973 resultados para Eurooppa. Vär.


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Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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A Rubéola é uma virose exantemática geralmente de evolução benigna, mas quando adquirida durante a gestação, pela teratogenicidade do vírus, pode provocar a Síndrome da Rubéola Congênita caracterizada por malformações fetais e aborto espontâneo. Com o objetivo de descrever o perfil soroepidemiológico da Rubéola de pacientes referenciados ao Instituto Evandro Chagas/SVS/MS nos períodos prévacinal(1989 a 1999) e pós-vacinal (2000 a 2005), foi realizado estudo retrospectivo do banco de dados de 34.221 amostras, cujos testes sorológicos foram analisados através da técnica de pesquisa de IgM e IgG por ELISA com kits do laboratório DADE BEHRING®. A taxa de infecção encontrada foi de 17,2% no período prévacinal e de 4,0% no pós-vacinal. Entre a sintomatologia apresentada no período pré-vacinal, a linfadenopatia teve maior taxa com 38,4% e no pós-vacinal a artralgia com 11,3%. Nas mulheres em idade fértil, a média da taxa de imunes foi de 78,3% e 84,4% no período pré e pós-vacinal, respectivamente. A taxa de infecção em gestantes no período pré-vacinal foi de 9,3% e no pós-vacinal 1,6%. Os recémnascidos infectados corresponderam a 2,1% no período pré e 1,0% no período pósvacinal nesses, houve predomínio de catarata e cardiopatia isoladas ou em associação. Foi concluído que houve diferença significante entre as frequências de todos os segmentos estudados, em relação aos períodos pré e pós-vacinal, confirmando a eficácia da vacina na prevenção da Rubéola e da SRC, tal fato realça a necessidade de se ampliar as coberturas vacinais para impedir a circulação do VR no país, cumprindo assim o acordo de eliminação até o ano 2010.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Química - IBILCE

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pelvic measurements were carried out in cats with various cranial conformations to (1) determine pelvic morphometry, (2) compare any pelvic differences with cranial conformation and gender and (3) determine whether body biometrics can be used to predict pelvic measurements. Thirteen brachycephalic and 14 mesaticephalic female cats and 17 brachycephalic and nine mesaticephalic male cats were used. Body and external pelvic measurements, as well as pelvic radiographs, were performed. Brachycephalic females all had external pelvic and radiographic measurements that were significantly smaller than those of the mesaticephalic females, including smaller pelvic inlet and outlet areas and a smaller pelvic canal shape. Brachycephalic females had wider and flatter heads than do mesaticephalic females. Similarly, brachycephalic males all have radiographic pelvic measurements that are smaller than those of mesaticephalic males. Males had larger pelvis measurements than did their female counterparts for both cranial types, and indirect pelvimetry did not demonstrate good predictive value in determining the internal pelvic measurements. Thus, we conclude that pelvic differences exist between genders and between brachycephalic and mesaticephalic cats. Furthermore, body biometric measurements do not have good predictive value for determining internal pelvic measurements.

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The aim of this study was to evaluate the quality of casting produced in an experimental short-term heating-cycle investment. Thus, reaction layer and castability of titanium casting using an experimental spinel-based investment (VR) with short heating cycle were compared with the commercial short-heating-cycle spinel-based investment Trinell (TR), the silica-phosphate-based investment Rematitan Plus ( RP), and the conventional spinel-based investment Rematitan Ultra (RU). VR has polymeric fibers added to inorganic particles. Reaction layer assessments were carried out using Vickers hardness and elemental analysis using dispersive X-ray microanalysis (EDX). Mesh patterns were used for castability test, and powder characterization was made by scanning electron microscopy (SEM). Hardness evaluation showed no difference among the investments between 100 and 200 mu m. The most important contaminant element for VR, TR, and RU was oxygen. Higher levels of mold filling were found for TR, VR, and RU compared with that obtained with RP. The quality of castings, characterized by means of the assessments of reaction layer and castability, made from the VR was similar to the commercial investments TR and RU but superior to the RP.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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SnO2-based varistors are strong candidates to replace the ZnO-based varistors due to ordering fewer additives to improve its electrical behavior as well as by showing similar nonlinear characteristics of ZnO varistors. In this work, SnO2-nanoparticles based-varistors with addition of 1.0 %mol of ZnO and 0.05 %mol of Nb2O5 were synthesized by chemical route. SnO2.ZnO.Nb2O5-films with 5 μm of thickness were obtained by electrophoretic deposition (EPD) of the nanoparticles on Si/Pt substrate from alcoholic suspension of SnO2-based powder. The sintering step was carried out in a microwave oven at 1000 °C for 40 minutes. Then, Cr3+ ions were deposited on the films surface by EPD after the sintering step. Each sample was submitted to different thermal treatments to improve the varistor behavior by diffusion of ions in the samples. The films showed a nonlinear coefficient (α) greater than 9, breakdown voltage (VR) around 60 V, low leakage current (IF ≈ 10-6 A), height potential barrier above 0.5 eV and grain boundary resistivity upward of 107 Ω.cm.