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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5255

    Título
    Water Ultrasound-Assisted Extraction of Polyphenol Compounds from Brewer’s Spent Grain: Kinetic Study, Extract Characterization, and Concentration
    Autor
    Alonso Riaño, PatriciaUBU authority Orcid
    Sanz Díez, Mª TeresaUBU authority Orcid
    Blanco Alcalde, BeatrizUBU authority Orcid
    Beltrán Calvo, SagrarioUBU authority Orcid
    Trigueros Andrés, EsterUBU authority Orcid
    Benito Román, OscarUBU authority Orcid
    Publicado en
    Antioxidants. 2020, V. 9, n. 3, 265
    Editorial
    MDPI
    Fecha de publicación
    2020-03
    DOI
    10.3390/antiox9030265
    Abstract
    Brewer’s spent grain (BSG) was chemically characterized obtaining 52.1% of carbohydrates, 17.8% protein, 5.9% lipids, 13.5% insoluble lignin and 24.3% of water-soluble extractives. This work has been focused on the study of polyphenol extraction of the extractive fraction by water ultrasound-assisted extraction. Selected extraction conditions were 47 °C and 21.7 mL water/gdry-BSG. The effect of solvent polarity on polyphenol extraction was studied by using ethanol aqueous mixtures, from 20% to 100% ethanol. The kinetics of polyphenol extraction have been fitted to the power law and the Weibull models yielding mean values of the root mean square deviation lower than 7.5%. Extracts have been characterized in terms of quantification of individual phenolic compounds by HPLC-DAD and protein and sugar soluble fractions (glucose, xylose, and arabinose). Polyphenol profile has been compared with other hydrolytic techniques, such as acid, basic and enzymatic hydrolysis, showing that ultrasound was not as effective as basic hydrolysis to release the phenolic acids esterified to the cell wall. A further centrifuge ultrafiltration concentration step was able to yield a retentate enriched in the protein fraction while individual phenolic compounds where mainly transferred to the permeate.
    Palabras clave
    brewer’s spent grains
    ultrasound assisted extraction
    polyphenol compound
    extractives concentration
    Materia
    Ingeniería química
    Chemical engineering
    URI
    http://hdl.handle.net/10259/5255
    Versión del editor
    https://doi.org/10.3390/antiox9030265
    Collections
    • Artículos BIOIND
    Atribución 4.0 Internacional
    Documento(s) sujeto(s) a una licencia Creative Commons Atribución 4.0 Internacional
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