Moisture Dependent Diffusion and Shrinkage in Yam during Drying
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Emmanuel A. Amankwah
Abstract
Crank’s analytical approximations for Fick’s diffusion equation were used to investigate the effect of moisture dependent sample thickness and diffusivity on the behavior of yam (Dioscoreaceae rotundata) cubicles during drying processes. Drying and shrinkage experiments were separately conducted at temperatures of 30, 40 and 50 °C in a cabinet drier. The comparative study of moisture dependent shrinkage and moisture dependent diffusivity justifies the interdependence of diffusivity and shrinkage due to water loss during drying. The behavior for yam is best explained by a combination of fractal moisture dependent shrinkage and moisture dependent diffusion, describing both the drying and rate curves better with good prediction of the high moisture regions. This assertion was reached as a result of low mean square error, standard error, percentage relative deviation, Akaike’s Information Criterion and high coefficient of determination. The results may indicate a varying mobility of water in food matrix of different moisture content in the multilayer and monolayer regimes.
Acknowledgements
This project was funded by the Wageningen University and Research Centre (WUR), The Netherlands and Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana. The authors are grateful for this financial and consumables contribution.
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Articles in the same Issue
- Development of Novel Electronic Nose Applied for Strawberry Freshness Detection during Storage
- Moisture Dependent Diffusion and Shrinkage in Yam during Drying
- Optimization and Characterization of Wheat Bran Modified by Citric Acid Using a Dry Reaction Method for Enhancement of Methylene Blue Adsorption
- Effects of Ozone Treatment on the Storage Quality of Post-Harvest Tomato
- Effects of Instant Controlled Pressure Drop (DIC) Drying on the Texture and Tissue Morphology of Fruits and Vegetables
- Prebiotic-Like Effects of Water Soluble Chitosan on the Intestinal Microflora in Mice
- Dissolution Characteristics of Freeze-Dried Pullulan Particles Affected by Solution Concentration and Freezing Medium
- Microencapsulation of Ammonium Bicarbonate by Phase Separation and Using Palm Stearin/Carnauba Wax as Wall Materials
