粉末状食品在低水分含量状态下的结构转变
abstract
caking of free-flowing powders during storage is a deleterious phenomenon ubiquitous in the feed, fertilizer, detergent and pharmaceutical industries, and of economical importance to low moisture foods. among other subjects related to caking phenomena, the following aspects are reviewed in this paper: i）morphological changes occurring during caking; ii） proposed mechanisms of caking; iii） quantitative procedures to assess caking; iv） factors affecting caking kinetics; and v） mode of action of anticaking agents. however, the relationship between storage-induced caking processes and the glass transition of amorphous powders is analyzed in more detail.
water relations, glass transition temperatures, structural collapse and microstructural changes of a protein hydrolyzate sample were investigated as a function of sample degree of hydrolysis, storage conditions （temperature and relative humidity） and time. the gordon-taylor equation was a good predictor for the plasticizing effect of water on the glass transition temperature of the powder （tg）. it appeared that the difference △t between the storage temperature （t） and tg was the driving force for structural collapse. volume shrinkage, induced by viscous flow of the matrix and leading to collapse was first noticeable for at > 30°c, corresponding to a water activity> 0.4. the functional dependence between caking kinetics and at was modeled using a williams-landel-ferry （wlf） type relationship. the viscosity of the matrix at the onset of structural collapse was estimated using the wlf equation was 7 log cycles lower than the viscosity of the amorphous solid. scanning electron microscopy studies demonstrated the viscous flow nature of caking by thickening of pore walls and appearance of drop-like and semicrystalline microstructures.
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铸铁潜水搅拌机在水处理与污水处理中的应用
线切割机床割模具有台阶怎么办？
管式电阻炉参数
便携式非甲烷总烃分析仪可应对各种复杂排放工况
聚四氟乙烯的耐热温度？
粉末状食品在低水分含量状态下的结构转变
二氧化碳培养箱的相关介绍
数控车床CAK80285多少钱与80285车床的开环控制有关
手持式激光焊接机-切割焊接清洗一体机
刮屑板-根据客户需要百变的机床零配件
Q684F气动卫生级T型L型三通球阀Q685F的产品特点
生猪车辆洗消中心清洗介绍
phaseII费思图PTG-3500涂层测厚仪应用领域及介绍
华为和德国杜伊斯堡市合作 打造西欧模范智慧城市
PLC-RSC-230UC/ 1AU/SEN/SO46 - 继电器模块 1125984 技术资料
pir保冷管托厂
浅析电伴热技术在隧道消防电伴热中的应用
出去吃饭要留心，某地通报26批次不合格餐饮具！大肠菌群检测仪
换水泵密封及换机械密封的方法
MBR一体化污水处理设备使用说明
caking of free-flowing powders during storage is a deleterious phenomenon ubiquitous in the feed, fertilizer, detergent and pharmaceutical industries, and of economical importance to low moisture foods. among other subjects related to caking phenomena, the following aspects are reviewed in this paper: i）morphological changes occurring during caking; ii） proposed mechanisms of caking; iii） quantitative procedures to assess caking; iv） factors affecting caking kinetics; and v） mode of action of anticaking agents. however, the relationship between storage-induced caking processes and the glass transition of amorphous powders is analyzed in more detail.
water relations, glass transition temperatures, structural collapse and microstructural changes of a protein hydrolyzate sample were investigated as a function of sample degree of hydrolysis, storage conditions （temperature and relative humidity） and time. the gordon-taylor equation was a good predictor for the plasticizing effect of water on the glass transition temperature of the powder （tg）. it appeared that the difference △t between the storage temperature （t） and tg was the driving force for structural collapse. volume shrinkage, induced by viscous flow of the matrix and leading to collapse was first noticeable for at > 30°c, corresponding to a water activity> 0.4. the functional dependence between caking kinetics and at was modeled using a williams-landel-ferry （wlf） type relationship. the viscosity of the matrix at the onset of structural collapse was estimated using the wlf equation was 7 log cycles lower than the viscosity of the amorphous solid. scanning electron microscopy studies demonstrated the viscous flow nature of caking by thickening of pore walls and appearance of drop-like and semicrystalline microstructures.
更多详情，请培安公司：
：北京： 上海： 成都： 广州：
: ：
铸铁潜水搅拌机在水处理与污水处理中的应用
线切割机床割模具有台阶怎么办？
管式电阻炉参数
便携式非甲烷总烃分析仪可应对各种复杂排放工况
聚四氟乙烯的耐热温度？
粉末状食品在低水分含量状态下的结构转变
二氧化碳培养箱的相关介绍
数控车床CAK80285多少钱与80285车床的开环控制有关
手持式激光焊接机-切割焊接清洗一体机
刮屑板-根据客户需要百变的机床零配件
Q684F气动卫生级T型L型三通球阀Q685F的产品特点
生猪车辆洗消中心清洗介绍
phaseII费思图PTG-3500涂层测厚仪应用领域及介绍
华为和德国杜伊斯堡市合作 打造西欧模范智慧城市
PLC-RSC-230UC/ 1AU/SEN/SO46 - 继电器模块 1125984 技术资料
pir保冷管托厂
浅析电伴热技术在隧道消防电伴热中的应用
出去吃饭要留心，某地通报26批次不合格餐饮具！大肠菌群检测仪
换水泵密封及换机械密封的方法
MBR一体化污水处理设备使用说明