Abstract Introduction: Patients in the postoperative period of coronary artery bypass grafting (CABG) present respiratory and autonomic dysfunctions. In this sense, cardiovascular physiotherapy has been offered as an indispensable differential for the improvement of the prognosis of this population. Heart rate variability is a simple, noninvasive method to analyze autonomic modulation, as well as the accentuation maneuver of respiratory sinus arrhythmia, which demonstrates the parasympathetic autonomic control over the heart. Five patients undergoing cardiac surgery performed a protocol of cardiovascular physiotherapy in the postoperative period and had their data referring to the preoperative period, the 1st and 4th postoperative days analyzed.

This work aims at investigating and proposing strategies to improve the comprehension of Chemistry concepts by high school students. One of these strategies consists in workshops that emphasize the notion of work as a general educational principle, in the perspective of polytechnic education. Interviews (pre and post-workshops) were used to evaluate the results. In post-workshop interviews, a significant incorporation of scientific concepts was observed, as well as a considerable improvement in the interpretation of experiments.

As concepções sobre o papel da experimentação no ensino vigentes nas décadas de 1960 a 1990 não levavam em consideração questões ambientais. De modo geral, este fato pode ser observado também nos dias atuais. Isso se consubstancia na falta de gestão de resíduos químicos produzidos em aulas experimentais e na ausência de políticas que garantam a segurança de alunos e professores, diretamente, e da comunidade escolar, indiretamente, conforme levantamento realizado em 26 escolas públicas do Distrito Federal. O fazer consciente da experimentação na formação inicial e continuada de professores requer que, além da problematização e de discussões sobre conceitos científicos, sejam incluídos aspectos ambientais, tornando a experimentação uma ação de educação ambiental.

Conceptions of the role of experiments in chemical education, which were dominant from the 1960's to 1990's, did not take into consideration environmental issues. Generally, this fact can also be observed at present in the lack of management of chemical wastes produced in experimental classes and in the lack of policies, which guarantee the security of students and teachers, and of school communities, according to research carried out in 26 public schools of Distrito Federal in Brazil. Conscientious practice of experimentation in initial and continuous formation of teachers requires that, besides the problematization and discussions of scientific concepts, environmental issues be included, so that experimenting could turn into an environmental education action.

Resumo: Partindo de reflexões sobre o papel da cultura, discutem-se no presente artigo pressupostos metodológicos da pesquisa em formação de professores. Na integração ensino-pesquisa-extensão, defende-se um modelo de pesquisa no qual os problemas identificados pelos professores sejam os enfocados em ações de formação continuada. Dessa forma, defende-se a formação continuada em processo que privilegie a reflexão sobre a prática docente.

Abstract: In this paper, we discuss methodology assumptions of research on teacher training, based on reflections on the culture role. We support a research model in which research questions emerge from teachers' concerns of teachers in-service. Likewise, we try to integrate the undergraduate training teacher course from research data collected in community activities of teacher training in-service, in a process that prioritizes the reflection on the teaching practice.

This study aimed the investigation of the reasons that led undergraduate students of the Chemistry course at Universidade de Brasília to abandon the course before its conclusion. From the former students' point of view, the reasons that led them to leave the course were related to aspects of their academic life prior to university entrance, expectations which failed to be met by the course, the intricate nature of the academic system, personal and social experiences. Abandonment is a consequence of the problems he encounters during the course and takes on a connotation of protest, more than of failure.

This article presents the conception, principles and academic structure of the evening course leading to the formation of a Licentiate in Chemistry, at the University of Brasília. The curriculum has been carried out since the beginning of 1993. This curriculum has as its basic axis the graduation of future teachers integrated with the conceptual formation in Chemistry. Interdisciplinary actions are planned between the Chemistry Department, the Psychology Institute and the Faculty of Education so as to provide mechanisms which would allow the licenciate to acquire teaching experience along the course.