Application of wet route extraction and its potential for attaining biologically active compounds from seaweed biomass: The case-study of Gracilaria gracilis
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Le résumé fourni par la source
Abstract Seaweeds have been targeted as sustainable feedstock for a biorefinery approach. However, extraction is a challenge and the wet route approach (without drying) may be more sustainable and economically viable. The edible red seaweed Gracilaria gracilis is an excellent case-study, since it is produced for agar preparation. Hence, this study tests different extraction techniques and operational parameters in a wet route approach and compares it with the conventional procedure. The best yield results (> 40% dry matter yield) were registered when wet route was coupled either with overnight agitation (biomass:70% ethanol ratio of 1:10, w:v), pH-shift method (biomass:1 M HCl, 1:10), or ultrasound (biomass:70% ethanol, 1:10), reaching 47.1 ± 0.5%, 46.9 ± 0.1%, and 41.8 ± 0.0%, respectively. Applying overnight agitation to wet instead of dry biomass generally produced higher polyphenol contents: up to an increase from 46.3 ± 6.2 to 287.7 ± 36.9 mg GAE (100 g)−1 dw. Ultrasound-assisted extraction of wet biomass yielded up to 309.1 ± 68.1 mg GAE (100 g)−1 dw. The overnight agitation (wet biomass:70% ethanol, 1:10) and ultrasound-assisted extraction (wet biomass:70% ethanol, 1:10) were chosen for characterization as the best extracts and compared to a conventional dry route extract (biomass:70% ethanol, 1:20). ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)) identified a benefit of wet route extraction, with 4469.5–5296.3 μmol Trolox Eq. (100 g)−1 dw. Whereas selected ultrasound-assisted extract had a strong anti-inflammatory activity, reaching 38.3 ± 12.5% of COX-2 inhibition, the dry route extract displayed only 6.8 ± 3.0%. Results show the potential of wet route extraction processes, at least to G. gracilis, paving the way for scale-up and industrial development.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Application of wet route extraction and its potential for attaining biologically active compounds from seaweed biomass: The case-study of Gracilaria gracilis
- Date Crossref
- 13/05/2025
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Portuguese Sea and Atmosphere Institute pays non établi dans la noticeStructure de recherche
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Universidade Politécnica de Setúbal pays non établi dans la noticeUniversité ou école supérieure
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Universidade do Porto pays non établi dans la noticeUniversité ou école supérieure
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Portuguese Institute for the Sea and Atmosphere (IPMA and Bioprospection (DivAV) pays non établi dans la noticeStructure de recherche
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Polytechnic Institute of Setúbal High School for Technology of Barreiro pays non établi dans la noticeUniversité ou école supérieure
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University of Porto Interdisciplinary Centre of Marine and Environmental Research pays non établi dans la noticeUniversité ou école supérieure
Portuguese Sea and Atmosphere Institute, Universidade Politécnica de Setúbal et Universidade do Porto, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.