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Biological and physico-chemical properties of lobosphaera sp. Packed in metallized polyethylene terephthalate/polyethylene (PETmet/PE)

2025-08-06Research article Open access
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dc.contributor.authorMartins, Valter F. R.
dc.contributor.authorAlves, Ana J.
dc.contributor.authorPoças, Fátima
dc.contributor.authorPintado, Manuela
dc.contributor.authorMorais, Rui M. S. C.
dc.contributor.authorMorais, Alcina M. M. B.
dc.date.accessioned2025-10-09T09:19:38Z
dc.date.available2025-10-09T09:19:38Z
dc.date.issued2025-08-06
dc.description.abstractThis study evaluated the effects of different storage conditions, varying in light exposure, relative humidity (RH), and packaging materials, on the physicochemical stability of Lobosphaera sp. biomass, the retention of bioactive compounds, and the bioactivity of its extracts. Under light and 75% RH, the biomass absorbed moisture over time, reaching 0.779 +/- 0.003 g/g dry weight (DW) after three months. This was accompanied by a decline in luminosity, chroma, and hue values. In contrast, samples stored under other conditions showed minimal changes, indicating that high humidity, combined with light exposure, compromises biomass stability. Packaging in metalized polyethylene terephthalate (PETmet/PE) effectively preserved the water content, color, and carotenoid levels during a two-month storage period. Bioactive compounds extracted via hydroethanolic ultrasound-assisted extraction yielded 15.48 +/- 1.35% DW. Total phenolic content (TPC) of the extracts declined over time in both PETmet/PE and low-density polyethylene (LDPE) packaging, though the decrease was less pronounced in PETmet/PE. Antioxidant activity, assessed via the ABTS assay, remained stable, regardless of storage duration or packaging. Antimicrobial activity of the extract decreased over time but remained more effective against Gram-positive bacteria (Staphylococcus aureus, Bacillus cereus, and Listeria monocytogenes), with PETmet/PE packaging better preserving antimicrobial efficacy than LDPE. These findings underscore the importance of optimized storage conditions and packaging for maintaining the quality and bioactivity of Lobosphaera sp. biomass and its extracts.eng
dc.identifier.citationMartins, V. F. R., Alves, A. J., Poças, F., & Pintado, M. et al. (2025). Biological and physico-chemical properties of lobosphaera sp. Packed in metallized polyethylene terephthalate/polyethylene (PETmet/PE). Phycology, 5(3), Article 35. https://doi.org/10.3390/phycology5030035
dc.identifier.doi10.3390/phycology5030035
dc.identifier.eid105017286067
dc.identifier.issn2673-9410
dc.identifier.othera3332739-1029-4b70-b409-31be87a66de0
dc.identifier.urihttp://hdl.handle.net/10400.14/55170
dc.identifier.wos001579812100001
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAntimicrobial activity
dc.subjectAntioxidant activity
dc.subjectCarotenoids
dc.subjectColor
dc.subjectLobosphaera
dc.subjectMetallized polyethylene terephthalate
dc.subjectMicroalgae
dc.subjectPackaging
dc.subjectPolyethylene
dc.subjectStorage
dc.titleBiological and physico-chemical properties of lobosphaera sp. Packed in metallized polyethylene terephthalate/polyethylene (PETmet/PE)eng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue3
oaire.citation.titlePhycology
oaire.citation.volume5
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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