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Microalgae protein: a comparison between spray-dryed and frozen paste cells

2026-10Artigo científico Acesso aberto
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datacite.subject.sdg02:Erradicar a Fome
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorMoreira, Catarina
dc.contributor.authorNunes, Rafaela
dc.contributor.authorKholany, Mariam
dc.contributor.authorPereira, Hugo
dc.contributor.authorTeixeira, José A.
dc.contributor.authorFerreira-Santos, Pedro
dc.contributor.authorRocha, Cristina M.R.
dc.date.accessioned2026-06-25T11:48:22Z
dc.date.available2026-06-25T11:48:22Z
dc.date.issued2026-10
dc.description.abstractThe need for sustainable protein substitutes is being driven by the growing global population. Because of their high protein content and environmental sustainability, microalgae are a viable source. In this study, proteins extracted from frozen paste and spray-dried biomass from Nannochloropsis oceanica and Tetraselmis chui were studied. High-pressure homogenization, followed by ultrafiltration (non-purified, NPS) and ammonium sulfate precipitation (purified, PS), was used to process the protein extracts. PS extracts showed higher protein concentrations, reaching approximately three-fold higher levels than NPS in spray-dried N. oceanica and about 2.7-fold higher in frozen paste samples, while frozen paste T. chui exhibited a 2.6-fold increase. Spectroscopic and chromatographic analyses revealed that frozen paste extracts preserved a greater proportion of native protein structures and displayed higher hydrophobic site exposure, whereas spraydrying and purification reduced α-helix content and promoted protein aggregation. Despite their lower protein concentration, frozen paste NPS extracts exhibited more favorable structural characteristics that may support improved techno-functional performance. These results highlight the importance of selecting processing conditions based on intended applications. Future food formulations could benefit greatly from the use of microalgal proteins, especially those derived from frozen biomass, as adaptable and sustainable ingredients.eng
dc.description.sponsorshipSFRH/BD/07527/2020
dc.identifier.doi10.1016/j.foodhyd.2026.112781
dc.identifier.issn0268-005X
dc.identifier.urihttp://hdl.handle.net/10400.1/29145
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationAssociate Laboratory on Biotechnology, Bioengineering and microELectromechanical Systems
dc.relation.ispartofFood Hydrocolloids
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMicroalgae
dc.subjectNannochloropsis
dc.subjectTetraselmis
dc.subjectProtein
dc.subjectSpray-drying
dc.subjectFrozen cells
dc.subjectAmmonium sulfate purification
dc.titleMicroalgae protein: a comparison between spray-dryed and frozen paste cellseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberLA/P/0029/2020
oaire.awardTitleAssociate Laboratory on Biotechnology, Bioengineering and microELectromechanical Systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0029%2F2020/PT
oaire.citation.startPage112781
oaire.citation.titleFood Hydrocolloids
oaire.citation.volume179
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameKholany
person.familyNamePereira
person.givenNameMariam
person.givenNameHugo
person.identifier282781
person.identifier.ciencia-id331E-84FD-2F34
person.identifier.orcid0000-0002-6279-2053
person.identifier.orcid0000-0002-1369-2099
person.identifier.ridE-9360-2015
person.identifier.scopus-author-id54080259900
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublication129a33b7-707c-4d4a-9cc9-a62f939fa217
relation.isAuthorOfPublicationebcb2180-5235-4502-b562-cd1e7786e6f9
relation.isAuthorOfPublication.latestForDiscoveryebcb2180-5235-4502-b562-cd1e7786e6f9
relation.isProjectOfPublicationece8d4a0-fc62-4de9-a509-8dca57065a53
relation.isProjectOfPublication.latestForDiscoveryece8d4a0-fc62-4de9-a509-8dca57065a53

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