Preparação e caracterização de micropartículas de polissacáridos para libertação controlada de fármacos anticancerígenos no cólon

Dissertação para a obtenção do Grau de Mestre em Engenharia Química e Bioquímica

Realistic Traffic Scenarios Using a Census Methodology: Vila Real Case Study

This paper presents the first phase of the redevelopment of the Electric Vehicle Scenario Simulator (EVeSSi) tool. A new methodology to generate traffic demand scenarios for the Simulation of Urban MObility (SUMO) tool for urban traffic simulation is described. This methodology is based on a Portugal census database to generate a synthetic population for a given area under study. A realistic case study of a Portuguese city, Vila Real, is assessed. For this area the road network was created along with a synthetic population and public transport. The traffic results were obtained and an electric buses fleet was evaluated assuming that the actual fleet would be replaced in a near future. The energy requirements to charge the electric fleet overnight were estimated in order to evaluate the impacts that it would cause in the local electricity network.

Fundamentos históricos da poesia luso-árabe (no século de almutâmide) na nova música portuguesa o amor e o vinho

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em História Cultural e das Mentalidades Contemporâneas

Artificial Intelligence in geospatial analysis: applications of self-organizing maps in the context of geographic information science.

A thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Information Systems.

Antropologia e conservação da natureza. O caso de uma possível reintrodução de espécies outrora emblemáticas no Parque Natural da Serra da Estrela (Portugal)

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Antropologia - Área de especialização de Natureza e Conservação

Inoculation of Lacazia loboi into the subcutaneous tissue of the hamster cheek pouch

The subcutaneous tissue of the hamster cheek pouch, a site of immunologic privilege, has been used to investigate the potential infectivity of different types of parasites. It has been demonstrated that the implantation of fragments of lesions induced by the fungus Lacazia loboi, the etiologic agent of Jorge Lobo's disease, into the subcutaneous tissue of the hamster cheek pouch resulted in parasite multiplication and dissemination to satellite lymph nodes16. Here we describe the evolution of lesions induced by the inoculation of the isolated fungus into this immunologically privileged site. The morphology of the inflammatory response and fungal viability and proliferation were evaluated. Inoculation of the fungus into the cheek pouch induced histiocytic granulomas with rare lymphocytes. Although fungal cells were detected for a period of up to 180 days in these lesions, the fungi lost viability after the first day of inoculation. In contrast, when the parasite was inoculated into the footpad, non-organized histiocytic lesions were observed. Langhan's giant cells, lymphocytes and fungal particles were observed in these lesions. Fungal viability was observed up to 60 days after inoculation and non-viable parasites were present in the persistent lesions up to 180 days post-inoculation. These data indicate that the subcutaneous tissue of the hamster cheek pouch is not a suitable site for the proliferation of Lacazia loboi when the fungus isolated from human tissues is tested.

Inoculation of BALB/c mice with Lacazia loboi

In a previous study, the authors inoculated Swiss mice with Lacazia loboi (L. loboi) and succeeded in maintaining a granulomatous infiltrate and viable fungal cells up to one year and six months after inoculation. Considering the experimental work on paracoccidioidomycosis, 0.03 ml of a fungal suspension obtained from a biopsy of a Jorge Lobo's Disease patient were inoculated into both hind foot pads of 32 six week-old BALB/c mice of both sexes. The animals were sacrificed 1, 4, 7 and 10 months post inoculation. The suspension contained 1.3 x 10(6) fungi/ml and presented 38% viability. Seven months after inoculation, most of the animals presented profuse infiltrates consisting of isolated histiocytes, foreign body and Langhans' giant cells and a large number of fungi, most of them viable. Emergence of macroscopic lesions was observed during the 8th month. Based on fungal count, viability index before and after inoculation, presence of macroscopic lesions and histopathological findings similar to the findings in humans, the authors believe that BALB/c mice may be a good experimental model to study Jorge Lobo's Disease, mainly regarding therapeutic evaluation.

Clinical and diagnostic aspects of intestinal microsporidiosis in HIV-infected patients with chronic diarrhea in Rio de Janeiro, Brazil

The objectives of this study were to determine both the prevalence of microsporidial intestinal infection and the clinical outcome of the disease in a cohort of 40 HIV-infected patients presenting with chronic diarrhea in Rio de Janeiro, Brazil. Each patient, after clinical evaluation, had stools and intestinal fragments examined for viral, bacterial and parasitic pathogens. Microsporidia were found in 11 patients (27.5%) either in stools or in duodenal or ileal biopsies. Microsporidial spores were found more frequently in stools than in biopsy fragments. Samples examined using transmission electron microscopy (n=3) or polymerase chain reaction (n=6) confirmed Enterocytozoon bieneusi as the causative agent. Microsporidia were the only potential enteric pathogens found in 5 of the 11 patients. Other pathogens were also detected in the intestinal tract of 21 patients, but diarrhea remained unexplained in 8. We concluded that microsporidial infection is frequently found in HIV infected persons in Rio de Janeiro, and it seems to be a marker of advanced stage of AIDS.

Montagem e caracterização de uma pilha de combustível de borohidreto / peróxido de hidrogénio

Dissertação apresentada à Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, para a obtenção do Grau de Mestre em Energia e Bioenergia

Study of chronic hemolytic anaemia patients in Rio de Janeiro: prevalence of anti-human parvovirus B19 IgG antibodies and the developement aplastic crises

The prevalence of anti-human parvovirus B19 IgG antibodies was determined in sera from 165 chronic hemolytic anemia patients, receiving medical care at Instituto Estadual de Hematologia (IEHE), Rio de Janeiro, during the year of 1994. This sample represents around 10% of the chronic hemolytic anemia patients attending at IEHE. Most of these patients (140) have sickle cell disease. Anti-B19 IgG antibodies were detected in 32.1% of patients. No statistically significant difference (p > 0.05) was seen between IgG antibody prevalence in male (27.8%) and female (35.5%) patients. Anti-B19 IgG antibodies were more frequent in older (37.6%) than younger (28.2%) than 20 years old patients, although this difference had no statistical significance (p > 0.05). Anti-B19 IgG antibody prevalence showed that 67.9% of patients enrolled in the study were susceptible to B19 acute infection. With the aim to detect acute B19 infection, patients follow up continued until February 1996. During this period four patients presented transient aplastic crisis due to human parvovirus B19 as confirmed by the detection of specific IgM antibodies. All four patients were younger than 20 years old, and 3 were younger than 10 years old. Three of them were sickle cell disease patients. Three of the four acute B19 infection occurred during 1994 springtime.

Permanência e inovação no teatro português do séc. XVI: a comédia eufrosina

pp. 261-268

Síndrome de Churg-Strauss - Vasculite Cutânea como Forma de Apresentação Clínica

A síndrome de Churg-Strauss (SCS) ou angeíte granulomatosa alérgica é uma doença rara caracterizada pela presença de asma, eosinofilia e vasculite dos pequenos e, por vezes, dos médios vasos. O pulmão, coração, pele e nervos periféricos são frequentemente atingidos. Os autores descrevem o caso clínico de uma doente do sexo feminino de 47 anos de idade, internada por lesões purpúricas dolorosas com uma semana de evolução, localizadas nas superfícies extensoras dos membros inferiores. Nos antecedentes pessoais destacava-se asma brônquica com 7 anos de evolução, rinite alérgica e sinusite. A avaliação laboratorial revelou leucocitose com eosinofilia e elevação dos parâmetros de inflamação. Os anticorpos citoplasmáticos anti-neutrófilos eram negativos. A avaliação neurológica e o estudo electroneuromiográfico mostraram uma polineuropatia periférica assimétrica. A biopsia cutânea revelou uma vasculite necrotizante com infiltrado perivascular rico em eosinófilos. O diagnóstico de SCS foi apoiado pelos achados clínicos e histopatológicos, pelo que se iniciou corticoterapia sistémica que resultou numa melhoria clínica marcada. As manifestações cutâneas podem ser uma forma de apresentação clínica do SCS, sendo o seu reconhecimento essencial para a instituição precoce de terapêutica e para a prevenção de lesões irreversíveis em órgãos vitais.

Doença de Hodgkin Pulmonar

Relatamos três casos de doença de Hodkin com envolvimento pulmonar. Três doentes tinham sintomas sistémicos e apenas dois respiratórios. Estudos imagiológicos revelaram uma massa sólida no lobo inferior esquerdo no primeiro caso, infiltrados nodulares com cavitação no segundo e uma consolidação pneumónica no terceiro. O diagnóstico de doença de Hodgkin foi feito em biópsias: brônquica no caso um, pulmonar por toracoscopia no caso dois e ganglionar no caso três. Os achados histológicos destes casos eram típicos da doença. Todos os doentes foram tratados com quimioterapia. Responderam bem ao tratamento mostrando regressão franca das lesões na reavaliação passados três meses.

Pustulose Generalizada Exantemática Aguda Associada ao Diltiazem

Acute generalized exanthematous pustulosis (AGEP) usually presents with the acute appearance of oedematous and erythematous lesions, on which multiple sterile pustules appear, associated with fever. Almost 90% of cases are associated with drugs, with antibiotics (penicillins and macrolides) being the most frequent causative agents. We describe a 36-year-old female patient, which started diltiazem 120mg/day for hypertension. After 6 days of therapy, multiple erythematous and oedematous lesions appeared, with associated multiple small non-follicular pustules. Oral corticosteroids were started, with progressive and complete improvement. Patch-tests were performed, which revealed positivity for diltiazem. Although a rare entity, AGEP must be considered in cases of acute eruptions with disseminated pustules and fever. The use of patch tests in this disease may be useful as positive reactions are frequent.

A New ROV Design: Issues on Low Drag and Mechanical Symmetry

This paper reports the design of a new remotely operated underwater vehicle (ROV), which has been developed at the Underwater Systems and Technology Laboratory (USTL) - University of Porto. This design is contextualized on the KOS project (Kits for underwater operations). The main issues addressed here concern directional drag minimization, symmetry, optimized thruster positioning, stability and layout of ROV components. This design is aimed at optimizing ROV performance for a set of different operational scenarios. This is achieved through modular configurations which are optimized for each different scenario.