International journal of life sciences & earth sciences <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> SLOAP en-US International journal of life sciences & earth sciences 2632-9425 <p>Articles published in the International Journal of Life sciences &amp; Earth sciences (<strong>IJLE</strong>) are available under Creative Commons Attribution Non-Commercial No Derivatives Licence (<a href="" target="_blank" rel="noopener">CC BY-NC-ND 4.0</a>). Authors retain copyright in their work and grant <strong>IJLE&nbsp;</strong>right of first publication under CC BY-NC-ND 4.0. Users have the right to read, download, copy, distribute, print, search, or link to the full texts of articles in this journal, and to use them for any other lawful purpose.</p> <p>Articles published in <strong>IJLE&nbsp;</strong>can be copied, communicated and shared in their published form for non-commercial purposes provided full attribution is given to the author and the journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (<em>e.g., post it to an institutional repository or publish it in a book</em>), with an acknowledgment of its initial publication in this journal.</p> Transesterification of vegetable oil of higuerilla (ricinuscommunis l) for biofuel generation and cost determination <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> Telly Yarita Macías Zambrano Tanya Beatriz Bravo Mero Verónica Dolores Palma Mendoz Rosa Delfina Giler Giler ##submission.copyrightStatement## 2019-09-09 2019-09-09 3 1 1 7 10.31295/ijle.v3n1.96