International journal of life sciences & earth sciences 2020-07-07T22:06:59+00:00 Editorial Office Open Journal Systems <p style="text-align: justify;"><strong>IJLE</strong> is published in English and it is open to authors around the world regardless of the nationality. The issued frequency is annual or one issue per year publication.<br>ISSN 2632-9425</p> Transesterification of vegetable oil of higuerilla (ricinuscommunis l) for biofuel generation and cost determination 2020-07-07T22:06:59+00:00 Telly Yarita Macías Zambrano Tanya Beatriz Bravo Mero Verónica Dolores Palma Mendoz Rosa Delfina Giler Giler <p style="text-align: justify;">The limited use of natural resources that are possessed, which implies endemic flora (shrubs, herbs, etc.) and production waste ( leaf litter, various plant fibers, cattle manure, poultry, etc.), which are stacked for later burning and consequently causing pollution to the environment, are some of the problems that are generated at the farm level. The objective of the research was to generate biofuel derived from the mixture of methanol, sodium hydroxide and fig oil in the Mis 2 Principitos del Comuna El Limón farm, Portoviejo canton. Within the methodology to produce biodiesel or biofuel through the transesterification process, castor oil obtained from the fig seed, methanol (methyl alcohol) and potassium hydroxide (KOH) (acid or catalyst) were used. By means of the transesterification in which 0.001 m3 of castor oil, 0.0001 m3 of methanol and 0.01 Kg of potassium hydroxide were used under conditions of an approximate temperature of 60 ° C and 40 rpm of agitation in the stirrer plate, it resulted in 0.001 m3 of biodiesel. Biodiesel can be generated from fig or castor oil, taking advantage of a biomass energy source, which can be used in pump engines for irrigation in farms.</p> 2019-09-09T00:00:00+00:00 ##submission.copyrightStatement## Pinar Del Río geography and connected photovoltaic systems to the grid 2020-07-07T22:06:59+00:00 Antonio Vázquez Pérez Liudmila Fuente Pomares María Rodríguez Gámez <p style="text-align: justify;">The affectations that are reported starting from the use of the petroleum in the energy production of the country in the economic and environmental, open an analysis space for the search of alternative sustainable in the electric generation, based on the employment of the renewable potential that exists in the territories. In these work analyzed the evaluation of the territorial space of the Pinar del Río county was presented that can be used for the development from the connected photovoltaic systems to the grid. Like a viable energy alternative that propitiates the reduction of the environmental impacts and of natural disasters, at the same time that it constitutes an economically sustainable solution, when not having to incur in expenses of resources to acquire the fuel that today has used with those purposes. This county through the years, it has been impacted by phenomena hydrometeorology extreme reason by which you the program of the distributed generation with the objective of giving vitality to the electric service began.</p> 2020-05-29T04:10:25+00:00 ##submission.copyrightStatement## Didactic material for preparation observation and estimation content on subject recreational activities in nature 2020-07-07T22:06:58+00:00 Nidia Esther Gómez Barrientos Randy Fernández Gómez <p style="text-align: justify;">Providing alternative answers to the problem of learning quality is a fundamental concern for educators engaged in the task of promoting personal growth in the teaching-learning process. The research presented refers to the inadequacies in the theoretical-practical preparation in the content of the observation and estimation in the subject Recreational Activities in Nature in fourth-year students of the Physical Culture career. In this sense, the objective was to elaborate a didactic material (Brochure) that provides the development of theoretical and practical preparation in the content of observation and estimation. The methodology that was used as a theoretical method was the analysis-synthesis, inductive - deductive, review of documents and as an empirical method the observation and criteria of specialists; As techniques, the interview, survey, and the statistical-mathematical procedure were used as a percentage calculation, which allowed us to know the theoretical and practical inconsistencies that led to the need to treat the problem under investigation.</p> 2020-05-29T09:06:10+00:00 ##submission.copyrightStatement## Psycho-pedagogical strategy to enhance intrinsic motivation towards learning karate-do 2020-07-07T22:06:57+00:00 Ilska Torres Milanés Osvaldo Jiménez Pérez de Corcho <p style="text-align: justify;">The research has conducted at the EIDE, Captain Orestes Acosta of Santiago de Cuba in the sport of karate-do, to develop a psycho-pedagogical strategy to sensitize trainers, athletes, and others involved in the importance of intrinsic motivation for the teaching-learning process of the same. For the study, methods and techniques were applied such as: observation, semi-structured interviews, and surveys. The qualitative analysis of the results indicates that coaches have inadequacies in the domain of participatory methodologies and the conception and instrumentation of teaching methods, and in athletes the need to improve their teaching-learning processes predominates, wishing to develop effective strategies that favor an integral formation. The psycho-pedagogical strategy that is proposed has based on epistemological, theoretical, methodological, and didactic foundations that support its instrumentation and has made up of three stages with its corresponding actions. The aspects analyzed by the experts, both of the specific actions, and the strategy as a whole achieved positive assessments that validate the design for its subsequent implementation.</p> 2020-06-02T08:30:33+00:00 ##submission.copyrightStatement##