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metadata.artigo.dc.title: Characterisation and valorisation of the bark of Myrcia eximia DC. trees from the Amazon rainforest as a source of phenolic compounds
metadata.artigo.dc.creator: Araujo, Elesandra da Silva
Mota, Graciene da Silva
Lorenço, Mário Sérgio
Zidanes, Uasmim Lira
Silva, Lucas Rodrigues da
Silva, Eliandra Pereira
Ferreira, Vanuzia Rodrigues Fernandes
Cardoso, Maria das Graças
Mori, Fábio Akira
metadata.artigo.dc.subject: Bark characterisation
Condensed tannins
Natural antioxidant
Phenolic compounds
Structural analysis
Espécies florestais
Casca da árvore - Caracterização
Taninos condensados
Antioxidante natural
Compostos fenólicos
Floresta - Análise estrutural
metadata.artigo.dc.publisher: De Gruyter Mar-2020
metadata.artigo.dc.identifier.citation: ARAUJO, E. da S. et al. Characterisation and valorisation of the bark of Myrcia eximia DC. trees from the Amazon rainforest as a source of phenolic compounds. Holzforschung, [S. I.], Mar. 2020. DOI:
metadata.artigo.dc.description.abstract: The bark of the tree species Myrcia eximia DC., which occurs in secondary forests in the Brazilian Amazon, is described for the first time. The aim was to provide a broad knowledge of its composition, to add value, and to direct uses to the bark of this species based on its polyphenolic content and antioxidant capacity. The bark is formed by conducting phloem, nonconducting phloem, and rhytidome. In addition, dead phloem occurs between the periderms. The average chemical composition of the bark was 45.6% total extractives, 1.4% suberin, 1.7% ash, and 21.1% lignin. The ethanol-water extract had a high content of flavonoids and condensed tannins [300.8 and 877.3 mg catechin equivalents (CE) g−1 of the extract, respectively]. High-performance liquid chromatography (HPLC) was used to quantify the presence of rutin, quercetin, and gallic, ferulic, and o-coumaric acids. The bark extract showed strong 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH) free radical scavenging activity, which was superior to that of the commercial antioxidant butylated hydroxytoluene (BHT), with an IC50 of 85.2 μg mL−1. Based on these results, it is evident that the bark of M. eximia from the Brazilian Amazon rainforest is a new and potential natural source of phenolic compounds and antioxidants, and its extracts can be used in the food and pharmaceutical industry and in various condensed tannin-based products.
metadata.artigo.dc.language: en
Appears in Collections:DCF - Artigos publicados em periódicos
DQI - Artigos publicados em periódicos

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