Mestrado em Engenharia Química - Ramo Tecnologias de Protecção Ambiental ; O trabalho desenvolvido no âmbito desta dissertação teve como objetivo o estudo da influência dos parâmetros ambientais, azoto e ferro, na produtividade lipídica da microalga Chlamydomonas sp. tendo em vista a sua utilização como matéria-prima para produção de biodiesel. Deste modo, realizaram-se ensaios tendo em vista a otimização das ...
In the Vila de Rei area (Central Portugal) the continental deposits of the Lower Tagus Tertiary Basin lay upon the pediment of the Portuguese Central Chain. Three conglomerate units are recorded from the base upwards, separated by regional or basinal unconformities; Conglomerados de Rio de Moinhos (RM); Conglomerados de Serra de Almeirim (SA) and Conglomerados de Vila de Rei (VR). The first two units (RM and SA...
The geomorphologic characteristics and lithostratigraphic units of the transition from the Tertiary filling stage to the Quaternary fluvial incision in the Vila Velha de Ródão area (Lower Tagus Basin, NE sector) are presented. Several morphodynamic episodes, which had an important tectonic control, were distinguished. The same main morphosedimentary processes can be identified in other areas of this important r...
The Algarve onshore, stretching out at the piedmont of the basement relieves (e.g. Serra do Caldeirão), documents a large planation surface cut on basement rocks and on the Mesozoic to Miocene sedimentary succession, associated with siliciclastic alluvial to coastal marine Pliocene deposits. Along the coast, Pleistocene terraces can be identified. From west to east, the coast exposes steep cliffs cut on the har...
The main topic of this study is the characterisation of primary and secondary fines in a chemical kraft pulp. The former were removed from an unbeaten pulp and the latter from the corresponding decrilled pulp after beating, being their size distributions measured with the Coulter-Multisizer in terms of an equivalent volume diameter. Additionally, some morphological parameters of the fibres were also determined,...
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