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Browsing by Issue Date, starting with "2025-05-21"

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  • Assessing High-Value Bioproducts from Seaweed Biomass: A Comparative Study of Wild, Cultivated and Residual Pulp Sources
    Publication . Ferreira, Henrique S.; Mouga, Teresa; Lourenço, Sílvia; Matias, Margarida H.; Freitas, Marta V.; Clélia Neves-Afonso
    This study aimed to evaluate the biochemical composition and bioactivities of biomass derived from wild (Laminaria ochroleuca and Saccorhiza polyschides) and cultivated (Macrocystis pyrifera) kelps, as well as industrially extracted residual pulp from M. pyrifera, to assess the potential production of high value bioproducts. All samples had a low lipid content, with M. pyrifera having the lowest (1.3% dw) and S. polyschides showing the highest value (3.3%). Fatty acids such as palmitic acid (C16:0), oleic acid (C18:1n-9 cis), alpha-linolenic acid (ALA, C18:3n-3), and eicosapentaenoic acid (EPA, C20:5n-3) were present, with the residual pulp having a distinctive n-6/n-3 ratio of less than one. The protein content was around 9% dry weight (dw) in all samples. The residual pulp and S. polyschides had the highest polyphenol content, with 4.86 and 4.94 mg GAE·g−1 extract, respectively. Hydroethanolic extracts (30–70%) confirmed Fe3+ reducing activity (FRAP) in all samples. These findings offer valuable insights on the biochemical composition and bioactivity of the kelp species under study and the residual kelp biomass (pulp), underlining their significant potential for applications in the field of Blue Biotechnology.
    2025-05-21Journal article Open access Show more
  • Sustainable Tourism Marketing Through Destination Image: An AHP Approach for UNESCO Creative Cities in Gastronomy—The Case of Popayán, Colombia
    Publication . Moreira, Pablo Henrique de Oliveira; Fraga, Carla; Lavandoski, Joice; Almeida, Paulo; Cardoso, Lucília
    Popayán (Colombia) was the first city to be designated a UNESCO Creative City of Gastronomy in 2005, positioning itself as a symbolic ‘myth of origin’ within the network. In the context of growing demands for local strategies aligned with the Sustainable Development Goals (SDGs), it is pertinent to understand how founding cities manage and project their image through sustainable tourism marketing. Almost two decades later, this study examines how Popayán communicates and sustains its image within the UNESCO Creative Cities Network (UCCN), guided by sustainable tourism marketing principles. Methodologically, the study adopts an exploratory and descriptive case study approach, based on documentary analysis of institutional sources and the application of the adapted Analytic Hierarchy Process Image—UNESCO Creative City Gastronomy (AHPI-UCCG) model. The results provided the following: (1) a multidimensional analysis of Popayán’s image in the context of sustainable marketing; (2) an assessment of how the city’s image responds to current branding challenges, using the adapted AHPI-UCCG model; and (3) a proposal for a context-sensitive investment agenda aligned with sustainability objectives. These results support the development of a personalised strategy for Popayán and demonstrate the potential of this approach to inform analyses of other Creative Cities of Gastronomy, while recognising the unique symbolic role of Popayán as the foundational case.
    2025-05-21Journal article Open access Show more