1000 resultados para Sala de recuperação


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Pós-graduação em Estudos Linguísticos - IBILCE

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Educação - FFC

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Agronomia (Proteção de Plantas) - FCA

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

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This text assumes for present and understand how the books are arranged in different physical spaces, inside the classroom, and how are they perceived by teachers and students, by regulating actions and performances of the subjects. To this end, a field research, from the collection of different images of the school environments in which the books are exposed. The analysis of the images if the theoretical concepts behind about space to articulate the idea of Rodriguez, school culture, the perception of Vidal and school material culture of Viñao Frago and Escolano Benito. Upon reflection, in the design of materiality of the book and, according to Chartier. The observations of the images indicate actions of spreading a school environment of interaction with the book, characterized now by the mobility of physical space, now determined by the need for visibility and demarcation of a normal space, in order to prioritize access to the books and the taming of the reader.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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A simple procedure for recovering potassium dichromate (K2Cr2O7 ) from treatment of residual sulphochromic solution was proposed in the present work by means of cooling crystallization. The decrease of temperature favored the crystallization of K2Cr2O7 due to the decrease of solubility. 5.0 L of sulphochromic wastes containing 48.08 g L-1 of Cr(VI) were treated and the process of crystallization was performed in three steps until crystals were not formed anymore. On each step the content of Crtotal was determined by flame atomic absorption spectrometry and Cr(VI) by colorimetric method with 1,5- diphenylcarbazide, resulting in the removal of 91% and 92% of Crtotal and Cr(VI), respectively. After the last step, the remaining Cr(VI) in the solution was reduced to Cr(III) from the addition of NaHSO3 , recovering via precipitation in pH 8 approximately 36.13 g of Cr(OH)3 . The final supernatant was discarded since chromium content was below the maximum limit established by the Brazilian legislation for effluents discharge, which corresponds to 0.10 and 1.0 mg L-1 of Cr(VI) and Cr(III), respectively. 628.4 g of K2Cr2O7 were recovered and the salt was characterized by X-ray diffraction and differential thermal analysis. Its applicability was compared to the standard K2Cr2O7 when determining the soil organic matter, in which there was no significant difference, thus inferring that the recovered compound may be incorporated on routine analyses. This recovering process allowed the reuse of K2Cr2O7 , thus reducing costs with the acquisition of new reagents and environmental impacts caused by the inadequate discard of sulphochromic solutions.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia Civil - FEIS