文章基本信息

标题：Sorption and thermal properties of rice, potato starch, and oat flakes
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作者：Landfeld A. ; Houška M. ; Hoke K. 等
期刊名称：Czech Journal of Food Sciences
印刷版ISSN：1212-1800
电子版ISSN：1805-9317
出版年度：2008
卷号：26
期号：6
页码：413-420
DOI：10.17221/1363-CJFS
出版社：Czech Academy of Agricultural Sciences
摘要：A precise design of the equipment for thermal sterilisation of rice, potato starch, and oat flakes by dry heat requires the knowledge of the relevant values of physical properties of these products. Water activity and enthalpy are presented as functions of temperature and humidity. Water activity was measured as a function of the moisture content and temperature in the desorption process that reproduces the real conditions existing during dry heat processing in the pilot rotating steriliser equipment. The heat of evaporation can be predicted from these data as a function of the moisture content of these products. DSC (differential scanning calorimetry) method was used for measuring the enthalpy of these products as a function of temperature during desorption of moist products starting from various levels of the moisture content. The total energy Ec necessary for heating the product and evaporation of the given amount of water can be calculated.
关键词：moisture content; humidity; water activity; enthalpy; evaporation; heat; bound water