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Título: | Phenolic constituents and antioxidant activity of geopropolis from two species of amazonian stingless bees |
Título(s) alternativo(s): | Constituintes fenó:licos e atividade antioxidante da geopró:Polis de duas espé:cies de abelhas sem ferrão amazônicas |
Autor: | Silva, Ellen Cristina Costa da Muniz, Magno Perêa Nunomura, Rita de Cássia Saraiva Nunomura, Sergio Massayoshi Zilse, Gislene Almeida Carvalho |
Data do documento: | 2013 |
Revista: | Química Nova |
É parte de: | Volume 36, Número 5, Pags. 628-633 |
Abstract: | We investigated the phenolic constituents and antioxidant activity of geopropolis from two species of stingless Amazonian bees, Melipona interrupta and Melipona seminigra. The chemical investigation of geopropolis from Melipona interrupta led to the isolation of 5,7,4'-trihydroxyflavonone, 3,5,6,7,4'-pentahydroxyflavonol, naringenine-4'-O-β-D-glucopyranoside and myricetin-3-O-β-D-glucopyranoside. Their structures were assigned based on spectroscopic analyses, including two-dimensional NMR techniques. Antioxidant activity of methanol and ethanol extracts of M. interrupta and M. seminigra were measured using the 1,2-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging assay. This is also the first work reporting the chemical investigation of stingless bee species from the Amazonian region. |
DOI: | 10.1590/S0100-40422013000500003 |
Aparece nas coleções: | Artigos |
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