Browsing by resource type "lecture"
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- Acid sulfite pretreatment in the enzymatic hydrolysis of Cytisus striatus: optimization strategyPublication . Vaz, Álvaro; Gomes, Tânia; Simões, RogérioEthanol production from lignocellulosic material includes three major steps: biomass pretreatment, which fragments the lignocellulosic matrix to facilitate the enzymes access to the substrate; hydrolysis, where the polysaccharides are converted into fermentable sugars (e.g. glucose and xylose); and finally, fermentation that produces ethanol or other biologically based chemicals (e.g. lactic acid, succinic acid). The aim of the present work was to study the effect of some operative variables of the pretreatment stage, namely sodium hydrogen sulfite and sulfuric acid loadings, temperature and time, on the release of sugars in the enzymatic hydrolysis of Cytisus striatus, performed applying a Novozymes® cocktail, with fixed charges and operating conditions. Wood branches were chipped and submitted to different reaction conditions, with a central composite experimental design 2^4+star, exploring the following variables: sulfuric acid charge (0-3%, on wood), sodium bisulfite charge (0-4 %, on wood), maximum temperature (150-190ºC) and time at maximum temperature (0-30 minutes). After pretreatment, the acid hydrolysates were recovered, the solid residues were mechanically disintegrated and thereafter subjected to enzymatic hydrolysis with an enzymatic cocktail from Novozymes®. Sugars and by-products released in the sulphite pretreatment and enzymatic treatment hydrolysates were analyzed by HPLC.
- Afinidade entre Agregado e BetumePublication . Almeida, Marisa S. Dinis; Maia, Maria; Martinho, FernandoAs administrações de estradas um pouco por todo o mundo têm tomado consciência da importância de alargar o ciclo de vida dos materiais constituintes das diferentes camadas dos pavimentos rodoviários. O principal objetivo é aumentar a durabilidade os pavimentos pois quanto maior a vida útil, menos recursos serão gastos na sua conservação e reabilitação.
- Constructing a national identity in Timor-Leste: ReflectionsPublication . Schouten, Maria Johanna ChristinaIn May 2002, when its independence was formally established, Timor-Leste became the latest of the former Portuguese colonies that had to come to terms with its colonial heritage. But this was not its only challenge, as this territory had been occupied by its neighbour Indonesia in the period 1975-1999, entailing misery for the population and an ‘Indonesiazation’ of their cultural expressions and institutions. The new state of Timor-Leste needed to conquer respect on the world stage – on the map it is a dwarf between the giants of Indonesia and Australia – and also legitimacy among its citizens, where problems triggered in particular by the Indonesian occupation still lingered. Therefore, the closely-connected processes of state-building, nation-building and identity-building have been going on until now. The state and several linked organizations such as the educational institutions are highly involved in the promotion of the ‘feeling of belonging’ to Timor-Leste among the citizens. Factors which complicate this identity-construction include internal rivalries, the cultural influence of Indonesia, and the great heterogeneity of the population, which counts about twenty ethnolinguistic groups. In the paper several dimensions and symbolic objects and events that are created and activated for the construction of a national identity are examined. These are the flag and anthem, language, religion, monuments, the cult of national heroes, and national celebrations. In most of these dimensions elements of perceived national culture as well as of Portuguese legacy are interwoven. The paper is based on documental research and interviews and observations in Timor-Leste during November 2016. PowerPoint, not the written texto, available.
- Desempenho de misturas recicladas temperadasPublication . Almeida, Marisa S. Dinis; Afonso, Márcia Isabel Lopes; Duarte, MartaUm dos principais desafios que a sociedade enfrenta nos dias de hoje são as preocupações com o meio ambiente sendo um dos objetivos mais procurado a diminuição do consumo de combustíveis fósseis e das emissões para a atmosfera.
- Distance and proximity: social sciences and their approach to ‘other cultures’Publication . Schouten, Maria Johanna ChristinaIn this farewell lecture, some topics related to the question of culture contact are addressed. These include the various ways in which other cultures are observed and judged, with special attention paid to the approach taken by the social sciences; practices of anthropological fieldwork; and the various, historically changing attitudes and practices adopted by the so-called Western world towards other cultures, in particular those in Asia. The text is an English version of the Portuguese original.
- Distância e aproximação: as ciências sociais e a sua abordagem de ‘outras culturas’Publication . Schouten, Maria Johanna ChristinaEsta comunicação, proferida como ‘última aula’ na Universidade da Beira Interior, aborda o encontro e o desencontro entre culturas, numa perspetiva histórica e com um olhar antropológico. Tópicos discutidos incluem as várias formas de observar e avaliar «outros», com destaque para a abordagem das ciências sociais; práticas de trabalho de campo na antropologia; e as diversas atitudes e ações do chamado mundo ocidental frente a outras culturas, em particular as asiáticas. Recorre-se a exemplos das artes visuais, da literatura, e do percurso biográfico da autora.
- As experiências africanas e asiáticas comparadas.Publication . Schouten, Maria Johanna ChristinaApresentação do painel: As experiências africanas e asiáticas comparadas no V Congresso de Estudos Africanos no Mundo Ibérico, na UBI, Covilhã.
- Imagens da prostituição femininaPublication . Schouten, Maria Johanna ChristinaEsta abordagem do fenómeno de prostituição feminina foca o impacto da imagem negativa de trabalhadoras sexuais na sua auto-imagem e no seu estatuto na sociedade. Neste contexto, discute-se noções de estigma (Goffman) e opiniões divergentes sobre a comodificação da sexualidade, com referência a autores como Simmel e Appadurai. Ilustrações são apresentadas das atitudes face a trabalhadoras sexuais em vários países e em vários períodos, em particular na história de Portugal. This approach to the phenomenon of female prostitution focuses on the impact the negative image of sex workers has on their own self-image and on their status in society. In this context, notions about stigma (Goffman) are examined and divergent opinions about the commodification of sexuality, drawing on authors such as Simmel and Appadurai, are discussed. Illustrations are provided of the attitudes towards female sex workers in various countries, and in various periods, in particular in the history of Portugal.
- Mitologias Greco-Romanas e as Ciências da SaúdePublication . Rosa, José Maria SilvaNotas sobre a relação entre Mitologia e Medicina / Higiene...
- MSP430 WorkshopPublication . Gaspar, Pedro Dinis; Espírito Santo, António; Ribeiro, BrunoThe family of microcontrollers from TI has several low-power devices that include different peripherals for various applications. The architecture combined with the low power modes of operation makes this family very suitable for low- powered battery applications.The data sheet can be consulted to give more specific data. For information on the family the user guide should be consulted.
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