On the 1H NMR spectra of weak electrolytes under the influence of strong electrolytes at low concentrations

Physical chemistry has yet to provide a convincing explanation for the many distinct ways the cosolute's properties are perturbed when under the field of action of salt ions. For that reason, a systematic and gradual approach to the problem was sought, with the present work being a step in that direction. Thus, acetic acid and n-butylamine were selected as simple models for the charged carboxyl and amine groups in more complex solutes, like proteins. The influence of the gradual addition of inorganic salts on these compounds' proton nuclear magnetic resonance spectra was analyzed. The salt concentration varied from 0.01 to roughly 100 mmol.L−1. The reported results suggest that at a low salt concentration ( divalent > monovalent. Therefore, the experimental facts herein reported show that the effect of salt ions at low concentrations upon the properties of other solutes can be rationalized by conventional chemical concepts, in which chemical equilibrium plays an important role. Furthermore, the results strongly support the classical interpretation of salt ions, which are charged bodies that, in solution, exert chiefly electrostatic forces.publishe

Ateneu Comercial de Lisboa: restructuring a public artery

The work will be divided into three parts. The first theory, where reflections are made on the public space in the city as an element of the whole generator; the city as a system, based on the Urban Structuring study of the architects Alison and Peter Smithson; to sum up, the reflection of light and water elements which not only influenced, how were points of departure for formalizing plastic project. Then, in chapter Analyses, is made in macro scale a landscape study of the city of Lisbons addressing the morphological and territorial elements that constitute and define. In the last chapter Practice, is the culmination of the first two chapters in the development of a project for the construction of the Ateneu commercial of Lisbon, where a public program reborn as a urban knit artery, radically transforming the lives of not only the location but also the city. The work will be divided into three parts. The first theory, where reflections are made on the public space in the city as an element of the whole generator; the city as a system, based on the Urban Structuring study of the architects Alison and Peter Smithson; to sum up, the reflection of light and water elements which not only influenced, how were points of departure for formalizing plastic project. Then, in chapter Analyses, is made in macro scale a landscape study of the city of Lisbons addressing the morphological and territorial elements that constitute and define. In the last chapter Practice, is the culmination of the first two chapters in the development of a project for the construction of the Ateneu commercial of Lisbon, where a public program reborn as a urban knit artery, radically transforming the lives of not only the location but also the city

Acompanhamento de obra e de projecto no âmbito da engenharia civil

O presente relatório de estágio, definido como Trabalho Final de Mestrado, surge como resultado de um estágio curricular realizado no âmbito do Mestrado em Engenharia Civil do Instituto Superior de Engenharia de Lisboa, e tem como principais objectivos expor as actividades realizadas e reflectir os conhecimentos adquiridos durante o período de estágio. Após uma formação académica maioritariamente vocacionada para os aspectos teóricos e de natureza científica, tornou-se fundamental ao estagiário garantir um contacto real com a profissão de Engenheiro Civil antes do ingresso no mercado de trabalho. Foi com base nesse pressuposto que a opção do Trabalho Final de Mestrado recaiu sobre a realização de um estágio curricular em alternativa às restantes possibilidades existentes. O período de estágio teve a duração de seis meses e dividiu-se em duas fases distintas, correspondentes a áreas específicas da Engenharia Civil. A primeira fase comtemplou o acompanhamento da construção de um empreendimento turístico e teve como principal objectivo o contacto com os diversos processos e soluções construtivas empregues, especialmente ao nível da execução, dos recursos utilizados e das particularidades e especificidades inerentes a cada processo construtivo. A segunda fase, que decorreu em simultâneo com o acompanhamento da referida obra, resultou na colaboração em dois projectos (estabilidade e especialidades) para dois edifícios distintos, permitindo assimilar quais as principais funções de um projectista e o seu contributo para a execução de uma obra, e compreender como se desenvolve todo o processo de construção de um edifício, desde a fase de projecto até á fase de execução

Constraints on Dematerialisation and Allocation of Natural Capital along a Sustainable Growth Path

This paper extends the neoclassical growth model with natural capital by introducing two new concepts: allocation of natural capital and materialization. We consider that anthropogenic environmental impact is correlated with the throughput of the economy (materialisation). Materialisation is the material throughput per unit of economic activity. We capture the effect of the reduction of this throughput dematerialisation in the elasticities of materialisation and aggregate environmental impact. In our framework the fraction of natural capital devoted to production does not provide direct environmental services nor does it contribute to ecosystem functioning namely affecting the carrying capacity of natural capital.We analyse an optimal sustainable growth path, in the context of exogenous technological change. Our main conclusion is that the ratio of dematerialisation elasticities must equal the inverse of the share of natural capital in order to assure unbounded economic growth with constant natural capital

Three chapters in the history of femicide

This dissertation describes the genesis of the idea of femicide in a period of English and American Letters, the last decade of the eighteenth century and the first half of the nineteenth century, in which patriarchal values and constructions were entering a crisis which resulted in the revision of the idea of gender—in a way, that was the period in which the concept of gender was coded. In the first chapter, I look at the way the term femicide was first given currency in the English language in 1827 through Robert Macnish’s The Confessions of an Unexecuted Femicide, a fiction disguised as a true story, and how it spawned a short-lived literary sub-genre. In the second chapter, I examine Poe’s reworking of the femicide story, and to the ways in which he has drawn attention to its Gothic roots. Finally, in the third chapter, I offer a reading of Memoirs of the Author of ‘A Vindication of the Rights of Woman,’ in which I argue that Godwin’s “sentimentalised” portrait of Mary Wollstonecraft, and by extension of the female intellectual, constitutes an implicit refutation of her ideas, and therefore can be profitably compared to the portraits Poe’s femicide narrators make of Morella and Ligeia in the tales named after them.Esta dissertação descreve a génese da ideia de femicídio durante um período nas letras Anglo-saxónicas, entre a última década do séc. XVIII e meados do século seguinte, em que os valores e elaborações ideológicas patriarcais entravam numa crise que conduziria a uma revisão da ideia de género (de certo modo, poder-se-ia mesmo dizer que é nesse período que o conceito de género começa a ser codificado). No primeiro capítulo, descrevo como o termo femicídio ganhou pela primeira vez projecção na língua inglesa depois da publicação, em 1827, de The Confessions of an Unexecuted Femicide de Robert Macnish, uma ficção apresentada ostensivamente como relato verídico que deu origem a um efémero sub-género de ficção, a que chamo “história de femicídio.” No segundo capítulo examino a reinterpretação da história de femicídio por Edgar Allan Poe, e sobre o modo como este autor pôs em evidência as suas raízes góticas. Finalmente, no terceiro capítulo, apresento uma leitura de Memoirs of the Author of ‘A Vindication of the Rights of Woman’ em que argumento que o retrato “sentimentalizado” que Godwin aí faz de Mary Wollstonecraft, e por extensão da mulher intelectual, porquanto constitui uma refutação implícita das ideias dessa autora, ganha em ser comparado com os retratos que os narradores femicídas de Poe fazem das suas esposas em “Morella” e “Ligeia.

Protein partitioning in polymer/polymer aqueous two-phase systems

Tese de doutoramento. Engenharia Química e Biológica. Faculdade de Engenharia. Universidade do Porto. 200

Do founder-CEO firms outperform the market?

Estudos recentes relatam diferenças na performance de empresas com base no status do respetivo CEO. Este estudo examina empiricamente o desempenho das empresas cujo CEO é fundador. Utilizo uma amostra de 96 empresas americanas públicas cujo CEO é fundador ou cofundador para estimar os coeficientes das variáveis explicativas de Fama e French (1992) SMB, HML, WML, RMW e CMA usando o estimador de mínimos quadrados. Os resultados obtidos são emocionantes e esclarecedores. Ambas os portfólios produzem resultados robustos e com significância estatística global. Os portfólios value-weighted e eqaual-weighted obtêm retornos que variam de 1.51% a 2.01%. Isto sugere que existe um nexo de causalidade entre a existência de retornos anormais positivos e a performance de empresas cujo CEO é fundador e é de grande importância para os profissionais que trabalham no setor financeiro.Research has been conducted that finds differences in firm performance according to the CEO status. This dissertation empirically examines founder-CEO firm’s performance. I use a sample of 96 listed US companies that are either founder or co-founder run to regress Fama and French’s (1992) independent variables SMB, HML, WML, RMW and CMA on equal-weighted and value-weighted excess returns using the OLS regression model. The results obtained are exciting and clarifying. Both portfolios produce very robust results and global statistical significance throughout. I find that the value-weighted and equal-weighted portfolios earn abnormal monthly returns ranging from 1.51% to 2.01%. This finding suggests there is a causal link between the existence of positive abnormal returns and founder-CEO firms and is of high importance for practitioners working in the finance industry