搜索结果: 1-9 共查到“工学 freeze-drying”相关记录9条 . 查询时间(0.092 秒)
Porous frozen material approach to freeze-drying of instant coffee
Freeze-drying desorption drying time initial saturation sublimation
2023/6/19
Porous frozen material with a certain initial porosity was prepared to explore its influence on freeze-drying experimentally. Soluble coffee was selected as the solute in aqueous solution and liquid n...
冷冻干燥中升华界面的临界温度实验（Critical Temperature of Sublimation Interface in Freeze-drying）
冷冻干燥 塌陷温度 冻干显微镜
2010/12/28
利用冻干显微镜（FDM）研究了二元水溶液冷冻干燥过程中升华界面的临界温度，采用差示扫描量热法（DSC）测量了溶液的共晶熔融温度和最大冻结浓缩溶液的玻璃化转变温度。实验结果表明，对于降温时发生共晶的溶液，临界温度为共晶熔融温度，否则将发生融化；对于降温时发生玻璃化转变的溶液，临界温度为塌陷温度，否则将发生塌陷。对于质量分数为5%蔗糖、10%葡萄糖、10%麦芽糖、10%聚乙烯吡咯烷酮（PVP）二元水溶...
微波真空冷冻干燥装置设计与试验（Design and Experiment on Microwave Vacuum Freeze Drying Equipment)
微波 真空冷冻干燥 设计 试验
2010/12/28
阐述了微波真空冷冻干燥装置的总体结构、工作原理以及微波冻干仓的设计要点，详细分析了微波谐振腔、微波真空屏蔽结构和玻璃真空罩的设计，确定了主要工作部件的具体结构和相关参数。冬枣冻干试验研究表明，整机结构合理，性能稳定，安全可靠；与普通真空冷冻干燥相比，在产品质量相同的条件下，干燥时间节省了40.9%，能耗降低55.86%。
Autoxidation and Solvent-Extraction Processes of Linoleic Acid Encapsulated with a Polysaccharide by Freeze-Drying
microcapsule autoxidation solvent-extraction
2009/7/8
Linoleic acid was encapsulated with gum arabic, pullulan or maltodextrin at various weight ratios of the acid to wall materials by freeze-drying, and its autoxidation and solvent-extraction processes ...
基于干燥动力学特性的冷冻干燥过程判别（Judgment of Freeze-drying Process Based on Drying Dynamical Characteristics）
冷冻干燥 干燥动力学特性 升华 解吸 判别
2010/5/5
判断冷冻干燥过程的升华干燥结束点和解吸干燥结束点，对冷冻干燥过程的优化控制有重要意义。以富士苹果为试验材料，在JDG-0.2型真空冻干试验机上进行了冷冻干燥动力学特性试验。采用自制的物料水分在线测量系统，实时测量和绘制苹果块在冷冻干燥过程中的含水率及其变化曲线，根据测量数据分析了物料冷冻干燥动力学特性，提出了升华干燥结束点和解吸干燥结束点的判别方法，便于冷冻干燥过程参数的优化控制。 It is o...
Advances in Transport Phenomena during Freeze-Drying of Food Materials: Fundamentals and Applications
freeze-drying transport phenomena thermal conductivity permeability of water vapor
2009/6/18
Measurement method and values of thermal conductivity and permeability of water vapor were presented for the dried layer of food materials undergoing freeze-drying. Some structural models were develop...
Effect of Relative Humidity during Storage on the Autoxidation of Linoleic Acid Encapsulated with a Polysaccharide by Hot-Air-Drying and Freeze-Drying
autoxidation encapsulation linoleic acid
2009/6/18
Linoleic acid was encapsulated with gum arabic, maltodextrin and pullulan at different weight ratios by hot-air-drying and freeze-drying. The autoxidation processes of the encapsulated linoleic acid w...
Properties of Lactobacillus helveticus CNRZ-32 Attenuated by Spray-Drying, Freeze-Drying, or Freezing
accelerated ripening • attenuated bacterial adjuncts reduced fat cheese Lactobacillus helveticus
2008/3/22
Lactobacillus helveticus CNRZ-32 was attenuated for use in accelerated ripening of Cheddar cheese. The goal was to delay acid production without reducing enzyme activity. Changes in the cellular prope...
Freeze-Drying of Soybean Protein Solution Containing Added Oil: Effects of Freezing Conditions on Drying Rate
freeze-drying supercooling drying rate vapor permeability
2010/11/22
Solutions of soybean protein with and without added oil were freeze-dried, and the measured drying-rate was analyzed using the uniformly retreating ice front (URIF) model to obtain the coefficient of ...