• Alkaline pre-treatment and hydrolysis with acid cellulase of the rice husk (Oryza sativa) for production of bioethanol 

      Cacua Silva, Alejandra; Rodriguez Ordonez, Dora Cecilia; Parra LLanos, John Wilmer (Journal of Physics: Conference SeriesLondres, Reino Unido, 2019-11-19)
      Several companies generate large amounts of agroindustrial waste, which could be used as raw material for the production of bioethanol; among them, those that process and commercialize rice, which produce a large amount ...
    • Analysis of caffeine in energy drinks by Ultra-Fast Liquid Chromatography 

      RodrÍguez Ordoñez, Dora Cecilia; Medina Mojica, Ingrid Yurley; Parra LLanos, John Wilmer (Journal of Physics: Conference Series, 2020-08-05)
      The objective of this work was to standardize the method of analysis of caffeine and determine its content in three energy drinks (Vive 100, Peak and Red Bull) consumed in the Colombian market, which were selected based ...
    • Analysis of folic acid in white rice by ultra-fast liquid chromatography 

      Rodriguez Ordonez, Dora Cecilia; Torres Herrera, Laura Natalia; Parra LLanos, John Wilmer (Journal of Physics: Conference SeriesLondres, Reino Unido, 2019-11-19)
      The method of analysis was standardized, and the folic acid content was determined in samples of fortified white rice (Z, G and D) and unfortified (E and O). The analysis was performed in triplicate in samples of 2.0000 ...
    • Mathematical model for production sequencing in a manufacturing company 

      Parra LLanos, John Wilmer; Caicedo-Rolón, Alvaro Jr; Rivera Cadavid, Leonardo (Journal of Physics: Conference SeriesLondres, Reino Unido, 2019-11-19)
      The objective of the research was to determine the optimal sequence of production of n jobs in m operations, in a small footwear manufacturing company with characteristics of a flow shop machine environment, which minimizes ...
    • OBTENCIÓN DE PASTA CELULÓSICA A PARTIR DE LA PODA GENERADA DE LOS CULTIVOS DE PALMA DE ACEITE (Elaeis guineensis) DE LA REGIÓN DEL CATATUMBO. 

      RodrÍguez Ordoñez, Dora Cecilia; Parra LLanos, John Wilmer; López Domínguez, Manuel José (Universidad Francisco de Paula SantanderCúcuta, Norte de Santander, 2020-02-02)
      El papel, al igual que otros derivados de la pasta de celulosa, como el cartón, son materiales con una infinidad de usos. Con el desarrollo de la tecnología y el uso de los computadores se pensaba que el papel desaparecería, ...
    • Phenomenological modeling and simulation of a textile stenter 

      Parra LLanos, John Wilmer; Santos, Rossane; Bastos Quadri, Marintho; Martins, Ianto Oliveira (Textile Research JournalWashintong D.C , Estados Unidos, 2020-04-28)
      Mathematical modeling and simulation of cotton fabric drying in a stenter machine was performed using a finite element method. A standard κ-ɛ turbulence model was coupled with heat/mass transfer in porous media models. A ...
    • Production of bioethanol from rice husk pretreated with alkalis and hydrolyzed with acid cellulase at pilot scale 

      Cacua Silva, Alejandra; Rodriguez Ordonez, Dora Cecilia; Parra LLanos, John Wilmer (Journal of Physics: Conference Series, 2018-12-07)
      Rice husk (RH) is the main biomass byproduct of the rice industry, so much that it corresponds to 20% of the total cereal production and is generally considered a waste. Due to its content of cellulose and hemicellulose, ...
    • Production sequencing in a flow shop system using optimization and heuristic algorithms 

      Caicedo-Rolón, Alvaro Jr; Parra LLanos, John Wilmer (Gestao e ProducaoBrasilia,Brasil, 2021-03-31)
      The purpose of the research was to determine the sequencing of the production of n jobs in m operations in a small footwear company in an environment of flow shop machine characteristics, which optimizes the total time ...