Produção Nacional
Revisado por pares
Antioxidants extraction from Pinhão ( Araucaria angustifolia (Bertol.) Kuntze) coats and application to zein films
2017; Elsevier BV; Volume: 15; Linguagem: Inglês
10.1016/j.fpsl.2017.10.006
ISSN2214-2894
AutoresTânia Barbedo De Freitas, Carlos Henrique Koslinski Santos, Marcos Vieira da Silva, Marianne Ayumi Shirai, María Inês Días, Lillian Barros, Maria Filomena Barreiro, Isabel C.F.R. Ferreira, Odinei Hess Gonçalves, Fernanda Vitória Leimann,
Tópico(s)Agricultural and Food Sciences
ResumoSeeds from Araucaria angustifolia (Bertol.) Kuntze are consumed after cooking and their coats discarded. Both coats and the cooking water present phenolic compounds, which may be used to improve mechanical properties and provide antioxidant characteristics to films. The objective of this work was to obtain and pinhão coat extracts and to apply these polyphenolic-rich extracts in zein films. Phenolic compounds composition, extraction yield and antioxidant activity (DPPH, ABTS and FRAP) of the extracts were determined. The most abundant molecules present in the hydroethanolic extract were (+)-catechin and an (epi)catechin dimer, whereas protocatechuic acid were predominant in the both cooking water and ethanolic extracts. Glass transition temperature of zein was not found in the extract-loaded films. Morphological changes were also caused by the presence of the extracts yielding smoother surfaces. The extracts added to zein films led to a three-fold increase in tensile strength (from 5.80 MPa to 17.65 MPa) and two-fold increase in the elongation at break (from 1.60% to 3.18%).
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