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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/31316

    Título
    Microwave pretreatment to improve extraction efficiency and polyphenol extract richness from grape pomace. Effect on antioxidant bioactivity
    Autor
    Álvarez Martín, AnaAutoridad UVA
    Poejo, Joana
    Duarte, Catarina M.M.
    Cocero Alonso, María JoséAutoridad UVA Orcid
    Mato Chaín, Rafael BartoloméAutoridad UVA Orcid
    Año del Documento
    2017
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Food and Bioproducts Processing 106, 162-170
    Resumo
    Microwave assisted extraction advantages are widely recognised. However, its implementa-tion at industrial scale is restricted due to microwave limitations. In this work, a microwavepretreatment is proposed as an easy scale-up alternative for grape pomace polyphenolextraction, especially for anthocyanins. The double effect of this pretreatment on extractionyield and on product richness is assessed. Microwaves accelerate the extraction kineticsof most compounds, but their effect on polyphenols is more pronounced than in othersubstances (like sugars and fibres). These differentiated rates are exploited to improve thepolyphenol richness of the final dry product. By selecting the appropriate operating condi-tions, polyphenol yield was increased by 57% and, simultaneously, dry product richness wasenhanced by 32%. Also, anthocyanin extraction boost was remarkable. Its content in the finaldry product was 85% higher than the one obtained without the microwave pretreatment.The cellular bioactivity of these extracts was improved by 83% and 133%.
    Palabras Clave
    Microwave-pressure pretreatment
    polyphenols;
    ISSN
    0960-3085
    Revisión por pares
    SI
    DOI
    10.1016/j.fbp.2017.09.007
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0960308517301220
    Propietario de los Derechos
    info:eu-repo/semantics/openAccess
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/31316
    Derechos
    openAccess
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    Universidad de Valladolid

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