ISSN 0187-893X       ISSNE 1870-8404
Martes, 28 de Marzo del 2017

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Papers of the current issue

Chronological map of the evolution of acid-base theories: a potential educational tool for historical background in chemistry teaching

Felipe de Moura Souza, Eliana Maria Aricó

Science has been taught and understood by students as a result of events in linear time, successive and interrelated. This way of thinking about the scientific work has led to the misunderstanding of the nature of science. To contribute to combat this distortion in the perception ofscience, this study aims to report a literature review on the concepts of acids and bases, starting from the analysis of the progress of these theories in history, especially in the nineteenth and twentieth century. The progress of these theories is represented by means of a chronological map that interrelates the scientific research lines of the main researchers that have developed theories that area. The chronological map aims to be an effective teaching tool to illustrate the evolution of science in the development of acid-base theories. It may be used in the classroom by allowing students to understand the connections of scientific theories and analyze the profile of developments in scientific work.

Propiedades del triioduro de antimonio fotodescomposicin y acidez de Lewis

Juan J. Testa, Fernando Yonni, Héctor J. Fasoli

Antimony triiodide is aversatile compound that is not studied in detail in the current Inorganic Chemistry literature at the undergraduate level. In this work we propose a simple microscale synthesis describing two other interesting properties which are not reported in the common chemical literature: photo-oxidation and acid---base reaction in non-aqueous media. Theexperimentcanbesuccessfullyandsafelyachievedinatwo-hourlabclassatthesophomore level.

Using Avogadro as molecular editor for Odontology first year students in a course of General and Organic Chemistry

Celia Torres Quezada, Patricia Varela Gangas, María Verónica Frías, Patricio Flores-Morales

Today, molecular viewers are an undeniable reality in the classroom. This type of softwares allow students the 3 dimensional development. In this study, free access molecular viewer Avogadro was used. The using of the program was successful not only in the 3 dimensional training, but in the pointing out of carbons quilarity of optical isomers. In fact, the velocity was reduced to a half part in comparison to bidimensional molecules. On the other hand, students were prone to the usage of Avogadro in basic and advanced chemical courses.

Usefulness of the Chemistry according to Mechanical Engineering students: Effect of a teaching proposal

María del Mar López Guerrero, Ángel Blanco López, José Serrano Angulo

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Analysis of the perceptions of students on the flipped classroom methodology for teaching advanced techniques in analysis laboratories of residues of veterinary drugs and contaminants

Lina Melo, Ramiro Sánchez

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Pulmonary tuberculosis: The global epidemic continues and the teaching of this topic is crucial and complex

Luis Manuel Perea-Mejía, Jacqueline Ávila-de Jesús, Raúl Garza-Velasco

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Drug discovery and development: A computational approach

José L. Medina-Franco, Fernando D. Prieto-Martínez, Fernanda Saldívar-González

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