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首页> 外文期刊>American Journal of Chemical Engineering >Sorption Isotherm of Corn Chips Made from Blends of Corn Flour and Bambara Groundnut Nut Flour
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Sorption Isotherm of Corn Chips Made from Blends of Corn Flour and Bambara Groundnut Nut Flour

机译：吸附等温线的玉米芯片由玉米粉和bambara groudenut坚果面粉制成

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The adsorption equilibrium moisture contents of corn chips (kokoro) made from blends of maize flour and Bambara nut flour was investigated by measuring water activities at 27°C, 37°C and 40°C using the static gravimetric method. Sorption isotherms followed a type II shape in water activities range from 0.10 - 0.80 showing characteristics of most biological tissues. Five isotherm model equations were used which are BET, GAB, Oswin, Halsey and Henderson. The experiments were performed using polythene packaging and exposed petri dishes. The samples were weighed at two days interval until equilibrium was attained when three identical measurements were obtained. The equilibrium moisture content (EMC) decreased with increase in temperature at constant water activity and polythene packaging had lower EMC compared to petri-dishes. Oswin and Henderson model were best fit at 27°C with RSS = 1.929×10~(-5), SEE = 0.00011, R~(2) = 0.99531 and RSS = 0.001192, SEE = 0.00011, R~(2) = 0.9807 for polythene and petri-dish respectively. Oswin model was best fit for both storage conditions at 37°C and 40°C. The monolayer moisture content at the three temperatures ranged from 0.0193 - 0.0752 and the general model observed for this study that could predict the sorption behavior of Bambara-corn chips was Oswin model.
机译：使用静态重量法测量27℃，37℃和40℃的水活，研究了由玉米粉和Bambara坚果粉的共混物制成的玉米芯片（Kokoro）的吸附平衡水分含量。吸附等温线遵循水活动中的II型形状，范围为0.10-0-80，显示大多数生物组织的特征。使用了五个等温模型方程，其赌注，GAB，Oswin，Halsey和Henderson。使用聚乙烯包装和暴露的培养皿进行实验。将样品在两天的间隔中称重，直至在获得三个相同的测量时达到平衡。与培养皿相比，随着恒定水活性的温度升高，温度升高降低了平衡水分含量（EMC），与培养皿相比，聚乙烯包装具有较低的EMC。奥维林和亨德森型号最合适地贴合27°C，RSS = 1.929×10〜（5），见= 0.00011，R〜（2）= 0.99531和RSS = 0.001192，见= 0.00011，R〜（2）= 0.9807对于聚乙烯和培养皿。奥维林模型最适合于37°C和40°C的储存条件。三个温度的单层水分含量范围为0.0193-0.0752和本研究观察到的一般模型可以预测Bambara-玉米芯片的吸附行为是oswin模型。

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