140 resultados para López Jordán, Ricardo, 1822-1889.
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The layer-by-layer (LbL) deposition method was used to build up alternating layers (five) of different polyelectrolyte solutions (alginate, zein-carvacrol nanocapsules, chitosan and chitosan-carvacrol emulsions) on an aminolysed/charged polyethylene terephthalate (A/C PET) film. These nanolaminated films were characterised by contact angle measurements and through the determination of water vapour (WVTR) and oxygen (O2TR) transmission rates. The effect of active nanolaminated films against the Alternaria sp. and Rhizopus stolonifer was also evaluated. This procedure allowed developing optically transparent nanolaminated films with tuneable water vapour and gas properties and antifungal activity. The water and oxygen transmission rate values for the multilayer films were lower than those previously reported for the neat alginate or chitosan films. The presence of carvacrol and zein nanocapsules significantly decreased the water transmission rate (up to 40 %) of the nanolaminated films. However, the O2TR behaved differently and was only improved (up to 45 %) when carvacrol was encapsulated, i.e. nanolaminated films prepared by alternating alginate with nanocapsules of zein-carvacrol layers showed better oxygen barrier properties than those prepared as an emulsion of chitosan and carvacrol. These films containing zein-carvacrol nanocapsules also showed the highest antifungal activity (30 %), which did not significantly differ from those obtained with the highest amount of carvacrol, probably due to the controlled release of the active agent (carvacrol) from the zein-carvacrol nanocapsules. Thus, this work shows that nanolaminated films prepared with alternating layers of alginate and zein-carvacrol nanocapsules can be considered to improve the shelf-life of foodstuffs.
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Dissertação de mestrado integrado em Materials Engineering
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Dissertação de mestrado integrado em Engenharia de Telecomunicações e Informática
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Dissertação de mestrado integrado em Engenharia e Gestão de Sistemas de Informação
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Tendo por base os novos desafios com que o sector da construção, nomeadamente este artigo tem como objetivo a avaliação dos custos económicos e dos benefícios em termos energéticos e de sustentabilidade decorrentes da implementação de três cenários de reabilitação (básica, energética e sustentável) num edifício unifamiliar situado no centro histórico de Viana do Castelo.
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The paper reflects the work of COST Action TU1403 Workgroup 3/Task group 1. The aim is to identify research needs from a review of the state of the art of three aspects related to adaptive façade systems: (1) dynamic performance requirements; (2) façade design under stochastic boundary conditions and (3) experiences with adaptive façade systems and market needs.
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The healthcare project design requires a several number of concerns with the satisfaction and well‐being of the working team, patient and administrators, has a strong social responsibility and impact on the city. Due to various design requirements, these buildings are not designed and used in a sustainable way, because there are still no effective methods to support designers in this context. Consequently, they do not know what the best criteria to be followed and their managers are not aware of the measuresthatshould be adopted for efficient use. Furthermore, the aim of this study is to present a proposal for a Healthcare Building Sustainability Assessment (HBSA) method adapted for the Portuguese context and considering the work developed so far in the standardization bodies (CEN and ISO). For this, the chosen methodology is analysed and compared the most relevant building sustainability assessment tools in the context of healthcare buildings.
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The management of urban environment, together with the preservation of the natural environment and the creation of a sustainable built environment, is a complex challenge for contemporary societies. In the name of progress, cities are contributing for the degradation of all surrounding ecosystems. Therefore there is an arising demand for developing new strategies and a new urban development paradigm settled in the search for the equilibrium between natural and built environments and efficient use of resources. The objective of this paper is to analyse how the urban expansion of the city of Estarreja took place in relation to the land use, based on the land capability classification maps of the area. Based in the results some sustainable development strategies that might be applied to the city are discussed. The obtained results demonstrate that the city has been growing faster then its population, consuming vast portions of land, since its growth as been occurring in a linear form. Despite this fact, results show that most of this expansion took place towards a territory of lower agricultural potential, when comparing to the location of its original settlement.
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Recently, environmental architecture and sustainable construction has been ranked on top of the worldâ s interests. Making use of natural resources helps in reducing energy consumption and costs associated with the operation of buildings. The current architectural approaches and designs in Palestine are far away from environmental concepts, copying and simulating abroad approaches, without taking into account the culture, climate, and inhabitant's needs. On the contrast, vernacular architecture has achieved environmental concepts and has given suitable approaches and samples - without any need to simulate or copy - which come from people and land. This paper discusses how the Palestinian socio-cultural context shaped the residential vernacular architecture in Palestine, taking the old city of Nablus as a case-study. The research concept depends on analysing and trying to understand the effect of the socio-cultural context on vernacular architecture and trying to reach some rules or understandings of how it works in order to reach a modern environmental dwelling that is suitable to this concept. The research method goes through analysing study cases from the traditional architecture models and the Nablus city is selected as a case study. This analytical and qualitative method can lead to deep understanding for how to benefit from vernacular architecture in Palestine in finding the future environmental residential construction. One of the main findings of this research is to set general and special rules for building sustainable buildings in Palestine from the socio-cultural point view, in order to be a reference for designers, stakeholders, ministry of planning, and municipalities.
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According to the latest census (2011) covering the Portuguese housing stock, there is a considerable number of sub-occupied buildings and most of them were built before the first Portuguese Thermal Code (RCCTE). In view of the objectives of the European Union (20-20-20), it is necessary to contribute to the rehabilitation of existing buildings by promoting the densification of oversized houses, while complying with up-to-date comfort standards and codes. In this sense, this research is aimed to analyse this problem at the outskirts of Braga, by identifying the type-morphology of oversized buildings, assessing the degree of satisfaction and expectations of both owners and inhabitants and developing and testing a systematic design tool. Through the development of an intervention kit, wich systematizes and priorizes design strategies and solutions, the design team can have the necessary decision-making support tool to improve the spacial design of the building whilst considering energy efficency, sustainability and improvemente of interior environmental quality.
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Nowadays cities are facing several environmental problems due to the population migration to urban areas, which is causing urban sprawl. This way, it is very important to define solutions to improve Land Use Efficiency (LUE). This article proposes the use of community buildings features as a solution to increase land use efficiency. Community buildings consider the design of shared building spaces to reduce the floor area of buildings. This work tests the performance of some case-study buildings regarding LUE to analyse its possible pros and cons. A quantifiable method is used to assess buildingsâ LUE, which considers the number of occupants, the gross floor area, the functional area, the implantation area and the allotment area. Buildings with higher values for this index have reduced environmental impacts because they use less construction materials, produce less construction and demolition wastes and require less energy for building operation. The results showed that the use of community building features can increase Land Use Efficiency of buildings.
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In recent decades the vernacular architecture has been recognized as an important source of knowledge in the adaptation of construction to the climate and other specific local characteristics. However, the systematized information is still scarce to quantitatively understand the hydrothermal behaviour of bioclimatic strategies identified in previous surveys to this type of architecture. Using the farmsteads in the northeast region of Portugal as a case study, this article presents the results of hygrothermal monitoring carried out during the heating and cooling seasons. The data obtained enabled to verify and quantify the effective performance of the identified bioclimatic strategies, which are presented as opportunities for contemporary architecture.
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A presente investigação desenvolveu uma análise profunda do setor da distribuição farmacêutica, no período compreendido entre 2000 e 2009, procurando identificar as possíveis relações de interdependência entre o meio envolvente e as opções de estratégia das empresas que constituíram a amostra de estudo e entre as referidas opções de estratégia e as estruturas e o desempenho dessas empresas. A dinâmica do mercado do medicamento na economia nacional, com um valor de 3,2 mil milhões de euros anuais (Infarmed, 2010), apresenta um impacto significativo na esperança de vida e na qualidade de vida dos cidadãos. Segundo a OCDE, os produtos farmacêuticos são responsáveis por quase um quinto de todos os gastos com saúde, em média, nos países da OCDE. Neste contexto, a distribuição farmacêutica representa uma componente crítica. A disponibilização de medicamentos em ambulatório num curto espaço de tempo só é possível devido a uma estrutura logística com características muito específicas. A qualidade do armazenamento e do transporte dos medicamentos desde a saída dos laboratórios até à chegada às farmácias é rigorosamente monitorizada e controlada. O setor da distribuição farmacêutica assume assim uma postura elementar na cadeia do medicamento, contribuindo para a melhoria da qualidade do sistema de saúde que se tem vindo a verificar nas últimas décadas e prestando um serviço com valor para a comunidade, uma vez que se compromete a assegurar um adequado e contínuo fornecimento de medicamentos para que as necessidades dos doentes e das populações em geral sejam satisfeitas. As alterações verificadas ao longo dos últimos anos estimularam a dinâmica concorrencial entre os diferentes agentes neste mercado, bastante regulamentado e com elevado entrosamento financeiro com o Estado, o que obrigou a rápidas mudanças. Neste contexto, a sobrevivência das empresas, o seu crescimento e a sua perenidade futura têm constituído um desafio abordado de forma diversa por cada empresa.
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The MAP-i Doctoral Programme in Informatics, of the Universities of Minho, Aveiro and Porto
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Dissertação de mestrado em Sustentabilidade do Ambiente Construído