Abstract
Application of the Peleg model was investigated for predicting water absorption by five winter- and five spring-planted chickpea genotypes during soaking between temperature ( T ) of 20 and 100 °C. The Peleg model can predict kinetics of the chickpea soaking till equilibrium using short-term data at the given conditions. Its specific form for infinite time may also be used to estimate equilibrium moisture content ( M e) at T⩾40 ° C. Spring and winter chickpeas showed no significant difference ( P<0.05) in the Peleg rate constant ( K 1) and Peleg capacity constant ( K 2) within and between the groups at all temperatures except for K 1 at T<40 ° C . The discrepancy for K 1 was attributed to characteristic water permeabilities of spring and winter chickpeas which were prominent at T<40 ° C . The Peleg constant K 1 decreased from 17.1×10 −3 to 0.95×10 −3 h % −1 for the spring chickpeas, and from 22.2×10 −3 to 1.02×10 −3 h % −1 for the winter chickpeas with increasing temperature from 20 to 100 °C. An Arrhenius plot for K 1 exhibited a slope change around 55 °C corresponding to approximate gelatinization temperature of the chickpea samples. The Peleg constant K 2 for the samples linearly increased from 7.26×10 −3 to 9.48×10 −3 % −1 with increasing temperature from 20 to 100 °C.
Published Version
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