Livro didático público paranaense "lingua portuguesa e literatura" : o professor-autor e o gênero discursivo

Orientadora: Profa. Dra. Iara Bemquerer CostaAutor não autorizou a divulgação do arquivo digitalTese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Humanas, Letras e Artes, Programa de Pós-Graduação em Letras. Defesa: Curitiba, 23/04/2012Bibliografia: fls. 163-178Área de concentração :Resumo: Esta pesquisa descritivo-explicativa tem como objetivo averiguar a relacao dialogica entre o Livro Didatico Publico Paranaense \Lingua Portuguesa e Literatura. (LDP-PR) e os livros representantes do genero discursivo Livro Didatico de Lingua Portuguesa (LD-LP). A partir de uma perspectiva socio-historico-discursiva e empregando fontes bibliografica e documental, desenvolvemos esta pesquisa em duas etapas. Na primeira, procuramos efetuar uma reflexao teorica sobre os Generos Discursivos (BAKHTIN) e sobre como a abordagem sociointeracionista se apropria desta concepcao bakhtiniana e discute a questao da didatizacao dos generos (SCHNEUWLY e DOLZ). Na segunda, aplicamos estes pressupostos ao LDP-PR com o intuito de averiguar o encaminhamento didatico dado aos textos de generos discursivos empregados neste material didatico. A partir desta averiguacao do conteudo tematico do LDP-PR, realizada pelo trabalho com as praticas de leitura, escrita e oralidade, buscamos sustentacao para a analise deste LD como um exemplar do genero LD-LP. Nossos resultados mostram que o LDP-PR inova na escolha do conteudo tematico, mas mantem o estilo (marcado pelo emprego de discursos injuntivos, explicativos e expositivos) e a construcao composicional (de textualidade multimodal) tipicos do genero LD-LP. Creditamos a autoria multipla (constituida por professores da rede escolar), marcada pela experiencia reduzida e a merce da Secretaria de Estado da Educacao do Parana (SEED-PR) este apego ao genero consolidado.Abstract: This descriptive-explanatory research aims to investigate the dialogic relationship between the Parana‘s Public Textbook "Portuguese and Literature" (LDP-PR) and the representative books of the discursive genre of Portuguese Textbook (LP-LD). From a socio-historic-discursive perspective and by the use of bibliographical and documentary sources, we developed this research in two stages. In the first one, we carried out a theoretical reflection about the Discursive Genres (BAKHTIN) and how the social interactionist approach appropriates this Bakhtinian concept and discusses the issue of making genre educational (SCHNEUWLY and DOLZ). In the second one, we applied these assumptions to the LDP-PR with the intent of investigating the educational directions given to the texts of discursive genres employed in such a teaching materials. From this investigation of the LDP-PR‘s thematic contents, performed through the work with reading, writing and speaking skills practices, we sought support for the analysis of this LD as an exemplar of the LD-LP genre. Our results reveal that the LDP-PR innovates the choice of the thematic content but retains the style (marked by the use of injunctive, explanatory and expository discourses) and compositional construction (multimodal textuality) that is typical of the LD-LP genre. We attribute to the multiple authorship (made up of teachers from the public educational system), marked by limited experience and at the mercy of the Parana‘s State Department of Education (SEED-PR), this attachment to the consolidated genre

Platelet activation after presyncope by lower body negative pressure in humans.

Central hypovolemia elevates hemostatic activity which is essential for preventing exsanguination after trauma, but platelet activation to central hypovolemia has not been described. We hypothesized that central hypovolemia induced by lower body negative pressure (LBNP) activates platelets. Eight healthy subjects were exposed to progressive central hypovolemia by LBNP until presyncope. At baseline and 5 min after presyncope, hemostatic activity of venous blood was evaluated by flow cytometry, thrombelastography, and plasma markers of coagulation and fibrinolysis. Cell counts were also determined. Flow cytometry revealed that LBNP increased mean fluorescence intensity of PAC-1 by 1959±455 units (P<0.001) and percent of fluorescence-positive platelets by 27±18%-points (P = 0.013). Thrombelastography demonstrated that coagulation was accelerated (R-time decreased by 0.8±0.4 min (P = 0.001)) and that clot lysis increased (LY60 by 6.0±5.8%-points (P = 0.034)). Plasma coagulation factor VIII and von Willebrand factor ristocetin cofactor activity increased (P = 0.011 and P = 0.024, respectively), demonstrating increased coagulation activity, while von Willebrand factor antigen was unchanged. Plasma protein C activity and tissue-type plasminogen activator increased (P = 0.007 and P = 0.017, respectively), and D-dimer increased by 0.03±0.02 mg l(-1) (P = 0.031), demonstrating increased fibrinolytic activity. Plasma prothrombin time and activated partial thromboplastin time were unchanged. Platelet count increased by 15±13% (P = 0.014) and red blood cells by 9±4% (P = 0.002). In humans, LBNP-induced presyncope activates platelets, as evidenced by increased exposure of active glycoprotein IIb/IIIa, accelerates coagulation. LBNP activates fibrinolysis, similar to hemorrhage, but does not alter coagulation screening tests, such as prothrombin time and activated partial thromboplastin time. LBNP results in increased platelet counts, but also in hemoconcentration

Hematology before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.

<p>Hematology before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.</p

Platelet activity determined by flow cytometry before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.

<p>Platelet activity determined by flow cytometry before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.</p

Plasma markers of hemostatic activity before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.

<p>Plasma markers of hemostatic activity before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.</p

Whole blood coagulation competence determined by thrombelastography before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.

<p>Whole blood coagulation competence determined by thrombelastography before and 5 min after lower body negative pressure (post-LBNP) was ceased because of presyncopal symptoms.</p