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 frequency of publication is two issues per year, i.e. January &amp; July.&nbsp;<br>ISSN 2632-9425</p> SLOAP en-US International journal of life sciences & earth sciences 2632-9425 <p style="text-align: left;">All articles in the SLOAP Journals are published under the terms of the &nbsp;Creative Commons Attribution-ShareAlike 4.0 International License&nbsp;(CC BY-SA) which allows authors and users to copy, distribute, transmit and adapt the article.&nbsp;The &nbsp;Creative Commons Attribution-ShareAlike 4.0 International License&nbsp;of an open-access article, as long as the author is properly attributed.&nbsp;Copyright on any research article published by SLOAP is retained by the author(s).&nbsp;Authors grant to the SLOAP right to publish the article, to be cited as its original publisher in case of reuse, and to distribute it in all forms and media.&nbsp;Copyright and source must be acknowledged and a link must be made to the article's DOI.&nbsp;</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