Flavored asymmetries for type II seesaw leptogenesis

A novel contribution to the leptonic CP asymmetries in type II seesaw leptogenesis scenarios is obtained for the cases in which flavor effects are relevant for the dynamics of leptogenesis. In the so-called flavored leptogenesis regime, the interference between the tree-level amplitude of the scalar triplet decaying into two leptons and the one-loop wave function correction with leptons in the loop, leads to a new nonvanishing CP asymmetry contribution. The latter conserves total lepton number but violates lepton flavor. Cases in which this novel contribution may be dominant in the generation of the baryon asymmetry are briefly discussed.

Impactos do projecto solvência II nos sistemas de governance das seguradoras portuguesas

Mestrado em Contabilidade e Gestão das Instituições Financeiras

Informação e propaganda na II Guerra Mundial : o papel da cultura popular urbana americana, os seus filmes e as suas canções

Dissertação de Mestrado, Ciências da Comunicação, 24 de Novembro de 2015, Universidade dos Açores.

Prática de ensino supervisionada II: a sequência didática como estratégia para escrita de textos no 1º ano de escolaridade

Relatório de Estágio apresentado à Escola Superior de Educação de Lisboa para obtenção de grau de mestre em Ensino do 1º e 2º CEB

Voltammetric oxidation of drugs of abuse II. Codeine and metabolites

The oxidation of codeine on glassy carbon electrodes has been studied in detail using differential pulse voltammetry. The results obtained using a glassy carbon electrode clearly show a much more complex oxidation mechanism than that previously reported when platinum and gold electrodes were used. To clarify the codeine oxidative profile, several metabolites and analogues of this alkaloid, codeine N-oxide, norcodeine, dihydrocodeine, acetylcodeine and 6- chlorodesoxycodeine, were synthesized and studied. It was deduced that the anodic waves observed in codeine oxidation are related to the presence of methoxy, hydroxy and tertiary amine groups. Due to the similarity of potentials at which these oxidative processes take place, at some pHs an overlap of peaks occurs and only one anodic wave is observed.

Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: kinetic modelling

Specific marine macro algae species abundant at the Portuguese coast (Laminaria hyperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75–100 mg L−1. The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges of 23.9–39.5, 18.6–32.0 and 32.3–50.4 mg g−1, respectively. Kinetic studies revealed that the metal uptake rate was rather fast, with 75% of the total amount occurring in the first 10 min for all algal species. Experimental data were well fitted by a pseudo-second order rate equation. The contribution of internal diffusion mechanism was significant only to the initial biosorption stage. Results indicate that all the studied macro algae species can provide an efficient and cost-effective technology for eliminating heavy metals from industrial effluents.

Optimization of Cu(II) biosorption onto ascophyllum nodosum by factorial design methodology

A Box–Behnken factorial design coupled with surface response methodology was used to evaluate the effects of temperature, pH and initial concentration in the Cu(II) sorption process onto the marine macroalgae Ascophyllum nodosum. The effect of the operating variables on metal uptake capacitywas studied in a batch system and a mathematical model showing the influence of each variable and their interactions was obtained. Study ranges were 10–40ºC for temperature, 3.0–5.0 for pH and 50–150mgL−1 for initial Cu(II) concentration. Within these ranges, the biosorption capacity is slightly dependent on temperature but markedly increases with pH and initial concentration of Cu(II). The uptake capacities predicted by the model are in good agreement with the experimental values. Maximum biosorption capacity of Cu(II) by A. nodosum is 70mgg−1 and corresponds to the following values of those variables: temperature = 40ºC, pH= 5.0 and initial Cu(II) concentration = 150mgL−1.

Soil remediation time to achieve clean-up goals II: influence of natural organic matter and water contents

This work reports a relatively rapid procedure for the forecasting of the remediation time (RT) of sandy soils contaminated with cyclohexane using vapour extraction. The RT estimated through the mathematical fitting of experimental results was compared with that of real soils. The main objectives were: (i) to predict the RT of soils with natural organic matter (NOM) and water contents different from those used in experiments; and (ii) to analyse the time and efficiency of remediation, and the distribution of contaminants into the soil matrix after the remediation process, according to the soil contents of: (ii1) NOM; and (ii2) water. For sandy soils with negligible clay contents, artificially contaminated with cyclohexane before vapour extraction, it was concluded that: (i) if the NOM and water contents belonged to the range of the prepared soils, the RT of real soils could be predicted with relative differences not higher than 12%; (ii1) the increase of NOM content from 0% to 7.5% increased the RT (1.8–13 h) and decreased the remediation efficiency (RE) (99–90%) and (ii2) the increase of soil water content from 0% to 6% increased the RT (1.8–4.9 h) and decreased the RE (99–97%). NOM increases the monolayer capacity leading to a higher sorption into the solid phase. Increasing of soil water content reduces the mass transfer coefficient between phases. Concluding, NOM and water contents influence negatively the remediation process, turning it less efficient and more time consuming, and consequently more expensive.

Optical fiber sensor for Hg(II) based on carbon dots

An optical fiber sensor for Hg(II) in aqueous solution based on sol–gel immobilized carbon dots nanoparticles functionalized with PEG200 and N-acetyl-l-cysteine is described. This sol–gel method generated a thin (about 750 nm), homogenous and smooth (roughness of 2.7±0.7 a˚ ) filmthat immobilizes the carbon dots and allows reversible sensing of Hg(II) in aqueous solution. A fast (less than 10 s), reversible and stable (the fluorescence intensity measurements oscillate less than 1% after several calibration cycles) sensor system was obtained. The sensor allow the detection of submicron molar concentrations of Hg(II) in aqueous solution. The fluorescence intensity of the immobilized carbon dots is quenched by the presence of Hg(II) with a Stern-Volmer constant (pH = 6.8) of 5.3×105M−1.

O Reinado de Isabel II e a relação com os média

A Rainha Isabel II, que completou oitenta e quatro anos em Abril de 2010, conta actualmente com cinquenta e sete anos de reinado, um longo período que tem sido caracterizado pela mediatização das formas simbólicas. Utilizamos a expressão “formas simbólicas” de acordo com o significado que lhe é atribuído por John Thompson, devendo-se entender por tal um amplo conjunto de “acções e falas, imagens e textos, que são produzidos por sujeitos e reconhecidos por eles e outros como construtos significativos.” (1998: 79)

Adding value [valorization] to tannery fleshings: part II – effect of protein hydrolysates on leather dyeing

The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The main objective of the present work was to study the effect of protein hydrolysates (HP) prepared from fleshings on leather dyeing. During previous studies it was found that the application of HP products, obtained from fleshings, in leather retannage intensified the colour of crust leather. In this work the CIELAB colour system was used to evaluate the effect of HP on retannage processes. The main conclusions of this study were: (i) HP can be used instead of a dicyanodiamide resin (Fortan DC) if the colour parameters of the standard procedure are to be maintained, and (ii) the replacement of an acrylic resin (Fortan A40) by glutaraldehyde-modified HP (GHP) results in a darker skin, and can therefore be interesting for the reduction of the quantity of dye used.

Atas do II Encontro de Mestrados em Educação e Ensino da Escola Superior de Educação de Lisboa

Na continuidade da publicação das Atas do I Encontro dos Mestrados em Educação da ESELx (1.º EME), realizado em 2013, a publicação dos artigos reunidos neste volume de atas, submetidos a revisão científica anónima, pretende tornar acessível, a um público mais vasto e diversificado, as comunicações apresentadas no II Encontro dos Mestrados em Educação e Ensino da ESELx (2.º EME), que decorreu na Escola Superior de Educação de Lisboa, no dia 8 de março de 2014. O Encontro foi dinamizado pela Comissão Coordenadora de Mestrados, instância do Conselho Técnico-Científico, em colaboração com o Centro Interdisciplinar de Estudos Educacionais – CIED, em que se inscrevem os projetos e programas de investigação desenvolvidos na ESELx. Prevendo-se que venha a ter, futuramente, uma periodicidade bianual, o Encontro dos Mestrados em Educação e Ensino da ESELx tem como objetivos centrais divulgar a investigação produzida no âmbito dos vários Mestrados na ESELx, e simultaneamente, constituir-se como um fórum de discussão, não só dos resultados obtidos, mas também das diversas abordagens metodológicas adotadas. Com este II Encontro de Mestrados, pretendeu-se ampliar a divulgação da investigação desenvolvida na ESELx, ao contemplar, quer a formação de natureza pós-profissional, no âmbito de mestrados dirigidos a profissionais em educação já no terreno, quer a formação inicial desses profissionais, no âmbito dos mestrados que habilitam para a docência nos contextos da Educação Pré-Escolar e do Ensino Básico (1.º e 2.º Ciclos). Este Encontro inaugura, como foi referido, a apresentação dos trabalhos desenvolvidos pelos estudantes do Mestrado em Educação Pré-Escolar, realizados no âmbito da Prática Profissional Supervisionada nos contextos de creche e jardim de infância. Neste âmbito as nove comunicações apresentadas enquadram-se numa discussão mais ampla sobre a formação de educadores/as de infância na academia portuguesa, que tem vindo a considerar a necessidade de densificar, entre outros objetivos, uma formação que dê corpo, considere e promova o desenvolvimento de uma atitude de natureza investigativa e reflexiva do/no exercício da profissão. Considerando que a investigação possa ser também entendida numa dimensão social e cultural, envolvida com o contexto em que está inserida, a apresentação oral e escrita dos trabalhos desenvolvidos configurou-se como uma oportunidade de divulgação de processos de saber compartilhado, o que, em fim último, caracteriza a própria função pedagógica da investigação no exercício da profissão docente. Os dezassete artigos, situados no contexto dos mestrados pós-profissionalização, abrangem áreas diferenciadas, tais como a intervenção precoce, o teatro, as artes plásticas, a educação matemática, a supervisão e a didática da língua portuguesa. Os percursos metodológicos privilegiados contemplam as abordagens de natureza qualitativa, quantitativa, e ainda abordagens mistas. Alguns dos estudos desenvolvidos adotaram o design de estudo de caso e outros de investigação-ação.A grande diversidade de temas, domínios e abordagens apresentados faz desta publicação um pertinente recurso para apoio epistemológico e metodológico aos estudantes inseridos em processos investigativos diversificados e, ainda, um contributo para a divulgação de conhecimento no âmbito da educação e do ensino, no contexto da realidade educativa portuguesa.

Contributions à la Paléontologie du Miocène moyen continental du Bassin du Tage. II - Observations sur les dents pharyngiennes de poissons cyprinidés - Póvoa de Santarém.

The study of Cyprinid fish pharyngeal teeth, collected by M. Telles Antunes in continental "Helvetian" sediments from Póvoa de Santarém, makes possible to demonstrate the occurrence of two distinct species. One remains undetermined. The other belongs to the recent genus Leuciscus CUV. Several dental types of this genus are described and figured as Leuciscus antunesi nov. sp. Palaeoclimatical and palaeoecological interpretations are proposed.

Towards a unified theory of health-disease: II. Holopathogenesis

This article presents a systematic framework for modeling several classes of illness-sickness-disease named as Holopathogenesis. Holopathogenesis is defined as processes of over-determination of diseases and related conditions taken as a whole, comprising selected facets of the complex object Health. First, a conceptual background of Holopathogenesis is presented as a series of significant interfaces (biomolecular-immunological, physiopathological-clinical, epidemiological-ecosocial). Second, propositions derived from Holopathogenesis are introduced in order to allow drawing the disease-illness-sickness complex as a hierarchical network of networks. Third, a formalization of intra- and inter-level correspondences, over-determination processes, effects and links of Holopathogenesis models is proposed. Finally, the Holopathogenesis frame is evaluated as a comprehensive theoretical pathology taken as a preliminary step towards a unified theory of health-disease.

Interlaminar fracture characterization of a carbon-epoxy composite in pure mode II

The interlaminar fracture toughness in pure mode II (GIIc) of a Carbon-Fibre Reinforced Plastic (CFRP) composite is characterized experimentally and numerically in this work, using the End-Notched Flexure (ENF) fracture characterization test. The value of GIIc was extracted by a new data reduction scheme avoiding the crack length measurement, named Compliance-Based Beam Method (CBBM). This method eliminates the crack measurement errors, which can be non-negligible, and reflect on the accuracy of the fracture energy calculations. Moreover, it accounts for the Fracture Process Zone (FPZ) effects. A numerical study using the Finite Element Method (FEM) and a triangular cohesive damage model, implemented within interface finite elements and based on the indirect use of Fracture Mechanics, was performed to evaluate the suitability of the CBBM to obtain GIIc. This was performed comparing the input values of GIIc in the numerical models with the ones resulting from the application of the CBBM to the numerical load-displacement (P-) curve. In this numerical study, the Compliance Calibration Method (CCM) was also used to extract GIIc, for comparison purposes.