Percorrer por autor "Silva, Beatriz"
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- Design exterior de um robô de apoio á comunidade académica do IPBPublication . Piesco, Alane; Silva, Beatriz; Alexandre, Catarina; Costa, Jacinta Casimiro daEste trabalho foi realizado na Unidade Curricular de Investigação em Design, da licenciatura de Arte e design, sob a orientação da docente Jacinta Costa, e parte da análise da proposta de trabalho realizada na Unidade Curricular de Design de Produto II, com a supervisão dos docentes Teresa Tavares e Carlos Costa em colaboração com o centro de investigação CEDRI. Teve como finalidade criar o protótipo do design exterior para um robô de modo a conferir um carácter apelativo e objetivo para a sua função de prestar apoio de informação à comunidade do IPB. O objetivo do projeto foi criar um design com aparência amigável e vintage para que chamasse a atenção do utilizador, mas que facilitasse a sua interação por meio de um exterior prático e uma interface comunicativa. Portanto a metodologia utilizada partiu da identificação do problema seguida de uma investigação por referências de estruturas, materiais e funções e o desenvolvimento de ideias e conceitos através de esboços, estudo de elementos técnicos e formais e maquetes físicas e digitais. Este processo conduziu à seleção de uma forma final que respondesse assertivamente à formulação dos objetivos iniciais. Para conclusão do processo foram realizados os desenhos técnicos e a criação da interface digital para o robô. Obtivemos como resultado um protótipo de cores chamativas, formas arredondadas e simplificadas, corpo de fácil manutenção e ajustes de altura, além do fácil acesso ao interior da máquina, a partir de materiais resistentes e duradouros. A interface é interativa, informativa e cumpre com o proposto da sua utilização. O projeto atingiu as metas estabelecidas destacando-se pela forma e função inovadoras.
- Isolation of filamentous fungi from different food matrices from Angola and MozambiquePublication . Vale-Dias, Teresa; Matusse, Cláudio; Carvalho, Susana; Silva, Beatriz; Soares, Célia; Lucamba, Zelda; Afonso, Sandra; Venâncio, Armando; Rodrigues, PaulaAgriculture remains the main economic activity in most African countries. However, crops are often contaminated with fungi that can cause diseases or produce mycotoxins, which is a major concern to food safety and security. Little is known about the mycotoxigenic fungi contaminating the most relevant staples in Mozambique and Angola. The aim of this work was to isolate and identify fungi from three food commodities – corn, peanuts and beans – and understand if they are a source of mycotoxin exposure to the populations, as these products are fundamental to the local food diet, and important to the economy. Samples of corn from Mozambique, and samples of peanuts and beans from Angola (four samples of each) were analysed for fungal contamination. Samples were also surveyed for aflatoxins using the AgraStrip® Pro WATEX® (Romer) method. Twenty-five grains of each sample were directly plated onto DRBC, and filamentous fungi were isolated after 5 to 7 days of incubation at 25 °C. A total of 56 fungal isolates representing the various fungal morphotypes were molecularly identified by Sanger sequencing of the ITS region. The microbiota of all samples was mainly composed of Aspergillus sp., Fusarium sp. and Penicillium sp., many of them belonging to mycotoxigenic species. Phytopathogenic fungi of four genera – Lasiodiplodia sp., Macrophomina sp., Nigrospora sp. and Pseudocercospora sp. – were also identified. Most species were common to all types of samples. Aflatoxins were detected in all samples.
- Population-specific phenotypic plasticity of endangered bivalves in response to extreme eventsPublication . Gomes-dos-Santos, André; Lopes-Lima, Manuel; Silva, Beatriz; Machado, André M.; Pinto, Rui; Österling, Martin; Wallerius, Magnus Lovén; Urbańska, Maria; Golski, Janusz; Runowski, Sławomir; Kaźmierczak, Sandra; Teixeira, Amilcar; Sousa, Ronaldo; Castro, L. Filipe C.; Castro, Paulo; Carvalho, Francisco; Fonseca, Elza; Froufe, ElsaFreshwater mussels are among the most endangered animal groups, highly sensitive to climate change due to their strict dependence on freshwater habitats. While freshwater mussels are often considered ecologically strict, their distribution across broad environmental gradients raises the possibility of population-specific adaptations mediated by phenotypic plasticity. This study investigates whether geographically and climatically distinct populations of two freshwater mussel species (Unio pictorum and Unio delphinus) exhibit different transcriptomic responses to prolonged heat stress and whether these responses reveal signs of local adaptation. We exposed northern and southern populations of both species to gradually increasing temperatures in controlled laboratory conditions, simulating a prolonged thermal extreme event, and RNA-seq was used to quantify differential gene expression. Results showed strong differences between northern and southern populations of the two species, both in the magnitude and functional composition of transcriptomic responses. Southern populations exhibited intense expression shifts involving classical stress pathways, heat shock proteins, detoxification (cytochrome P450s), apoptosis, and energy metabolism, while northern populations, particularly U. delphinus, showed a markedly subdued response. Notably, U. pictorum's northern population relied heavily on the cytochrome P450 family even at moderate temperatures, while the southern populations of both species activated broader proteostasis and immune responses at higher stress thresholds. These findings demonstrate clear population-specific phenotypic plasticity, shaped by environmental conditions rather than phylogenetic proximity. They underscore the need for conservation strategies to move beyond species-level management, embracing intraspecific variation as a buffer against climate impacts. As climate change accelerates, safeguarding the evolutionary potential encoded within populations, not just species, is essential to preserving biodiversity resilience.