Fenóis totais e atividade antioxidante de cinco plantas medicinais

Química Nova

Cleyton Marcos De M. Sousa¹  Hilris Rocha E Silva¹  Gerardo Magela Vieira-jr.¹  Mariane Cruz C. Ayres¹  Charllyton Luis S. Da Costa¹  Delton Sérvulo Araújo¹  Luis Carlos D. Cavalcante¹  Elcio Daniel S. Barros¹  Paulo Breitner De M. Araújo¹  Marcela S. Brandão¹  Mariana H. Chaves¹ 

[1] ,Universidade Federal do Piauí Departamento de Química Teresina PI ,Brasil

关键词: total phenolics;    antioxidant activity;    medicinal plants;   

DOI  :  10.1590/S0100-40422007000200021

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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