GBA - Comunicações a Conferências / ConferenceItem
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- Hábitos alimentares de Paralonchurus brasiliensis (Steindachner, 1875) em Penha, SC, Sul do BrasilPublication . Goetten, Maurício Antônio; Bosse, Afonso; Sedrez, Mário C.; Barrilli, Germano H. C.; Verani, José R.; Martins, Mariana de Oliveira; Branco, Joaquim Olinto; Barreiros, João P.Paralonchurus brasiliensis é um Sciaenidae comum no bycatch da pesca de arrasto do camarão sete-barbas (X. kroyeri) no sul do Brasil. A despeito de sua importância ecológica, estudos sobre os hábitos alimentares dessa espécie são ainda incipientes (COSTA et al., 2012). Assim, esse trabalho tem como objetivo analisar os hábitos alimentares de P. brasiliensis, a fim de se avaliar o impacto da pesca de arrasto sobre as cadeias alimentares marinhas costeiras do sul do Brasil.
- Discussão de estratégias para a avaliação da biocolonização em ETICS : um caso de estudo em LisboaPublication . Borsoi, Giovanni; Parracha, João Luís; de Cooman, Quinten; Flores-Coles, Inês; Viegas, Cristina A.; Nunes, Lina; Moreira, Leonilde M.; Veiga, RosárioConservar e Reabilitar monumentos, edifícios e espaços são oportunidades únicas para fomentar a sustentabilidade dos territórios, constituindo-se o ENCORE 2020 - 4º Encontro de Conservação e Reabilitação de Edifícios numa ocasião ímpar para discutir os desafios da transformação no espaço construído: otimizar recursos, reutilizar materiais, melhorar a eficiência energética, repensar as centralidades urbanas, promover a resiliência. O presente documento junta os textos das comunicações apresentadas sobre a multiplicidade de aspetos que se entrecruzam no âmbito da intervenção no património construído, identificando, de forma multidisciplinar e sinergética, os desafios e os caminhos para melhor Conservar e Reabilitar.
- Macro biological degradation of wood treated with sorbitol and citric acid : first results from marine environment and termite exposurePublication . Treu, Andreas; Nunes, Lina; Larnøy, ErikMost European wood species are rapidly and severely degraded in termite-infested areas and the marine environment. There is a need for new solutions, especially in the marine environment, since we lack wood preservatives approved for marine applications in Europe. Several wood modification systems show high resistance against both marine borers and subterranean termites. However, the existing commercialised methods of wood modification are costly. Therefore, a new, low cost and non-toxic wood modification system from inexpensive and readily-available feedstock chemicals have been used in this study. The treatment of wood with a combination of sorbitol and citric acid (PS-modification) showed good resistance against wood borers in the marine environment after one season and against subterranean termites in the laboratory after eight weeks. Future results from the ongoing field tests in the marine environment will reveal the long-term performance of PS-treated wood. The low termite survival rate in the non-choice test already in the first week of testing indicate a mode of action which is not comparable with other wood modification treatments.
- GC- and UHPLC-MS Profiles as a Tool to Valorizate the Red Alga Asparagopsis armataPublication . Lesenfants, Marie L.; Seca, Ana M. L.; Silva, Artur M. S.; Pinto, Diana C. G. A.Asparagopsis armata is considered a biological invader and this red alga is in the last few years one of the worst nightmares for Azores coast biodiversity. So efforts to find an economically valuable application are welcome. In this context biological evaluations of its extracts, such as anti-aging, antioxidant and anticholinesterasic activities, were recently presented [1,2]. Naturally, the knowledge of this species chemical composition is utmost importance not only to find some valuable utilization but also to discovery its mechanisms of defence that can explain its invasive behaviour. In our effort to contribute to this problem solution we establish the GC-MS and UHPLC-MS profiles of both the non-polar and polar extracts. The main compounds in the lipophilic extract were palmitic acid and 1-monopalmitin and brominated compounds dominate both extracts. The detailed results will be presented and discussed in the presentation.
- Anti-aging activity of Lobophora variegata ethanolic and methanolic extracts and their fractionsPublication . Rosa, Gonçalo P.; Costa, Ana C.; Medeiros, D.; Seca, Ana M. L.; Barreto, Maria do CarmoSeaweed have promising applications within food, cosmetic and health industries, which led to an increased interest in studying these organisms [1]. In several coastal areas, thousands of tons of macroalgae are cast on beaches and shorelines and it would be very interesting if this biomass could be managed, allowing the extraction of added-value compounds. In this context, polar extracts (methanol and ethanol) of a macroalgal beach cast sample mainly composed of “Lobophora variegate” were prepared and the anti-aging and antioxidant activities were evaluated. The preliminary results showed interesting results, and thus these crude extracts were then fractionated sequentially by their solubility in dichloromethane, acetone and ethyl acetate, resulting in 4 semi-pure fractions each, which were also tested. Fractions A1.1.1 and A1.2.3 were very good tyrosinase inhibitors (IC₅₀ = 37.87 and 24.01 μg/mL, respectively) and fractions A1.1.2 and A1.2.2 presented very good inhibition of elastase (IC₅₀ = 44.76 and 20.86 μg/mL, respectively). However, none of the fractions was active against collagenase. These results show that further purifications of these fractions can lead to the isolation of bioactive added-value compounds.
- Using Open Remote Sensing and Geographic Data for SMART Monitoring of Nature-based TOURISM in the Azores Islands Natural Parks : towards (more) SustainabilityPublication . Gil, Artur José Freire; Fernández-Urrutia, Manuel; Tiago, Flávio Borges; Tiago, Maria TeresaA remote sensing-based operational tool using Sentinel-2 and Landsat-8 free and open access satellite multispectral data, and based on the Google Earth Engine (GEE) platform, is under development for monitoring land-cover/land-use changes in the Azores Islands Natural Park.
- Evaluation of ETICS characteristics that affect surface mould developmentPublication . Parracha, João Luís; Cortay, Armand; Borsoi, Giovanni; Veiga, Rosário; Nunes, LinaExternal Thermal Insulation Composite Systems (ETICS) are nowadays often used in new constructions but are also one of the most frequently used thermal retrofitting solutions for buildings. These systems have several advantages such as low installation cost, ease of application and increased thermal efficiency. Nevertheless, a number of questions have been raised on their long-time durability particularly related to biodeterioration. Biological growth is strongly influenced by several parameters, such as water content, temperature, pH but also by the type and hygroscopic properties of the building materials. It is therefore essential to understand and correlate those properties with biological growth. This paper aims at evaluating some ETICS characteristics that might influence surface mould development which is recognized as one of the major groups of deteriorating organisms. The susceptibility of the surface finishing layer and thermal insulation to biological growth was assessed through natural inocula and selected fungi and, whenever possible, correlated with water absorption and drying capacity. This study is part of a wider research project: WGB_Shield (Shielding building‘ facades on cities revitalization. Triple-resistance for water, graffiti and biocolonization of external thermal insulation systems) that aims at the development of ETICS with improved durability in the urban environment. Further development on this issue are ongoing.
- The Field Guide app : Connecting island communities to local conservation through mobile interactionPublication . Sousa, Daniel; Rocha Silva, Alexandra Filipa; Rosário, Isabel Amorim do; Ashby, Simone; Arroz, Ana Moura; Piasentin, Flora Bonazzi; Gabriel, Rosalina; Matos, SóniaHere we present Field Guide, a mobile application (app) designed to connect communities to nature-rich environments, which play a crucial role in nature conservation efforts. The app aligns to a mode of science communication that seeks to establish direct contact between publics and specialised scientific communities, most commonly known as the ’ask a scientist’ approach. Field Guide uses a geolocation positioning system to offer users the opportunity to pose questions to scientists whilst exploring a nature conservation site. In this demo, we display the app as a mock-up presentation before its first use by children and teenagers during afield-trip to a nature trail later in 2021.
- Using Sentinel-1 GRD SAR data for volcanic eruptions monitoring: the case-study of Fogo Volcano (Cabo Verde) in 2014/2015Publication . Tiengo, Rafaela; Pacheco, José M. R.; Uchôa, Jéssica Garcia; Gil, Artur José FreireThe last eruption in the Fogo Volcano, which began in November 2014, was the first eruptive event captured by the Sentinel-1 (S1) mission. The present work sought to complement previous research and explore the potential of utilizing data from the Synthetic Aperture Radar (SAR) S1 mission to better monitor active volcanic areas. S1 Ground Range Detected (GRD) data was used to analyze the changes that occurred in the area before, during, and after the eruptive event and was able to identify the progress of the lava flow and measure the affected area (3.89 km2 in total). Using the GRD data on Google Earth Engine (GEE) platform demonstrated high potential in terms of response time to monitor and assess eruptive scenarios in near-real-time, which is fundamental to mitigate risks and to better support crisis management.
- Kaempferol Derivatives from Hedychium gardnerianum : Unveiling the Potential of an Invasive PlantPublication . Tavares, Wilson R.; Barreto, Maria do Carmo; Seca, Ana M. L.The therapeutic properties of plants and of their secondary metabolites are a current research topic of great interest. Considering that Hedychium species are used in folk medicine around the globe, Hedychium gardnerianum Sheppard ex Ker Gawl., an extremely aggressive invasive plant in Hawaii and in Azores, was selected and phytochemically studied in order to search for natural compounds with interesting biological activities. […].