Journal: | Quimica nova |
Database: | PERIÓDICA |
System number: | 000313389 |
ISSN: | 0100-4042 |
Authors: | Sousa, Cleyton Marcos de M1 Silva, Hilris Rocha e Vieira-Junior, Gerardo Magela Ayres, Mariane Cruz C Costa, Charllyton Luis S. da Araujo, Delton Servulo Cavalcante, Luis Carlos D Barros, Elcio Daniel S Araujo, Paulo Breitner de M Brandao, Marcela S Chaves, Mariana H |
Institutions: | 1Universidade Federal do Piaui, Departamento de Quimica, Teresina, Piaui. Brasil |
Year: | 2007 |
Season: | Abr |
Volumen: | 30 |
Number: | 2 |
Pages: | 351-355 |
Country: | Brasil |
Language: | Portugués |
Document type: | Artículo |
Approach: | Experimental |
English abstract | This paper describes total phenolics content and antioxidant activity in the ethanolic extract of leaves, bark and roots of five medicinal plants: Terminalia brasiliensis Camb., Terminalia fagifolia Mart. & Zucc., Copernicia cerifera (Miller) H.E. Moore, Cenostigma macrophyllum Tul. var. acuminata Teles Freire and Qualea grandiflora Mart. The total phenolics content of the plant extracts, determined by the Folin-Ciocalteu method, varied from 250.0 ±8,2 to 763,63 ± 13.03 mg of gallic acid equivalent/g dry EtOH extract. The antioxidant activity of extracts was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay system. Extract of bark from T. brasiliensis, the most active, with an EC50 value of 27.59 ± 0.82 µg/mL, was comparable to rutin (EC50 = 27.80 ± 1.38) and gallic acid (EC50 = 24.27 ± 0.31), used as positive controls. The relationship between total phenolic content and antioxidant activity was positive and significant for T. brasiliensis, C. macrophyllum and C. cerifera |
Disciplines: | Química |
Keyword: | Fitoquímica, Plantas medicinales, Fenoles totales, Actividad antioxidante, Terminalia brasiliensis, Terminalia fagifolia, Copernicia cerifera, Cenostigma macrophyllum, Qualea grandiflora |
Keyword: | Chemistry, Phytochemistry, Medicinal plants, Total phenols, Antioxidant activity, Terminalia brasiliensis, Terminalia fagifolia, Copernicia cerifera, Cenostigma macrophyllum, Qualea grandiflora |
Full text: | Texto completo (Ver HTML) |