Affiliation:
1. College of Mechanical and Electronical Engineering, Gansu Agricultural University, Lanzhou 730070, China
Abstract
The present study aimed to investigate the effect of rotary microwave vacuum drying (RMVD), radio frequency vacuum drying (RFVD), vacuum far infrared drying (VFID), vacuum drying (VD), hot air drying (HD) and natural drying (ND) on the drying characteristics, active ingredients and microstructure of Codonopsis pilosulae slices. Compared with the fitting results of the four models, the Weibull model is the most suitable drying model for Codonopsis. The RFVD and HD color difference values were smaller compared to ND. The effective moisture diffusivity (Deff) under different drying methods was between 0.06 × 10−8 m2/s and 3.95 × 10−8 m2/s. RMVD-dried products had the shortest drying time and retained more active ingredients. The microstructure analysis revealed that the porous structure of RMVD is more favorable for water migration. RMVD is a promising dehydration method for obtaining high-value-added dried Codonopsis products.
Funder
Young Mentor Foundation of Gansu Agricultural University
Subject
Plant Science,Health Professions (miscellaneous),Health (social science),Microbiology,Food Science
Reference45 articles.
1. National Pharmacopoeia Commission (2020). Chinese Pharmacopoeia, Volume I, China Pharmaceutical Science and Technology Press.
2. Fu, Y.P., Feng, B., Zhu, Z.K., Xin, F., Chen, S.F., and Li, L.X. (2018). The polysaccharides from Codonopsis pilosula modulates the immunity and intestinal microbiota of cyclophosphamide-treated immunosuppressed mice. Molecules, 23.
3. Thermal diffusivity, moisture diffusivity, and color change of codonopsis javanica with the support of the ultrasound for drying;Nguyen;J. Food Qual.,2019
4. Experimental study and clinical observation of the immunomodulatory effect of Codonopsis black tea;Lei;Nurs. Res.,2022
5. Infrared drying of strawberry;Adak;Food Chem.,2017