Evaluación de la ejecución motora en niños brasileños en edad escolar

Se ha evaluado mediante la batería de Tests Motores de Lincoln-Oseretsky la ejecución motora en un grupo de 1.232 estudiantes de edades comprendidas entre 5 y 16 años provenientes del sistema de enseñanza del municipio de Aracajú (Brasil). Los resultados obtenidos ponen de manifiesto una progresión en el desarrollo de las capacidades motoras, aunque con diferencias de género debidas tanto a factores biológicos como de carácter ambiental. Por otra parte, la edad motora resulta significativamente inferior a la edad cronológica en todas las franjas de edad estudiadas, siendo también inferior a la edad motora de una muestra equivalente de escolares europeos. Este hecho podría atribuirse, al menos parcialmente, a la ausencia de experiencias motoras suficientemente enriquecedoras tanto en el ambiente familiar como en el entorno escolar

Análise multiescalar de atributos sedimentares em depósitos fluviais paleogênicos na Bacia de Volta Redonda, RJ

This study aims to perform a multi-scale analysis of the sedimentary attributes presented by Paleogene fluvial deposits of the Volta Redonda Basin (Continental Rift of Southeastern Brazil), including the characterization of sedimentary facies, depositional architecture and petrographical features. The results from this study may be applied to the modelling of fluid behaviour inside fluvial reservoir-rocks. Among the studied deposits are the main aquifers of the sedimentary basins which compose the Continental Rift of Southeastern Brazil. The methodologic framework comprised: interpretation of an outcrop by using a photomosaic to the recognition of depositional architecture, emphasizing the stratigraphic surface hierarchy; facies characterization with vertical profiles; and petrographic analysis of selected samples. Two distinct facies associations were recognized, corresponding to Resende and Pinheiral formations. The Resende Formation deposits present a simple complexity heterogeneity style, with a wide lateral continuity. They are composed by decimetric layers of massive sandstones interbedded to clayey sandstones, showing a tabular geometry and few dozen-meters width. The contacts between these deposits are gradual. The Pinheiral Formation deposits present a medium complexity heterogeneity style, exhibiting frequent truncation of architectural elements, characterized by decimetric and dozen-meters width sandy layers with conglomeratic levels interbedded to thin pelitic intervals. These deposits present a extended lenticular geometry and irregular contacts. Microscopically, sandstones from Resende Formation present low porosity, related to the occurrence of clayey matrix resulted from feldspars alteration. The sandstones from Pinheiral Formation show porosities similar to reservoir patterns.Este trabalho tem por objetivo a caracterização de atributos sedimentares em diversas escalas em depósitos fluviais paleogênicos da Bacia de Volta Redonda (Rift Continental do Sudeste do Brasil - RCSB), através de análises de fácies sedimentares, arquitetura deposicional, e petrográficas. Através deste estudo, busca-se produzir uma base de dados sedimentológicos aplicáveis a modelos de comportamento dos fluidos no interior de rochas-reservatório de origem fluvial. Entre os depósitos estudados, estão os principais aqüíferos presentes nas bacias sedimentares que compõem o RCSB. O método de trabalho consistiu primeiramente na interpretação de um afloramento, com o auxílio de fotomosaico, para o reconhecimento da arquitetura deposicional, enfatizando a hierarquização das superfícies estratigráficas. Em seguida, foi feita a caracterização de fácies sedimentares, com a elaboração de perfis colunares e amostragem para análise petrográfica em lâminas delgadas. Foram identificadas duas associações de fácies distintas, associadas às formações Resende e Pinheiral. Na Formação Resende, os depósitos apresentam estilo de heterogeneidade simples, com boa continuidade lateral, sendo constituídos de arenitos maciços intercalados com arenitos lamosos, em camadas com geometria tabular, espessuras decimétricas e larguras de poucas dezenas de metros, limitadas por contatos gradacionais. Os depósitos da Formação Pinheiral apresentam estilo de heterogeneidade de complexidade média, exibindo freqüente truncamento de elementos de arquitetura, sendo caracterizados por uma superposição de camadas arenosas com níveis conglomeráticos, limitadas por intervalos pelíticos pouco espessos. Ocorrem dispostos em camadas com geometria lenticular estendida, limitadas por superfícies irregulares e alcançando espessuras decimétricas e larguras de dezenas de metros. Microscopicamente, os arenitos analisados da Formação Resende apresentam porosidade muito reduzida, com presença de matriz argilosa proveniente da alteração de feldspatos. Os arenitos estudados da Formação Pinheiral apresentam porosidade próxima aos padrões de reservatório

Measuring the Progress and Success of Regional Health Policies: PRARI Toolkit of Indicators for the Union of South American Nations (UNASUR)

PRARI is a social development research project that looks at world-regional social governance, politics, and policy. PRARI brings together an international team of researchers studying the scope for enhancing the effectiveness of the contributions of Southern regional organisations to poverty reduction. It receives funding from the ESRC

Heterologous mesenchymal stem cells successfully treat femoral pseudarthrosis in rats

<p>Abstract</p> <p>Background</p> <p>This study evaluated the effectiveness of treating pseudarthrosis in rats by using bone marrow cell suspensions or cultures of bone marrow mesenchymal stromal cells</p> <p>Methods</p> <p>Thirty-eight specific pathogen-free (SPF) animals were randomly assigned to four groups: Group 1, Control, without surgical intervention; Group 2 (Placebo), experimental model of femoral pseudarthrosis treated only with saline solution; Group 3, experimental model of femoral pseudarthrosis treated with heterologous bone marrow cells suspension; Group 4, experimental model of femoral pseudarthrosis treated with cultures of heterologous mesenchymal stromal cells from bone marrow. When pseudarthrosis was confirmed by simple radiological studies, digital radiography and histopathology after a 120-day postoperative period, Groups 2, 3 and 4 were treated as above. At 30, 60 and 90 days after the treatment, all animals were evaluated by simple radiological studies, and at the end of the experiment, the animals were assessed by computed axial tomography and anatomopathological and histomorphometric examinations.</p> <p>Results</p> <p>Injected cells were detected in the areas affected by pseudarthrosis using scintigraphy within the first 24 hours after their administration. After 60 days, the animals of Group 3 showed callus formation while the animals of Group 4 presented periosteal reaction and had some consolidated areas. In contrast, Group 2 showed a predominance of fibro-osteoid tissue. After 90 days, bone consolidation and remodeling was observed in all animals from Group 3 whereas animals from Group 4 exhibited partial consolidation and those ones from Group 2 persisted with pseudarthrosis.</p> <p>Conclusion</p> <p>The treatment with heterologous bone marrow cells suspension proved to be effective in the treatment of pseudarthrosis whereas cultures of heterologous bone marrow mesenchymal stromal cells did not show the same potential to aid bone healing.</p