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Simplified, high yielding extraction of xylan/xylo-oligosaccharides from palmaria palmata: the importance of the algae preservation treatment

2025-07-29Research article Open access
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dc.contributor.authorCoelho, Diogo
dc.contributor.authorCosta, Diogo Félix
dc.contributor.authorBarroca, Mário
dc.contributor.authorCunha, Sara Alexandra
dc.contributor.authorPintado, Maria Manuela
dc.contributor.authorAbreu, Helena
dc.contributor.authorMartins, Margarida
dc.contributor.authorCollins, Tony
dc.date.accessioned2025-08-13T08:52:32Z
dc.date.available2025-08-13T08:52:32Z
dc.date.issued2025-07-29
dc.description.abstractThe complex plant cell wall heteropolysaccharide xylan, and its breakdown products xylo-oligosaccharides and xylose, are value-added compounds with a plethora of potential applications in diverse areas. They are nonetheless currently poorly exploited, with a major bottleneck being the unavailability of efficient, low-cost, high-yield production processes. The major objective of the present study is to identify and characterise a high-yield process for the preparation of highly pure xylan/XOS products from the macroalga Palmaria palmata. Currently, most xylan is extracted from land-sourced lignocellulosic feedstocks, but we take advantage of the high xylan content, xylan aqueous solubility, lignin-free nature, weakly linked cell wall matrix, and sustainability of the macroalga to identify a simple, sustainable, high-yield, novel-xylan-structure extraction process. This is composed of five steps: alga oven drying, milling, aqueous extraction, centrifugation, and dialysis, and we show that the alga preservation step plays a critical role in component extractability, with oven drying at high temperatures, ~100 °C, enhancing the subsequent aqueous extraction process, and providing for xylan yields as high as 80% of a highly pure (~90%) xylan product. The process developed herein and the insights gained will promote a greater availability of these bioactive compounds and open up their application potential.eng
dc.identifier.doi10.3390/md23080302
dc.identifier.issn1660-3397
dc.identifier.otherc0020e59-0118-431b-b564-78b437483ac5
dc.identifier.urihttp://hdl.handle.net/10400.14/54492
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAlgae pretreatment
dc.subjectExtraction time
dc.subjectPalmaria palmata
dc.subjectProcess temperature
dc.subjectXylan
dc.titleSimplified, high yielding extraction of xylan/xylo-oligosaccharides from palmaria palmata: the importance of the algae preservation treatmenteng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.titleMarine Drugs
oaire.citation.volume23
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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