STABILITY STUDY OF POLYPHENOLS EXTRACTED FROM THE LEAF SHEATH OF RED SORGHUM (SORGHUM CAUDATUM) FROM BENIN.
Journal Title: International Journal of Advanced Research (IJAR) - Year 2018, Vol 6, Issue 10
Abstract
L?extrait brut aqueux de la gaine foliaire du sorgho rouge est tr?s utilis? au B?nin et dans la sous-r?gion ouest-africaine ? des fins alimentaires et/ou pharmacologiques. Cependant, les conditions de son extraction-conservation (forte temp?rature, pH basique, milieu aqueux) laissent croire ? une ?ventuelle d?gradation des mol?cules pouvant r?duire l?activit? attendue des extraits. La pr?sente ?tude a pour but d??valuer l?influence des conditions d?extraction-conservation sur la stabilit? des extraits. A cet effet, l?extrait brut r?alis? ? partir de la poudre de la gaine foliaire du sorgho a ?t? soumis ? diff?rentes conditions de pH (acide, neutre et basique), de temp?rature (basse temp?rature : 4?C et temp?rature ambiante) et de luminosit? (? la lumi?re du jour et ? l?abri de la lumi?re) pendant un mois. Un pr?l?vement de chaque ?chantillon est r?alis? tous les sept jours, pour l?analyse des diff?rentes familles des compos?s ph?noliques par spectrophotom?trie. Des r?sultats obtenus il ressort qu?? pH neutre, les anthocyanes se conservent mieux ? froid (moins de 5% de d?gradation) qu?? temp?rature ambiante (18 ? 20% de d?gradation). Mais ? temp?rature ?gale, la lumi?re n?a pratiquement pas d?effet sur les pigments anthocyaniques du sorgho (moins de 2% de d?gradation ? la lumi?re apr?s 28 jours). Toute famille confondue, le milieu neutre ou l?g?rement acide ? basse temp?rature et ? l?obscurit? constitue les conditions optimales pour la conservation de l?extrait aqueux du sorgho rouge.
Authors and Affiliations
Agbangnan Dossa cokou pascal, Gboha?da virginie, Koudoro yaya alain, Wotto Dieudonne valentin, Sohounhloue C. K. Dominique.
Keywords
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- EP ID EP409641
- DOI 10.21474/IJAR01/7844
- Views 33
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