The aim of this work was to study the occurrence of Lenthionine of Shiitake mushroom at chosen drying conditions with the influence of two different parameters: moisture and temperature of the mushroom.
The results showed that the exponential models used for predicting of moisture and temperature fit reasonably well with the experimental data. The similar pattern of the changes in Lenthionine content was found in all conditions used i.e. 70 oC for 9 h; 40 oC for 6 h and changed to60oCfor6h;10oCstepchangefrom40oCto70oC(3h20mintimeinterval)fortotalof 13 h 20 min. The maximum amount of Lenthionine for each condition was at 9, 6 and 11.67 h, respectively, with less than 13% moisture content (db) of products. Semi-empirical of exponential model developed by Rattanasomboon gave the good prediction for Lenthionine amount only at constant drying temperature. Critical time, a significant parameter, could not be calculated when the drying temperatures were changed during the process. This subsequently resulted in unpredictable Lenthionine content. However, this model could predict the intensity of mushroom flavor when critical times were obtained from the experimental data.