2026-04-17T07:49:01Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/52552021-11-02T12:01:59Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
Repositorio Institucional de la Universidad de Burgos
author
Alonso Riaño, Patricia
author
Sanz Díez, Mª Teresa
author
Blanco, Beatriz
author
Beltrán Calvo, Sagrario
author
Trigueros Andrés, Ester
author
Benito Román, Oscar
2020-04-03T18:18:48Z
2020-04-03T18:18:48Z
2020-03
http://hdl.handle.net/10259/5255
10.3390/antiox9030265
2076-3921
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.
eng
Atribución 4.0 Internacional
brewer’s spent grains
ultrasound assisted extraction
polyphenol compound
extractives concentration
Water Ultrasound-Assisted Extraction of Polyphenol Compounds from Brewer’s Spent Grain: Kinetic Study, Extract Characterization, and Concentration
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/5255/1/Alonso-antioxidants_2020.pdf
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https://riubu.ubu.es/bitstream/10259/5255/5/Alonso-antioxidants_2020.pdf.txt
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Alonso-antioxidants_2020.pdf.txt