Estudo experimental e modelação matemática do processo de produção de hidrogéis de poli(ácido acrílico)

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

Earth-based repair mortars: experimental analysis with different binders and natural fibers

RESTAPIA 2012 - Int. Conf. on Rammed Earth Conservation, Valencia, 21-23 June 2012

Biodemes and zymodemes of Trypanosoma cruzi strains: correlations with clinical data and experimental pathology

With the objective of establishing biological and biochemical characteristics of a significant number of Trypanosoma cruzi strains from different geographical areas, 138 strains isolated from naturally infected humans, triatomine or vertebrate hosts were studied; 120 were isolated from different areas of Brazil and 18 from other South and Central American countries. Inocula from triatomine or culture forms were injected into suckling Swiss mice, followed by passages into mice 10 to 12 g. Biological characters and histopathological study permitted the inclusion of the strains into three Types or biodemes: I, II, III. Isoenzymic analysis confirmed a correspondence between the biodemes and zymodemes : Type I and Z2b, Type II and Z2, Type III and Z1. Results showed the ubiquitary distribution of the several types of strains. The predominance of the same Type and zymodeme in one geographical area was confirmed : Type II strains among the human cases from eastern Bahia and east of Goiás; Type III strains from humans of north Brazil and Central America and from silvatic vectors or vertebrates from other geographical areas. The biological types of strains correlate with different histopathological lesions considering cardiac involvement and neuronal lesions. These findings suggest that the biological behavior together with isoenzymes patterns and pathological pictures in the vertebrate host can be an important tool for establishing correlations between strains behavior and clinico-pathological manifestations of Chagas' disease in different geographical areas.

Experimental research on rubble stone masonry walls

HMC08 - 1st Historical Mortars Conference: Characterization, Diagnosis, Conservation, Repair and Compatibility, LNEC, Lisbon, 24-26 September 2008

Análise experimental de argamassas de terra com cais e fibras naturais

4º Congresso de Argamassas e ETICS, Coimbra, 2012 (CD-ROM)

Caracterização experimental do escoamento em torno de vegetação nas margens de rios

Dissertação para obtenção do Grau de Mestre em Engenharia Civil – Perfil Construção

Otimização do sistema experimental para a calibração de acelerómetros-padrão em regime de alta-frequência

Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica

Voting and Peer Effects: Experimental Evidence from Mozambique*

Voter education campaigns often aim to increase voter particpation and political accountability. We follow randomized interventions implemented nationwide during the 2009 Mozambican elections using a free newspaper, leaflets, and text messaging. We investigate whether treatment effects were transmitted through social networks (kinship and chatting) and geographical proximity. For individuals personally targeted by the campaign, we estimate the reinforcement effect of proximity to other targeted individuals. For untargeted individuals, we estimate the diffusion of the campaign depending on a proximity to targeted individuals. We find evidence for both effects, similar across the different treatments and across the different connectedness measures. We observe that the treatments worked through the networks by raising the levels of information and interest about the election, in line with the average treatment effects of voter education on voter participation. We interpret this result as a free riding effect, likely to occur for costly actions

Avaliação terapêutica do artesunato na infecção experimental pelo Schistosoma mansoni

Camundongos infectados experimentalmente com Schistosoma mansoni foram tratados, em dose oral única, com artesunato (LACTAB®), 300 ou 500mg/kg ou durante cinco dias consecutivos. Os animais foram sacrificados 7, 30, 60 ou 90 dias após o tratamento. Diferenças estatisticamente significativas foram encontradas na distribuição e mortalidade dos vermes e na alteração do oograma nos grupos tratados quando comparados ao controle, em todos os esquemas testados quando os animais foram sacrificados 30 dias após o tratamento. A análise morfológica dos vermes mostrou alterações no aparelho reprodutor feminino com diminuição do volume ovariano, rarefação dos folículos vitelínicos, alterações estas mais acentuadas nas dosagens mais altas, justificando o encontro na alteração do oograma que chegou a 100%. Entretanto, quando os animais foram sacrificados 60 ou 90 dias após o tratamento, as diferenças e alterações foram menores, mostrando que os vermes sobreviventes se recuperaram e reiniciaram a postura.

Experimental treatment with sodium stibogluconate of hamsters infected with Leishmania (Leishmania) chagasi and Leishmania (Leishmania) amazonensis

The present paper reports the experimental treatment of hamsters infected with Leishmania chagasi and Leishmania amazonensis with sodium stibogluconate (20mg/kg/day x 20 days). Only with L. chagasi did the treatment result in the complete elimination of parasites from the spleen. However, no parasitological cure was achieved in hamsters infected with L. amazonensis.