19 resultados para VUV EXCITATION PROPERTIES


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Vacuum, Vol. 64

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The computations performed by the brain ultimately rely on the functional connectivity between neurons embedded in complex networks. It is well known that the neuronal connections, the synapses, are plastic, i.e. the contribution of each presynaptic neuron to the firing of a postsynaptic neuron can be independently adjusted. The modulation of effective synaptic strength can occur on time scales that range from tens or hundreds of milliseconds, to tens of minutes or hours, to days, and may involve pre- and/or post-synaptic modifications. The collection of these mechanisms is generally believed to underlie learning and memory and, hence, it is fundamental to understand their consequences in the behavior of neurons.(...)

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Annals of Microbiology, 59 (4) 705-713 (2009)

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Dissertação apresentada para obtenção do grau de Doutor em Bioquímica,especialidade Bioquímica-Física, pela Universidade Nova de Lisboa, Faculdade de Cincias e Tecnologia

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Dissertação para Obtenção de Grau de Mestre em Engenharia Química e Bioquímica

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This study focus on the probabilistic modelling of mechanical properties of prestressing strands based on data collected from tensile tests carried out in Laboratório Nacional de Engenharia Civil (LNEC), Portugal, for certification purposes, and covers a period of about 9 years of production. The strands studied were produced by six manufacturers from four countries, namely Portugal, Spain, Italy and Thailand. Variability of the most important mechanicalproperties is examined and the results are compared with the recommendations of the ProbabilisticModel Code, as well as the Eurocodes and earlier studies. The obtained results show a very low variability which, of course, benefits structural safety. Based on those results, probabilistic modelsfor the most important mechanical properties of prestressing strands are proposed.

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J Biol Inorg Chem (2006) 11: 609–616 DOI 10.1007/s00775-006-0110-0

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Dissertação para obtenção do Grau de Doutor em Engenharia Química e Bioquímica

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A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics

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Dissertação para obtenção do Grau de Mestre em Biotecnologia

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Construction and Building Materials 51 (2014) 287–294

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Construction and Building Materials 54 (2014) 378–384

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Dissertation presented to obtain the Ph.D degree in Biochemistry

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Dissertation presented to obtain the Ph.D degree in Chemistry.