Dielectric properties of thermosonically treated Agaricus bisporus slices during microwave vacuum drying and correlation with the water state
文献类型： 外文期刊
作者： Jiang, Ning 1 ; Lagnika, Camel 1 ; Liu, Chunquan 1 ; Li, Dajing 1 ; Yu, Zhifang 2 ; Wang, Libin 2 ; Zhang, Zhongyuan 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Farm Prod Proc, Nanjing, Peoples R China
2.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing, Peoples R China
3.Jiangnan Univ, State Key Lab Food Sci & Technol, Wuxi, Jiangsu, Peoples R China
关键词： Agaricus bisporus; thermosonic pretreatment; microwave vacuum drying; dielectric properties; water state
期刊名称：DRYING TECHNOLOGY （ 影响因子：4.452； 五年影响因子：4.034 ）
ISSN： 0737-3937
年卷期： 2020 年 38 卷 4 期
页码：
收录情况： SCI
摘要： The dielectric properties of thermosonically treated Agaricus bisporus slices during microwave vacuum drying were determined, by using a network analyzer and an open-ended coaxial-line probe at microwave frequency (915 and 2450 MHz). The permittivity at 25 degrees C was also correlated to the water state determined by low field nuclear magnetic resonance (LF-NMR) analysis. Results showed that the dielectric constant epsilon' and loss factor epsilon '' of A. bisporus slices were affected significantly by the composition of water state in the sample. Thermosonic pretreatment enhanced the influence of semi-bound water (M-22) and bound water (M-21) on the permittivities in sample slices during microwave vacuum drying (MVD). The dependency of permittivities on the moisture content and temperature at 915 and 2450 MHz for thermosonically treated A. bisporus samples could be described by third-degree polynomial models, with R-2 higher than 0.998. Infrared thermal imaging analysis confirmed that thermosonic pretreatment is a potential technology to promote the uniformity of A. bisporus slices during the MVD process.
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