Show simple item record

dc.contributor.authorValdés, Arantzazu
dc.contributor.authorMondragón Otamendi, Gurutz
dc.contributor.authorGarrigós, María Carmen
dc.contributor.authorEceiza Mendiguren, María Aranzazu
dc.contributor.authorJiménez Migallón, Alfonso
dc.date.accessioned2023-04-20T17:53:21Z
dc.date.available2023-04-20T17:53:21Z
dc.date.issued2023-01
dc.identifier.citationFrontiers in Nutrition 9 : (2023) // Article ID 1071754es_ES
dc.identifier.issn2296-861X
dc.identifier.urihttp://hdl.handle.net/10810/60820
dc.description.abstractAlmond (Prunus amygdalus) is one of the most common tree nuts on a worldwide basis. This nut is highly regarded in the food and cosmetic industries. However, for all these applications, almonds are used without their shell protection, which is industrially removed contributing approximately 35-75% of the total fruit weight. This residue is normally incinerated or dumped, causing several environmental problems. In this study, a novel cellulose nanocrystal (CNCs) extraction procedure from almond shell (AS) waste by using microwave-assisted extraction was developed and compared with the conventional approach. A three-factor, three-level Box-Behnken design with five central points was used to evaluate the influence of extraction temperature, irradiation time, and NaOH concentration during the alkalization stage in crystallinity index (CI) values. A similar CI value (55.9 +/- 0.7%) was obtained for the MAE process, comprising only three stages, compared with the conventional optimized procedure (55.5 +/- 1.0%) with five stages. As a result, a greener and more environmentally friendly CNC extraction protocol was developed with a reduction in time, solvent, and energy consumption. Fourier transform infrared (FTIR) spectra, X-ray diffractogram (XRD), atomic force microscopy (AFM), and scanning electron microscopy (SEM) images, and thermal stability studies of samples confirmed the removal of non-cellulosic components after the chemical treatments. TEM images revealed a spherical shape of CNCs with an average size of 21 +/- 6 nm, showing great potential to be used in food packaging, biological, medical, and photoelectric materials. This study successfully applied MAE for the extraction of spherical-shaped CNCs from AS with several advantages compared with the conventional procedure, reducing costs for industry.es_ES
dc.description.sponsorshipThis work was supported by Conselleria de Educacion (Spain) (APOSTD/2016/093 Postdoctoral Research Training Grant), the Spanish Ministry of Economy, Industry and Competitiveness (MAT2017-84909-C2-1-R), and the University of the Basque Country (UPV/EHU) (GIU18-216).es_ES
dc.language.isoenges_ES
dc.publisherFrontiers Mediaes_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/MAT2017-84909-C2-1-Res_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subjectPrunus amygdaluses_ES
dc.subjectalmond shell wastees_ES
dc.subjectmicrowave-assisted extractiones_ES
dc.subjectcellulose nanocrystalses_ES
dc.subjectexperimental designes_ES
dc.subjectvalorizationes_ES
dc.titleMicrowave-assisted extraction of cellulose nanocrystals from almond (Prunus amygdalus) shell wastees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holder© 2023 Valdés, Mondragon, Garrigós, Eceiza and Jiménez. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.es_ES
dc.rights.holderAtribución 3.0 España*
dc.relation.publisherversionhttps://www.frontiersin.org/articles/10.3389/fnut.2022.1071754/fulles_ES
dc.identifier.doi10.3389/fnut.2022.1071754
dc.departamentoesIngeniería química y del medio ambientees_ES
dc.departamentoeuIngeniaritza kimikoa eta ingurumenaren ingeniaritzaes_ES


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

© 2023 Valdés, Mondragon, Garrigós, Eceiza and Jiménez. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Except where otherwise noted, this item's license is described as © 2023 Valdés, Mondragon, Garrigós, Eceiza and Jiménez. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.