Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/91439
Título: | Red 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-chave: | Macroalgae Hydrocolloids Rheological behaviour |
Data: | Fev-2024 |
Editora: | Elsevier 1 |
Revista: | International Journal of Biological Macromolecules |
Citação: | Gomes-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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/91439 |
DOI: | 10.1016/j.ijbiomac.2023.128479 |
ISSN: | 0141-8130 |
Versão da editora: | http://www.elsevier.com/locate/issn/01418130 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_57729_1.pdf | 3,42 MB | Adobe PDF | Ver/Abrir |