Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/839
Type: Artigo de periódico
Title: Extracts from pitanga (Eugenia uniflora L.) leaves: Influence of extraction process on antioxidant properties and yield of phenolic compounds
Author: MARTINEZ-CORREA, Hugo A.
MAGALHAES, Pedro M.
QUEIROGA, Carmen L.
PEIXOTO, Camila A.
OLIVEIRA, Alessandra L.
CABRAL, Fernando A.
Abstract: Different extraction processes were employed to extract the polyphenolic compounds from pitanga (Eugenia uniflora L) leaves: a one-step process using water, ethanol or supercritical CO(2) as solvents, and a two-step process using supercritical CO(2) followed by either water or ethanol. The total polyphenolic compounds, total flavonoids and antioxidant activity were determined in all the extracts obtained. The process performance was evaluated with respect to three variables: global extraction yield, concentration and yield of both polyphenols and flavonoids in the extracts. For the one-step extraction, the results showed that the extraction yield increased with solvent polarity. For the two-step process, the results suggested that water was more efficient in extracting the phenolic compounds from E. uniflora when the matrix was previously extracted with scCO(2). With respect to the antioxidant activity, the ethanolic extracts obtained from both processes, using either the DPPH radical scavenging method or the beta-carotene bleaching method, presented high antioxidant activities. (C) 2010 Elsevier B.V. All rights reserved.
Subject: Eugenia uniflora L.
Supercritical extraction
Phenolic compounds
Antioxidants
Country: Holanda
Editor: ELSEVIER SCIENCE BV
Citation: JOURNAL OF SUPERCRITICAL FLUIDS, v.55, n.3, p.998-1006, 2011
Rights: fechado
Identifier DOI: 10.1016/j.supflu.2010.09.001
Address: http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000286959000016&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord
http://dx.doi.org/10.1016/j.supflu.2010.09.001
Date Issue: 2011
Appears in Collections:FEA - Artigos e Outros Documentos

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