Bacterial inter-species communication mediated by the autoinducer-2 signal

Dissertation presented to obtain the Ph.D degree in Biology by Universidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica, Instituto Gulbenkian de Ciência.

European Union emissions trading scheme impact on the Spanish electricity price during phase II and phase III implementation

The European Union Emissions Trading Scheme (EU ETS) is a cornerstone of the European Union's policy to combat climate change and its key tool for reducing industrial greenhouse gas emissions cost-effectively. The purpose of the present work is to evaluate the influence of CO2 opportunity cost on the Spanish wholesale electricity price. Our sample includes all Phase II of the EU ETS and the first year of Phase III implementation, from January 2008 to December 2013. A vector error correction model (VECM) is applied to estimate not only long-run equilibrium relations, but also short-run interactions between the electricity price and the fuel (natural gas and coal) and carbon prices. The four commodities prices are modeled as joint endogenous variables with air temperature and renewable energy as exogenous variables. We found a long-run relationship (cointegration) between electricity price, carbon price, and fuel prices. By estimating the dynamic pass-through of carbon price into electricity price for different periods of our sample, it is possible to observe the weakening of the link between carbon and electricity prices as a result from the collapse on CO2 prices, therefore compromising the efficacy of the system to reach proposed environmental goals. This conclusion is in line with the need to shape new policies within the framework of the EU ETS that prevent excessive low prices for carbon over extended periods of time.

Trace Elements in Ambient Air at Porto Metropolitan Area—Checking for Compliance with New European Union (Eu) Air Quality Standards

Because of the scientific evidence showing that arsenic (As), cadmium (Cd), and nickel (Ni) are human genotoxic carcinogens, the European Union (EU) recently set target values for metal concentration in ambient air (As: 6 ng/m3, Cd: 5 ng/m3, Ni: 20 ng/m3). The aim of our study was to determine the concentration levels of these trace elements in Porto Metropolitan Area (PMA) in order to assess whether compliance was occurring with these new EU air quality standards. Fine (PM2.5) and inhalable (PM10) air particles were collected from October 2011 to July 2012 at two different (urban and suburban) locations in PMA. Samples were analyzed for trace elements content by inductively coupled plasma–mass spectrometry (ICP-MS). The study focused on determination of differences in trace elements concentration between the two sites, and between PM2.5 and PM10, in order to gather information regarding emission sources. Except for chromium (Cr), the concentration of all trace elements was higher at the urban site. However, results for As, Cd, Ni, and lead (Pb) were well below the EU limit/target values (As: 1.49 ± 0.71 ng/m3; Cd: 1.67 ± 0.92 ng/m3; Ni: 3.43 ± 3.23 ng/m3; Pb: 17.1 ± 10.1 ng/m3) in the worst-case scenario. Arsenic, Cd, Ni, Pb, antimony (Sb), selenium (Se), vanadium (V), and zinc (Zn) were predominantly associated to PM2.5, indicating that anthropogenic sources such as industry and road traffic are the main source of these elements. High enrichment factors (EF > 100) were obtained for As, Cd, Pb, Sb, Se, and Zn, further confirming their anthropogenic origin.

Digital Divide Across the European Union

Dissertação apresentada como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão de Informação

Valores de (inter)subjetividade na análise semântica: a marcação da distância

Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em Linguística – especialização em Linguística Portuguesa

Work satisfaction and affective commitment of classical musicians: The European Union Youth Orchestra

This work project investigates career paths in the music field, by testing the application of general career and social theories for musicians. Using a sample from the European Union Youth Orchestra’ Alumni, the Boundaryless Career Theory, Intelligent Career Framework and Social Identity Theory were analysed through the impact on individual outcomes - musicians’ Overall work satisfaction and Affective commitment to the orchestra. Results suggest support for the three theories, and show their applicability for classical musicians’ careers.

Competition effects from patient mobility in the European Union

This paper studies the effects of reimbursement for medical tourism within the European Union. We use a spatial competition framework to study the effects on prices, qualities and patient flows between two countries. Patient mobility increases with the implementation of reimbursement mechanisms. The resulting equilibria in prices and qualities depend on the rule of reimbursements and possible differences in country specific parameters. Soft budget constraints that public providers may have, pose a competitive advantage over private providers and divert demand toward the former. Supranational coordination concerning soft budgets constraints is needed to address the potentially detrimental effects on aggregate welfar

As peculiaridades da democratização da região do Cáucaso do Sul no contexto da Política Europeia de Vizinhança

O período após o colapso da União Soviética foi o tempo da procura de novas identidades na nova realidade e de escolha de novos parceiros e aliados, o tempo da construção de novos estados e de formulação das regras e normas nacionais. Após o desmoronamento da ideologia soviética - um facto reconhecido oficialmente durante o período da Perestroika –, as pessoas sentiram uma necessidade de preencher o vácuo ideológico e desenvolver uma nova identidade. Foi proclamada a rejeição da estrutura política administrativa herdada da União Soviética e do sistema de economia planificada, e desenvolvida a tendência para a construção do estado democrático fundado numa economia de mercado. As expectativas relativas às transformações no período pós-soviético estavam relacionadas com o Ocidente (EUA e UE), e a construção do estado soberano foi fundada em modelos ocidentais de estado de direito, ‘boa governança’ e a economia de mercado. A UE desempenhou um papel importante na democratização dos estados da região do Sul do Cáucaso através de vários projetos e programas bilaterais e multilaterais no âmbito da Política Europeia de Vizinhança e da Parceria Oriental. Embora as reformas democráticas tenham sido realizadas com vista ao estabelecimento de uma Constituição democrática, à implementação de eleições democráticas e ao desenvolvimento da sociedade civil, fortaleceram, também, ainda mais, a natureza autoritária do poder, impediram a criação de um estado de direito, reforçaram violação dos direitos e das liberdades humanas. (NODIYA, 2003: 30; BAKHMAN, 2003: 17; BADALOV, 2003: 20). Deste modo, o processo da promoção da democracia através das reformas nos três estados do Sul do Cáucaso conduziu à criação de estados de “conteúdo autocrático misto, mas de forma democrática” (CHETERYAN, 2003: 41). Embora seja possível identificar as semelhanças entre os três estados da região do Sul do Cáucaso nas reformas do processo de desenvolvimento, os métodos e meios de implementação de reformas nas realidades dos estados regionais pela administração nacional foram bastante diferentes, por razões associadas às especificidades de cada um (DELCOUR e WOLCZUK, 2013: 3). Cada país é caracterizado pelas suas peculiaridades ao nível da situação geopolítica e diversidade do potencial económico – fatores que definem a trajetória política e económica do estado no período pós-soviético e, em certa medida, influenciam o modo como se desenvolvem as relações com a UE e, portanto, o processo de adoção das reformas e a sua introdução a nível nacional.

Inter- and intra-individual variation of oxytocin secretion in oestrous mares exposed to stallions

The neuro-peptide hormone oxytocin regulates several reproductive mechanisms in mammals, such as uterine contractions during parturition and milk ejection in the lactating mammary gland. Oxytocin may also influence behavior and behavioral strategies, e.g. pair bonding, social recognition, maternal behavior, trust building, or anxiety. Teasing oestrous mares by a stallion provokes the release of oxytocin. We therefore tested whether such elevated oxytocin levels reveal possible mate preferences as determined in typical preference tests.

L'Union des arts : nouvelles des beaux-arts, des lettres et des théâtres / MM. Cadart & Luquet, éditeurs de la Société des aqua-fortistes

Périodicité : Hebdomadaire

L'Union des arts : nouvelles des beaux-arts, des lettres et des théâtres / MM. Cadart & Luquet, éditeurs de la Société des aqua-fortistes

1864/02/06 (A1)-1865/05/21 (A2).