The Research Magazine of the Research Directorate of the Universidad de Oriente of El Salvador constitutes an annual publication whose purpose is to promote and disseminate the knowledge derived from the research process in various areas and lines of study. This process addresses problems both nationally and internationally. The content of the magazine is aimed at a specialized audience that includes experts, researchers and both undergraduate and graduate students. For collaborations, exchanges and requests, please contact the Directorate of Research from the Universidad de Oriente through the following means: telephone 2645- 0400 Ext 416 or email investigacion@univo.edu.sv. The copyright of the published articles belongs exclusively to the Universidad de Oriente and may be reproduced for academic purposes as long as the source is cited. However, reproduction in magazines or other mechanical or electronic, as well as for commercial purposes, whether in whole or in part, requires authorization prior written notice granted by the Research Directorate of the Universidad de Oriente or the corresponding author, as appropriate, with written notification of the resolution.