Effect of microwave drying technology mode to the changes of β-carotene and lycopene in the aril of Gac (Momordica cochinchinensis Spreng) ☆

Initial evaluation of the microwave drying (MWD) applicability for Gac aril shows that the specific power ratio (SPR), drying time, air speed affect to the changes of lycopene of gac aril but they do not affect to the changes of β-carotene clearly. The MWD technology mode:3,25 W/g of SPR, 50 minutes of drying time, 1,1 m/s of air speed affect is suitable to gac aril; the content obtained by MWD of β-carotene and lycopene is corresponding to 5,2±1,2 and 163,7±24,6 mg.g-1 which is distinctively better than thermal convection drying (4.7±2.1 and 82.5±12.9 mg.g-1) but worse than Freeze-drying (7,2±1,3 and 189.6±25.3 mg.g-1).