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Antioxidant activity in vitro from bark and wood capsule extracts of castanha-do-brazil

Author: 
Mariangela Soares de Azevedo, ValériaMoreno Martão, Caroline IolandaCorsino do Carmo Sousa, Jussara RojaseSilva Aizzo, Valter Ferreira de Andrade-Neto, Valeska Santana de Sena Pereira, Adaiane Spinelli and Wiss Kraw Bacelar Jr.
Subject Area: 
Physical Sciences and Engineering
Abstract: 

In this work we evaluated the antioxidant activity of ethanolic extract and fractions from Bertholletia excela, castanha-do-brazil, using the free radical scavenging method of free radical DPPH (2,2-diphenyl-1-picrylhydrazyl). Currently many studies have focused on the inhibition of free radicals, as these are associated with various diseases related to the action of these chemical species. The UV-Visible spectroscopy apparatus was used to read the absorbances. With this data it was possible to obtain the antioxidant activity percentages (AA%) and the free radical inhibition of DPPH (EC50). The extracts and fractions of Bertholletia excelsa bark showed lower DPPH inhibition value or approximate value compared to the Ginkgo biloba positive control. On the other hand, the wood capsule showed no significant value.

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