摘要
This work proposes to compare the extraction of total polyphenols and the coloring obtained after several series of decoction at 100°C/20min, of whole or crushed leaves of Combretum micranthum. The total phenolic content of the extracts obtained after decoction was determined by Folin’s method. The color parameters were measured using a colorimeter based on the CIELAB system. The analysis of variance (ANOVA) shows significant differences (p 0.05) on different parameters evaluated. The Minitab 19 software was used to classify the extracts according to the color parameters (L, A, and B). The results showed that the maximum of polyphenols (21.67%) was extracted in the crushed leaves after three series of decoctions while with the whole leaves the maximum of 16.17% is obtained after six series of decoctions. The concentration of total polyphenols becomes low from four series of decoctions with 0.146 g·AG·100 g<sup>-</sup><sup>1</sup> MS. The red and yellow coloring drops respectively by 85 and 69% with crushed leaves and 64 and 21% with whole leaves. The conductivity and the brix of the extracts fall according to the series of decoctions. These results show that for optimal use of C. micranthum leaves in traditional medicine, crushed leaves and three series of decoctions are indicated and sufficient.
This work proposes to compare the extraction of total polyphenols and the coloring obtained after several series of decoction at 100°C/20min, of whole or crushed leaves of Combretum micranthum. The total phenolic content of the extracts obtained after decoction was determined by Folin’s method. The color parameters were measured using a colorimeter based on the CIELAB system. The analysis of variance (ANOVA) shows significant differences (p 0.05) on different parameters evaluated. The Minitab 19 software was used to classify the extracts according to the color parameters (L, A, and B). The results showed that the maximum of polyphenols (21.67%) was extracted in the crushed leaves after three series of decoctions while with the whole leaves the maximum of 16.17% is obtained after six series of decoctions. The concentration of total polyphenols becomes low from four series of decoctions with 0.146 g·AG·100 g<sup>-</sup><sup>1</sup> MS. The red and yellow coloring drops respectively by 85 and 69% with crushed leaves and 64 and 21% with whole leaves. The conductivity and the brix of the extracts fall according to the series of decoctions. These results show that for optimal use of C. micranthum leaves in traditional medicine, crushed leaves and three series of decoctions are indicated and sufficient.
作者
Papa Guedel Faye
Edouard Mbarick Ndiaye
Samba Baldé
Alioune Sow
Omar Khatab Cissé
Nicolas Cyrille Ayessou
Mady Cisse
Papa Guedel Faye;Edouard Mbarick Ndiaye;Samba Baldé;Alioune Sow;Omar Khatab Cissé;Nicolas Cyrille Ayessou;Mady Cisse(Laboratory of Water Energy Environment and Industrial Processes (LE3PI), Polytechnic Higher School, Cheikh Anta Diop University of Dakar (ESP-UCAD), Dakar, Senegal;UFR Agronomic Sciences, Aquaculture and Agrifood Technologies, Gaston BERGER University, Dakar, Senegal;National School of Agriculture, Iba Der THIAM University, Thies, Senegal;Center for Studies on Food Security and Functional Molecules (CESAM), Dakar, Senegal)
