Microwave-assisted extraction in goji berries: effect on composition and bioactivity, evaluated through conventional and nonconventional methodologies

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Carvalho, AP (Autor) Outra; Mendes, M (Autor) Outra; Moreira, MM (Autor) Outra; Cruz, D (Autor) Outra; Magalhaes, JMCS (Autor) Outra; Barroso, MF (Autor) Outra; Ramalhosa, MJ (Autor) Outra; Duarte, A (Autor) Outra; Luis F Guido (Autor) FCUP; Gomes, AM (Autor) Outra; Matos, CD (Autor) Outra

Revista

Título: International Journal of Food Science and Technology

Vol. 51

Páginas: 1401-1408

ISSN: 0950-5423

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 7 Citações

Outras Informações

ID Authenticus: P-00K-MTR

DOI: 10.1111/ijfs.13105

Abstract (EN): This study aimed to evaluate the effect of microwave-assisted extraction (MAE) parameters on the composition and bioactivity of goji (Lycium barbarum) extracts. Extracts were obtained under a central composite design combination of experimental conditions, and characterised through HPLC-DAD; their bioactive capacity was ascertained for antimicrobial and antioxidant capacity, the later by spectrophotometric [2,2-azinobis (3- ethylbenzothiazoline-6-sulfonic acid) diammonium salt-radical scavenging activity assay -413-748 mg ascorbic acid equivalents/100 g DW and oxygen radical absorbance capacity -1901-2292 mg trolox equivalents/100 g DW] and electrochemical (DNA-based sensor -3571-6602 mg ascorbic acid/100 g DW) methods. The quantitative profile of phenolic compounds was strongly dependent on MAE conditions. Significant correlations were found between the presence of several flavonoids and solvent composition, as well as between phenolic acids with methoxy group and the response to DNA-based sensor. Results may improve targeted extractions for specific compounds, leading to the achievement of extracts richer in antioxidant capacity, as well as in the tailoring of the biosensor response sensitivity to the composition of the extracts under analysis.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8