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Variaciones del contenido de humedad por efecto de congelado a temperaturas de criogenia

Authors: L.L. Méndez- Lagunas; J. Rodríguez-Ramírez; M. Y. García-Cortes;

Variaciones del contenido de humedad por efecto de congelado a temperaturas de criogenia

Abstract

"Las variaciones de contenido de humedad por efecto del congelamiento a temperaturas de criogenia fueron evaluadas en el transcurso de una cinética de secado de ajo. Las condiciones de secado fueron temperaturas constantes de 40°C, 50°C y 60°C con un flujo de aire de 1.8 m/s. Las muestras frescas, secas y en el transcurso de secado fueron congeladas con nitrógeno líquido antes de la determinación de contenido de humedad. Como referencia, muestras no congeladas fueron monitoreadas al mismo tiempo. Durante las cinéticas de secado, las muestras sometidas a congelamiento por criogenia varían entre 0 y 70% en su contenido de humedad en relación a las no tratadas con criogenia. Estos valores contrastan con los encontrados en muestras completamente secas o totalmente frescas que fue de 0.55 y 1.17 % respectivamente. Los resultados sugieren que los diversos fenómenos que ocurren durante el congelamiento a temperaturas de criogenia, dependen principalmente del contenido de humedad del material antes de someterse a este proceso. Estas variaciones son muy importantes si se realizan correcciones de la humedad base seca de determinaciones fisicoquímicas en el transcurso de procesos de conservación (ej. secado) pero afectan poco cuando estas correcciones se efectúan en determinaciones sobre muestras frescas o totalmente secas."

Keywords

contenido de humedad, Ingeniería, Determinaciones fisicoquímicas, criogenia

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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