2026-04-18T23:29:49Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/91432024-07-16T11:52:52Zcom_10259_9397com_10259_5087com_10259_2728col_10259_9398

Blanco Alcalde, Beatriz 597 600 0000-0002-1703-6718 Ruiz Pérez, María Olga 503 600 0000-0003-0399-092X Fernández González, Esther 8dd28228-d41f-43b9-b30b-bd2221d1a08e 600 Universidad de Burgos. Departamento de Biotecnología y Ciencia de los Alimentos d7ac09bf-b8c0-4b30-833f-0672b8f2f022 600 2024-05-07T10:55:53Z 2024-05-07T10:55:53Z 2023-06 http://hdl.handle.net/10259/9143 Corn is presently one of the most expensively cultivated cereals worldwide, resulting in significant agricultural solid residues. The corncob waste is considered a by-product due to its phenolic fraction rich in phenolic acids and flavonoids that could be substitute synthetic functional additives in various food and pharmaceutical applications. This study has been focused on investigating different extraction processes and operating conditions to recover the phenolic fraction from corncob waste, followed by an identification study to valorise the final extracts. The experiments were conducted using bath extraction with rotary agitation and ultrasound-assisted extraction. The solvent was ethanol, water, and various ethanol-water mixtures. Ultrasonication has been more effective than rotatory agitation, ensuring higher extraction yields in a much shorter contact time. The presence of kaempferol, p-coumaric acid and ethyl-ferulate has been identified in the phenolic profile of all extracts from the treatment of corncob waste with ethanol solvents. The response surface methodology with a Box-Behnken desing (BBD) has been employed to analyse the combined effect of contact time, solid waste amount and ethanol fraction in the solvent on the extraction efficiency. Kinetic experiments were also performed with the optimal solvent selected from the BBD to examine maximising extraction of p-coumaric acid, kempferol and ethyl-ferulate. application/pdf spa http://creativecommons.org/licenses/by-nc-nd/4.0/ Este documento está sujeto a una licencia de uso Creative Commons, por la cual está permitido hacer copia, distribuir y comunicar públicamente la obra siempre que se cite al autor original y no se haga de él uso comercial ni obra derivada info:eu-repo/semantics/openAccess Corncob waste Phenolic compounds Bath extraction Ultrasound-assisted extraction Ingeniería química Alimentos Chemical engineering Food Estudio de la extracción de compuestos fenólicos de residuos agrarios de mazorca de maíz mediante la metodología de superficie de respuesta info:eu-repo/semantics/bachelorThesis info:eu-repo/semantics/acceptedVersion THUMBNAIL Fernandez_Gonzalez_Esther-TFG.pdf.jpg Fernandez_Gonzalez_Esther-TFG.pdf.jpg IM Thumbnail image/jpeg 4213 https://riubu.ubu.es/bitstream/10259/9143/3/Fernandez_Gonzalez_Esther-TFG.pdf.jpg 21e1a844e69aa62679e88e5f5a724bd5 MD5 3 LICENSE license.txt license.txt text/plain; charset=utf-8 1362 https://riubu.ubu.es/bitstream/10259/9143/2/license.txt 5d013bfa6e473ff0db22cd82a4d71a70 MD5 2 ORIGINAL Fernandez_Gonzalez_Esther-TFG.pdf Fernandez_Gonzalez_Esther-TFG.pdf application/pdf 6389513 https://riubu.ubu.es/bitstream/10259/9143/1/Fernandez_Gonzalez_Esther-TFG.pdf 70f9986bd4beed1ff4eb1d07ae784344 MD5 1 10259/9143 oai:riubu.ubu.es:10259/9143 2024-07-16 13:52:52.646 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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