Iron(III) niobate, FeNbO 4 , was synthesized for the first time by microwave-assisted combustion reaction between Fe(NO 3) 3 .9H 2 O and NH 4 [NbO(C 2 O 4) 2 (H 2 O) 2 ](H 2 O) in the presence of NH 4 NO 3 and Urea {O=C(NH 2) 2 }. Experiments of X-ray powder diffraction revealed a small crystallite size for this material, 16 nm, and the results of MEV showed that it forms agglomerates with diameters between 80 and 180 nm with spherical shapes. HRTEM images revealed that the material is formed by clusters of particles with a diameter near 20 nm. A surface area of 40 m 2 g-1 was determined by experiments of specific surface area (SSA). The FeNbO 4 induced the decomposition of H 2 O 2 , forming radicals that, in turn, discoloured Indigo dye Carmine (IC) a solution. The results showed that this niobate was able to degrade 55% of the initial solution in the presence of H 2 O 2 after 360 minutes of reaction time.
O objetivo deste estudo é avaliar a percepção dos profissionais da educação, antes e após a aplicação de treinamento teórico-prático baseado em metodologias ativas, sobre segurança e prevenção contra incêndio e evacuação em situação de desastres. O método de investigação adotado é a pesquisa-ação, por envolver diagnóstico, planejamento, realização de ação e avaliação para identificar a percepção dos profissionais da educação sobre proteção contra incêndio. A população é constituída de 29 profissionais da educação e 75 estudantes, com idades entre 4 e 5 anos, de uma escola particular na cidade Itabira-MG. Utiliza-se a técnica de questionário estruturado para os professores e funcionários, aplicado antes do projeto para mensurar o conhecimento prévio dos entrevistados e depois do projeto, para avaliar a eficácia do treinamento aplicado, a percepção dos professores quanto ao aprendizado deles e das crianças e a necessidade de o tema ser um assunto que a comunidade escolar deveria tratar constantemente como um assunto importante na programação do calendário escolar. Os resultados apontam que é necessário adotar treinamentos de segurança nas escolas e manter esses treinamentos constante. Conclui-se que se os professores e funcionários da escola passarem por treinamentos regularmente serão capazes de atuar de forma consciente, junto aos alunos, em caso de emergência. Que é importante usar métodos científicos para que ocorra um aprendizado amplo e eficaz e se faz necessário adotar o tema no conteúdo programático das escolas.
The objective of this study is to evaluate the perception of education professionals, before and after the application of theoretical and practical training based on active methodologies, on safety and prevention against fire and evacuation in disaster situations. The research method adopted is an action research, as it involves diagnosis, planning, action and evaluation to identify the perception of fire protection education professionals. The population consists of 29 education professionals and 75 students, aged between 4 and 5 years, from a private school in the city of Itabira-MG. The structured questionnaire technique is used for teachers and employees, applied before the project to measure the interviewees 'prior knowledge and after the project, to evaluate the effectiveness of the applied training, the teachers' perception of their and children's learning and the need for the topic to be an issue that the school community should constantly address as an important issue in the school calendar schedule. The results indicate that it is necessary to adopt safety training in schools and to keep this training constant. It is concluded that if teachers and school staff undergo regular training they will be able to act consciously, with students, in an emergency. That it is important to use scientific methods so that a broad and effective learning occurs and it is necessary to adopt the theme in the syllabus of schools.
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