77 resultados para Coordination and harmonization


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Pós-graduação em Educação Matemática - IGCE

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Pós-graduação em Educação - FFC

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The use of computers in childhood education makes it possible for them to acquire knowledge in a fun way through games. This paper describes the experience of implementing the course “Computers for Children”, which is part of a University Extension Program at the School of Dentistry at UNESP - Araraquara. This course is offered to children aged 5-7 years old and it aims, not only, to offer children, via computer, a direct contact with new teaching technologies, but also, to help them develop both their motor and logical thinking abilities through educational games. The children that participated in this course are from the Children’s Center “Casinha de Abelha” at the UNESP -Araraquara and also from the Municipal Recreation and Educational Centers also in Araraquara, SP, Brazil. The software resources used in this course to teach computer skills are the educational games “Coelho Sabido Maternal”, “A Estrela Cintilante” and “Festa dos Dentinhos”. The children’s learning and the level of difficulty in using the computer as a tool were evaluated. It was possible to conclude that the course has been contributing to the digital inclusion of children aged 5-7 years old, in addition to training their visual and audio perception, their motor coordination and memorization, hence developing skills that are essential to the children’s literacy process.

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Pós-graduação em Geografia - FCT

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Pós-graduação em Biotecnologia - IQ

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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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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronegócio e Desenvolvimento - Tupã

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Palladium(II) coordination compounds of general formula trans-[PdX(2)(isn)(2)], X = Cl(-) (1), N(3) (-) (2), SCN(-) (3), NCO(-) (4), isn = isonicotinamide; were synthesized and characterized in solid state by elemental analysis, infrared spectroscopy, and simultaneous TG-DTA. TG experiments reveal that the compounds 1-4 undergo thermal decomposition in three or four stages, yielding Pd(0) as final residue, according to calculus and identification by X-ray powder diffraction.

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This work describes the synthesis, IR and (13)C CPMAS NMR spectroscopic as well the thermal characterization of the new dicarboxylate complexes [Pd(2)(ox)(2)(4,4'-bipy)]n (1), [Pd(2)(ox)(2)(bpe)](n) (2) and [Pd(2)(ox)(2)(pz)](n) (3) {ox = oxalate, bipy = 4,4'-bipyridine, bpe = 1,2-bis(4-pyridyl)ethane, pz = pyrazine}. TG experiments reveal that compounds 1-3 undergo thermal decomposition in three steps. Metal palladium was the final product of the thermal decompositions, which was identified by X-ray powder diffraction.

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The synthesis and thermal behavior of the new [Pd(fum)(bipy)] (n) center dot 2nH(2)O (1), [Pd(fum)(bpe)] (n) center dot nH(2)O (2) and [Pd(fum)(pz)] (n) center dot 3nH(2)O (3) {bipy = 4,4'-bipyridine, bpe = 1,2-bis(4-pyridyl)ethene and pz = pyrazine} fumarate complexes are described in this work as well their characterization by IR and (13)C CPMAS NMR spectroscopies. TG curves showed that the compounds released organic ligands and lattice water molecules in the temperature range of 46-491 A degrees C. In all the cases, metallic palladium was identified as the final residue.

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Synthesis, spectroscopic characterization and thermal behavior of pyrazolate-bridged palladium complexes [Pd(mu-Pz)(2)](n) (1), [Pd(mu-mPz)(2)](n) (2), [Pd(mu-dmPz)(2)](n) (3), [Pd(mu-IPz)(2)](n) (4) {pyrazolate (Pz(-)), 4-methylpyrazolate (mPz(-)), 3,5-dimethylpyrazolate (dmPz(-)), 4-iodopyrazolate (IPz(-))} have been described in this work. The exobidentate coordination mode of pyrazolato ligands in 1-4 was inferred on basis of IR spectroscopic evidences. TG investigations indicated that the introduction of substituents at the 4 position in the pyrazolyl moiety into coordination polymers do not affect significantly their thermal stability, whereas at the 3 and 5 position reduced the stability of the main chain. Metal palladium was the final product of the thermal decompositions, which was identified by X-ray powder diffraction.