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Modification of acorn starch structure and properties by high hydrostatic pressure

2025-06-01Capítulo de livro Acesso aberto
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dc.contributor.authorCastro, Luís M. G.
dc.contributor.authorCaço, Ana I.
dc.contributor.authorPereira, Carla F.
dc.contributor.authorSousa, Sérgio C.
dc.contributor.authorBrassesco, María E.
dc.contributor.authorMachado, Manuela
dc.contributor.authorRamos, Óscar L.
dc.contributor.authorAlexandre, Elisabete M. C.
dc.contributor.authorSaraiva, Jorge A.
dc.contributor.authorPintado, Manuela
dc.date.accessioned2025-09-08T08:35:06Z
dc.date.available2025-09-08T08:35:06Z
dc.date.issued2025-06-01
dc.description.abstractDespite being rich in starch, over half of acorn production is undervalued. High hydrostatic pressure was used to modify the properties of Q. pyrenaica (0.1 and 460 MPa for 20 min) and Q. robur (0.1 and 333 MPa for 17.4 min) acorn starches to obtain high-valued ingredients. Pressure significantly altered the span distribution and heterogeneity of the acorn starch granules depending on the species, but their morphology was unaffected. Pressurization increased the amylose/amylopectin ratio and damaged starch contents, but the effect was more prominent in Q. pyrenaica than in Q. robur. However, the polymorphism, relative crystallinity, gelatinization temperatures, and enthalpies were preserved. The pressure effect on the starch properties depended on the property and species. The solubility, swelling power, and acorn gels’ resistance towards deformation for both species decreased after pressurization. For Q. pyrenaica starch, the in vitro digestibility increased, but the pseudoplastic behavior decreased after pressurization. No differences were seen for Q. robur. Regarding the commercial starch, acorn starches had lower gelatinization temperatures and enthalpies, lower in vitro digestibility, lower resistance towards deformation, superior pseudoplastic behavior, and overall higher solubility and swelling power until 80 ?C. This encourages the usage of acorn starches as a new food ingredient.eng
dc.identifier.citationCastro, L. M. G., Caço, A. I., Pereira, C. F., & Sousa, S. C. et al. (2025). Modification of acorn starch structure and properties by high hydrostatic pressure. In E. Gallo, & C. Diaferia (Eds.), Hydrogelated matrices: structural, functional and applicative aspects (pp. 113-132). MDPI.
dc.identifier.isbn9783725843602
dc.identifier.isbn9783725843596
dc.identifier.otherc80553ed-d9e6-4c5e-b2b7-da01829a3e00
dc.identifier.urihttp://hdl.handle.net/10400.14/54707
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAcorn
dc.subjectHigh hydrostatic pressure
dc.subjectModification
dc.subjectProperties
dc.subjectStarch
dc.titleModification of acorn starch structure and properties by high hydrostatic pressureeng
dc.typebook part
dspace.entity.typePublication
oaire.citation.endPage132
oaire.citation.startPage113
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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