909 resultados para Tris(2,3-butanediamine)cobalt(iii)
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Review of May 2006 issue of journal Theory, Culture, and Society.
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Este relatório está inserido no âmbito da disciplina Prática de Ensino Supervisionada (PES), que permitirá a obtenção do grau de Mestre em Ensino de Educação Física nos Ensinos Básico e Secundário. O relatório de estágio aborda o trabalho desenvolvido realizado durante o ano lectivo 2009/201O, como professor estagiário, na Escola EB 2,3 Conde de Vilalva, na Escola Secundária Gabriel Pereira e na Escola Básica 1-Jardim de Infância do Bacelo. No final do estágio foi possível afirmar que o que aprendemos ao longo deste ano lectivo nos acompanhará para o resto da vida profissional e social, uma vez que este estágio curricular veio complementar a formação adquirida durante a Licenciatura, auxiliando na incrementação das competências técnico científicas, sociais e pessoais, indispensáveis a esta actividade profissional. ABSTRACT: This report is inserted in the supervised teaching subject, as known as Prática de Ensino Supervisionada (PES), which purpose is to obtain Master's degree in Physical Education in primary and secondary education. The stage report deals with all the work developed during 2009/201O school year, as a student teacher, in Escola EB 2,3 Conde de Vilalva, Escola Secundária Gabriel Pereira and in Escola Básica 1-Jardim de Infância do Bacelo. At the end of the stage, it was possible to state that what we have learned past this year will be useful and will be with us for the rest of our professional and social life due the formation acquired during graduation, improving technical, scientific, social and personal skills that are vital and indispensable to this professional activity.
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A Prática de Ensino Supervisionada desenvolveu-se no Agrupamento de Escolas nº 4 de Évora- EB 2,3 Conde Vilalva e na Escola Secundária André de Gouveia, com as turmas do 8º ano e 12° ano respectivamente. Para elucidar o trabalho realizado ao longo do ano desenvolvi o presente relatório onde abordei a preparação cientifica, pedagógica e didáctica que permitiu um conhecimento dos alunos e do currículo; a Planificação e condução das aulas e respectiva avaliação que faz referencia ao planeamento por etapas e às vantagens do mesmo e ainda à forma como foram leccionadas as aulas; uma análise da prática de ensino; a participação na escola e as actividades desenvolvidas nas mesmas; e o desenvolvimento profissional com referências ás competências que o professor deve assumir dentro da comunidade escolar. Com os parâmetros acima referidos demonstra-se a grande importância que o estágio teve na aquisição das competências essenciais inerentes à docência. ABSTRACT: Supervised Teaching Practice was developed in School Cluster nº 4 of Évora Elementary School Conde Vilalva and in Secondary School André de Gouveia, with classes of 8th and 12th grade, respectively. To elucidate the work I done over this school year, I developed this report which discussed the scientific, educational and teaching preparation, allowing an understanding of students and the curriculum; the planning and conduct of lessons and their assessment that refers to the planning stages, and to advantage of it and, on the other hand, the way that were taught lessons; an analysis of teaching practice; participation in school and activities carried therein; and professional development with reference to the competences that the teacher should take within the school community. With the above parameters is shown the importance of this stage in the acquisition of essential skills related to teaching.
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Este trabalho tem por base o relato de um ano lectivo 2009/201O de Prática de Ensino Supervisionada (PES) para a especialidade do grau de Mestre em Ensino de Educação Física nos Ensinos Básico e Secundário, leccionado na Universidade de Évora e contribui para a avaliação do mesmo. O estágio foi realizado no agrupamento de Escolas n° 4 de Évora - EB 2,3 Conde de Vilalva; EB1 Jardim de Infância e Escola Secundária Gabriel Pereira, abrangendo os três ciclos de aprendizagem dando assim cumprimento à exigência curricular. Relata de forma sucinta a preparação científica, pedagógica e didáctica desde o conhecimento do currículo, do conteúdo e dos alunos. Desenvolve de forma fundamentada a planificação, condução de aulas e avaliação das aprendizagens. Faz uma análise das actividades desenvolvidas como professor de uma disciplina e como participante activo na escola e na comunidade escolar. Tenta fundamentar as estratégias, metodologias e decisões tomadas. Por último, realiza uma análise da prática de ensino. O que foi constatado nesta pequena experiência foi uma prática mais consciente e um respeito maior, por nós mesmo, enquanto profissional da educação, e pelos alunos, enquanto sujeitos activos no processo de ensino/aprendizagem. ABSTRACT: This work is based on the report of an academic year 2009/2010 Supervised Teaching Practice (PES) for the specialty Master's degree in Teaching Physical Education in Primary and Secondary Schools, taught at the University of Évora and contribute to the evaluation the same. The group stage was held at school n8 4 EB 2,3 Conde Vilalva e Kindergarten and Secondary school Gabriel Pereira, covering the three cycles of learning thus fulfilling the curricular requirement. Reports briefly the scientific training and didactic knowledge from the curriculum the content and pupils. Develop and informed opinion to planning, conducting classes and learning assessment. Makes and analyses of the activities as a teacher of a discipline and as an active participant in school and school community. Try the strategies, methodologies and decisions. Finally makes an analysis of teaching practice. What was found on this little experiment was a more conscious practice and a greater respect for ourselves as professional education, and students as active participants in the teaching /learning.
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A presente dissertação é uma sinopse do trabalho desenvolvido no âmbito do estágio de Prática de Ensino Supervisionada em Educação Física. O estágio decorreu em duas escolas dos Ensinos Básico e Secundário. A dissertação encontra-se dividida por partes: preparação e planificação de aulas, conhecimento das turmas, condução das aulas, avaliação e processo reflexivo das várias etapas. Foram desenvolvidas actividades para as comunidades escolares de ambas as escolas e foi feita uma reflexão final do estágio que teve como objectivo analisar todos os procedimentos que foram desenvolvidos ao longo do ano lectivo. A passagem pelos quatro ciclos de ensino foi bastante produtiva para o enriquecimento do processo enquanto professor. As aulas seguiram o planeamento anual que estava delineado e foi esta ferramenta que possibilitou a existência de uma grande autonomia dos alunos, um maior controlo na prática pedagógica e a presença sistemática do jogo, trazendo uma motivação e empenhamento suplementar nas aulas e nas actividades desenvolvidas. ABSTRACT: The following dissertation is a synopsis of what was done at the scope of Supervised Practices for Physical Education beginning teachers. The traineeship took place in two schools from Primary to Secondary levels. The dissertation is divided into several parts: preparation and lessons planning, students' profile, lessons, evaluation and reflexive process on the different stages. lt was developed activities for the communities of the booth schools and was made a final reflection of the traineeship stage that have as a propose analyze all the procedures that was developed in all the academic year. The passage for the four cycles of school was very productive for the enrichment as a professor. The classes were follow as was expected and was that possibilities the existence of a great autonomy of the students, a bigger contrail in the pedagogy practice and systematic presence of the game that bring a motivation and supplementary interest in the classes and activities developed.
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O presente relatório surge como um complemento à minha Prática de Ensino Supervisionada, realizada no ano lectivo de 2009/201O, visando essencialmente a reflexão e documentação do trabalho por mim desenvolvido ao longo deste ano. A minha Prática de Ensino Supervisionada debruçou-se sobre a disciplina de Educação Física, e decorreu na Escola EB 2,3 Conde de Vilalva, onde leccionei a disciplina a uma turma de 8° ano, e na Escola Secundária André de Gouveia, tendo leccionado a disciplina a um 12° ano. Durante este mesmo ano lectivo, leccionei ainda entre 8 intervenções a uma turma do 1° Ciclo de Ensino Básico, 1° ano; e 9 intervenções a uma turma do 2° Ciclo de Ensino Básico, o 5° ano. ABSTRACT: This document comes as a complement to my Supervised Teaching Practice, held in the 2009/201O academic year, aiming primarily to reflection and documentation of the work developed throughout this year. My Supervised Teaching Practice was focused on the discipline of Physical Education, and held at EB 2,3 Conde de Vilalva where I taught a class in 8th grade, and in high school André de Gouveia, where I taught the discipline to a class in 12th grade. During that same academic year, I taught between 8 and 1O interventions with a class of 1st cycle of education, 1st grade, and with a class of 2nd cycle of education, a 5th grade.
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Low-pressure MOCVD, with tris(2,4 pentanedionato)aluminum(III) as the precursor, was used in the present investigation to coat alumina on to cemented carbide cutting tools. To evaluate the MOCVD process, the efficiency in cutting operations of MOCVD-coated tools was compared with that of tools coated using the industry-standard CVD process.Three multilayer cemented carbide cutting tool inserts, viz., TiN/TiC/WC, CVD-coated Al2O3 on TiN/TiC/WC, and MOCVD-coated Al2O3 on TiN/TiC/WC, were compared in the dry turning of mild steel. Turning tests were conducted for cutting speeds ranging from 14 to 47 m/min, for a depth of cut from 0.25 to 1 mm, at the constant feed rate of 0.2 mm/min. The axial, tangential, and radial forces were measured using a lathe tool dynamometer for different cutting parameters, and the machined work pieces were tested for surface roughness. The results indicate that, in most of the cases examined, the MOCVD-coated inserts produced a smoother surface finish, while requiring lower cutting forces, indicating that MOCVD produces the best-performing insert, followed by the CVD-coated one. The superior performance of MOCVD-alumina is attributed to the co-deposition of carbon with the oxide, due to the very nature of the precursor used, leading to enhanced mechanical properties for cutting applications in harsh environment.
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The Langmuir-Blodgett (LB) composite films, ferric oxide nanoparticle composite with tris-(2,3-di-t-amylphenoxy)-(8-quinolinolinolyl) copper phthalocyanine (CuPcA(2)), were obtained by capped type and alternated type and characterized by X-ray photoelectron spectroscopy (XPS) and visible spectra. The gas sensitivity of the composite films and the pure ferric oxide and pure CuPcA(2) LB films to ammonia and ethanol were measured at room temperature. The composite films could be used as the C2H5OH sensors in the range of 2-8 or 100-200 ppm. The XPS data suggested that the adduct complex NH3-CuPcA(2) was formed after the capped film was exposed to the detected gas of ammonia. (C) 2000 Elsevier Science B.V. All rights reserved.
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BACKGROUND: The synthesis of published research in systematic reviews is essential when providing evidence to inform clinical and health policy decision-making. However, the validity of systematic reviews is threatened if journal publications represent a biased selection of all studies that have been conducted (dissemination bias). To investigate the extent of dissemination bias we conducted a systematic review that determined the proportion of studies published as peer-reviewed journal articles and investigated factors associated with full publication in cohorts of studies (i) approved by research ethics committees (RECs) or (ii) included in trial registries. METHODS AND FINDINGS: Four bibliographic databases were searched for methodological research projects (MRPs) without limitations for publication year, language or study location. The searches were supplemented by handsearching the references of included MRPs. We estimated the proportion of studies published using prediction intervals (PI) and a random effects meta-analysis. Pooled odds ratios (OR) were used to express associations between study characteristics and journal publication. Seventeen MRPs (23 publications) evaluated cohorts of studies approved by RECs; the proportion of published studies had a PI between 22% and 72% and the weighted pooled proportion when combining estimates would be 46.2% (95% CI 40.2%-52.4%, I2 = 94.4%). Twenty-two MRPs (22 publications) evaluated cohorts of studies included in trial registries; the PI of the proportion published ranged from 13% to 90% and the weighted pooled proportion would be 54.2% (95% CI 42.0%-65.9%, I2 = 98.9%). REC-approved studies with statistically significant results (compared with those without statistically significant results) were more likely to be published (pooled OR 2.8; 95% CI 2.2-3.5). Phase-III trials were also more likely to be published than phase II trials (pooled OR 2.0; 95% CI 1.6-2.5). The probability of publication within two years after study completion ranged from 7% to 30%. CONCLUSIONS: A substantial part of the studies approved by RECs or included in trial registries remains unpublished. Due to the large heterogeneity a prediction of the publication probability for a future study is very uncertain. Non-publication of research is not a random process, e.g., it is associated with the direction of study findings. Our findings suggest that the dissemination of research findings is biased.
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The goal of the present work was to identify and characterize gene sequences that are preferentially expressed in CML in an effort to better understand the molecular basis of the disease. As high abundance mRNAs generally encode proteins that are phenotypically characteristic of cells, positive-negative screening of a CML cDNA library was used to identify cDNA clones containing sequences preferentially transcribed in CML. One cDNA sequence that fulfilled this criterion, C-A3, has been characterized in some detail. It represents a small mRNA ((TURN)496 nucleotides) that is highly abundant ((TURN)2% of the poly(A('+))RNA) in cells from the chronic phase of CML. In situ hybridization to whole cells indicates the principal leukocytes that express C-A3 sequences are eosinophils, basophils and immature myelocytes. Surprisingly, CML patients with high numbers of myeloblasts do not have an abundance of C-A3 transcripts, although transcript levels remain elevated in patients with lymphoblasts. In AML, high transcript levels are only found sporadically and occasionally different sized transcripts can be detected. Sequences from the 3' end of the C-A3 message are present in 2-5 copies per haploid genome. The 3' end of C-A3 localizes to bands 8q21.1 and 8q23 by in situ chromosomal hybridization. This is a region that is often involved in hematopoietic malignancies. Restriction digests of human genomic DNA show a correlation between the presence of a 2.3 kb Hind III fragment and certain types of leukemia. All of the leukemic DNAs tested had this fragment. In comparison, only one of five normal DNAs had a band this size. Analysis of the nucleotide sequence indicates that C-A3 probably encodes a small, hydrophobic peptide which may be part of a larger protein. ^
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Four new 2-oxo-1,2-dihydrobenzoh]quinoline-3-carbaldehyde N-substituted thiosemicarbazone ligands (H-2-LR, where R = H, Me, Et or Ph) and their corresponding new cobalt(III) complexes have been synthesized and characterized. The structures of the complexes 2 and 3 were determined by single crystal X-ray diffraction analysis. The interactions of the new complexes with DNA were investigated by absorption, emission and viscosity studies which indicated that the complexes bind to DNA via intercalation. Antioxidant studies of the new complexes showed that the significant antioxidant activity against DPPH radical. In addition, the in vitro cytotoxicity of complexes 1-4 against A549 cell line was assayed which showed higher cytotoxic activity with lower IC50 values indicating their efficiency in killing the cancer cells even at very low concentrations. (C) 2012 Elsevier Masson SAS. All rights reserved.
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Three new mononuclear complexes of nitrogen-sulfur donor sets, formulated as (Fe-II(L)Cl-2] (1), [Co-II(L)Cl-2] (2) and [Ni-II(L)Cl-2] (3) where L = 1,3-bis(2-pyridylmethylthio)propane, were synthesized and isolated in their pure form. All the complexes were characterized by physicochemical and spectroscopic methods. The solid state structures of complexes I and 3 have been established by single crystal X-ray crystallography. The structural analysis evidences isomorphous crystals with the metal ion in a distorted octahedral geometry that comprises NSSN ligand donors with trans located pyridine rings and chlorides in cis positions. In dimethylformamide solution, the complexes were found to exhibit Fe-II/Fe-III, co(II)/co(III) and Ni-II/Ni-III quasi-reversible redox couples in cyclic voltammograms with E-1/2 values (versus Ag/AgCl at 298 K) of +0.295, +0.795 and +0.745 V for 1, 2 and 3, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
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Hydroxo-bridged homo- and hetero-trinuclear cobalt(III) complexes of the type [MII(H2O)2{(OH)2CoIII(N4)}2]X2·nH2O [MII= a divalent metal ion such as CoII, NiII or ZnII; N4=(en)2(en = ethane-1,2-diamine) or (NH3)4; X = SO4 or (ClO4)2; n= 3 or 5] have been prepared and spectroscopically characterized. The structure of [Cu{(OH)2Co(en)2}2][SO4]2·2H2O 1 has been determined. The geometry around copper atom is a pseudo-square-based pyramid, with the basal sites occupied by four bridging hydroxide oxygens and the apical site is occupied by a weakly co-ordinated sulfate anion [Cu–O 2.516(4)Å]. The hydroxo groups bridge pairs of cobalt(III) ions which are in near-octahedral environments. The ethylenediamine chelate rings have the twist conformation. In the crystal structure of [Cu{(OH)2Co(en)2}2][ClO4]4·2H2O 2 the perchlorate ion is not co-ordinated and the en ligands have envelope conformations. The sulfate ion in [Cu{(OH)2Co(NH3)4}2][SO4]2·4H2O 3 is not co-ordinated to the central copper ion. Electronic, infrared and variable-temperature EPR spectral data are discussed.
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A novel mesoporous material covalently bonded with 8-hydroxyquinoline (HQ) was synthesized (designated as Q-SBA-15). The 5-formyl-8-hydroxyquinoline grafted to.(3-aminopropyl)triethoxysilane, that is, alkoxysilane modified 8-hydroxyquinoline (Q-Si), was used as one of the precursors for the preparation of the Q-SBA-15 material. On the basis of the other function of the Q-Si of coordinating to lanthanide (Ln) ions, for the first time, the LnQ(3) complexes (Ln = Er, Nd, Yb) have been covalently bonded to the SBA-15 materials.
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The electrochemistry and electrogenerated chemiluminescence (ECL) of ruthenium(II) tris(bipyridine) (Ru(bpy)(3)(2+)) ion-exchanged in carbon nanotube (CNT)/Nafion composite films were investigated with tripropylamine (TPA) as a coreactant at a glassy carbon (GC) electrode. The major goal of this work was to investigate and develop new materials and immobilization approaches for the fabrication of ECL-based sensors with improved sensitivity, reactivity, and long-term stability. Ru(bpy)(3)(2+) could be strongly incorporated into Nafion film, but the rate of charge transfer was relative slow and its stability was also problematic. The interfusion of CNT in Nafion resulted in a high peak current of Ru(bpy)(3)(2+) and high ECL intensity. The results indicated that the composite film had more open structures and a larger surface area allowing faster diffusion of Ru(bpy)(3)(2+) and that the CNT could adsorb Ru(bpy)(3)(2+) and also acted as conducting pathways to connect Ru(bpy)(3)(2+) sites to the electrode. In the present work, the sensitivity of the ECL system at the CNT/Nafion film-modified electrodes was more than 2 orders of magnitude higher than that observed at a silica/Nafion composite film-modified electrode and 3 orders of magnitude higher than that at pure Nafion films.