Ortega, FabiánSoto, MaryorisHernández, Danilo2020-12-122020-12-122020-12-10https://repositorio.unicordoba.edu.co/handle/ucordoba/3803The aim of this work was to determine the influence of drying temperature on humidity and color in “criollo” yam (Dioscorea alata) by the refractive window technique. The “criollo” yams were selected from the public market of the municipality of Ciénaga de Oro (Córdoba) according to their variety, size, weight, uniform thickness, absence of physical and biological damage. Then the yam was washed, disinfected, rinsed and peeled. A completely randomized design was used with three levels of the Temperature factor: {70, 80, 90} °C and three replications. The samples were suitable in the form of sheets with dimensions of 3.5 cm long x 3.5 cm wide and 3.5 mm thick. The samples were placed to dry in a refractive window dryer at a drying temperature of 70, 80 and 90 °C. The color was measured using the Color Flex EZ colorimeter and the humidity was measured by the oven method at 105°C; subsequently, the color change (ΔE*) was calculated, the effective moisture diffusivity was determined using the mathematical model of Fick's second law and the activation energy was estimated using the Arrhenius model. It was found that in the refractive window drying, the temperatures had a significant difference (p<0.05) on the humidity, the effective diffusivity observing that as the temperature increases, also increases the humidity loss, while for the parameters L *, a *, b * and ΔE * the values were not significantly different (p <0.05). The effective diffusivity of had values between 2.83x10-8 and 6.05x10-8 m2 /s, the activation energy (Ea) was 39.6 kJ/mol. Finally, it was observed that refractive window drying preserves the color compared to hot air drying1. INTRODUCCIÓN............................................................................................... 142. REVISIÓN DE LITERATURA ........................................................................................................162.1 EL ÑAME (Dioscorea)............................................................................................ 162.1.1 Generalidades del ñame ..................................................................................... 162.1.2 Producción y usos del ñame .......................................................................................... 162.2 SECADO.................................................................. 192.2.1 Generalidades del secado.................................................................................. 192.2.2 Secado por ventana refractiva................................................ 202.3 MODELO MATEMÁTICO DE TRANSFERENCIA DE MASA PARA EL PROCESO DE SECADO ......................................232.4 COLOR....................................................... 253. MATERIALES Y MÉTODOS.................................................. 273.1 Tipo de investigación................................................273.2 Localización.......................................... 273.3 Universo de estudio.................................... 273.4 Variables................................... 273.4.1 Variables Independientes............................................ 273.4.2 Variables Dependientes...................................... 273.5 Evaluación del efecto de la temperatura en la pérdida de humedad del ñame criollo en el proceso de secado por Ventana refractiva...................................... 273.5.1 Cinética de secado................................................... 283.6 Determinación de los parámetros del modelo de transferencia de masa del secado por ventana refractiva..................... 293.7 Evaluación del cambio de color del ñame criollo por el proceso de secado por ventana refractiva.................................................... 293.8 Diseño experimental y análisis estadístico ........................................................294. RESULTADO Y DISCUSIÓN.................................................... 304.1 Cinética de secado............................................... 304.2 Determinación de los parámetros del modelo de transferencia de masa del secado por ventana refractiva..................................314.3 Evaluación del cambio de color del ñame criollo por el proceso de secado por ventana refractiva............................................. 335. CONCLUSIONES............................................. 346. RECOMENDACIONES................................................ 357. BIBLIOGRAFÍAS.............................................. 368. ANEXOS............................................... 40application/pdfspaCopyright Universidad de Córdoba, 2020Trabajo de grado - Pregradoinfo:eu-repo/semantics/openAccessAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)ColorSecado por ventana refractivaEnergía de activaciónÑameColorRefractive window dryingActivation energyYam