46 resultados para 1072


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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This work focuses on the study of BaMgAl10O17:Eu2+ (BAM:Eu) nanophosphors prepared by a microwave-assisted combustion procedure and more especially on the polymer/BAM:Eu nanocomposite film suitable for optical devices such as solid-state-lighting. Powder presented a specific nanomorphology, highly friable and thus easily ground into fine particles. They were then homogeneously dispersed into a polymer solution (poly(N-vinylpyrrolidone) or PVP) to elaborate a polymer phosphor nanocomposite. The structural, morphological and optical features of the nanocomposite film have been studied and compared to those of a pristine PVP film and BAM:Eu powder. All the characterizations (XRD, SEM, SAXS, etc.) proved that the blue phosphor nanoparticles are well incorporated into the polymer nanocomposite film which exhibited the characteristic blue emission of Eu2+ under UV light excitation. Furthermore, the photostability of the polymer/phosphor nanocomposite film has been studied after exposure to accelerated artificial photoageing at wavelengths above 300 nm.

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

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Data presented here is the result of an extension project developed by UNESP which aims to support children who complain about learning disabilities. These students with reading and writing problems were part on intervention sessions, individually and/or in small groups, in which different games and non-usual activities were implemented. These intervention sessions seek an improvement in the non-learning situation and, above all, a change in the relationship that the children have established with these school subjects. So far, the main results indicate a development in the mentioned areas and a significant improvement in the entire student learning condition, which were verified during the intervention sessions and by the teachers’ and parents’ reports, as well. We also present here reflections on the process of assessment and intervention and about the way these subjects are dealt at school, and the meaning of not learning how to read and how to write for a child.

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

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The purpose was to evaluate the effectiveness of beta-radiation with strontium-90 as single modality treatment of canine third eyelid squamous cell carcinoma (SCC). Nine dogs diagnosed with third eyelid SCC were treated with strontium-90. Radiation therapy was administered in four fractions of 100cGy per site every four days and at a depth of 0.2cm (Strontium-90 build' up) in each fraction. Radiation with beta therapy was well tolerated in all animals with no occurrence of radiation induced cataracts. In all cases, there were increased signs of conjunctival inflammation around the mass, which subsided with topical anti-inflammatory. Two dogs required surgical treatment for local tumor recurrence at 150 days and 352 days. In the remaining seven cases, disease free interval ranged from 1239 days to 2555 days. Beta therapy using 90Sr may be a valid alternative for the treatment of third eyelid SCC in dogs

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)