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Desenvolvimento profissional de professoras alfabetizadoras em ambiente virtual de aprendizagem: contribuições de casos de ensino
(Universidade Federal de São Carlos, 2013-03-01) Domingues, Isa Mara Colombo Scarlati; Mizukami, Maria da Graça Nicoletti; https://lattes.cnpq.br/2642625278261119
The present study lies in discussions about teacher education and investigated the learning and teachers professional development by making use of teaching cases and case methods, while training tool and investigative processes driving reflective about the knowledge of teaching. The teaching cases are narratives of episodes usually extracted from real data and daily school experiences that give visibility to the teachers experiences, that when analyze them and build them, articulate and relive experiences, establishing relationships between theory and practice. The research and intervention process took place through the Teachers Portal - UFSCar in progress: "Casos de Ensino e Teorização de Práticas Pedagógicas - professores alfabetizadores [Cases of Teaching and Theorizing Pedagogical Practices - literacy teachers], the prospect of continued training of sixteen teachers in the same stage of elementary school (Early Years - 1st, 2nd and 3rd year), which act as literacy. To accomplishment this study, of qualitative approach, the research aimed to analyze episodes of the professional development process experienced by literacy teachers to make use of teaching cases in the virtual environment, while the possibility formative and investigative. Thus, were worked in cases depict events related to the daily lives of literacy. The achieved results in the research indicate the potential of teaching cases in / for learning and for professional development of teaching. In general, the strategies of analysis and preparation of teaching cases enabled knowledge related to the teaching and learning of language were explained and (re) assessed by literacy. The use of teaching cases and case methods allowed reflections if they were present and provided evidence of the doubts, certainties and contradictions that characterize and guide the professional practice of literacy. These results indicated that it is possible to highlight points deserve highlights and others who deserve to be reconsidered for future training and investigative processes with teaching cases.
Efeitos da terapia laser de baixa intensidade na regeneração muscular de ratos após criolesão
(Universidade Federal de São Carlos, 2013-03-01) Rodrigues, Natalia Camargo; Renno, Ana Claudia Muniz; https://lattes.cnpq.br/4106611304688552; https://lattes.cnpq.br/8670098348397578
Skeletal muscle injuries from sport activities are usual, but despite the inherent healing capacity of muscle tissue, this process can be impaired depending on the injury extension, what can lead to atrophy, fibroses, pain and functional recovery incomplete, increasing the risks of recurrent lesions. In addition, biophysical and biochemical resources have been studied in an attempt to enhance the muscle regeneration process, as the low level laser therapy (LLLT). Many studies have showed that this therapeutic modality stimulates positives responses during muscle healing process. Thus, two studies were performed with the aim of evaluating the effects of LLLT (InGaAlP 660 nm), with the fluences of 10 J/cm2 and 50 J/cm2, during Tibiales anterior muscle regeneration after cryolesion. Sixty three Wistar rats (3 month of age, ±300 g) were randomly divided into 3 groups: injured control group (CG) injured animals without any treatment; treated group, at 10 J/cm2 (G10) and treated group, at 50 J/cm2 (G50). Each group was divided into 3 different subgroups (n=7) and on days 7, 14 and 21 post-injury, were sacrificed. The laser irradiation was performed at a single point and started 48 hours after injury, 5 times per week (each 24 hours), followed by an interval of 48 hours. At the first study, the effects of LLLT were analyzed on the muscle regeneration related on molecular mechanisms involved at repair process. The results showed a downregulation of mRNA Cox-2 expression in all treated groups after 14 and 21 days. On day 7, both treated groups had a downregulation of mRNA Vegf expression, but had a increase after 14 and 21 days of treatment, meanly at 50 J/cm2. The mRNA MyoD expression was upregulated with the higher fluence, in all periods evaluated, and with the lower fluence the MyoD levels increased only after 21 days. The Myogenin expression was downregulated in both treated groups on day 7, and was upregulated with dose of 10 J/cm2 after 21 days. These responses suggest that LLLT can improve the skeletal muscle regeneration through the gene expression stimulation. At the second study, the effects of LLLT were evaluated during muscle regeneration, through histological and immunohistochemical aspects. The treated groups had an inflammatory process modulation after 7 days. On day 14, the treated animals, with both fluences, showed organized new muscle fibers and less granulation tissue. After 21 days of lesion, all groups had complete tissue repair. Moreover, the irradiated groups had less necrosis area at the first experimental period evaluated, and, also had more blood vases quantity after 14 and 21 days, at 50 J/cm2. The immunohistochemistry analysis showed Myogenin expression in all experimental groups after 7 and 14 days, and at day 21st; the immunoexpression was detectable in the control group and in the treated group with lower fluence. Superior MyoD expression appeared in both treated groups during all evaluated periods. Concluding, both fluencies of LLLT played positive effects on muscle repair. Such findings are fundamentals to elucidate the biological and molecular mechanisms involved in the skeletal muscle regeneration.
Propriedades fotoluminescentes e fotocatalíticas dos tungstatos de ferro e manganês
(Universidade Federal de São Carlos, 2013-03-01) Almeida, Marcio Aurélio Pinheiro; Longo, Elson; https://lattes.cnpq.br/9848311210578810; https://lattes.cnpq.br/2880967876823602
MnWO4 and FeWO4 compounds were synthesized, employing AOT, SDS, CTAB, EG, and PEG 200 as surfactants agents, which was proved by X ray diffraction. Furthermore, these compounds were also characterized by vibrational spectroscopy in the infrared, Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM images showed that the morphology of the compounds of MnWO4, were changed to plates (AOT and SDS) and particles (CTAB, PEG and EG 200) when the surfactants were employed in the reaction, while the compound achieved without the use of surfactants, showed morphology of rods. The band gap values of band gap found for the compounds of MnWO4 ranged from 2.1 to 2.9 eV, while the values of "band gap" for compounds of FeWO4 were much smaller, ranging between 1.6 to 2.2 eV, and these values were lower than the values of band gap of the compounds obtained without the use of surfactants. These behaviors can be attributed to the presence of defects. The data photoluminescence in general all compounds obtained with surfactants, both of MnWO4, as those of FeWO4, showed photoluminescence intensity far greater than the reference compounds (MnWO4 and FeWO4) which can be assigned to different types of surface defects and interactions between different clusters. The photodegradation of the dyes rhodamine B and rhodamine 6G by nanocrystals MnWO4 proves ineffective, while, FeWO4 compounds were more effective, giving greater emphasis to the compounds obtained with EG and PEG 200.