3121255 documents found, page 311714 of 312126
Análise térmica de um forno de resistência ao fogo
Piloto, P.A.G.; Mesquita, L.M.R.; Pereira, Alexandre AugustoA classificação de produtos de construção em relação ao comportamento ao fogo é determinada pelas normas vigentes, utilizando um forno com curvas de incêndio normalizadas, como são exemplo as curvas de padrão 150 834, ASTM E119, hidrocarbonetos, etc. Neste trabalho pretende-se efectuar uma análise técnica do volume interno do forno de resistência ao fogo, efectuando a medição de temperaturas em l6 pontos geomet...
Nature-based tourism in the north-east of Portugal: an analysis from the perspe...
Martins, Márcio Ribeiro; Esteves, Salete; Radovic, TihanaThe purpose of this paper is to analyse the nature-based tourism in the northeast of Portugal from the perspective of demand. Therefore, it was intended to do the online research of the profile of visitors, focusing on their sociodemographic characteristics and primary motivations for visiting and their satisfaction. Empirical research was conducted on a convenience sample of 204 respondents who visited the pro...
As infra-estruturas de telecomunicações nas regiões periféricas: o papel dos fu...
Pereira, João Pauloinfra-estruturas de telecomunicações e dos sistemas de informação no desenvolvimento de regiões mais periféricas na Europa. A comunidade internacional já bastante tempo que reconhece que as telecomunicações têm um papel central nos esforços de desenvolvimento. No entanto, estamos a assistir a um aumento da discrepância do acesso à informação, em que as regiões com acesso à tecnologia mais recente (e mais cara) ...
Synthesis of Benzo[a]naphtho[2,3-c]xanthones from 2-styrylchromones
Tomé, Sara; Patoilo, Diana; Santos, Clementina M.M.; Silva, Artur2-Styrylchromones, a small group of natural occurring chromones vinylogues of flavones (2-phenylchromones) have been ex tensively studied (both by synthesis and transformations)111 due to their known important biological activities. 121 Following our interest in 2-styrylchromones and exploiting its reactivity as synthons in the preparation of other type of compounds, we studied their reactivity as dienophile in...
Afluências e confluências de um design incógnito
Costa, Carlos Casimiro da; Costa, Jacinta Casimiro daA ‘mínima moralia’ do designer, num mundo de confluências adstrito, submergindo nas ideias e nas confrontações. O Design como agente de engenho e de olhar atento sob as gramáticas do quotidiano despontando sobre esse ‘hapening’ ‘glocal’ em que as lógicas de imprevisibilidade, improbabilidade e ‘desenrascanço’, podem ser agentes dinâmicos de práticas de auto-produção, identidade e sustentabilidade.
Health behaviour and eating habits among foreign students at the Instituto Poli...
Kiss, Benjamin; Kelemen, Katalin; Ferro-Lebres, Vera; Almeida-de-Souza, Juliana; Fernandes, AntónioSeveral studies have addressed to assess the eating habits of university students, but only few studies are about the eating habits of foreign students. Previous studies found that the eating habits are changing in a negative way because of the limited availability and poor quality of familiar foods. The objective of this study was to determine the eating habits of the students before their arrival to Portugal....
Substantiation of the invisible: pedagogical documentation as professional deve...
Mesquita, CristinaThis study started from a collaborative work developed with a group of educators, who work in an institution that welcomes children from 0 to 6 years. The educators, after participating in a seminar on documentation and evaluation in early childhood education, showed enthusiasm to learn how to document the children’s voice and experiences. This study analyses the processes of awareness that occurred over a two-...
Microwave heating: a time saving technology or a way to induce vegetable oils o...
Malheiro, Ricardo; Casal, Susana; Ramalhosa, Elsa; Pereira, J.A.Microwave heating features modern lifestyle. The use of this technology enables a significant reduction in the time dedicated to prepare meals and opens new perspectives at the industrial level. In this chapter we report the combined effect of time/applied potency of microwave heating in comparison to conventional electric oven on the quality of vegetable oils. In general, the degradation pattern of vegetable o...
Clima urbano de Bragança
Gonçalves, Artur; Ribeiro, A.C.; Maia, Filipe; Feliciano, ManuelA cidade de Bragança localiza-se no extremo nordeste de Portugal continental, rodeada a norte pela Serra de Montesinho e a oeste pela Serra da Nogueira (Figura 1). A altimetria da cidade é marcada pela elevada complexidade, ocorrendo variações que podem atingir os duzentos metros numa distância reduzida. A cidade estende-se por aproximadamente 33 km2, com uma população de 23099 habitantes (INE, 2012), à qual se...
ValorNatural®: a project and a platform
Ferreira, Isabel C.F.R.; Barreiro, M.F.; Pais, Luís S.The use of synthetic additives (preservatives and colourants), in the food and cosmetic industries, is a current major concern, from both the human health and environmental points of view. Although considered a promising safer alternative, the use of natural additives still faces some drawbacks and limitations. A specific problem is the difficulty to find abundant natural sources, preferably based on sustainabl...