TITLE:
Chemical Characterization and Anti-Radical Activity of Fruits and Vegetables Commonly Consumed in Brazzaville
AUTHORS:
Gouollaly Tsiba, Josiane Enzonga Yoca, Mboungou-Bouesse Blondy, Andzi-Barhe Thimoleon, et Pascal Ongoka
KEYWORDS:
Fruit, Vegetables, Polyphenols, Flavonoid, Antiradical Activity
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.11 No.8,
August
18,
2020
ABSTRACT: 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, i.e. Ipomoea
batatas L. (536.02 ± 0.01 mg of GAE/100 g DW; 486.46 ± 0.10 mg of QtE/100 g DW), Cucurbita pepo (533.60 ± 0.05 mg of
GAE/100 g DW;
303.72 ± 0 mg of QtE/100 g DW), Hibiscus
sabdariffa (421.02 ± 0.015 mg of
GAE/100 g DW;
243.49 ± 0.10 mg of QtE/100 g DW), Solanum
negrum 1 (412.10
± 0.05 mg of GAE/100 g DW;
292.10 ± 0.14 mg of QtE/100 g of
DW) and, on the other hand, in the extracts of two species of fruit, i.e. Chrysophyllum
lacourtianum (532.79 ± 0.19 mg of GAE/100 g of DW; 380.55 ± 0.10 mg of QtE/100 g of DW) and seeds of Aframomum
alboviolaceum (469.38 ± 0.28 mg of GAE/100 g DW; 107.27 ± 0.10 mg of QtE/100 g DW). The lowest TPC and
TFC were obtained with the extracts of Brassica
campestris and of Spinacia oleracea, respectively 97.78 ± 0.17 GAE mg/100 g DW and 27.52 ± 0.10 QtE mg/100 g DW. The extract of the Saba senegalensis 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.