Paloma Patricia Casas Junco, Josué Solís Pacheco, Juan Arturo Ragazzo Sánchez, Blanca Rosa Aguilar Uscanga, Montserrat Calderón Santoyo
El puré de jaca se contaminó artificialmente con esporas de Aspergillus niger para tratarlo con plasma frío (30 W, 1.5 L / min de Helio, en un lapso de 0 a 16 min, posteriormente las muestras se almacenaron a 25 ºC durante 60 días en los que no hubo crecimiento, ni cambios en los sólidos solubles totales, color o aw,sin diferencias significativas en los perfiles aromáticos y tampoco en las muestras no tratadas, en el pH y la acidez total los cambios fueron mínimos. Se logró una reducción de 4 log (UFC / g) en las esporas de Aspergillus niger, coliformes y bacterias mesófilas aerobias después de 8 min de tratamiento a 30 W y 850 V con gas Helio. No se observó alteración en las propiedades sensoriales del puré de jaca tratado. El plasma atmosférico frío es una tecnología no térmica prometedora para su uso en productos de frutas procesadas.
Jackfruit puree was artificially contaminated with Aspergillus niger spores and then treated with cold plasma (30 W, 1.5 L/min Helium, time 0 to 16 min). After treatment, samples were stored at 25 ºC for 60 days, and microbiological and physicochemical parameters were evaluated. A reduction of 4 log (cfu /g) in Aspergillus niger spores was achieved after 8 min treatment at 30 W and 850 V by Helium gas. A. niger, coliforms and mesophilic aerobic bacteria were completely inhibited up to 8 min of treatment and there was no growth during storage. Treated samples did not show changes in total soluble solids, color or aw during storage. Minimal changes were found in pH and total acidity. There were no significant differences in aromatic profiles for treated and untreated samples. Also, the cold plasma treatment did not alter the sensory properties of jackfruit puree. Cold atmospheric plasma is a promising non-thermal technology to be used in processed fruit products.
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