Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/91439

TítuloRed seaweed biorefinery: The influence of sequential extractions on the functional properties of extracted agars and porphyrans
Autor(es)Gomes-Dias, Joana S.
Teixeira, Catarina Isabel Guedes
Teixeira, José A.
Rocha, Cristina M.R.
Palavras-chaveMacroalgae
Hydrocolloids
Rheological behaviour
DataFev-2024
EditoraElsevier 1
RevistaInternational Journal of Biological Macromolecules
CitaçãoGomes-Dias, Joana S.; Teixeira-Guedes, Catarina Isabel; Teixeira, José A.; Rocha, Cristina M. R., Red seaweed biorefinery: The influence of sequential extractions on the functional properties of extracted agars and porphyrans. International Journal of Biological Macromolecules, 257, Part 1(128479), 2024
Resumo(s)Red seaweeds are exploited for their hydrocolloids, but other fractions are usually overlooked. In a novel approach, this study aimed to evaluate cold-water (CWE), ethanolic (EE), and alkaline (SE) extractions, alone and in sequence, to simultaneously: i) decrease the hydrocolloid extraction waste (valorizing bioactive side-streams and/or increasing extraction yield); and ii) increase the hydrocolloids' texturizing properties. It is the first time these extractions' synergetic and/or antagonistic effects will be accessed. For Porphyra dioica, a combination of CWE and EE was optimal: a positive influence on the melting temperature (increasing 5 °C to 74 °C) and sulphate content (a 3-fold reduction to 5 %) was observed, compared to a direct porphyran extraction. The same was observed for Gracilaria vermiculophyla, recovering two additional bioactive fractions without impacting the hydrocolloid's extraction (agar with 220 g/cm2 gelling strength and 14 % yield was obtained). The sequential use of CWE, EE, and SE was the most beneficial in Gelidium corneum processing: it enhanced agar's texturizing capacity (reaching 1150 g/cm2, a 1.5-fold increase when compared to a direct extraction), without affecting its 22 % yield or over 88 % purity. Ultimately, these findings clarified the effects of cascading biorefinery approaches from red seaweeds and their pertinence.
TipoArtigo
URIhttps://hdl.handle.net/1822/91439
DOI10.1016/j.ijbiomac.2023.128479
ISSN0141-8130
Versão da editorahttp://www.elsevier.com/locate/issn/01418130
Arbitragem científicayes
AcessoAcesso aberto
Aparece nas coleções:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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