Bibliographic citations
Ticlia, L., (2024). Vida útil de harina de quinua (Chenopodium quinoa) obtenida por secado convectivo y envasada en polietileno de baja densidad [Universidad Nacional de Trujillo]. https://hdl.handle.net/20.500.14414/22625
Ticlia, L., Vida útil de harina de quinua (Chenopodium quinoa) obtenida por secado convectivo y envasada en polietileno de baja densidad []. PE: Universidad Nacional de Trujillo; 2024. https://hdl.handle.net/20.500.14414/22625
@misc{renati/1044041,
title = "Vida útil de harina de quinua (Chenopodium quinoa) obtenida por secado convectivo y envasada en polietileno de baja densidad",
author = "Ticlia Chamorro, Lucia Olinda",
publisher = "Universidad Nacional de Trujillo",
year = "2024"
}
ABSTRACT The purpose carried out in this research was the estimation of the useful life of quinoa flour (Chenopodium quinoa), Blanca Junín variety. The characteristics of the container were determined according to the permeability of low-density polyethylene (9.15×10-7 kg H2O.m-2.Pa-1.day-1) and the thickness (100μm). Samples of 5 g of this flour, (initial humidity of 13.7% on a wet basis), were placed in 8 glass jars containing saturated salts. The programmed readings for water activity were from 0.1 to 0.9, at temperatures of 20, 25 and 30 °C. The time in which thermodynamic balance (equilibrium humidity) was achieved was 15 days. The model used (GAB) showed an adequate fit to the experimental data, given that the correlation coefficients were greater than 0.95 and the relative mean error (%E) less than 4.7%, reporting 0.0867, 0.0850 and 0.0818 g. of water/g d.b. as values for monolayer for the three temperatures analyzed respectively. The useful life was evaluated in polyethylene bags (low density) and the critical humidity of 15% (0.1765 g H2O/g d.b.), a value taken as a reference from the company Qali Warma (technical sheet), the Heiss model was used and Eichner, under the conditions of the city of Huamachuco, relative humidity of 80%, and at an average temperature of 15°C for 303 days (10 months). In turn, thermodynamic properties such as entropy (𝚫𝚫S), enthalpy (𝚫𝚫H) and Gibbs free energy (𝚫𝚫G) were evaluated. The entropy values (𝚫𝚫S) >0 indicated that the adsorption of the system is unstructured or highly disordered at the molecular level. The Gibbs free energy (𝚫𝚫G), having negative values, shows spontaneous adsorption with a controlled entropic process.
This item is licensed under a Creative Commons License