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Unlocking biochemical profile of chaetoceros calcitrans, cylindrotheca fusiformis, and nannofrustulum shiloi (Bacillariophyta) for nutritional and added-value applications

2025-07Artigo científico Acesso restrito
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datacite.subject.sdg02:Erradicar a Fome
datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorMoreira, Ana S. P.
dc.contributor.authorRocha, Helena R.
dc.contributor.authorAveiro, Susana
dc.contributor.authorFerreira, Andreia S.
dc.contributor.authorOliveira, Kayane
dc.contributor.authorConde, Alexandra
dc.contributor.authorCoelho, Marta
dc.contributor.authorRodrigues, Alexandre M. C.
dc.contributor.authorCoelho, Natacha
dc.contributor.authorPereira, Hugo
dc.contributor.authorGomes, Ana
dc.contributor.authorPintado, Manuela
dc.contributor.authorNunes, Cláudia
dc.contributor.authorCoimbra, Manuel A.
dc.contributor.authorVentura, Sónia P.M.
dc.contributor.authorDomingues, Rosário
dc.contributor.authorLopes, Diana
dc.date.accessioned2026-04-13T09:31:31Z
dc.date.available2026-04-13T09:31:31Z
dc.date.issued2025-07
dc.description.abstractDiatoms have garnered attention as sources of natural bioactive compounds, making them attractive for developing high-value products for different biotechnological ends, particularly for nutritional applications. Despite their potential, the chemical composition of industrially produced biomass remains largely underexplored. In this context, this study was focused on a thorough characterisation of the biochemical profile of three marine diatom species produced outdoors in photobioreactors: Chaetoceros calcitrans, Cylindrotheca fusiformis, and Nannofrustulum shiloi. The proximal composition of biomasses accounted for 29–35 % ashes, 21–30 % proteins, 7–14 % lipids, 3–7 % carbohydrates, and 0.4–2 % pigments. Each species contained >35 % of essential amino acids, mainly alanine and leucine. Distinct soluble protein and peptide size distribution patterns were observed among the three species. Galactose (26–45 mol%), uronic acids (20–29 mol%), and glucose (3–21 mol %) were the main sugar residues found in all species. Galactose was mainly derived from floridoside and related compounds. The most abundant fatty acid was 20:5 n-3 in C. calcitrans (18 %), whereas in C. fusiformis was 16:1 n-7 (20 %) and 16:0 in N. shiloi (21 %). Lipidomics revealed 325 species of glycolipids, phospholipids, betaine lipids, sphingolipids, fatty amides, and sterol lipids, also with a distinct distribution along the lipid classes. C. calcitrans was the richest in chlorophylls (14 mg.g− 1 ) and carotenoids (8 mg.g− 1 ). In mineral analysis, calcium showed the highest difference, 66 mg.g− 1 in N. shiloi, 27 mg.g− 1 in C. fusiformis, and 4 mg.g− 1 in C. calcitrans. Overall, this study highlights the nutritional potential of industrially produced diatoms, with distinct chemical profile that can be explored for target applications.eng
dc.identifier.doi10.1016/j.algal.2025.104080
dc.identifier.issn2211-9264
dc.identifier.urihttp://hdl.handle.net/10400.1/28651
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationCentre for Environmental and Marine Studies
dc.relationCentre for Environmental and Marine Studies
dc.relationCentre for Environmental and Marine Studies
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO – Aveiro Institute of Materials
dc.relation.ispartofAlgal Research
dc.rights.uriN/A
dc.subjectMicroalgae
dc.subjectBacillariophytes
dc.subjectLipidomics
dc.subjectMinerals
dc.subjectSugars
dc.subjectPigments
dc.subjectAmino acids
dc.titleUnlocking biochemical profile of chaetoceros calcitrans, cylindrotheca fusiformis, and nannofrustulum shiloi (Bacillariophyta) for nutritional and added-value applicationseng
dc.typejournal article
dspace.entity.typePublication
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oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO – Aveiro Institute of Materials
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0006%2F2020/PT
oaire.citation.startPage104080
oaire.citation.titleAlgal Research
oaire.citation.volume89
oaire.fundingStream6817 - DCRRNI ID
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