PT  - JOURNAL ARTICLE
AU  - Štencl, Jiří
TI  - Effect of temperature and water activity on heat transfer in parsley leaves in the range of temperatures 10-30 °C
DP  - 2014 Nov 26
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 181--186
VI  - 55
IP  - 5
AID - 10.11118/actaun200755050181
IS  - 12118516
AB  - The equilibrium moisture contents of parsley leaves were measured by the gravimetric dynamic method with continuous recording of changes in sample weight. Consequently water activity values were determined. Henderson equation was found to be a good model both for moisture adsorption and desorption. Isosteric heat of sorption was defined and determined in the temperature range of 10-30 °C. Clausius-Clapeyron equation was used to calculate the isosteric heat of sorption since no dependence on temperature in the analysed range was observed. The isosteric heats of sorption (q<sub>n</sub><sup>st</sup>) were indicated graphic in the form q<sub>n</sub><sup>st</sup> versus moisture content. Values for isosteric heat of sorption ranged from 54.41 to 46.85 kJ/mol.