Análisis digital de imágenes para evaluar el encogimiento de fresas sometidas a tecnologías emergentes de procesamiento
Vol. 5 Núm. 2 (2018), Investigación Agroindustrial
Vol. 5 Núm. 2 (2018)

Análisis digital de imágenes para evaluar el encogimiento de fresas sometidas a tecnologías emergentes de procesamiento

Investigación Agroindustrial
https://doi.org/10.23850/24220582.1594
Publicado 2018-09-03
Juliana Gamboa Santos
Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, CONICET-CIC-UNLP)
Laura Analía Campañone
Universidad Nacional de La Plata (UNLP); CIDCA Centro de Investigación y Desarrollo en Criotecnología de Alimentos
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Palabras clave

images analysis
strawberries
edible coatings
osmotic dehydration
microwave drying Análisis de imágenes
fresas
recubrimientos comestibles
deshidratación osmótica
microondas

Cómo citar

Gamboa Santos, J., & Campañone, L. A. (2018). Análisis digital de imágenes para evaluar el encogimiento de fresas sometidas a tecnologías emergentes de procesamiento. Revista Colombiana De Investigaciones Agroindustriales, 5(2), 33–51. https://doi.org/10.23850/24220582.1594
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Resumen

En las frutas, particularmente en fresas, el aspecto es un atributo de suma importancia. La apariencia, que puede definirse por el color, la forma, el tamaño y la textura visual, no sólo determina el grado de maduración o la presencia o ausencia de impurezas si no también da indicios de la aplicación de procesos tecnológicos o condiciones de almacenamiento prolongado. En la mayor parte de los casos, un encogimiento excesivo de las frutas afecta negativamente la preferencia y aceptación de dichos productos por los consumidores. En el caso de las frutas deshidratadas, las modificaciones morfométricas (forma y tamaño) ocasionadas por el proceso son tema de gran incumbencia para la industria. Las técnicas tradicionales de monitoreo de parámetros físicos y físico-químicos de calidad suelen requerir períodos de análisis prolongados, son costosas, laboriosas, invasivas e impracticables durante el monitoreo en-línea a nivel industrial. Por tanto, el presente trabajo trata sobre la evaluación y correlación de características morfométricas: área (A),  mediante técnicas de análisis digital de imágenes, y espesor (L) medido con un calibre, en rodajas de fresas (1 cm de espesor inicial) sometidas a tratamientos combinados que incluyen aplicación de recubrimientos comestibles (alginato-lactato), deshidratación osmótica (sacarosa, 60 ºBx, 40 ºC, 4h) y secado asistido con microondas (1,2 W/g). Con respecto al espesor se obtuvieron reducciones del orden del 60% (retención 40%) para muestras frescas (FR+MW) y frescas recubiertas (FR_R+MW) y de 37% (retención 63%) para muestras pre-tratadas con DO (DO+MW y DO_R+MW). El procesamiento de imágenes del área de la sección transversal de las rodajas, sometidas a secado con MW, arrojó reducciones de 56% para las muestras FR+MW y FR_R+MW y de hasta el 18% para las muestras previamente deshidratadas osmóticamente. Al correlacionar los porcentajes de retención L y A se obtuvieron excelentes coeficientes para las muestras FR+MW y FR_R+MW (R2: 97 y 98%).

https://doi.org/10.23850/24220582.1594
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