(2013) Rehydration properties of precooked whole beans (Phaseolusvulgaris) dehydrated at room temperature, CyTA -Journal of Food, 11:1, 94-99, DOI: 10.1080/19476337.2012 To link to this article: https://doi.org/10. 1080/19476337.2012 The aim of this research was to study the rehydration behavior of precooked whole beans (Phaseolus vulgaris) dehydrated at room temperature (258C) and soaked in water at three temperatures (40, 60, and 808C). The water absorption of the beans was determined by the gain in weight. The dehydration kinetic at room temperature of the beans was adequately described by the Logarithmic model (R 2 ¼ 0.9989) with a dehydration rate constant (k d ) value of 1.96 6 10 73 min 71 . A semi-empirical first-order differential equation adequately described the rehydration characteristics of precooked whole bean under the experimental conditions (R 2 ¼ 0.9934-0.9976). The rehydration rate constant (k r ) increased from 6.10 6 10 72 to 12.14 6 10 72 min 71 with an increase in the temperature from 40 to 808C. The temperature dependence of k r was well described by Arrhenius-type equation (R 2 ¼ 0.8785), with estimated activation energy of 16.03 kJ mol 71 K 71.Keywords: precooked whole bean; water absorption; rehydration kinetic; dehydration kinetic El propo´sito de este trabajo fue estudiar el comportamiento de rehidratacio´n de frijol (Phaseolus vulgaris) entero precocido deshidratado a temperatura ambiente (258C) y remojado en agua a tres temperaturas (40, 60 y 808C). La absorcio´n de agua del frijol se determino´por la ganancia de peso. La cine´tica de deshidratacio´n a temperatura ambiente del frijol fue descrita adecuadamente por el modelo Logarı´tmico (R 2 ¼ 0,9986) con un valor de la constante de velocidad de deshidratacio´n (k d ) de 1,96 6 10 73 min 71 . Una ecuacio´n diferencial empı´rica de primer orden describio´adecuadamente las caracterı´sticas de rehidratacio´n del frijol entero precocido bajo las condiciones experimentales (R 2 ¼ 0,9933 a 0,9976). La constante de velocidad de rehidratacio´n (k r ) se incremento´de 6,10 6 10 72 a 12,14 6 10 72 con el aumento de temperatura de 40 a 808C. La dependencia de temperatura de k r fue descrita por la ecuacio´n de Arrhenius (R 2 ¼ 0,8785), con una energı´a de activacio´n estimada de 16,03 kJ mol 71 K
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