羧甲基纤维素涂层和渗透脱水对苹果片冷冻干燥动力学的影响
Effect of Carboxylmethyl Cellulose Coating and Osmotic Dehydration on Freeze Drying Kinetics of Apple Slices.
作者信息
Rahimi Jamshid, Singh Ashutosh, Adewale Peter Olusola, Adedeji Akinbode A, Ngadi Michael O, Raghavan Vijaya
机构信息
Department of Bioresource Engineering, McGill University, 21111 Rue Lakeshore, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada.
出版信息
Foods. 2013 May 21;2(2):170-182. doi: 10.3390/foods2020170.
The effect of different concentrations of sugar solution (hypertonic) (30%, 45% and 60% w/v) and carboxyl methyl cellulose (CMC) (0%, 1% and 2% w/v) coating on freeze drying of apple slices was studied. In total, nine treatments with respect to concentrations of hypertonic solution and coating layer were prepared to analyze their influence on the physical and chemical properties of freeze dried apple slices. It was observed that increase in the sugar solution concentration, decreased the moisture content of the apple slices significantly impacting its water activity, texture and sugar gain. Application of different concentrations of CMC coating had no significant effect on the properties of dried apple slices. A significant change was observed for color of CMC coated freeze dried apple slices pretreated with 60% sugar solution. Drying kinetics of pretreated apple slices were fitted by using two drying models, Newton's and Page's. Page's model showed higher -square and lower root mean square error (RSME) compared to Newton's model.
研究了不同浓度的糖溶液（高渗）（30%、45%和60% w/v）以及羧甲基纤维素（CMC）（0%、1%和2% w/v）涂层对苹果片冷冻干燥的影响。总共制备了九种关于高渗溶液浓度和涂层的处理方式，以分析它们对冷冻干燥苹果片物理和化学性质的影响。观察到糖溶液浓度增加会显著降低苹果片的水分含量，对其水分活度、质地和糖分增加产生影响。不同浓度的CMC涂层应用对干燥苹果片的性质没有显著影响。在用60%糖溶液预处理的CMC涂层冷冻干燥苹果片的颜色上观察到了显著变化。预处理苹果片的干燥动力学通过牛顿模型和佩奇模型这两种干燥模型进行拟合。与牛顿模型相比，佩奇模型显示出更高的决定系数和更低的均方根误差（RSME）。
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