Antioxidant activity of three seaweeds from tropical reefs of Brazil: potential sources for bioprospecting
| Autor: | Thiago Nogueira de Vasconcelos Reis, Edson Regis Tavares Pessoa Pinho de Vasconcelos, Mutue T. Fujii, Patrícia S. Bezerra, Juliane B. Vasconcelos, Vanessa Urrea-Victoria, Adilma de Lourdes Montenegro Cocentino, Daniela Maria do Amaral Ferraz Navarro, Arsenio J. Areces, Fungyi Chow |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Antioxidant ABTS biology ESTRESSE OXIDATIVO DPPH 010604 marine biology & hydrobiology medicine.medical_treatment Intertidal zone Plant Science Aquatic Science biology.organism_classification 01 natural sciences chemistry.chemical_compound Algae chemistry Sargassum medicine Ferric Food science Scavenging 010606 plant biology & botany medicine.drug |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | We report the first screening for antioxidant activity (AOX) of three dominant seaweeds from low intertidal reefs of Brazil. Sargassum furcatum, Bryothamnion triquetrum, and Osmundaria obtusiloba were extracted with dichloromethane and methanol (2:1), and AOX was measured by five UV-vis microplate spectrophotometric methods: DPPH (2,2-diphenyl-1-picryhydrazyl) and ABTS (2,2-azinobis (3-ethylbenzthiazoline-6-sulfonic acid)) free radical scavenging, metal chelating capacity, total phenolic compounds using reducing power by Folin-Ciocalteu and FRAP (ferric reducing antioxidant power). All studied species showed high AOX, even at very low extract concentrations. We can attribute these results to the stressful environment in which these seaweeds live, high hydrodynamics, air exposure during low spring tides, intense solar radiation, and other factors that may contribute to oxidative stress, featuring O. obtusiloba as a new source of natural antioxidants. |
| Databáze: | OpenAIRE |
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