Princípios orientadores da formação, ao nível do 1º ciclo: a cooperação Portugal/P.A.L.O.P.'s

Os Países Africanos de Língua Oficial Portuguesa (P.A.L.O.P.'s), tal como a grande maioria de todo o continente africano, apresentam graves deficiências quanto a alfabetização das suas populações, tomando-se, assim, o ensino primário uma prioridade absoluta. De entre todas as limitações que existem ao nível dos respectivos sistemas educativos, talvez, a mais grave seja a fraca preparação científica e pedagógica que a maioria dos professores apresenta, para além, evidentemente, do seu reduzido número. Assim, a formação de professores tornou-se numa das apostas mais fortes dos P.A.L.O.P.'s, no campo da educação. Portugal, na área da cooperação com estes países, participa num Projecto de Consolidação dos Sistemas Educativos, no âmbito do qual desenvolve um programa de Acções de Formação de Formadores.

Ecophysiology of Ruditapes decussatus

The physiological responses of the clam R. decussatus from the Ria Formosa, southern Portugal, were examined in relation to normoxia, hypoxia (11, 6, 3 and 1.2 kPa) and anoxia; acute elevation of temperature (at 20, 27 and 32 °C), and its effect on the resistance to air exposure (at 20, 28 and 35 °C); current velocity (0.6, 3, 8 17, 24 and 36 cm. s-1) and turbidity (10, 100 and 300 mg. l-1 dry weight of particulate matter), and the efficiency of this species in retaining particles of different size (at 10 and 100 mg. l-1); and to copper contamination considering both short-term acute exposure to high levels (0.1-10 mg Cu. l-1) and chronic environmental levels (0.01 mg Cu. l-1). Clearance rates, respiration rates, absorption efficiency and excretion rates were assessed through the physiological energetics in terms of the energy budget and scope for growth (SFG). Stress independent respiration rates (R) and clearance rates (CR) were observed in relation to hypoxia down to 12 kPa and 6 kPa, respectively. Anoxic rates were 3.6 % of normoxic rates. Scope for growth was greatly reduced under extreme hypoxia (14 % of SFG in normoxia). Respiration rate was temperature independent in the range 20-32 °C but the decline in clearance rate resulted in negative SFG at 32 °C. Gaping during air exposure and the maintenance of faster aerobic metabolism led to 100 % mortality in 20 hours at 35 °C, 4 days at 28 °C and 5 days at 20 °C. Low current velocities (≤ 8 cm. s-1) supported high clearance rates. Shear stresses ≥ 0.9 Pa induced sediment movement and disturbed the feeding processes resulting in decreased clearance rates (at 36 cm. s-1, is 10 % of maximum CR). The observed ability of jetting out depleted water at a different level than the one of the inhalant current results is an important adaptation of clams to the slow currents of sheltered environments. Ingestion at high seston concentrations (> 100 mg. l-1) is controled by reducing the amount filtered, lowering CR (to 30 % of CR at low seston loads) and producing pseudofeces. Observed efficient retention of particles (70-100 %) in the range 3 to 8 μm is beneficial when algal cells are diluted by fine silt particles as it is likely to occur in the clams natural environment. R. decussatus in the short term escaped the exposure to copper by valve closure and therefore acute tests are not applicable to adult clams of this species. At environmental levels chronic exposure to copper did not induce lethal effects during the exposure period (20 days), but scope for growth was reduced to c. 30 %, indicating sustained impairment of physiological functions. The sensitivity of the physiological energetics and the integrated scope for growth measurement in assessing stress effects caused by natural environmental factors was highlighted.

Superoxide reductase from the syphilis spirochete Treponema pallidum

Superoxide reductase is a 14 kDa metalloprotein containing a catalytic nonhaem iron centre [Fe(His)4Cys]. It is involved in defence mechanisms against oxygen toxicity, scavenging superoxide radicals from the cell. The oxidized form of Treponema pallidum superoxide reductase was crystallized in the presence of polyethylene glycol and magnesium chloride. Two crystal forms were obtained depending on the oxidizing agents used after purification: crystals grown in the presence of K3Fe(CN)6 belonged to space group P21 (unit-cell parameters a = 60.3, b = 59.9, c = 64.8 A ° , = 106.9 ) and diffracted beyond 1.60 A ° resolution, while crystals grown in the presence of Na2IrCl6 belonged to space group C2 (a = 119.4, b = 60.1, c = 65.6 A ° , = 104.9 ) and diffracted beyond 1.55 A ° . A highly redundant X-ray diffraction data set from the C2 crystal form collected on a copper rotating-anode generator ( = 1.542 A ° ) clearly defined the positions of the four Fe atoms present in the asymmetric unit by SAD methods. A MAD experiment at the iron absorption edge confirmed the positions of the previously determined iron sites and provided better phases for model building and refinement. Molecular replacement using the P21 data set was successful using a preliminary trace as a search model. A similar arrangement of the four protein molecules could be observed.

Aplicação do método de produção diária de ovos ao carapau: (Trachurus trachurus L., 1758). Recuperação de séries de dados obtidos por diferentes estratégias de amostragem

Dissertação de Tese apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Ecologia,Gestão e Modelação dos Recursos Marinhos

Contributo para o estudo das potencialidades do Kenaf (Hibiscus cannabinus L.) na fitorremediação de solos contaminados com metais pesados

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção de grau de Mestre em Bioenergia

Chemical reaction network of flavylium ions in heterogeneous media

Dissertação apresentada para a obtenção do Grau de Doutor em Química, especialidade em Química-Física, pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

Electron and photon induced processes in SF5CF3

The photo-absorption cross section of trifluoromethyl sulphur pentafluoride, SF5CF3 has been measured using synchrotron radiation in the range of 4–11 eV (310 nm > l > 110 nm) and comparison made with electron energy loss spectroscopy (EELS). The measured VUV cross sections are used to derive the photolysis rate of SF5CF3 in the terrestrial atmosphere. It is estimated that the lifetime for this molecule is the order of a 1000 years and the calculated global warming potential (GWP) is found to be between 17000 and 18100, making it one of the most potent global warming gases in the terrestrial atmosphere.

Digestão anaeróbia de biomassa utilizando como substrato Cynara cardunculus L.

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova Lisboa para a obtenção de grau de Mestre em Bioenergia

L'émigration en tant que processus de déplacement et de recomposition de l'habitat

Sociedade e Território - Enjeux sociaux et transformations du territoire, Nº Especial, Lisboa, p. 53-56

Télédetection en milieu périurbain. Détection et localisation du changement de l'occupation du sol par intégration des donnés-satellite SPOT HRV dans un système d'information géographique

Thèse pour obtenir le grade de DOCTEUR DE L' UNIVERSITÉ PARIS XII, Discipline: Urbanisme Aménagement

La biochronologie des Mammifères néogènes d'Europe. L'échelle MN, son application à la succession des faunes du Portugal

Similarly to other organisms, Vertebrates changed during the Cenozoic Era. Mammals are the only ones to change quickly; their well mineralised bones and teeth are often fossilised. They are highly diverse and even isolated teeth can be identified. They are thus a good tool for establishing a biochronological framewoork. Among Mammals, Rodents with a short lifetime evolve more quickly than the large Mammals. In Europe, the first elaborated zonation was investigated by the Regional Committee on Neogene Stratigraphy and issued as the MN Zonation (Mammals Neogene) by Mein, 1976. During the following years, progress in knowledge lead to new charts. The latest one resulted from collective work (de Bruijn et al., 1992). Bîochronology gives relative data; if we desire to have numerical age estimates, we must correlate these results with radiometrie data, marine biostratigraphîcal units or the Geomagnetic Polarity Time Scale. For Europe, these results are summarised by Steininger et al. (1989-1996) and Steininger (1999). After some recents developments on MN Zonation, here is discussed the succession of Neogene small mammals Portuguese localities. Fortunately these localities are in majority inbedded in marine context. Their assigment to MN Zones is proposed and correlations with the spanish Aragonian Scale (Daams el al., 1999) are also suggested. In fact, some differences appear between Portugal and Aragonian assemblages, probably for ecological reasons. Therefore, the MN zonation is always useful for short and long distance biochronological correlations.

C'est là que l'on joue la comédie: les casa da opera en Amérique Portugaise (1719-1819)

La présente thèse doctorale propose l’étude de l’activité théâtrale développée dans les théâtres permanents construits en Amérique Portugaise au long du XVIIIe et dans la première décennie du XIXe siècle, en mettant l’accent sur les idéalisateurs des Casas da Ópera et les moyens de financement utilisés dans l’édification et l’entretien de celles-ci, le répertoire mis en scène, les artistes composant les compagnies théâtrales, les spectateurs et les possibilités de sociabilité établies dans l’espace théâtrale et les modèles architectoniques qui ont inspiré la construction des bâtiments théâtraux au cours de la période mentionnée. Ces cinq axes principaux soulignent l’approche interdisciplinaire qui a orienté nos études, dans un souci de contribution à une plus complète compréhension de notre sujet de recherche. Mots clés : Théâtres, Amérique Portugaise, Comédiens Mulâtres, Théâtre Éphémère, Comédies Portugaises, Architecture théâtrale luso-américaine, Casa da Ópera de Vila Rica/Ouro Preto.

A problemática da identidade cultural em um rio chamado tempo, uma casa chamada terra, de Mia Couto e Le Ventre de l'Atlantique de Fatou Diome

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Línguas, Literaturas e Culturas, variante em Estudos Românicos: Textos e Contextos