Influence of Inherent Moisture Content on the Deformation Properties ...
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Influence of Inherent Moisture Content on the Deformation Properties ...
2 Millfields Cottage, Mill Lane, Thurston, Bury St Edmunds, IP31 3QB, UK. (Formerly, Senior Lecturer of Agro Process Engineering, Silsoe College, Cranfield ...
Influence of Inherent Moisture Content on the Deformation Properties of Coconut Tissues During Mechanical Oil Expression *J. J. Mpagalile1 and B. Clarke2
Department of Food Science and Technology Sokoine University of Agriculture, P. O. Box 3006 Morogoro, Tanzania 1
Millfields Cottage, Mill Lane, Thurston, Bury St Edmunds, IP31 3QB, UK (Formerly, Senior Lecturer of Agro Process Engineering, Silsoe College, Cranfield University, UK). 2
Abstract
The effect of moisture content on the deformation properties of coconut (Cocos nucifera) endosperm under mechanical uni-axial compression during a simulated oil expression situation was investigated. Fresh coconut samples at 45% moisture content (wet basis) and prepared samples at 3%, 7%, 11% and 15% wet basis moisture content were used. Results showed that tissues at higher moisture content (11 and 15%) had lower compressive strength hence lower forces at bio-yield point than drier samples and they also experienced higher deformation at bio-yield point. Low moisture samples (3% and 7%) required more force to reach their bio-yield points at 17.7 N and 15.3 N respectively as compared to specimens with moisture content of 11% and 15% which reached bio yield points at 11.4 N and 11.5 N respectively . Results showed that for samples at 3% and 7% wet basis moisture content the difference between bio-yield and oil-points was not significant (P>0.05) but there was a significant difference (P
