Total Phenolic Contents and Antioxidant Activity in Oxidized Leaves of Mate (Ilex paraguariensis St. Hil)



Document title: Total Phenolic Contents and Antioxidant Activity in Oxidized Leaves of Mate (Ilex paraguariensis St. Hil)
Journal: Brazilian archives of biology and technology
Database: PERIÓDICA
System number: 000392658
ISSN: 1516-8913
Authors: 1
2
1
3
1
1
Institutions: 1Universidade Regional Integrada do Alto Uruguai e das Missoes, Programa de Pos-Graduacao em Ecologia, Erechim, Rio Grande do Sul. Brasil
2Universidade Federal do Parana, Programa de Pos-graduacao em Bioquimica, Curitiba, Parana. Brasil
3Universidade Regional Integrada do Alto Uruguai e das Missoes, Departamento de Ciencias da Saude, Erechim, Rio Grande do Sul. Brasil
Year:
Season: Nov-Dic
Volumen: 57
Number: 6
Pages: 997-1003
Country: Brasil
Language: Inglés
Document type: Nota breve o noticia
Approach: Analítico, descriptivo
English abstract Ilex paraguariensis is a native species to South America. Its economic importance is in the use of its leaves and twigs in the processing of a product popularly known as “ chimarrão”. The aim of this study was to evaluate the correlations between some physicochemical process parameters in the oxidation of I. paraguariensis leaves oxidation. The leaves of Maté with age 1.0, 6.5 and 12.0 months were subjected to an oxidation process for 3 h under different relative humidity conditions (80, 9 0 and 99%) at 26°C. The extracts were evaluated usi ng the experimental design techniques to maximize the oxidation conditions for the total polyphenols, antioxidant capacity, water activity and color. The condition of 90% humidity and leaf age 6.5 months resulted in lower ligh tness and yellow color of the product. Green color was not significantly influenced by the studied parameters. The highest levels of total phenols and antioxidant potential were found when the leaf age was one month and humid ity was 90%. Thus, it could be concluded that the air humid ity of the chamber and leaf age influenced the oxidation process of the leaves of Maté as well as the antioxidant capacity of the extract obtained
Disciplines: Química
Keyword: Fitoquímica,
Ilex paraguariensis,
Yerba mate,
Fenoles,
Propiedades fisicoquímicas,
Actividad antioxidante
Keyword: Chemistry,
Phytochemistry,
Ilex paraguariensis,
Yerba mate,
Phenols,
Physicochemical properties,
Antioxidant activity
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