Polyphenolic Constituents and antioxidant properties of the Juçara Palmtree (Euterpe edulis) fruit pulp / Constituintes polifenolicos e propriedades antioxidantes da polpa do fruto da palmeira Juçara (Euterpe edulis)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Introduction. A large number of studies have pointed out the importance for human health of an enormous variety of phytochemicals occurring in foods because of their role as antioxidants and metabolic signalers. The fruit of the palmtree jussara (Euterpe edulis Mart.) shares both compositional and sensory properties with assai (Euterpe oleraceae Mart.), and has been recently recognized as being a rich source of macronutrients and phenolic substances. This fruit is capable of nutritionally and commercially competing with assai, one of the Amazonian products that has become almost a symbol of Brazil. Objective. To determine the polyphenolic composition and the antioxidant capacity of the whole extract of the jussara fruit pulp. Methods. The polyphenolic composition was determined by a combination of solid phase fractionation and mass spectrometry in the MS and MS/MS modes. For the antioxidant capacity, in vitro tests were employed based on the bleaching of colored solutions containing the stable free radicals, 2,2 -azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) and three different analytical standards in each system. Results. Thirteen anthocyanins and twelve other compounds, including phenolic acids and flavonoids, were identified. The methanolic extract of the whole, fresh pulp, and the anthocyanin fraction, exhibited substantial in-vitro antioxidant capacities. Conclusion. The fresh jussara palmtree fruit showed to be a rich source of polyphenols and to possess greater antioxidant capacity than that already known for assai

ASSUNTO(S)

phenolics antioxidants assai antioxidantes açai euterpe edulis polifenois

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