DD. Biología

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Identificación de isoformas producto de empalme alternativo en el gen ama1 de Toxoplasma gondii

Hernández de los Ríos, Alejandro | 2008-11-05

El empalme alternativo de genes produce diferentes transcritos de ARNm a partir de un solo gen. Aunque no se ha valorado su importancia en los genes de Toxoplasma, su alta frecuencia en genes eucariotas sugiere que este es uno de los mecanismos más importantes en el aumento de la diversidad proteica. Como todas las proteínas de micronemas, AMA1 es secretada por los taquizoítos de Toxoplasma durante el proceso de invasión, siendo una de las piezas indispensables para dicho proceso.

Caracterización de microorganismos saprófitos de bosque húmedo premontano (Circasia – Quindío)

Rincón Andrade, Mónica Liliana | 2009-10-14

En general, no tenemos idea de la magnitud de especies de microorganismos que habitan el planeta. Hasta el momento tenemos conocimiento de aquellos que afectan favorable o desfavorablemente la salud humana y la de los animales y las plantas. Se estima un registro de 4.000 especies de virus, 4.000 de bacterias, 72.000 de hongos y 40.000 protozoarios. A pesar de estas cifras, apenas comenzamos el conocimiento de las especies que tienen interacciones o simbiosis con otros organismos (Toro Castaño D. 2006).

Influencia de la aplicación de estrategias pedagógicas con enfoque cooperativo en el aprendizaje de los estudiantes de grado 3º de la institución educativa Baudilio Montoya Calarcá Quindío

González Abello, Jennifer Andrea | 2017-03-27

Collaborative learning is an approach that allows you to contextualize the situations in which student are whit an environment to optimize individual and group skills from interaction between the students and the teacher. Work in collaborative groups is a tool that benefits the power or learning for students, since in these faced the possibility of providing know ledge, develop skills and training, to learn how to work together with one goal in common. In this research, a work was done with third grade students, which set out work under the collaborative learning approach during the third period of the year 2016, to determine the influence of the application of teaching strategies with this approach in the learning process. This has made a diagnosis of the students, at the beginning of the course in order to compare the results to the end and thus defining the effectiveness of the work done with the students. The analysis of the obtained data gave results which allowed an improvement in the learning of content, especially in those groups of less know ledge at the beginning of the process. It was found that students were able to improve their form of expression, which was reflected in the responses obtained, since they were more coherent and comprehensible. The participation and responsibility in the development of each activity is likewise favored. Thus the collaborative learning can be assumed as a more important as this and effective teaching approach can be used to provide students whit skills for life in society

Composición y estructura de bandadas mixtas de aves en un bosque alto andino de los andes centrales de Colombia

Castaño Osorio, Esteban | 2016-12-31

Mixed-species bird flocks as a natural phenomenon, represents an important biological characteristic of avian community in high mountains regions.