was dependent on the power level, being the highest at
115 W and lowest at 285 W. Mushroom having 92% initial
moisture content dried to a final moisture content of 6%
within 45 and 20 min at microwave power level of 115
and 285 W, respectively, at pressure level of 15 kPa. By
comparison, similar mushroom samples under convective
hot-air drying took 270 and 180 min at drying air temperature
50 and 70 C, respectively. Thus, the microwavevacuum
drying times were around 90% shorter at 285 W
and 75% shorter at 115 W than the corresponding convective
air drying times.