Now showing items 40466-40485 of 69223

    • Kinetic aspects of a dried thin layer carrot in a heat pump dryer 

      Gómez-Daza, Juan Carlos; Ochoa-Martínez, Claudia Isabel
      This article presents a mathematical model for drying thin layer carrot slices (Daucus carota) using a heat pump dryer (HPD). To select the equation that best describes the drying curve, 10 semi-theoretical and/or empirical ...
      Universidad Nacional de Colombia Revistas electrónicas UN Dyna. 
    • Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system 

      Balladares, Eduardo; Parra, Roberto; Sánchez, Mario
      The fixation of arsenic contained in gases produced during pyrometallurgical processes by using solid ferric oxide was studied in the range 873-1073 K under different oxygen potential and solid aggregates porosities. Arsenic ...
      Universidad Nacional de Colombia Revistas electrónicas UN Dyna. 
    • Kinetic mechanism for the cracking of Colombian heavy crude oil in refinery equipments 

      López Pérez, Luis Carlos
      We present a methodology for developing lump-mechanisms for the main three refinery processes with heavy crude oil fractions. Hydrocracking, Fluid Catalytic Cracking and Delayed Coking. Given the available resources, ...
      Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos. 
    • Kinetic modelling of drying of three varieties of yucca industrial 

      Torregroza Espinosa, Angelica María; Montes Montes, Everaldo Joaquín; Ávila Gómez, Adrián Enrique; Remolina López, John Fredy
      Drying of three varieties of cassava, was conducted in a tunnel type dryer; the effect of temperature, variety and velocity of drying air on the drying time, using a completely randomized design in factorial arrangement ...
      Universidad Nacional de Colombia Revistas electrónicas UN Dyna. 
    • Kinetic of biogas production from oil palm empty fruit bunches 

      Carrillo-Nieves, Danay; Zumalacárregui-de-Cárdenas, Lourdes; Franco-Rico, Rafael; Sarvari-Horvath, Ilona
      The production process of oil from Elaeis guineensis palm produces an organic residual. Oil palm empty fruit bunches (OPEFB) are one of the main waste products, representing 7%. Up to now, OPEFB aren't totally used, being ...
      Universidad Nacional de Colombia Revistas electrónicas UN Dyna. 
    • Kinetic Study and Phenomenological Modeling of a Biomass Particle during Fast Pyrolysis Process 

      Montoya Arbeláez, Jorge Iván
      In this project, the main physical and chemical phenomena associated with the pyrolysis of sugarcane bagasse were studied develop a new particle-level model that predicts the evolution of major compounds during the pyrolysis ...
      Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos Ingeniería Química. 
    • Kinetic study of palmitic acid esterification catalyzed by rhizopus oryzae resting cells 

      Méndez, Jonh J.; Ramon, Canela; Torres, Mercè
      ABSTRACT In the present study, a kinetic model for the biocatalytic synthesis of esters using Rhizopus oryzae resting cells is proposed. The kinetic study has been made in a range of 30-50 °C and atmospheric pressure. The ...
      Universidad Nacional de Colombia Revistas electrónicas UN Acta Biológica Colombiana. 
    • Kinetic study of toluene partial oxidation to benzaldehyde, using a Ce – Zr – Mo mixed oxide as catalyst 

      Díaz Chaparro, Geraldine
      Abstract. The kinetic study of Ce-Zr-Mo catalysts on toluene partial oxidation to benzaldehyde in vapor phase is presented in this work. Three different families of mixed oxides prepared by pseudo sol gel method were ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Química y Ambiental Ingeniería Química. 
    • Kinetic wealth-exchange model of economic growth 

      Quevedo Vega, David Santiago
      En esta tesis se propone un modelo cinético de intercambio de riqueza con crecimiento económico (KWEMEG) en el que se explora el efecto del ahorro de la producción, los im- puestos con beneficio tributario y la aversión ...
    • Kinetics of alcoholic fermentation using guava (psidium guajava) seed flour and dry mycelium of aspergillus niger as nitrogen sources 

      Serna Cock, Liliana; Mera Ayala, José Daniel; Angulo López, Jorge Eduardo; Gómez Schouben, Ana Lucía
      The kinetics of alcoholic fermentation was evaluated using the following substrates: molasses, urea, and diamine phosphate (MUDP); molasses and guava seed flour (MGSF); and molasses and dry mycelium of Aspergillus niger ...
      Universidad Nacional de Colombia Revistas electrónicas UN Dyna. 
    • Kinosternon scorpioides scorpioides (Testudines: Kinosternidae): nuevo reporte en el nororiente de Colombia 

      Cáceres-Martínez, Carlos Herney; Acevedo Rincón, Aldemar Alberto; Sierra Leal, José Antonio; González Maya, José Fernando
      Presentamos un nuevo reporte de la tortuga escorpión Kinosternon scorpioides scorpioides para el departamento de Norte de Santander, Colombia. Este espécimen fue colectado en el bosque seco tropical del departamento, el ...
      Universidad Nacional de Colombia Revistas electrónicas UN Acta Biológica Colombiana. 
    • Kintsugi-pedagogias del transitar reflejos y refracciones 

      Niño Vergara, Magda Paola
      Este texto nace de la necesidad de reflexionar acerca de las prácticas violentas que han enmarcado la formación en Artes Escénicas en Bogotá. A la vez deseo registrar la forma en que a lo largo de mi carrera como docente ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Artes. 
    • Kipará 

      Ulloa, Astrid
      Material didáctico EMBERA
      Universidad Nacional de Colombia Editorial UN. 
    • Kit didáctico sobre algunas aves de Bogotá y sus funciones ecológicas 

      Forero Cárdenas, Luz Elena
      La innovación educativa “SUE, volando por Bogotá conoceremos las funciones ecológicas de las aves en nuestra ciudad” ha sido desarrollada con el fin de resolver diversas necesidades al enseñar ecología en grado séptimo, ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ciencias. 
    • Klaus meschkat y josé maría rojas, compiladores. liquidando el pasado. la izquierda colombiana en los archivos de la unión soviética 

      Archila Neira, Mauricio
      El voluminoso libro que compilan Klaus Meschkat y José María Rojas cubre más de 170 documentos sobre las relaciones de la izquierda colombiana con la Internacional Comunista entre 1927 y 1933, seleccionados de los archivos ...
      Universidad Nacional de Colombia Revistas electrónicas UN Anuario Colombiano de Historia Social y de la Cultura. 
    • Knaster's type continua and its geometric models 

      Camargo, Javier; Isaacs, Rafael
      A Knaster's type continuum is a continuum homeomorphic to an inverse limit of arcs with open, non-homeomorphic bounding maps. In this paper, we present geometric models of Knaster's type continua with exactly one bounding map.
      Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Matemáticas. 
    • Knauss, Stefan. Von der Conquista zur Responsibility while Protecting. Die Debatte zur humanitär gerechtfertigten Kriegsführung aus lateinamerikanischer Perspektive. 

      Arrese Igor, Héctor Óscar
      Knauss, Stefan. Von der Conquista zur Responsibility while Protecting. Die Debatte zur humanitär gerechtfertigten Kriegsführung aus lateinamerikanischer Perspektive. Frankfurt am Main: Peter Lang Edition, 2016. 274 pp.
      Universidad Nacional de Colombia Revistas electrónicas UN Ideas y Valores. 
    • Knowledge and attitudes on hiv transmission in students from a medical school in perú 

      Sanabria Rojas, Hernán
      A study was carried out in order to determine knowledge and attitudes regarding the transmission of the human immune deficiency virus HIV- among fourth year medical students that were on the epidemiology course at the ...
      Universidad Nacional de Colombia Revistas electrónicas UN Revista de Salud Pública. 
    • Knowledge base for efl/esl educators: what does it mean? 

      Pineda B., Clelia
      Searching for an appropriate definition of what constitutes knowledge base in the teaching profession has become a central focus of attention for researchers, educators, and accreditation agencies during the last decades. ...
      Universidad Nacional de Colombia Revistas electrónicas UN PROFILE Issues in Teachers' Professional Development. 
    • Knowledge creation and mentoring: case Suyusama – the society of Jesus sustainability programme for Andean Nariño and Putumayo in southern Colombia 

      Frías Navarro, Rosalba
      The objective of this research is to find out how mentoring can enhance or inhibit the regional knowledge creation process in the context of Suyusama , a regional sustainability program that cooperates with local communities ...