37 to 643.66 μg gallic acid eq/g, betaxanthins (15.84 to 51.33 mg indicaxanthin/l), betacyanins (52.04 mg betanin/l for red juice) and antioxidant capacity (DPPH) ranging from 52.48 to 135.96μg/ml respectively. The total phenolic contents were highly correlated with ABTS (R2 = 0.868) and DPPH (R2 = 0.959) values. The phenolics compounds contribute more significantly to the total antioxidant capacity than betalain pigments.Therefore, the total phenolic contents can serve as a useful indicator for the antioxidant activities of prickly pear juices.</p></div>