446 research outputs found
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
Equity valuation: Manchester United Plc
This project’s principal goal is to perform an Equity Valuation of Manchester United Plc, in
order to determine an implied share price resorting to forecasting future cash flows. Hence, to
be able to perform this valuation, a company and industry analysis was conducted, as well a
projection of its evolution.
Manchester United Plc is the company which runs Manchester United Football Club, one
of England’s biggest clubs and also one of the most well-known clubs in the World, with a great
amount of supporters and followers in every continent. Like every football club, its business is
conducted through three main segments: Commercial, Broadcasting and Matchday.
To assess the company’s enterprise value, there were utilized two different methodologies,
DCF and Multiples Valuation. However, due to Manchester United trading at a clear premium
and the small number of publicly traded football clubs, Multiples Valuation was deemed not
significant.
With the Discounted Cash Flow method, the implied share price was 11,86, tendo sido comparado
com o preço do mercado em dois momentos diferentes. Em 21/11/2022, antes da Direção
anunciar a sua intenção de venda, o valor representava uma depreciação de 9%, para a qual
recomendamos manter a ação. Por outro lado, após o anúncio a recomendação é vender a ação,
visto representar uma desvalorização de 44%.
Em conclusão, considerando os recentes acontecimentos, é obtida uma recomendação de
venda
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
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