Phytochemical characterization, antioxidant potential and antimicrobial activity of Averrhoa carambola L. (Oxalidaceae) against multiresistant pathogens
Silva, K. B.; Pinheiro, C. T. S.; Soares, C. R. M.; Souza, M. A.; Matos-Rocha, T. J.; Fonseca, S. A.; Pavão, J. M. S. J.; Costa, J. G.; Pires, L. L. S.; Santos, A. F..
Braz. j. biol
; 2017.
Artículo
en Inglés
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LILACS-Express
| ID: biblio-1467450
Abstract The objective of this work was to perform the phytochemical characterization, to determine total phenols, antioxidant (AAO%) and antimicrobial potential of the ethanolic extracts of carambola. The phytochemical study was carried out through a qualitative analysis of the chemical constituents and quantitative determination of the phenol content By the Folin-Ciocalteu test. Qualitative and quantitative antioxidant tests were performed using the DPPH method (2,2 diphenyl-1-picryl-hydrazila) and iron reduction (FRAP). The minimum inhibitory concentration (MIC) was determined by microdilution in 96-well plates. The presence of pyrogallic tannins, steroids and saponins has been identified. The highest total phenol content, quantified in the samples, was found in the stem bark (0.0866 mgEAG/g) and in the fruit (0.0734 mgEAG/g). In the antioxidant evaluation, the extracts of the green fruit bagasse (AAO% 71.9%,) and stem bark at 50 g/mL (AAO% 94%) with CE50 23.7 g/mL. Leaf extracts, stem bark, ripe fruit bagasse and green fruit bagasse presented MICs of 100 g/mL against multiresistant pathogenic bacteria and fungi.
Biblioteca responsable:
BR68.1
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