食品科学2011，Vol.32Issue(16)：108-112,5.
不同干燥方式对甘薯产品品质的影响
Effect of Different Drying Methods on Quality of Sweet Potato Products
摘要
Abstract
The effects of 5 drying methods including hot air drying,vacuum microwave drying,extrusion drying with variable temperature and pressure difference,vacuum freeze drying and vacuum drying on physical properties,nutritional composition and microstructure of sweet potato products were investigated.Hot air drying resulted in the largest harness followed by extrusion drying with variable temperature and pressure difference,vacuum microwave drying,vacuum drying and vacuum freeze drying.Hot air-dried sweet potato products exhibited the largest ΔE＊ followed by those dried by vacuum drying,extrusion drying with variable temperature and pressure difference,vacuum microwave drying and vacuum freeze drying.Sweet potato products showed no remarkable change in their crude protein or crude fiber contents before and after drying.All of the five drying methods could result in a decrease in the crude starch content and an increase in the reducing sugar content of sweet potato products,and moreover,β-carotene and VC contents were both substantially decreased.After vacuum freeze drying and extrusion drying with variable temperature and pressure difference,the excellent honeycomb structure of sweet potato products was observed with evenly widened intercellular spaces.Hot air dried and vacuum dried sweet potato products displayed a compact structure.The structure of vacuum microwave dried sweet potato products was very compact.The results collectively indicate that extrusion drying with variable temperature and pressure difference can result in both better product quality and lower production cost and is therefore suitable for industrial-scale production of dried sweet potato products.关键词
甘薯/干燥方法/理化性质/品质特性Key words
sweet potato/drying method/physicochemical properties/quality characteristics分类
轻工纺织引用本文复制引用
丁媛媛,毕金峰,木泰华,于静静,赖必辉..不同干燥方式对甘薯产品品质的影响[J].食品科学,2011,32(16):108-112,5.基金项目
公益性行业（农业）科研专项 （）
国家现代农业产业技术体系建设专项 （）
科技部农业科技成果转化资金项目 （）
