2026-04-17T08:02:36Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/52552021-11-02T12:01:59Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

Alonso Riaño, Patricia aad9756c-ad87-4f31-ba02-459668ce3469 500 Sanz Díez, Mª Teresa 530 500 Blanco, Beatriz c517a140-27d4-49da-9df9-8b5e6e7e3190 500 Beltrán Calvo, Sagrario 57 500 Trigueros Andrés, Ester 557 500 Benito Román, Oscar 59 500 0000-0002-4418-0045 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. Junta de Castilla y León (JCyL) and ERDF for financial support of project BU301P18, and O. Benito-Román post-doctoral contract. To JCyL and ESF for the predoctoral contracts of E. Trigueros and P. Alonso-Riaño and for the contracts of D. Benito-Bedoya and D. M. Aymara-Caiza through the YEI program. application/pdf eng MDPI Antioxidants. 2020, V. 9, n. 3, 265 https://doi.org/10.3390/antiox9030265 info:eu-repo/grantAgreement/JCyL/BU301P18 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess brewer’s spent grains ultrasound assisted extraction polyphenol compound extractives concentration Ingeniería química Chemical engineering Water Ultrasound-Assisted Extraction of Polyphenol Compounds from Brewer’s Spent Grain: Kinetic Study, Extract Characterization, and Concentration info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Antioxidants 9 3 265 ORIGINAL Alonso-antioxidants_2020.pdf Alonso-antioxidants_2020.pdf application/pdf 5710328 https://riubu.ubu.es/bitstream/10259/5255/1/Alonso-antioxidants_2020.pdf e1abbcd42e3254408e5de10add5fc65d MD5 1 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 908 https://riubu.ubu.es/bitstream/10259/5255/2/license_rdf 0175ea4a2d4caec4bbcc37e300941108 MD5 2 LICENSE license.txt license.txt text/plain; charset=utf-8 998 https://riubu.ubu.es/bitstream/10259/5255/3/license.txt aa90105e1c90a1b4fe810649aa967b7d MD5 3 THUMBNAIL Alonso-antioxidants_2020.pdf.jpg Alonso-antioxidants_2020.pdf.jpg IM Thumbnail image/jpeg 3398 https://riubu.ubu.es/bitstream/10259/5255/4/Alonso-antioxidants_2020.pdf.jpg 864cab8b40ae024929dd9d750f836a45 MD5 4 TEXT Alonso-antioxidants_2020.pdf.txt Alonso-antioxidants_2020.pdf.txt Extracted text text/plain 64129 https://riubu.ubu.es/bitstream/10259/5255/5/Alonso-antioxidants_2020.pdf.txt 599b274b38306f40dc519041df5e083f MD5 5 10259/5255 oai:riubu.ubu.es:10259/5255 2021-11-02 13:01:59.872 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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