426 resultados para Investigações


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We report here some outcomes of a research related to a didactical experience aiming to integrate the History of Science to the Physics Teaching, taking as background the historical development of the gravitational attraction. The research, of qualitative approach, is a case study and it was carried out in a sample of eleven students belonging to an undergraduate physics program (called licenciatura in Brazil) designed to from High School physics teachers in a São Paulo State Public University. We tried initially to reveal prospective teachers’ conceptions in order to provide a prepare that was used to guide the activities from the reality’s diagnosis. The aim was to promote discussions on the existence and persistence of alternative conceptions, on the historical evolution of the subject gravitational attraction, through readings and debates of texts contemplating recent subjects on the Science Education research, in order to generate dissatisfaction with traditional teaching models. The future High School physics teachers were asked to construct their own teaching proposal, through the development, in real situations, in a High School, of a minicourse based on: debates and synthesis developed in University classroom, the History of the Science and the student’s alternative conceptions. In this paper we will analyze future teachers’ alternative conceptions, the development of the course proposed, and details of the mini-courses taught by the prospective teachers in real situations, among High School students, its coherence and the posture changes observed in them.

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Some remarks on how Cultural History has been used in Mathematics Education are the main focus of this paper. It tries to discuss, basically, three works (In Cold Blood, by Truman Capote; O crime do restaurante chinês, by Boris Fausto; and Os protagonistas anônimos da História, de Ronaldo Vainfas) in order to present some perspectivas about narratives and textual elaboration in the field of Historiography.

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The discussion about some features of the general framework which allows the use of Oral History in Mathematics Education is the main theme of this paper. Also the conception about what Oral History is, its theoretical baskgrounds, some of its purposes and the range of its results to Math Education research community are considered, as well the link between such method and the narratives, focusing what narratives are and how narratives can be analysed. A brief description of specific themes and researches developed in such approach, in Brazil, ends this article.

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The main objective of this survey is describing signly the metaphor learning resource, with focus on biology education. Our teorical reference is the peircean semiotics, because it means solid heritage to code surveys implicated at science education, it led us to do an explanation about the main lines about that reference, addressed to researchers and lecturers interested in those reasonings. In the description yearned, another objectives appear: demonstrate diferences between metaphor/analogy and pragmatic analogy; to list metaphors, from cell representation analysis, and argue about principals diferences and probable cognitive consequences between the metaphor event in the visual representation and speech sentences. Therefore we analysed the animal cell of a high school first grade studying book – biology – cell biology – used by São Paulo and another state students. The findings demonstrate the undeniable importance of the metaphor as a learning tool in the biology education, and new findings about that, such as its limits in the concept elaboration, gnosiologic consequences for receptioning, the search needs for propositions– pictures between concept relations – in the science speech construction, and other results.

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The main intention of this paper is to present how a Research Group in Mathematics Education – known as GHOEM, “Oral History and Math Education” Research Group – is taking Oral History into account in Mathematics Education researches, sometimes challenging and expanding this specific methodological approach in order to better answer questions in Math Education field. The composition of such group, as frequently occurs in a research community, is dynamic. So, the works taken into consideration in this paper were those written by researchers which were GHOEM members at the time they published their results.

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Considering the importance that the discussion of concepts related to genetics has on the society and the necessity to approach science as a dynamic and historical activity, it will be discussed an essential concept to the understanding of biological inheritance: the concept of gene. This way, the article aims to discuss the differents concepts of genes in the history of biology and the relevance of addressing in teaching context this concept in a systemic perception of phenomena. Also, the paper have an analyses of the ideas about the concept of the gene from teachers from two university. The results indicate the presence of different definitions of the gene in the discourse of university teachers, with the predominance of gene concept as a structural, functional and/or informational unit.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The aim of this paper is to characterize and discuss the School Physical Education as a profession and subarea of research in the broader academic fi eld of Physical Education and educational research. To do that, it initially defi nes the difference between research in School Physical Education from research about School Physical Education, and point out the themes and research hypotheses for this subarea. It also analyses 289 articles characterized as research in School Physical Education, published in 11 Brazilian periodicals, classifying them in the following categories: “level of schooling”, “bodily practice” and “theme”. The results indicate that the majority of studies are carried out in elementary school, in “games” and “sports”, and in descriptive and interpretative research in School Physical Education practices in several dimensions and interrelations. In conclusion, it points to the need to a focus in the research in teaching, the implementation of public curricula, and teacher education. Finally, it alerts to the need for Brazilian postgraduate programs in the academic fi eld of physical education to invest more in research in School Physical Education subarea.

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We analyzed the National Curriculum for Secondary Schools with respect to the ontological, epistemological, historical, social and conceptual biology. This study aims to bring information and thinking about the inclusion of history and philosophy of biology for secondary education and for teacher training. We performed an analysis of PCNEM, PCNEM+ and Curriculum Guidelines as a whole from established categories. The results indicate a predominance of the ontological view of mechanistic biology. Epistemologically, although acknowledged, the question of scientific method is rarely discussed. The historical approach and social scientific activity and scientific knowledge are recognized by the documents, but an instrumental view prevails. The conceptual aspects are comprehensive and take into account the theories of structural biology. A philosophical discussion on the biology is missing in the parameters, indicating the need for the inclusion of issues related to ideas of determinism, chance and teleology.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Introduction: Bamboos belong to the family Graminae, Bambusoidae subfamily, represented by about 1,250 species worldwide. Originally employed in construction and power, are currently the subject of investigations related to its therapeutic properties in neoplasms. The main species used for therapeutic purposes based on popular knowledge are: Phyllostachys nigra; Bambusa breiflora; tuldoides Bambusa textilis and Bambusa. The literature on the therapeutic action of bamboo species is scarce, but recent studies report a promising effect in the treatment of cancer and other chronic diseases. Objective: This study aimed to evaluate qualitatively the phytochemical composition of plant extract obtained from the leaves of the bamboo species Bambusa textilis, comparing this composition from vegetable leaves with 18 and 24 months of age. Methodology: After collecting plant leaves with 18 or 24 months, they were identified and submitted to drying and milling. For qualitative analysis of its components were employed methods of macroscopic evaluation (mucilage), method of benzoin (resin), reaction Shinoda (flavonoids), reaction with gelatin solution (tannins), boiling and foaming (saponins) and jobs of reactive Wagner, Bertrand, Dragendorff, Mayer, picric acid and tannic acid (alkaloids) (Biavatti; MILK, 2007). Results: in the youngest leaves were found positive for alkaloids, flavonoids, resins and saponins. In the leaves of the plant with 24 months were found only alkaloids flavonoids and resins. Conclusion: the composition of vegetable substances were found associated with a significant therapeutic potential difference and the phytochemical composition in comparison with plant leaves 18 or 24 months. Additional studies are needed to quantify these components, as well as the clarification of its action in the fight against cancer and chronic diseases.

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The quantitative and qualitative increasing of researches in Science teaching imposes the periodical mapping need of scientific production about the subject, with a view to identify its own characteristics and tendencies. In this context, researches such as “State of art”, given his executrix character, constitute in modality inquiring that allow us to outline historical scenes for a given area (or subarea) of knowledge. In this light, this work aims to outline the panorama of Brazilian academic production, represented by dissertations and thesis, in evolution teaching between 1990- 2010. The documents susceptible of analysis were raised in three online data basis and its selection happened from the reading of titles, abstracts and key-words with views to identify the dissertations and thesis that truly approached the Evolution Teaching. The found results evidence the predominance of dissertations related to the number of thesis and the concentration of academic production in Evolution Teaching in Brazil south-east region, especially in São Paulo state. In researches trends we verified the prevalence of investigations related to the previous conceptions of students and professors (in all teaching levels) and to teacher training.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)