Please use this identifier to cite or link to this item:
|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.|
|Editor:||ELSEVIER SCIENCE BV|
|Citation:||JOURNAL OF SUPERCRITICAL FLUIDS, v.55, n.3, p.998-1006, 2011|
|Appears in Collections:||FEA - Artigos e Outros Documentos|
Files in This Item:
|art_MARTINEZ-CORREA_Extracts_from_pitanga_Eugenia_uniflora_L_leaves_2011.pdf||published version||748.14 kB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.