Comparison of Water Adsorption Characteristics of Plantain and Cocoyam in a Controlled Storage Condition.

Okunola, Abiodun A. and Igbeka, Joseph C. and Okunola, Caroline O. and Ojediran, John O (2015) Comparison of Water Adsorption Characteristics of Plantain and Cocoyam in a Controlled Storage Condition. Food Science and Quality Managemen, 43. pp. 7-13. ISSN ISSN 2225-0557

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Abstract

This investigation was conducted to study the behaviour of dehydrated products of cocoyam and plantain in a controlled storage environment at temperature range of 25 and 40oC. Salt solutions were used to achieve water activity that ranged from 0.08 to 0.97. Equilibrium moisture content obtained was used to produce sorption isotherms at these temperatures. Sorption models of Halsey, Chung Pfost, and Henderson were evaluated on the experimental data as well as modified versions of Halsey and Henderson. Co-efficient of determination ranged from 0.80 to 0.97 in all the models. Most equilibrium moisture content obtained during the experiment reflected adsorption except for very low water activity. Chung Pfost equation gave the best fit for the absorption characteristics of these crops having the least residual mean square within 0.03 to 0.11%. Plantain exhibited higher affinity for water than cocoyam in all the relative humidity range. Least moisture content derived for storage stability of these crops varied from 6.5 to 8.2 and 6.3 to 8.2 % in cocoyam and plantain respectively. The region of local isotherm II of relative humidity between 23 and 65 % was identified as the region for optimum storage.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: DR ABIODUN OKUNOLA
Date Deposited: 12 Jul 2017 16:22
Last Modified: 12 Jul 2017 16:22
URI: http://eprints.lmu.edu.ng/id/eprint/560

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