Síntese do isobutileno e seu emprego em reações de esterificação: propostas de aulas práticas de química orgânica para a graduação

An experiment for the synthesis of isobutylene from tert-butanol dehydratation using oxalic acid as catalyst, followed by preparations of tert-butyl benzoate and tert-butyl cinnamate is described. The synthesis are simple, requiring two periods of 4 hours and are suitable for undergraduate organic chemistry experimental courses.

La internacionalización del aula, un reto para los docentes

Dados ciertos cambios en el ámbito socio político como la globalización, el incremento de la movilidad y las características de la emigración, y en el ámbito educativo europeo, como el proceso de Bologna y el apoyo por parte de las instituciones europeas a los programas de intercambio, el aula de la educación terciaria se está convirtiendo cada vez más en un espacio heterogéneo. Hasta ahora los académicos han esperado y dado por hecho que los estudiantes se adapten a su método y concepto de enseñanza, este naturalmente impregnado por su paradigma cultural, sin tener en consideración diferencias en estilos de aprendizaje, cultura, valores y normas; en otras palabras se ha asumido una enseñanza centrada en el profesor como la única válida y viable. En opinión de las autoras esta actitud no corresponde con la tan proclamada internacionalización de la educación sino más bien con una perspectiva etnocéntrica y desfasada por parte del profesorado. Este artículo postula contemplar al estudiante como un cliente (“personalización de la educación”) y por consiguiente adaptar el estilo docente a la nueva realidad internacional universitaria con dos claros fines: mantener y/o mejorar la excelencia académica y satisfacer al cliente, al estudiante. En la última parte del artículo se proponen innovativos enfoques en la enseñanza que pueden respaldar al profesorado en su tarea de tratar con un alumnado cada vez más diverso

Biodiesel de soja: reação de transesterificação para aulas práticas de química orgânica

The transesterification procedure of triacylglycerides from soybean oil (in natura and waste oil) to give biodiesel was adapted to semi-micro laboratory scale as an additional experimental technique of nucleophilic acyl substitution for undergraduate courses in Chemistry and related areas.

Hacia la autoformación permanente de los docentes en las comunidades de práctica: los talleres de internet en el Aula

El objetivo principal de este trabajo es determinar si las comunidades virtuales de práctica son un espacio adecuado para la autoformación de los docentes. Con este fin, primero se especifican algunos conceptos clave que ayuden a contextualizar el tema de la formación; en segundo lugar se recogen los rasgos que se consideran hoy necesarios para llevar a cabo la labor docente, dibujándose así el perfil “ideal” del profesor en el contexto actual desde distintos ángulos de vista; y por último, se narran algunas experiencias personales en las redes sociales para ilustrar el funcionamiento de este nuevo paradigma social.

Hipertextos fragmentados: Una propuesta para trabajar la competencia lectoliteraria en la formación inicial de docentes

El canon para la formación literaria y la educación literaria en primaria son algunos de los contenidos principales de la asignatura 'Didáctica de la literatura infantil y juvenil" que se imparte en el grado de Educación Primaria de la Universitat de Barcelona. La propuesta de innovación educativa que presentamos consiste en el diseño e implementación de una secuencia formativa dirigida a estos alumnos para ampliar el intertexto lector mediante la lectura y análisis de un corpus de minificciones hipertextuales (Zavala, 2007; Landow, 2009) relacionadas con la literatura de base folklórica y de autor del canon de educación primaria de primeras lenguas. El corpus elegido pertenece al libro Catàleg de monstres (2012) de Masó, minificciones que apelan a la intertextualidad mediante la combinación de múltiples recursos literarios. Palabras clave: Formación inicial de maestros, competencia lectoliteraria, minificción, literatura infantil y juvenil. ENGLISH SUMMARY Fragmented Hypertexts: a proposal to develop literacy competence in initial teacher training Literary canon for primary children and literature education are some of the main contents of the subject 'Teaching of Children's Literature' taught in the Primary Education degree at the University of Barcelona. The proposed educational innovation we present is the design of a teaching sequence targeted to these students to expand their reader intertextuality by reading and analysing hypertext mini fictions (Zavala, 2007; Landow, 2009) related to basic folk literature from the primary school literary canon. The corpus chosen is from the book Catàleg de monstres (2012), written by Masó, selected mini fictions constantly appealing to intertextuality through the combination of multiple literarcy resources. Key words: Folk literature, teacher training of primary education, hypertext mini fictions, literary competence.

Preparação de N-alquil derivados do 1-bromo-2,4-dinitrobenzeno e do 1-cloro-2-nitrobenzeno: Uma alternativa às aulas práticas de substituição nucleofílica aromática

Preparation of the title compounds are described as an alternative nucleophilic aromatic substitution for practices in the graduate laboratory. The low toxicity and disponibility of the reagents make a suitable procedure approach to experiments regarding this aromatic reaction.

A problematização das atividades experimentais na educação superior em química: uma pesquisa com produções textuais docentes

Through the analysis of articles with proposals for experimental activities and with current pedagogical, epistemological and environmental discussion on experimentation by Chemistry professors, this paper investigates ways of highlighting relevant methodological characteristics that can be incorporated in experiments. Based on analysis of the suggestions for experiments it appears that of particular importance are: a concern for students' physical welfare and for the effects of residues; the need to confront an impoverished infrastructure that hinders experimentation; and the valorisation of clarifying student knowledge. It argues in favour of the need to set out the problems of experimentation in educators' professional development.

A formação dos docentes de química: uma perspectiva multivariada aplicada à rede pública de ensino médio de Goiás

This paper presents a multivariate statistical analysis as a valuable tool for educational management applied to public high school chemistry teacher formation. From 2003 to 2007, a decrease of 10% in the number of public high schools was seen, as well as a reduction of 7% in the number of teachers. Contrarily, there was an increase in the number of university graduate teachers. Principal Component Analyses reveal that in 2003, most chemistry teachers were not university graduates. In 2007, eight Regional Offices of Education reported teachers holding academic degrees, qualifying them as chemistry teacher in the school system

A problematização das atividades experimentais na educação superior em Química: uma pesquisa com produções textuais docentes - parte II

Through the analysis of articles with proposals for experimental activities and with current pedagogical, epistemological and environmental discussion on experimentation by Chemistry professors, this paper investigates ways of highlighting relevant methodological characteristics that can be incorporated in experiments. 102 articles from national periodicals were analysed, all of which suggested experiments for use in Chemistry higher education. Based on analysis of the suggestions for experiments it appears that of particular importance are: visions, such as those that explain a belief that experimentation incentivizes motivation and conceptual learning; awareness of observation influenced by empiricism; and "errors" of students, which enrich their knowledge.

Implantação e implementação das normas das Boas Práticas Laboratoriais (BPL) no laboratório de análises de resíduos da Universidade Estadual de Campinas

In the context of quality and good laboratory practices, the article recovers some historical data. From a specific Institutional situation (CPQBA/UNICAMP), is presented an experience of establishing and implementing a standard (NIT-DICLA-035) for good laboratory practice according to definitions of the Brazilian authority (INMETRO) responsible for regulating, monitoring, supervising and recognition in this area. The issue aims to focus on studies of pesticide residues in GLP parameters.

Uso de diagrama V modificado como relatório em aulas teórico-práticas de química geral

In this article, we present data from a study in practical classes for General Chemistry. To this end, it was proposed to use a modified V diagram to replace traditional reporting. These reports consist of material commonly prepared in the subject, including introduction, materials and methods, results and discussion and conclusions. From the preparation of the modified V, the students were able to establish relationships between the theoretical and methodological aspects necessary for understanding the objects and events studied. Thus, student learning can be evaluated in light of the Theory of Meaningful Learning.

O CONHECIMENTO PEDAGÓGICO DOS DOCENTES DE QUÍMICA DO ENSINO SUPERIOR

This study aims to investigate the pedagogical knowledge of Higher Education Chemistry teachers. From the perspective of qualitative research, questionnaires were given, there was documentary analysis and were interviewed twenty-six teachers of the Institute of Chemistry of an institution of state public higher education of São Paulo. Discussed the relevance of pedagogic disciplines in Postgraduate courses and participation in monitoring programs and teacher training in higher education teacher formation. It was found that most teachers lack pedagogical training and some do not show interest in the subject, but look for ways to overcome the difficulties encountered. The results obtained demonstrate the urgency to rethink and reorganize the PostGraduate courses before the real need for training of teachers for higher education.

Animais em aulas práticas: podemos substituí-los com a mesma qualidade de ensino?

Com o objetivo de verificar a possibilidade de substituição de animais em aulas práticas, comparou-se o grau de aprendizagem entre duas turmas do curso de Medicina submetidas a aulas distintas, com e sem o uso de animais. Foram verificados, também, os sentimentos despertados pela presença destes animais. Os alunos ingressantes do curso de Medicina foram divididos em dois grupos, estabelecendo-se dois protocolos de aulas práticas, um deles com animais de laboratório e outro sem. O assunto, comum às duas aulas, refere-se ao estudo de técnicas citológicas. Ao final, foi entregue um questionário para avaliar as técnicas de aprendizagem, bem como os sentimentos vivenciados pela presença dos animais. Verificou-se que a curiosidade foi o sentimento mais freqüente em ambos os sexos, havendo um predomínio de sentimentos negativos entre as mulheres, diferentemente dos homens, nos quais predominaram sentimentos positivos e indiferença. As duas turmas apresentaram desempenho semelhante com relação às questões específicas. É preciso reavaliar as metodologias de várias aulas do curso médico, já que há evidências de que, na maioria das situações, o conhecimento pode ser obtido por meio de outras fontes, respeitando a vida animal e induzindo valores éticos aos alunos.