Data/hora: 02/06/2024 15:43:53

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Optimization of Phenolics and Flavonoids Extraction Conditions and Antioxidant Activity of Roasted Yerba-Mate Leaves (Ilex paraguariensis A. St.-Hil., Aquifoliaceae) using Response Surface Methodology	
Autores: 	BASSANI,DÉBORA C.; NUNES,DOMINGOS S.; GRANATO,DANIEL.	
Data: 	2014-06-01	
Ano: 	2014	
Palavras-chave: 	Phenolic composition; Correlation analysis; Desirability function; Phytochemicals; Functional foods.	
Resumo: 	This study focused on maximizing the extraction of total phenolics and flavonoids as well as the antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay from roasted yerba mate (Ilex paraguariensis) as a function of time (5, 7.5 and 10 min) and temperature of extraction (60, 75 and 90°C). The data were subjected to Response Surface Methodology and the results showed that polynomial equations were significant, did not present lack of fit, and presented adjusted determination coefficients above 98%, proving their suitability for prediction purposes. Using the desirability function, the optimum operating conditions to obtain a higher extraction of antioxidants was found to be 10 min of extraction at 90°C, and the tea prepared under these experimental conditions presented 427.74 mg of gallic acid equivalents per liter and 80.02% of inhibition of the DPPH radical. The flavonoid content was highly correlated (r = 0.9046, p &lt; 0.001) to the antioxidant capacity.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200923	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201420130019	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.86 n.2 2014	
Fonte: 	info:eu-repo/semantics/openAccess