Sado River estuary is located in the west coast of Portugal. Previous environmental studies identified industrial contamination, non-point anthropogenic sources and contamination coming from the river, all promoting accumulation of polluted sediments with known impacts on the ecological system. Surrounding human populations have intense economic fishery activities. Together with agriculture, estuary fishing pro...
Tese de mestrado em Bioquímica (Bioquímica Médica), apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 ; The main goal of this thesis was to have an integrative view both in peripheral glucose homeostasis and its impact on brain synaptic proteins content. In our first study we hypothesized that N-acetyl-cysteine (NAC) as a source of the essential amino acid cysteine, critical for glut...
Trabalho de Projeto apresentado como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão de Informação ; Um dos maiores desafios no processo de clustering está na multidimensionalidade da maioria dos problemas. A descrição de um fenómeno, necessita, normalmente, de um número elevado de variáveis, afetando assim, a eficiência dos algoritmos de clustering. Muitos destes algoritmos são sensí...
O Estágio Pedagógico constitui uma etapa da formação docente que tem como objetivo fornecer ao estagiário a oportunidade de experienciar todas as atividades inerentes á função docente, num processo acompanhado e supervisionado, onde se pretende que este seja capaz de mobilizar todo o conhecimento até então adquirido e que realize as aprendizagens necessárias às práticas metodológicas e organizacionais de gestão...
Chemical speciation in foodstuffs is of uttermost importance since it is nowadays recognized that both toxicity and bioavailability of an element depend on the chemical form in which the element is present. Regarding arsenic, inorganic species are classified as carcinogenic while organic arsenic, such as arsenobetaine (AsB) or arsenocholine (AsC), is considered less toxic or even non-toxic. Coupling a High Perf...
A ingestão de alimentos representa a principal fonte de exposição humana ao arsénio, sendo que a sua acumulação no organismo causa doenças a médio e longo prazo. No entanto a toxicidade dos elementos não depende apenas do seu teor total mas principalmente da espécie química em que estes se encontram presentes nos alimentos. No caso particular do arsénio, as espécies inorgânicas são mais tóxicas que as orgânicas...
Quinoa (Chenopodium quinoa), and kiwicha (Amaranthus caudatus) are pseudo-cereals largely consumed in North of Argentina. They gained special attention by scientific community in part due to high nutritional value. Therefore the nutrient analysis with the purpose to be included in Argentinean Food Composition Databank is urgent. In this work proximal and mineral profile of Quinoa consumed in the North of Argent...
In Europe one feature of National Food Composition Databanks (nFCDBs) is to provide data soundly supported in standardized quality assurance procedures. It is now widely recognized that the evaluation of the degree of dispersion associated with a result is an essential part of any quantitative analysis. According to recent requirements the concept of data quality incorporates the evaluation of the measurement u...
Total Diet Studies (TDS) are the most important tools to assure that chemical contaminants presence in foodstuffs remains within safety levels. Reliability of data provided by laboratories to assess the effectiveness of measurements aiming at reducing the risk of exposure to chemical hazards is of paramount importance. Evaluation of measurement uncertainty associated with a result is an important parameter in a...
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