988 resultados para YouTube (Recurso eletrônico)


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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.

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

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Pós-graduação em Comunicação - FAAC

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Pós-graduação em Educação - FFC

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Combining the characteristics of good adhesion and sealing of the AH Plus sealer the biological properties of the MTA, zinc oxide and calcium hydroxide, the purpose of this study was to evaluate the cytotoxicity of these associations. The specimens of the sealers and their associations were mixed and exposure to culture medium (82.4 mm2surface/mL) after the manipulation and incubated in a humidified incubator (37°C and 100% humidity) for 24 h. Chinese hamster lung fibroblasts (V79) were exposed to different dilutions of this extracts for 24 h and cell viability was measured by MTT test. The differences between the cell survival rates were statistically analyzed for Kruskal-Wallis and Dunn (p≤0.05). All sealers showed a significant difference with the group control, except the MTA. Cytotoxicity with the control group increased in the following order: AH Plus < AH Plus + Ca(OH) 2 < AH Plus + OxZn< AH Plus + MTA < MTA (p≤ 0,05). It was concluded that the addition of biological materials in order to improve the consistency of AH Plus for use in retro cavities its toxicity has not decreased significantly

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In this work were studied associations of ZnO with the natural products caffeic and feluric acids. Two preparation methods were used, that is, the sol-gel and a reflux procedure. In the sol-gel method, ZnO is produced by the basics hydrolysis of precursors in the presence of the organic filters (caffeic and feluric acids), which results in 30 nm (or less) ZnO particles with the organic filters (in dissociated form) bonded to the surface of ZnO. In the reflux method, a dispersion of ZnO in a water/ethanol mixture was kept under reflux (50oC/4h) in the presence of the organic acids. The ZnO particles used in the reflux method have a higher diameter than sol-gel ZnO particles, but the prepared associated product ZnO/Organic acids were similar. Despite of the difference in relation to crystallinity between the products, the preparation methods resulted in analogous associations with respect to the interaction of the organic filters with the ZnO surface. The caffeic/ZnO associations presented low photostability, which lead to the degradation of the organic filter. The other associations (feluric acid/ZnO) presented satisfactory results. The FT-IR spectroscopy confirmed the formation of the association, and the nature of the bond formed compared with the Zn-O bond in Zn2+/Felutic acid complexes. The isolated organic and inorganic filters, along with the associations were analyzed by diffuse reflectance spectroscopy and Uv-vis spectroscopy. The absorption edges and the critical wavelengths were analyzed and the effects of Zn-O bonds in feluric acid/ZnO associations described as a function of the relative position of the π/π* system of the organic filter. Finally the performance of the hybrid filters were investigated in terms of the absorption of UVA and UVB radiations, with the UVA/UVB ratio, an efficiency parameter largely used in the description of solar filters, sunscreen and suncare products

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Contemporary society is going through a cultural revolution evidenced by the area of information technology, and this has led to a transformation in social relations and in the classroom. trying to adjust to these changes and also to curricular high school, the teacher can use as teaching materials, some visual aids: the videos. for this he can use the youtube site to select this educational material. however, given the vast amount of videos available on the site requires a careful selection of them. this work of completion then you want to make a qualitative analysis about the videos available free on the youtube site

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The purpose of this study was to evaluate the antimicrobial activity of chlorhexidine gel 2% as auxiliary chemical substance on the biomechanical preparation (BMP) and medication intracanal (ICM) on C. albicans, E. faecalis, E. coli and their endotoxin in root canals. We used 48 single-rooted human teeth divided into four groups according to dressing ICM: 1) Ca(OH)2 + pyrogen-free saline solution; 2) 2% chlorhexidine gel (CLX); 3) Ca(OH)2 + CLX, and; 4) pyrogen-free saline solution (control group). Were collected the contents of root canals to confirm the presence of microorganisms (confirmation), immediately after instrumentation (1st collection), after 7 days of the BMP (2nd collection), after 14 days of the action of ICM (3rd Collection) and 7 days after removal of the ICM (4 th collection). Were performed: the evaluation of antimicrobial activity and the content analysis of endotoxins for all sampling tests. The results were statistically analyzed using Kruskall-Wallis and Dunn tests with a significance of 5%. It was found that the CLX as auxiliary chemical substance has significantly reduced microorganisms confirmation collection when compared. In relation to the neutralization of endotoxin, it was found that the 1st and 2nd collections presented a decrease of 92.03% and 98.10% in mean percentage respectively, when compared to the confirmation collection. In the 3rd and 4th samplings, the Ca (OH)2 + CLX group showed the best results. It was concluded that the BMP and the ICM were able to eliminate the tested microrganisms, however, they were not able to completely eliminate endotoxins root canal

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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O atletismo é uma modalidade esportiva pouco explorada em aulas de Educação Física Escolar. Há muitos motivos para isso, tais como: falta de espaço adequado na escola para que possa ser realizado, falta de material, desinteresse dos alunos e de professores. Em virtude disso, esta pesquisa tem como objetivo investigar as experiências pedagógicas de professores de Educação Física com o atletismo, registradas em vídeos disponibilizados na internet, mais especificamente no Youtube, verificando suas contribuições para o ensino e difusão desta modalidade esportiva na escola. Para tanto, foram coletados vídeos da rede social Youtube, a fim de elaborado um banco de dados sobre o assunto, de forma a auxiliar professores de Educação Física, incentivando-os a divulgarem seu trabalho na internet. Após a análise dos vídeos, foram criadas duas categorias: a primeira denominada Vídeo Amador e a segunda Vídeo semiamador. A partir dessas duas categorias, elaboramos 3 eixos que auxiliaram na obtenção dos resultados, que foram: Eixo 1 - Conteúdo e meios, Eixo 2 - Ambiente e fase escolar e Eixo 3 - Poder de difusão. Ao final das análises os resultados nos mostraram que o atletismo, está de certa forma sendo ensinado no âmbito escolar, mais especificamente nas aulas de Educação Física, mas como evidenciamos no Eixo 3 - Poder de difusão, os vídeos com estas experiências, não estão sendo publicados, mais que isso, não estão sendo visualizados por professores e alunos, a fim de aumentar a difusão do atletismo, tanto quanto, o ensino deste. Concluímos que a partir desta pesquisa possamos fornecer subsídios para que os professores de Educação Física possam construir, junto à escola e aos seus alunos, possibilidades de ensino-aprendizagem em torno desta modalidade esportiva, contribuindo para a sua difusão no âmbito escolar

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Seminário realizado em novembro de 2013, pela Comissão de Desenvolvimento Urbano da Câmara dos Deputados, com o objetivo de debater questões relacionadas ao implemento de políticas públicas de desenvolvimento urbano

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Evento internacional, cujo caderno de resumos está disponível em http://www.sbece.com.br/conteudo/view?ID_CONTEUDO=865, mas os Anais estão disponíveis somente em CD rom.