After vacuum impregnation, three drying techniques were performed; freeze drying (FD), convective hot air drying (AD) and microwave vacuum drying (MVD). For all drying procedures, 6 apple slices of each apple (n ¼ 8) were pre-treated by VI and dried.
After vacuum impregnation, three drying techniques wereperformed; freeze drying (FD), convective hot air drying (AD) andmicrowave vacuum drying (MVD). For all drying procedures, 6apple slices of each apple (n ¼ 8) were pre-treated by VI and dried.