The objective of this study was to analyze ten (10) species of edible vegetables and nine (9) fruit commonly found in Congo (Brazzaville) in order to determine their total polyphenol content (TPC) and total flavonoid ...The objective of this study was to analyze ten (10) species of edible vegetables and nine (9) fruit commonly found in Congo (Brazzaville) in order to determine their total polyphenol content (TPC) and total flavonoid content (TFC), and their antiradical activity by the method of 1,1-diphenyl-2-picrylhydrazyl (DPPH). The results obtained showed that the highest TPC and TFC were found, on the one hand, in the extracts of four species of vegetables,</span><i> </i></span><i><span style="font-family:Verdana;"><i></span></i><i><span style="font-family:""><span style="font-family:Verdana;">i.e. </span><span style="font-family:Verdana;">Ipomoea batatas L</span></span></i><i><span style="font-family:Verdana;">.</i> </span></i><span style="font-family:Verdana;">(536.02 ± 0.01 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;486.46</span><span style="font-family:""> </span><span style="font-family:Verdana;">± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Cucurbita pepo</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">(533.60 ± 0.05 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;303.72 ± 0 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Hibiscus sabdariffa</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">(421.02 ± 0.015 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;243.49 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Solanum negrum</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> 1</span><span style="font-family:""> </span><span style="font-family:Verdana;">(412.10 ± 0.05 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;292.10 ± 0.14 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW) and, on the other hand, in the extracts of two species of fruit, </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;"> <i>Chrysophyllum lacourtianum</i></span><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> (532.79 ± 0.19 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW;380.55 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW) and seeds of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Aframomum alboviolaceum</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> (469.38 ± 0.28 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;107.27 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW). The lowest TPC and TFC were obtained with the extracts of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Brassica campestris</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> and of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Spinacia oleracea</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;">, respectively 97.78 ± 0.17 GAE mg/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW and 27.52 ± 0.10 QtE mg/100</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">g DW. The extract of the</span><i> </i></span><i><span style="font-family:Verdana;"><i></span></i><i><span style="font-family:Verdana;">Saba senegalensis</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">pulp had the lowest TPC and TFC. In addition, the highest antiradical activity was observed with extracts from vegetables and fruit with high TPC and TFC. The results indicate that these vegetables and fruit could be potential sources of the phenolic compounds and the biomolecules having several biological activities. Thus, their consumption might be an alternative in the prevention of chronic diseases.展开更多
文摘The objective of this study was to analyze ten (10) species of edible vegetables and nine (9) fruit commonly found in Congo (Brazzaville) in order to determine their total polyphenol content (TPC) and total flavonoid content (TFC), and their antiradical activity by the method of 1,1-diphenyl-2-picrylhydrazyl (DPPH). The results obtained showed that the highest TPC and TFC were found, on the one hand, in the extracts of four species of vegetables,</span><i> </i></span><i><span style="font-family:Verdana;"><i></span></i><i><span style="font-family:""><span style="font-family:Verdana;">i.e. </span><span style="font-family:Verdana;">Ipomoea batatas L</span></span></i><i><span style="font-family:Verdana;">.</i> </span></i><span style="font-family:Verdana;">(536.02 ± 0.01 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;486.46</span><span style="font-family:""> </span><span style="font-family:Verdana;">± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Cucurbita pepo</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">(533.60 ± 0.05 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;303.72 ± 0 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Hibiscus sabdariffa</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">(421.02 ± 0.015 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;243.49 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW), </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Solanum negrum</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> 1</span><span style="font-family:""> </span><span style="font-family:Verdana;">(412.10 ± 0.05 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;292.10 ± 0.14 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW) and, on the other hand, in the extracts of two species of fruit, </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;"> <i>Chrysophyllum lacourtianum</i></span><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> (532.79 ± 0.19 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW;380.55 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g of DW) and seeds of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Aframomum alboviolaceum</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> (469.38 ± 0.28 mg of GAE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW;107.27 ± 0.10 mg of QtE/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW). The lowest TPC and TFC were obtained with the extracts of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Brassica campestris</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> and of </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">Spinacia oleracea</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;">, respectively 97.78 ± 0.17 GAE mg/100</span><span style="font-family:""> </span><span style="font-family:Verdana;">g DW and 27.52 ± 0.10 QtE mg/100</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">g DW. The extract of the</span><i> </i></span><i><span style="font-family:Verdana;"><i></span></i><i><span style="font-family:Verdana;">Saba senegalensis</span></i><i><span style="font-family:Verdana;"></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:Verdana;">pulp had the lowest TPC and TFC. In addition, the highest antiradical activity was observed with extracts from vegetables and fruit with high TPC and TFC. The results indicate that these vegetables and fruit could be potential sources of the phenolic compounds and the biomolecules having several biological activities. Thus, their consumption might be an alternative in the prevention of chronic diseases.
