“…However, inappropriate drying methods can lead to nutrition loss and microbial proliferation, ultimately lowering the raisin quality (Olivati et al, 2019) Hence, emerging novel food processing methods have aroused the attention of researchers. The methods involve incorporating techniques such as pressure, ultrasound, vacuum, microwave (Peña-Gonzalez et al, 2019;Shabbir et al, 2019), freeze and microwave (Li et al, 2020), high humidity and hot air (Bai et al, 2013), pulsed electric field (Nowacka et al, 2019), vibrating fluid (Meili et al, 2020), convective and microwave (Izli & Polat, 2019), and radio frequency-vacuum (Zhou et al, 2018) into the drying process. These novel drying techniques are designed to achieve cost-effectiveness, operational simplicity, and energy efficiency.…”