133 resultados para Coordination of intersections


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This work deals with the synthesis, spectroscopic characterization of mono and polynuclear Pd(II) compounds obtained from the reaction between [PdCl2(MeCN)2] precursor and imidazolidine-2-thione (L1) and benzimidazoline-2-thione (L2). The interaction between [PdCl2(MeCN)2] and imidazolidine-2-thione, in the 1:2 molar ratio, using MeOH as solvent, yielded compound [Pd2Cl4(L1)4]Cl2 (1) whereas the complex [Pd2Br4(L1)4]Br2 (2) was obtained from the reaction between 1 and Br- ions. Binuclear compounds of general formulae [Pd2(L2)4]X23/2 MeOH {X= Cl-(3), Br-(4)} were synthesized using benzimidazoline-2-thione as ligand, employing the same procedure used in the synthesis of 1 and 2, respectively. The new complexes 1-4 are crystalline, air stable and soluble in methanol and dmso. The compounds were characterized by elemental analysis, IR spectroscopy, ESI/MS mass spectrometry and thermogravimetry. Coordination of the ligands L1 and L2 via sulphur atom was evidenced by the shift of the CS band (~499 cm-1, 1 and 2; ~620 cm-1, 3 and 4) to lower frequencies in comparison with those found in the free ligands (510 cm-1, L1; 660 cm-1, L2), indicating the weakening of the CS bom after coordination. ESI/EM mass spectra (positive mode) of the complexes 1-4 allowed atribute the molecular formulae [Pd2X4(L1)4]X2 {X= Cl-(1), Br-(2)} and [Pd2(L2)4]X2 {X= Cl-(3), Br-(4)} by the appearance of the peaks at m/z 794,61 [(1) + MeOH]+, m/z 836,77 [(2) - 2H - L1]+, m/z 810 [(3) - 2Cl]+, m/z 810 [(4) - 2Br]+. The TG-DTA curves showed that the complexes 1 and 2 are thermally stable up to 212 and 169º C, respectively, and further decompose to metallic palladium at 527º C (1, obt. 28,46 %; calcd. 27,88%) and 895º C (2, obt. 22,85 %; calcd. 22,62%). Compounds 3 and 4 exhibited an initial mass loss of ~5% between 25 -146º C related to the release of metanol molecules. The complexes 3...Fujimura Leite.

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Pós-graduação em Docência para a Educação Básica - FC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This paper, elaborated from documents created and used in the last years by the commissions and coordinations of the Science and Mathematics Teaching CAPES/MEC (Coordination of Improvement of Higher Education Personnel/Ministry of Education) Area, brings some explanations regarding the professional master’s degree in Science and Mathematics Teaching. This kind of master’s program is an innovation in Brazil and may contribute significantly to the improvement of science and mathematics teaching in the country. It may also stimulate the development of similar proposals in other Latin-American countries.

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The production of starch and cassava starch (Manihot esculenta) if has shown to an important business for the region the northwest of the Paraná, generating income and job for a significant agricultural producers. The production of the region is processed for industries at private capital and cooperatives of producers. The study involving agricultural producers and one of the most important cooperatives of the region (C-Vale) objectified to evaluate the relationships between cooperative and producers, and the mechanisms of coordination of the productive chain. The results had disclosed that the relationships are not harmonious, generating opportunism situations, high costs of transaction and diffidence in the operations between producers and cooperative. Also if it perceived a difficulty of coordination of the productive chain, due to lack of integration between the partners, what it affects the competitiveness and the efficiency of the sector.

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In this article, we present results that express the occurrence of narratives researches in the form of theses and dissertations in postgraduate programs in Brazil, from 2000 to 2010 in the Teaching of Science and Mathematics area. We consulted the Student Registration, on the site of the Coordination of Improvement of Higher Education Personnel, through the keywords: narrative research, narrative inquiry and teacher training. Through reading the abstracts, we identified the area of knowledge, the IES and the supervisor. Of the 162 (one hundred, sixty two) academic productions identified, 31 (thirty-one) are in the area of Science and Mathematics teaching. The data obtained point to the existence of groups of studies and research training in the country engaged in narrative research in Mathematics and Science Teaching, in line with teacher training.

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The perspective STSE (Science-Technology-Society-Environment) was recently implemented in the training courses for science teachers in Brazil, and proposes greater coordination of scientific knowledge with subjective questions that constitute the science, enables discussion of the nature of science and its implications for social and environmental issues. The present work aims to contribute to training of science teachers that approximates the current demands of contemporary society. Having as theoretical reasons the implications of STSE Movement in science teaching, we bring some considerations on pedagogical practices of undergraduates in Biological Sciences held within its Supervised. Through content analysis of the speeches of undergraduates, we can identify contributions and limitations that treatment of socio-scientific issues (SSI) revealed in the process, putting to discuss some aspects that are tangent training teachers committed to a contextualized view of science and scientific training. It discusses, among them, the relationship theory and practice in supervised training of future teachers’ conceptions about the implications of the STSE perspective in science teaching and science teacher positioning ahead controversial themes.

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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This study aimed at understanding the role played by nurses in managing a team in the Family Health Strategy (ESF) in relation to competences and skills practiced and developed in their everyday work and the difficulties found to perform their duties based on these professionals’ perceptions. Data were collected by means of focus groups with seven nurses in 2006 and then submitted to content analysis, which disclosed five themes: The context of the coordination of multidisciplinary teams in the Family Health Strategy, factors involved in the daily work in the ESF, conflicts experienced in the interface between teamwork and central coordination in the ESF, difficulties of the population towards the new model of care coordinated by the nurse, the perceived competence to exercise leadership in coordinating multidisciplinary teams. Results showed work overload, overlapping of tasks and lack of training. These professionals have been evaluated according to the logic of their work organization by productivity and not by the quality of their actions. Hence, they feel devalued professionally. They pointed out technical and scientific knowledge as an important competence attached to relational practices. There is a need to create formal opportunities to discuss the major difficulties found by the nurses managing multiprofessional teams when experiencing such management.

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Pós-graduação em Planejamento e Análise de Políticas Públicas - FCHS

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)