Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Las mitocondrias son consideradas como una red mitocondrial donde se producen numerosos eventos de fusión y fisión, en las que el transporte y degradación están altamente regulados. En el cerebro, las mitocondrias y los procesos involucrados en su dinámica son importantes para sostener funciones neuronales y alteraciones en su función e integridad pueden contribuir al daño sináptico en enfermedades relacionadas con la edad como la Enfermedad de Alzheimer. En esta revisión mostramos un panorama acerca de las funciones mitocondriales en el cerebro y en los procesos de plasticidad neuronal, y hacemos énfasis en la evidencia que existe en relación con la disfunción de las mitocondrias en pacientes y en modelos de la enfermedad de Alzheimer.

En este trabajo se presenta cómo se abordaron los problemas que, ante la contingencia sanitaria, se tuvieron que enfrentar para poder dar clases a distancia. Estos fueron desde, el entrar en contacto con el servicio de videoconferencia Google meet, hacer uso de la plataforma Google drive, o de la plataforma Microsoft Teams, así como el de enfrentar el problema de estar en una sesión en la que no se puede observar a los alumnos y no poder hacer uso del pizarrón. Y la principal limitante: no poder efectuar, físicamente un experimento de laboratorio, en un curso experimental

Se propone la filatelia como fuente histórica para la historia de la química en el siglo XIX. La iconografía filatélica consultada y presentada, da cuenta de la obra de personajes, que como Dalton, Davy, Berzelius, Thénard, Avogadro, Gay-Lussac, Charles, Loschmidt, Perrin, Wöhler, Kekulé, Bútlerov, Liebig, Mendeleiev, del Rio Fernández, Pasteur, Zinin, Berthelot, Kirchhoff, Döbereiner, Gadolin, Vauquelin, Pelletier, Caventou, Śniadecki, Heller, Bayer, Gmelin, Irinyi, von Pettenkofer, Nencki, Lampadius, Schönbein, Teclu, von Than y Voskresensky, han dejado huella en la historia de la química.

Chemical phenomena can be explained using levels of representation consisting of macroscopic, submicroscopic, and symbolic representations. Explanation of representation levels or known as multiple representations in chemistry learning is very important to provide students with a complete understanding of the material concept being studied. One of the chemistry subject matters that requires multiple representation explanations is the colligative properties of solutions. The research aims to develop teaching materials of mobile apps based on multiple representation with learning cycle 7e model on the material colligative properties of solutions which is feasible as a material resource. Research which is conducted the research development by using the 4D model Thiagarajan, but research is limited only in three stages namely the define, design, and develop stages, then continued with the revision of the final product of teaching materials. The validation test of teaching materials was carried out by 2 chemistry lecturers and 1 chemistry teacher. Aspects of validation include assessing aspects of content, construct, language, media, and conformity with the learning cycle 7e syntax. The readability test was carried out by 20 students of XII class IPA SMA Negeri 1 Tumpang. Aspects of readability test include assessment of appearance, presentation material, and benefits. The data obtained were analyzed by percentage and interpreted to determine the feasibility of developed teaching material. The results of the validation test obtained a percentage of 84% (very feasible) and a readability test of 92% (very feasible). This shows that the multiple representation-based mobile apps teaching materials with the 7e learning cycle model on the colligative properties of the solutions that have been developed are very feasible to be used as teaching materials.

A virtual laboratory is a growing research topic in chemistry education during the COVID-19 pandemic. It is a promising alternative solution to equip students with laboratory knowledge and skills. A review of the extent of research and publications using virtual laboratories is needed to map the opportunities and challenges on this topic. Therefore, this study reviews bibliometric literature on virtual laboratories in chemistry education. Free VOSviewer and PoP software were used for data mining and mapping. A total of 117 related articles retrieved from the Google Scholar database from 2011 to 2021, selected based on the title and abstract requirements, were used as the source of the review. This study indicated that a virtual laboratory had been developed on various chemical topics such as chemical bonds, chemical equilibrium, and acid-base. Developing virtual laboratories on other topics that involve students as developers by providing STEM projects can be an alternative topic for further research. It is expected that this study provides a mapping of virtual laboratories in chemistry education to better understand the challenges and opportunities of implementing and researching virtual laboratories in chemistry education

Los esfuerzos por mejorar el desempeño de los estudiantes en temas relacionados con el análisis dimensional caracterizan el ejercicio de docentes asignados al primer semestre universitario, muchos de los esfuerzos se enfocan en presentar ejercicios de análisis dimensional, sin embargo la descontextualización y el atraso tecnológico pueden interferir con la apropiación de los conceptos por parte del estudiante, en el presente trabajo se propone un marco de partida para la construcción de un videojuego que permita comprender mejor las temáticas del análisis dimensional, se realizaron grupos focales e instrumentos para la recolección de información, procurando involucrar  a todos los actores del proceso, finalmente se presenta la construcción de las misiones propuestas para el desarrollo de un documento de diseño de juego.

La tabla periódica es una de las principales herramientas de la ciencia. Desde la educación secundaria hasta medio superior, los estudiantes llevan al menos un curso formal donde se recurre al aprendizaje de los elementos químicos y algunas de sus propiedades. Ésta, ha sido traducida a casi todos los idiomas del mundo, sin embargo, no así a lenguas maternas. Evidentemente, es importante hacer un vínculo entre el esquema científico y cultural, para favorecer las vocaciones científicas en estudiantes de pueblos originarios. En el presente trabajo, se muestra una adaptación de la tabla periódica a la lengua náhuatl, siguiendo tres criterios de traducción específicos para tal fin; I) la etimología del nombre directo; II) la etimología de las palabras de donde proviene el nombre del elemento; III) sus características generales. Vale la pena mencionar, que de nuestro conocimiento, esta es la primera propuesta de adaptación a la lengua náhuatl de una herramienta ampliamente utilizada en la ciencia, y que puede ser una excelente propuesta para implementarla en la enseñanza de la química en escuelas de bilingües habla náhuatl.

This research evaluated the use of assistive technologies in the construction of previous organizers in Chemistry Teaching for a deaf student in the 3rd year of high school, from a state school in Boa Vista, Roraima, Brazil. A didactic sequence based on meaningful learning was organized to address the content of oxygenated functions with the deaf student, and to evaluate the learning process using a Portuguese text-to-lbs translator app. Attention was focused on assistive technology due to the various possibilities of use, which can be used as an aid to the teacher in the absence of a Libras Interpreter Translator (TIL). The results showed that the use of the application combined with teaching strategies that consider the specificities of these students and based on an educational theory, is an element that enhances pedagogical practices, in the construction of strategies and resources aimed at the cognitive development of students, whether they deaf or not.

The use of prototypes in the teaching-learning process promotes in students a greater interest in learning Chemistry, thereby enhance, their capacity for innovation, creativity and problem solving. The use of the Arduino microcontroller and its sensors are widely used for the design of different prototypes, due to their low cost, in addition to having simple programming and open-source software. For the present research, an educational prototype, was developed which performs an acid-base volumetric titration in an automated, way which is made up of mechanical, electrical, as well as 3D printing parts, in consequence can be implemented and improved in engineering careers where chemistry is a fundamental subject.  

Scientific and technological literacy is one of the main objectives of scientific education, however, there are arguments about its definition and possibilities of implementation. There is, though, the consensus that Science teachers (Chemistry, Physics and Biology) have an important role in its promotion. Thus, the present article aimes to analyse elements of Scientifical and Technological Literacy, its concepts and dimensions, in the Pedagogical Projects of Chemistry programs offered on various Brazilian institutions. For such, it was performed a mixed methods research, in which the Pedagogical Projects of 15 Chemistry courses of different institutions from the five Brazilian regions were analyzed in the software Iramuteq 0.7 alpha 2. The results show that the programs indicate the importance of the three dimensions of the STL analyzed in this study, which configures as an argument in favor of further investigations about the implementation of these concepts in the day-to-day practice of these programs.