Effect of multi-mode dual-frequency ultrasound pretreatment on the vacuum freeze-drying process and quality attributes of the strawberry slices

• DOI: 10.1016/j.ultsonch.2021.105714
• Publication Date: 2021-08-11T04:20:13Z
• Authors: Baoguo Xu; Jianan Chen; Essodézam Sylvain...; Weiqiang Yan; S.M. Roknul Azam; Jun Yuan; Benxi Wei; Cunshan Zhou; Haile Ma
• Keywords: Vacuum drying

The effects of osmotic pretreatment assisted by ultrasound in different frequency modes before vacuum freeze-drying (VFD) on moisture migration and quality characteristics strawberry slices were investigated. are single-frequency under 20, 40 kHz (SM-20, SM-40), dual-frequency 20/40 including sequential mode (SeDM) simultaneous (SiDM). dried products rehydration, hardness, color, flavor, total anthocyanins, phenols, vitamin C content, active antioxidant components (DPPH -OH) determined. Results showed that drying time the irradiated was reduced 15.25%-50.00%, compared to control samples. Besides, shortened more than ultrasound. SeDM shortest. In addition activity pretreated significantly (p < 0.05) better those other It can be concluded an effective method produce high-quality freeze-dried products.