期刊
ULTRASONICS SONOCHEMISTRY
卷 84, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2022.105963
关键词
Tremella fuciformis; Polysaccharide; Microwave vacuum drying; Ultrasonic; Physicochemical structure; Rheology
资金
- National Natural Science Foundation of China [31401616, 31772039]
- Program of Innovative Research Team in Science and Technology in Fujian Province University
- Science and Technology Innovation Fund Project of Fujian Agriculture and Forestry University [CXZX2020137C]
- [CXZX2020154D]
The study found that adding ultrasonic pretreatments during microwave vacuum drying can accelerate the mass transfer process of Tremella fuciformis, improve the properties and structural characteristics of Tremella fuciformis polysaccharides, and to some extent reduce the molecular weight of the polysaccharides. Additionally, at a specific acoustic energy density, the polysaccharides retained higher sugar content and showed minimal reduction in monosaccharide components.
This study analyzes the effects of ultrasonic waves on the drying kinetics of Tremella fuciformis during microwave vacuum drying. The physicochemical properties and structural characteristics of T. fuciformis polysaccharides (TFPs) were studied by drying tremella samples using hot air drying (HAD), microwave vacuum drying, ultrasonic pretreatments with microwave vacuum drying (US + MVD), and air-borne ultrasonic pretreatments combined with microwave vacuum drying (USMVD) under acoustic energy densities of 0.14, 0.28, and 0.42 W/ mL. The results showed that USMVD and US + MVD accelerated the mass transfer process of T. fuciformis. Compared with HAD treatment, TFP samples obtained by USMVD and US + MVD had a reduced molecular weight to a certain extent, and they had stronger shear thinning ability. In addition, USMVD-TFPs at 0.42 W/mL retained higher total sugar, reducing sugar, and uronic acid, and the degree of reduction in the monosaccharide component content was small.
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