摘要
研究热风——真空联合干燥对银耳品质的影响。以银耳收缩率、复水比、色泽、多糖含量以及微观结构等指标评价联合干燥效果,并与单独的热风干燥和单独的真空干燥进行对比,分析联合干燥的成本优势。结果表明,不同联合干燥条件热风60℃——真空50℃、热风60℃——真空60℃、热风60℃——真空70℃干燥效果均较好,干制后的银耳收缩率不低于60%,复水比可达12以上,多糖含量22%以上,并具有良好的微观组织结构,相比单一的真空干燥和冷冻干燥,联合干燥成本分别降低19%和51%。热风——真空联合干燥作为一种高品质、低能耗的干燥方式值得推广。
The effects of combined hot-air and vacuum drying on quality of dehydrated Tremella fuciformis were studied.The dehydrated Tremella fuciformis shrinkage rate,rehydration ratio,color,polysaccharide content and microstructure were studied and compared with those of single hot-air drying（AD） and vacuum drying（VD）.The cost of combined hot-air and vacuum drying was analyzed.When the temperatures of three combined drying levels are 60℃（AD） and 50℃（VD）,60℃（AD） and 60℃（VD）,60℃（AD） and 70℃（VD）,dehydrated Tremella fuciformis shrinkage rate was not below 60%,rehydration ratio was more than 12,polysaccharide content was more than 22% and microstructure was good.The cost of combined hot-air and vacuum drying was lowered by 19% and 51%,respectively,compared with those of single vacuum drying and freezing drying.The results showed combined hot-air and vacuum drying could be generalized as a high quality and low energy drying method.
出处
《核农学报》
CAS
CSCD
北大核心
2013年第6期805-810,共6页
Journal of Nuclear Agricultural Sciences
基金
浙江省重大科技专项(2009C12036)
关键词
银耳
热风真空联合干燥
品质变化
微观结构
Tremella Fuciformis
Combined Hot-air and Vacuum Drying
Quality Change
Microstructure
