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食品研究与开发:2019,40(4):14-19
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黄花菜热风干燥动力学与维生素C降解动力学研究
(1.湖南农业大学食品科技学院,湖南长沙410128;2.湖南省农产品加工研究所,湖南长沙410125;3.中国科学院理化技术研究所,北京100190)
Drying and Vitamin C Degradation Kinetics in Daylily Flower Buds(Hemerocallis citrina)during Hot Air Drying Process
(1.College of Food Science and Technology,Hunan Agricultural University,Changsha 410128,Hunan,China;2.Hunan Agricultural Product Processing Institute,Changsha 410125,Hunan ,China;3.Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing100190,China)
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投稿时间:2018-08-18    
中文摘要: 该文研究热风干燥温度(50、60、70℃和80℃)对黄花菜干燥动力学(水分比、干燥速率、有效扩散系数、活化能)和维生素C降解动力学的影响。结果表明,黄花菜的干燥以降速阶段为主,随干燥温度的升高干燥时间显著缩短,水分有效扩散系数(Def)f显著升高。水分扩散活化能(E)a与水分含量(M)呈指数关系:Ea=37.886 85exp(-M/1.739 28)+25.272 19。黄花菜干燥过程中维生素C降解呈Weibull模型,R2>0.99,其降解的活化能(E)a为72.25 kJ/mol。
Abstract:Abstract:Drying kinetics (including moisture ration,drying rate,effective diffusivity and activation energy)and VCdegradation kinetics in daylily flower buds were investigated during hot air drying(50,60,70℃,and 80℃).Results showed that increasing drying temperature caused shorter drying times and higher moisture effective diffusivity(Deff),and falling rate periods played a predominant role.The relationship between Eaand water content(M)is exponential,Ea=37.886 85exp(-M/1.739 28)+25.272 19.The degradation of VCshowed Weibull model,R2 >0.99,and the activation energy(Ea)of the degradation was 72.25 kJ/mol.
文章编号:201904003     中图分类号:    文献标志码:
基金项目:基金项目:国家自然科学基金项目(31601525);国家重点研发计划(2017YFD0400902-2);湖南省重点研发计划(2017NK2112);湖南省教育厅优秀青年项目(16B123);国家自然科学基金项目(31601551)
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