Caracterización de tejido vegetal de frutos de plátano mediante las técnicas de impedancia eléctrica y análisis bromatológico
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Alzate Loaiza, José Jesús | 2014-08-05
The department of Quindío annually provides more than 300,000 tons of bananas in domestic production, constituting 15% of the local economy. In this work, the effect of ionic mobility on the ripening process in fruit and banana has been studied. For this study, were necessary to take samples which were harvested and prepared for taking electrical impedance measurements at room temperature and air atmosphere as a function of time. Impedance measurements were done over samples at time intervals of a day, enough time to minimize stress due to the presence of the electrodes. Compositional and colorimetric analysis was made in the samples and breath samples were placed in a drying chamber in air atmosphere to show the process of maturation at the time to rich CO2 in the atmosphere. Experimental evidence shows that during the banana ripening process occurring ionic substances whose concentration varies with time; Nyquist Diagrams were constructed from impedance measurements, it shows that the electrical resistance changes systematically with time due to the ethylene concentration (C2H4), carbon dioxide and soluble solids (degrees Brix) change, thus it is the evidence restricted oxygen levels in the chamber, caused by the natural process of breathing that rarefied atmosphere with CO2, inhibiting ethylene production and delaying maturation up to four weeks. Experimental data shows that the aging time is inversely proportional to the electrical resistance. This provides a technique for evaluating the state of bananas´ maturity by measuring the electrical resistance.
LEER