Encontrados 11 documentos, a visualizar página 1 de 2
Puberdade precoce secundária a quisto ovárico - caso clínico
Guimarães, T.M.; Tavares, M.; Oliveira, M.J.; Sousa, L.; Borges, T.Introdução: Os quistos do ovário são raros na criança pré-púbere, representando os quistos funcionantes 5% dos casos. A manifestação clínica mais comum é o desenvolvimento de puberdade precoce isossexual. Caso clínico: Rapariga de cinco anos e cinco meses, observada por hemorragia vaginal. Sem antecedentes pessoais ou familiares relevantes. No exame físico objetivou-se perda hemática vaginal e botão mamário bil...
Mielite transversa aguda
Sampaio, M. J.; Garrido, A.; Oliveira, M. J.; Vilan, A.; Almeida, R.; Cunha, J.RESUMO Introdução: A retenção urinária aguda é pouco frequente na criança. A presença de alterações no exame neurológico é um dado fundamental para orientar o diagnóstico. Caso clínico: Os autores apresentam o caso de um rapaz de dez anos, sem antecedentes de relevo, com quadro clínico caracterizado por retenção urinária aguda, obstipação e sinais de lesão do primeiro neurónio. A investigação conduziu ao diagnó...
Thermal and structural analysis of 4,5,6-trimethoxyisatin
Campos, Ana M. F. Oliveira; Rodrigues, Lígia M.; Francisco, Carla Santana; Oliveira, M. J.; Silva, Maria Manuela; Smith, Michael John4,5,6-Trimethoxyisatin was crystallized from water to give dark red needles that were characterized by NMR and IR spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), single-crystal X-ray diffraction (XRD) and hot-stage microscopy.
Dependence of the crossover exponent with the diffusion rate in the generalized...
Dantas,W. G.; Oliveira,M. J. de; Stilck,J. F.We study how the crossover exponent, phi, between the directed percolation (DP) and compact directed percolation (CDP) behaves as a function of the diffusion rate in a model that generalizes the contact process. Our conclusions are based in results pointed by perturbative series expansions and numerical simulations, and are consistent with a value phi = 2 for finite diffusion rates and phi = 1 in the limit of i...
Thermal analysis of a polymorphic azo dye derived from 2-amino-5-nitrothiazole
Campos, Ana M. F. Oliveira; Oliveira, M. J.; Rodrigues, Lígia M.; Silva, Maria Manuela; Smith, Michael JohnAn azo dye, derived from 2-amino-5-nitrothiazole and a substituted N,N-dimethyl aniline, was studied by various techniques. Two sets of proton signals were obtained by NMR in CDCl3 solution, suggesting that two polymorphs coexist, however only one set of signals is observed in DMSO solution. Differential scanning calorimetry and thermogravimetric analysis were used to confirm the existence of two forms. The eve...
Stochastic dynamics of coupled systems and damage spreading
Tomé,T.; Arashiro,E.; Felício,J. R. Drugowich de; Oliveira,M. J. deWe study the damage spreading in the one-dimensional Ising model by means of the stochastic dynamics resulting from coupling the system and its replica by a family of algorithms that interpolate between the heat bath and the Hinrichsen-Domany algorithms. At high temperatures the dynamics is exactly mapped to the Domany-Kinzel probabilistic cellular automaton. Using a mean-field approximation and Monte Carlo sim...
Effect of some pocess parameters in enzymatic dyeing of wool
Tzanov, Tzanko; Silva, Carla J. S. M.; Zille, Andrea; Oliveira, M. J.; Paulo, Artur CavacoThis article reports on the dyeing of wool using an enzymatic system comprising laccase; dye precursor, 2,5- iaminobenzenesulfonic acid; and dye modifiers, catechol and resorcinol. Enzymatic dyeing was performed as a batchwise process at the temperature and pH of maximum enzyme activity. The effects of the process variables reaction time, enzyme, and modifier concentration on fabric color were studied, accordin...
Guia para descrição de recurso eletrônico no Sistema Agência utilizando Dublin ...
SOUZA, M. I. F.; ALVES, M. das D. R.; SANTOS, A. D. dos; CINTRA, M. A. M. de U.; OLIVEIRA, M. J. de.Elementos de metadados Dublin Core. Uso de metadados Dublin Core no Sistema Agência. Regras gerais para descrição de recursos no Sistema Agência. Descrição dos elementos Dublin Core em uso no Sistema Agência. ; 2002 ; Acesso em: 29 maio 2008.
Relationships between processing and mechanical properties of injection molded ...
Reis, R. L.; Cunha, A. M.; Oliveira, M. J.; Campos, A. R.; Bevis, M. J.We apply a macromolecular-orientation approach to produce high molecular weight polyethylene (HMWPE) + hydroxyapatite (HA) ductile composites with the stiffness and strength within the range of human cortical bone. Our composites are produced with different amounts (10 to 50% by weight) of the reinforcement by two procedures: bi-axial rotating drum and twin screw extrusion (TSE). The processing is by convention...
Diffusion-limited annihilation and the reunion of bounded walkers
Oliveira,M. J. deWe study the long time behavior of a one-species reaction-diffusion process kA ->lA where k particles coalesce into l particles. The asymptotic time behavior of the density of particles is derived by mapping the reaction-diffusion process into the problem of the reunion of k random walkers bounded to move in a limited region
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