79 resultados para Professional process
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Tese de Doutoramento em Ciências da Educação (Especialidade em Desenvolvimento Curricular)
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Tese de Doutoramento em Ciências da Educação (área de especilização em Desenvolvimento Curricular).
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Tese de Doutoramento em Ciências da Educação
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The supercritical fluid technology has been target of many pharmaceuticals investigations in particles production for almost 35 years. This is due to the great advantages it offers over others technologies currently used for the same purpose. A brief history is presented, as well the classification of supercritical technology based on the role that the supercritical fluid (carbon dioxide) performs in the process.
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Dissertação de mestrado em Sociologia (área de especialização em Organizações e Trabalho)
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Dissertação de mestrado em Geografia (área de especialização em Planeamento e Gestão do Território)
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Dissertação de mestrado em Sociologia das Organizações e Trabalho
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Dissertação de mestrado em Sociologia Organizações e Trabalho
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Dissertação de mestrado em Ciências da Comunicação (área de especialização em Informação e Jornalismo)
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A highly robust hydrogel device made from a single biopolymer formulation is reported. Owing to the presence of covalent and non-covalent crosslinks, these engineered systems were able to (i) sustain a compressive strength of ca. 20 MPa, (ii) quickly recover upon unloading, and (iii) encapsulate cells with high viability rates.
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Load-bearing soft tissues such as cartilage, blood vessels and muscles are able to withstand a remarkable compressive stress of several MPa without fracturing. Interestingly, most of these structural tissues are mainly composed of water and in this regard, hydrogels, as highly hydrated 3D-crosslinked polymeric networks, constitute a promising class of materials to repair lesions on these tissues. Although several approaches can be employed to shape the mechanical properties of artificial hydrogels to mimic the ones found on biotissues, critical issues regarding, for instance, their biocompatibility and recoverability after loading are often neglected. Therefore, an innovative hydrogel device made only of chitosan (CHI) was developed for the repair of robust biological tissues. These systems were fabricated through a dual-crosslinking process, comprising a photo- and an ionic-crosslinking step. The obtained CHIbased hydrogels exhibited an outstanding compressive strength of ca. 20 MPa at 95% of strain, which is several orders of magnitude higher than those of the individual components and close to the ones found in native soft tissues. Additionally, both crosslinking processes occur rapidly and under physiological conditions, enabling cellsâ encapsulation as confirmed by high cell survival rates (ca. 80%). Furthermore, in contrast with conventional hydrogels, these networks quickly recover upon unloading and are able to keep their mechanical properties under physiological conditions as result of their non-swell nature.
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Dissertação de mestrado em Educação Especial (área de especialização em Dificuldades de Aprendizagem Específicas)
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Relatório de estágio de mestrado em Ensino de Inglês e Espanhol no 3º Ciclo do Ensino Básico e Ensino Secundário
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Relatório de mestrado em Ensino de Educação Física nos Ensinos Básico e Secundário
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Relatório de estágio de mestrado em Ensino de Informática