Fig. 2. Moisture ratio (MR) (a), drying rates during HACD (b), MWVD and HACD + MWVD (c), and material temperature changes during MWVD and HACD drying of frozen/
thawed blueberries (d) (mean ± SE, n = 3). MWVD – microwave vacuum drying; HACD – hot air convective drying; HACD + MWVD – hot air convective and microwave
vacuum drying.