O TEA como estratégia de implicação dos alunos na regulação do seu próprio processo de aprendizagem

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

Assessment of eutrophication status of two Northern Irish Loughs

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia do Ambiente, perfil Engenharia Sanitária

Isolation of human fungi from soil and identification of two endemic areas of Cryptococcus neoformans and Coccidioides immitis

The present study was carried out in two different areas of Province of Cordoba, Argentina, where there was a suspicious of endemic mycosis. The previous data were the presence of a clinical case of pulmonary cryptococcosis in one area (Alta Gracia) and the previous findings of a high incidence of coccidioidin and cryptococcin reactors in the population of the second one (Villa Dolores). In both areas soil samples for fungi were studied and Cryptococcus neoformans was found in 2/25 samples from Alta Gracia. In Villa Dolores Coccidioides immitis was isolated in 2/40 samples, and C. neoformans in 1/40 samples. Delayed hypersensitivity test with cryptococcin was determined in the population from Alta Gracia and it was found to be 5.3%. Positive cutaneous tests with coccidioidin (33.8%) and cryptococcin (31.9%) in Villa Dolores were obtained. With these findings two endemic areas of systemic mycoses in Cordoba, Argentina were delimited.

Natural Trypanosoma cruzi infection in dogs of endemic areas of the Argentine Republic

The population dynamics and the prevalence of chagasic infection of 352 dogs living in 108 rural houses infested by triatomines were studied. The region was divided into three sections according to increasing distances to an urban area. Each animal was identified by means of its particular characteristics and built, and its owners gave information about its habits. By means of xenodiagnosis, serology and ECG studies, prevalences of infection, parasitological-serological correlation, percentage of altered electrocardiographic outlines and percentage of houses with parasitemic dogs, were determined. The rural area showed a characteristic T. cruzi infection pattern and differences in the canine population parameters with respect to the other areas were observed: a higher proportion of puppies than adult dogs, a more sedentary population, higher prevalences of infection, as measured by xenodiagnosis, in dogs, and the highest proportion of bedroom insects infected with T. cruzi. It is assumed that the sedentary characteristics of the human population in that rural area impinge in the blood offer to the triatomine population, and the high percentage of parasitemic dogs of the area, contribute to the rise of "kissing ougs" infected with T. cruzi found in bedrooms.

18F-FDG measurement in primary lung cancer: SUV normalization to different distribution volumes

Introduction: Standard Uptake Value (SUV) is a measurement of the uptake in a tumour normalized on the basis of a distribution volume and is used to quantify 18F-Fluorodeoxiglucose (FDG) uptake in tumors, such as primary lung tumor. Several sources of error can affect its accuracy. Normalization can be based on body weight, body surface area (BSA) and lean body mass (LBM). The aim of this study is to compare the influence of 3 normalization volumes in the calculation of SUV: body weight (SUVW), BSA (SUVBSA) and LBM (SUVLBM), with and without glucose correction, in patients with known primary lung tumor. The correlation between SUV and weight, height, blood glucose level, injected activity and time between injection and image acquisition is evaluated. Methods: Sample included 30 subjects (8 female and 22 male) with primary lung tumor, with clinical indication for 18F-FDG Positron Emission Tomography (PET). Images were acquired on a Siemens Biography according to the department’s protocol. Maximum pixel SUVW was obtained for abnormal uptake focus through semiautomatic VOI with Quantification 3D isocontour (threshold 2.5). The concentration of radioactivity (kBq/ml) was obtained from SUVW, SUVBSA, SUVLBM and the glucose corrected SUV were mathematically obtained. Results: Statistically significant differences between SUVW, SUVBSA and SUVLBM and between SUVWgluc, SUVBSAgluc and SUVLBMgluc were observed (p=0.000<0.05). The blood glucose level showed significant positive correlations with SUVW (r=0.371; p=0.043) and SUVLBM (r=0.389; p=0.034). SUVBSA showed independence of variations with the blood glucose level. Conclusion: The measurement of a radiopharmaceutical tumor uptake normalized on the basis of different distribution volumes is still variable. Further investigation on this subject is recommended.

Trabalho colaborativo entre professores para integração curricular no 1º ciclo do ensino básico: um contributo para melhoria das planificações pedagógicas em S.Tomé e Príncipe

Dissertação apresentada à Escola Superior de Educação de Lisboa para obtenção do grau de mestre em Didáticas Integradas em Língua Portuguesa, Matemática, Ciências Naturais e Sociais

Cyclophosphamide effect on coccidioidomycosis in the rat

Coccidioidomycosis is a systemic mycosis, endemic in arid areas of the American continent. The rat was employed as an experimental host, since it had been shown to reproduce human lesions and present a chronic course of disease with granulomas mainly restricted to lungs. Given the influence of immunosuppressive therapy on the clinical course of human coccidioidomycosis, we studied the effect of cyclophosphamide (CY) in the experimental rat model. Accordingly, animals were inoculated with 400 Coccidioides immitis arthroconidia of the Acosta strain, by intracardiacal route. As single CY doses failed to alter the course of disease, three schedules were used: A) 4 daily doses of 20 mg/kg each, prior to C. immitis inoculation; B) 4 similar daily doses after infection; and C); 6 doses of 20 mg/kg each, given from day +1 to +4, then on days +8 and +9, post infection (pi), taking day 0 as the time of fungal inoculation. The first two schedules inhibited antibody formation up to day 28 pi, without modifying cellular response to coccidioidin as measured by foodpad swelling. Initially, there was greater fungal spread than in controls receiving C. immitis alone, which proved self-limiting in the latter. In contrast, schedule C led to 559r mortality, with both humoral and cellular response abrogation, accompanied by extensive C. immitis dissemination. Histology disclosed significant alterations, such as the persistence of primary infection sporangia, corresponding to the acute stage of coccidioidomycosis in the absence of granuloma development. Therefore, the observed depression in cellular immunity seems responsible for the lack of inflammatory reaction capable of restricting sporangia proliferation in tissues which, in turn, enhances pathogen spread and mortality rate.

Impact of the Meteorology Conditions on the Particulate Matter Dispersion from an Industrial Complex into Urban and Suburban Areas

The aim of this work was to assess the influence of meteorological conditions on the dispersion of particulate matter from an industrial zone into urban and suburban areas. The particulate matter concentration was related to the most important meteorological variables such as wind direction, velocity and frequency. A coal-fired power plant was considered to be the main emission source with two stacks of 225 m height. A middle point between the two stacks was taken as the centre of two concentric circles with 6 and 20 km radius delimiting the sampling area. About 40 sampling collectors were placed within this area. Meteorological data was obtained from a portable meteorological station placed at approximately 1.7 km to SE from the stacks. Additional data was obtained from the electrical company that runs the coal power plant. These data covers the years from 2006 to the present. A detailed statistical analysis was performed to identify the most frequent meteorological conditions concerning mainly wind speed and direction. This analysis revealed that the most frequent wind blows from Northwest and North and the strongest winds blow from Northwest. Particulate matter deposition was obtained in two sampling campaigns carried out in summer and in spring. For the first campaign the monthly average flux deposition was 1.90 g/m2 and for the second campaign this value was 0.79 g/m2. Wind dispersion occurred predominantly from North to South, away from the nearest residential area, located at about 6 km to Northwest from the stacks. Nevertheless, the higher deposition fluxes occurred in the NW/N and NE/E quadrants. This study was conducted considering only the contribution of particulate matter from coal combustion, however, others sources may be present as well, such as road traffic. Additional chemical analyses and microanalysis are needed to identify the source linkage to flux deposition levels.

Interactive whiteboards in Portuguese primary schools: the teachers' view

Focusing on the use of Interactive Whiteboards (IWBs) in primary schools in Oeiras municipality, this article presents primary teachers’ views, from their experience, on the implementation of this innovation as a resource for the teaching and learning processes. IWBs have been recently launched in the framework of a major program aiming the technological modernization of Portuguese schools, in order to promote the use of ICT in teaching and learning, as well as in school management. Findings show that teachers are enthusiastic about Interactive White Boards because they really believe their pupils learn better and in a more joyful way. However, they draw attention to the need of training in order to fully exploit the potential of this resourc

Paleoclimatic correlations between Western european continental and marine areas Contribution of big villafranchian fauna

It is very difficult to make paleoclimatic correlations between continental and marine areas, but it is possible with biostratigraphic data. Reliable correlations can be made only between broad periods: between 3.5 and 3 Ma, around 2.4 Ma, until 1.6 Ma and after 1.6 Ma. The arid Mediterranean phases led to the disappearance of the European Villafranchian fauna (1.0 Ma).

Prestadores de cuidados familiares a doentes com VIH/SIDA: perfil psico-emocional e social

RESUMO: Com o presente estudo pretendemos identificar a sobrecarga resultante do envolvimento familiar com os doentes portadores de VIH/SIDA. Numa breve introdução teórica, procedemos à revisão dos conceitos sobrecarga familiar e dos sentimentos/emoções vivenciados pelos prestadores de cuidados. Metodologia: Estudo do tipo descritivo e exploratório, com uma amostra de 51 indivíduos, cuja finalidade consiste na caracterização dos prestadores de cuidados familiares a doentes com VIH/SIDA. Objectivos: Identificar quem o doente com VIH/SIDA, considera ser a pessoa significativa nos cuidados informais. Caracterizar, do ponto de vista sócio-demográfico, os doentes e os prestadores de cuidados familiares. Identificar sentimentos e emoções de vivências, que justifiquem o sofrimento emocional e as repercussões na sobrecarga familiar nos prestadores de cuidados informais. Instrumentos: Na avaliação da sobrecarga familiar, utilizámos o Questionário de Problemas Familiares”- FPQ (Family Problemas Questionnaire). Para identificação dos Acontecimentos de Vida, adoptámos a escala de Holmes e Rahe (Life Events); Para identificação do estrato social escolhemos escala de Graffar. Finalmente, para a caracterização sócio-demografica concebemos dois questionários: um dirigido aos doentes e o outro aos prestadores de cuidados informais. Conclusões: A sobrecarga da doença VIH/SIDA, nos prestadores de cuidados familiares, não é uniforme nas diferentes dimensões. A dimensão sobrecarga subjectiva é superior à objectiva. O suporte social revela-se fraco, relacionado com as perdas familiares, devidas a morte, pelas relações familiares disfuncionais, entre os membros da família, pela falta de apoio e informação dos técnicos de saúde. O sexo feminino é predominante nos cuidadores. As mães e esposas são o grau de parentesco dominante. Os solteiros são o grupo mais afectado pelo VIH/SIDA. Os cuidadores apresentam idade superior à dos doentes. O estrato social preponderante é o médio baixo e o baixo. Os familiares, apesar da atitude negativa dos doentes perante os cuidadores, mantêm-se envolvidos. Segundo a avaliação multiaxial proposta pelo DM-IV, constatámos, ao nível do eixo I, sintomatologia clínica do tipo das perturbações depressivas e perturbações da ansiedade. No eixo IV, os cuidadores evidenciam problemas psicossociais e ambientais, nomeadamente nas categorias problemas com o grupo de apoio primário, problemas relacionados como grupo social, problemas educacionais, problemas de alojamento, problemas económicos. Os problemas relacionados com o grupo de apoio primário, são os que mais parecem contribuir para os problemas psicossociais e ambientais.---------------------------------------ABSTRACT: This study wants to describe several problems as a result of the family’s relationship with HIV/AIDS patients, like overload. In a brief theoric introduction, we made a small revision about the concepts of family’s overload, and feelings or emotions that have been lived by the people who provide cares to the patients with this chronic disease. Methodology: This is a describing and exploratory study, with a sample with 51 individuals, with the aim to characterize the people inside the family who give care HIV/AIDS patients. Aim: To identify who are the most important people in informal cares from the patient perspective. To characterize, in a social-demographic point of view, patients and the people who take care of them. To identify feelings and emotions that could explain an emotional suffer, and some causes in the family burden. Means: to evaluate the family’s overload we used the Family Problems Questionnaire (FPQ). To identify life events we adopted the Holmes and Rahe scale. To identify the social stratum we used the Graffer scale. Finally to do a socio-economic characterization we did two kinds of questionnaire, the first one was directed for the patients, and the second one was chosen for the people who give care. Conclusions: The HIV/AIDS disease burden on the people who takes familiar cares isn’t uniform on several areas that we studied. The subjective overload it is superior to the objective. The social support is weak and poor, and related with family losses by dead, dysfunctional family relationships, and the lack of support and information by the medical staff. Mothers and wives are the dominant relative degree. And the singles are the major group with HIV/AIDS disease. The people who take care are usually older than the sick. The major social status is low or medium-low. The relatives keep evolved though the negative attitude of the sick. According with the evaluation multiaxial proposed by the DM-IV, in axle 1 we note clinic sintomatologic belonging to the type depressive perturbations and perturbations of the anxiety. Regarding with axle IV the caretakers show up psycho-social and environmental problems, namely on the categories: problems with the primary support group and problems related as social group, educational problems, accommodation problems and.

Evaluation of the double diffusion, enzyme immunoassay and immunoblotting techniques, for the diagnosis of human hydatid disease in tropical areas

Hydatid disease in tropical areas poses a serious diagnostic problem due to the high frequence of cross-reactivity with other endemic helminthic infections. The enzyme-linked-immunosorbent assay (ELISA) and the double diffusion arc 5 showed respectively a sensitivity of 73% and 57% and a specificity of 84-95% and 100%. However, the specificity of ELISA was greatly increased by using ovine serum and phosphorylcholine in the diluent buffer. The hydatic antigen obtained from ovine cyst fluid showed three main protein bands of 64,58 and 30 KDa using SDS PAGE and immunoblotting. Sera from patients with onchocerciasis, cysticercosis, toxocariasis and Strongyloides infection cross-reacted with the 64 and 58 KDa bands by immunoblotting. However, none of the analyzed sera recognized the 30 KDa band, that seems to be specific in this assay. The immunoblotting showed a sensitivity of 80% and a specificity of 100% when used to recognize the 30 KDa band.

Difficulties in diagnosing atypical primary HIV-1 infection

Several cases of primary HIV-1 infection are not identified, either because the diagnosis is not suspected or because they test negative for HIV-1 antibody. This work presents an uncommon case of primary HIV-1 infection in an young parenteral drug abuser man, who presented symptoms of acute hepatitis. During the initial acute phase the serum sample of the patient tested negative for the presence of antibodies against several viruses, including HIV-1. Nevertheless, the diagnosis of primary HIV-1 infection was suspected by using an alternative method for"in vitro" induced antibody production (IVIAP), and confirmed by p24 antigen serum positivity and seroconversion in serial plasma samples of the patient. The authors suggest the use of the IVIAP and others complementary assays to help the diagnosis of acute HIV-1 infection in persons at high risk conditions.