Repositório Colecção: Artigos (Papers)
https://hdl.handle.net/1822/1223
Artigos (Papers)2024-03-29T15:46:22ZBioaccessibility by perspiration uptake of minerals from two different sulfurous peloids
https://hdl.handle.net/1822/89490
Título: Bioaccessibility by perspiration uptake of minerals from two different sulfurous peloids
Autor: Bastos, Carla Marina; Rocha, Fernando; Patinha, Carla; Marinho Reis, A. Paula
Resumo: Testing the risks of peloid usage in thermal centers, spas, or at home is essential for establishing safety guidelines regarding peloid formulations and releasing concerning substances. Additionally, evaluating the beneficial effects of specific elements on human health helps understand the therapeutic action and effectiveness of pelotherapy for dermatological or musculoskeletal disorders. A methodology was developed to study the biogeochemical behavior of elements in formulated peloids. With periodic stirring, two peloids were created with the same clay and two different sulfurous mineral-medicinal glasses of water for 90 days. Bentonite clay, rich in smectite and primary exchangeable cations Ca and Mg, with high heat capacity, was used. The mineral-medicinal waters were collected from recognized Portuguese thermal centers for their efficacy in treating rheumatic, respiratory, and dermatological pathologies. The peloids were used directly from the maturation tank without drying, and a reference sample of bentonite mixed with demineralized water was prepared. An artificial perspiration test simulated the peloids’ interaction with the skin. Thirty-one elements extracted from the two prepared peloids were analyzed using ICP-MS. The data were analyzed and compared to the original clay's mineralogical composition and the maturation tanks' supernatant composition. The solubility of potentially toxic elements and the bioaccessibility of metals through perspiration were low, with undetectable amounts extracted from the samples. This analytical method provided reliable information on dermal exposure and identifying elements that may enter the bloodstream, requiring the implementation of surveillance and control measures.
<b>Tipo</b>: conferenceAbstract2024-03-13T12:21:50ZA framework for quantifying geodiversity at the local scale: a case study from the Rokua UNESCO Global Geopark
https://hdl.handle.net/1822/88801
Título: A framework for quantifying geodiversity at the local scale: a case study from the Rokua UNESCO Global Geopark
Autor: Tukiainen, Helena; Maliniemi, Tuija; Brilha, J. B.; Alahuhta, Janne; Hjort, Jan
Resumo: Geoconservation and related quantitative and qualitative geodiversity assessments are gaining increasing attention. However, methodologies for measuring geodiversity at local scale are currently rare. Here, we present a framework for assessing local-scale geodiversity of different landforms using field-based and digital elevation model (DEM-) derived data from the Rokua UNESCO Global Geopark in Finland. We observed the presence or absence of various geodiversity elements, such as geological or topographical elements in our study sites, and used these data to quantify alpha (α), gamma (γ) and beta (β) geodiversity of various landforms. In addition, we measured topographical heterogeneity in the field and from DEMs. The results showed distinct patterns in the geodiversity and topographical variation of the landforms. The differences between α, γ and β geodiversity of different landforms were particularly clear. According to the results, measures of topographical variability can be used to some extent as surrogates for geodiversity, but the choice of optimal variables is context and scale dependent. These results provide perspectives for further local-scale geodiversity assessments in different study areas and are applicable for a range of 2 purposes, from scientific research to practical management and geoconservation.
<b>Tipo</b>: articleGeoconservation at the International Union for Conservation of Nature (IUCN)
https://hdl.handle.net/1822/88800
Título: Geoconservation at the International Union for Conservation of Nature (IUCN)
Autor: Monge-Ganuzas, Manu; Guillén-Mondéjar, Francisco; Díaz-Martínez, Enrique; Herrero, Nadia; Brilha, J. B.
Resumo: This work describes the achievements made towards geoconservation within the International Union for Conservation of Nature (IUCN) from the 1990s onwards. The key milestones in the recognition of geoconservation within the IUCN are presented. Initially, the IUCN’s geoconservation efforts were focused on refining the criteria for World Heritage (WH) designation. Subsequently, the actions focused on spreading the geoconservation framework within the IUCN World Conservation Congresses (WCCs), the establishment of an expert group on geoconservation within the IUCN World Commission on Protected Areas (IUCN-WCPA) and the publication of guidelines for geoconservation. We describe how the inclusion within the IUCN membership 2 of three organizations—two of them Spanish: The Geological Society of Spain (SGE) and the
Society for the Defence of Geological and Mining Heritage (SEDPGYM); and one international, ProGEO—has been a key factor. These organizations have achieved the adoption of resolutions
in which geoconservation, its vision, its principles and its definitions have been taken into account in the IUCN WCC (2008–2020 period), and have promoted the geoconservation conceptual framework among nature conservationists. We also analyse the progress made and offer a series of recommendations to improve geoconservation in the future adopting a more integrated approach to nature conservation within the IUCN.
<b>Tipo</b>: articleUAV data and GPR prospection for the study of a pre-historic necropolis in NW Portugal
https://hdl.handle.net/1822/87523
Título: UAV data and GPR prospection for the study of a pre-historic necropolis in NW Portugal
Autor: Gonçalves, Luís Miguel Barros; Bettencourt, Ana M. S.; Henriques, Renato F.; Vilas Boas, Luciano
Resumo: Over past decade, different remote sensing methodologies have been widely used in the detection, exploration and documentation of archaeological sites. Geophysical prospection, photogrammetric surveys and archaeological prospection and excavation are increasingly combined in several archaeological projects that serve both site investigation and dissemination of results. In this work, we present the results of Unmanned Aerial Vehicle (UAV) based survey and its integration with geophysical survey data from Ground Penetrating Radar (GPR), and some results from subsequent archaeological excavation, that were conducted in
the study of Chã da Mourisca necropolis located in Ponte de Lima, NW Portugal. In this study photogrammetry by UAV
enabled the accurate mapping of the necropolis area, with the production of high-resolution RGB orthomosaics and DSM’s
(Digital Surface Models). The GPR survey was conducted, over some selected areas, in a grid based prospection with parallel profiles acquired with 20 cm of separation. The equipment used was the GSSI SIR 3000 with a 400 MHz antennae. The data enabled the definition of the local stratigraphy and the detection of probable cists and ditches/trenches and a semi circular structure. This data was used to select areas for archaeological excavation and, afterwards, the UAV was used to register different phases of the archaeological works. The data obtained is an important auxiliary for the archaeological investigation, as resulting maps and other images, can be used to direct excavations, or to digitally reconstruct the archaeological structures, without the need of excavation, and therefor test ideas about the past. The combination of these methodologies is inexpensive, and quick to perform in the field, and can be systematically applied in the knowledge, safeguard and valorisation of other prehistoric archaeological heritage.
<b>Tipo</b>: conferencePaper2023-12-12T15:13:16ZBoundary of ecosystem services: A response to Chen et al. (2023)
https://hdl.handle.net/1822/87423
Título: Boundary of ecosystem services: A response to Chen et al. (2023)
Autor: Gray, Murray; Fox, Nathan; Gordon, John E.; Brilha, J. B.; Charkraborty, Sbhik; Garcia, Maria da Glória; Hjort, Jan; Kubalíková, Lucie; Seijmonsbergen, Arie C.; Urban, Jan
Resumo: Chen et al. (2023) have proposed a scheme to define which services should be included as ecosystem services and which should be excluded so as to avoid “an all-encompassing metaphor that captures any benefit”. We discuss the proposals, drawing attention in particular to definitions of ‘natural capital’ and ‘ecosystems’, the complexities of separating biotic from abiotic flows, and the importance of geodiversity and geosystem services in delivering societal benefits. We conclude that rather than trying to separate out bits of nature in order to draw the boundary of ecosystem services, it is perhaps time to avoid using ‘nature’ and ‘biodiversity’ as synonyms and think instead of a more holistic and integrated approach involving ‘environmental’, ‘natural’ or ‘nature's services', in which the role of abiotic nature is fully recognised in both ecosystem services and non-ecosystem domains.
<b>Tipo</b>: other2023-12-04T14:41:12Z