Some Physical and Frictional Properties of Dikanut (Irvingiawombolu) as a Function of Moisture Content

Abstract

Some physical and frictional properties of Dikanut (Irvingiawombolu) were evaluated as a function of moisture content varying from 7.02% to 15.04% (dry basis). Regression models were equally developed to these effects. All properties studied were found to have a polynomial response to moisture content increase within the moisture content range studied (7.02%  to 15.04% dry basis).The kernel dimensions increased from 44.00 to 47.73mm, 33.50 to 34.89mm, 20.60 to 21.79mm and 32.20 to 33.73mm for major, intermediate, minor and equivalent diameters respectively as moisture content increased. The kernel volume and surface area increased from 120.01mm³ to 158.56mm³ and 102.04mm² to 131.64mm². Bulk density and true density increased from 3.64g/cm³ to 4.33g/cm³, and 10.31g/cm³ to 12.26g/cm³ respectively with increase in the moisture content range tested. Aspect ratio and sphericity and porosity increased from 0.74 to 0.79; 0.70 to 0.72; 0.41 to 0.60 respectively within the moisture content range studied. Angle of repose increased from 20.10 ? to 37.20 ? while static coefficient of friction increased from 0.60 to 0.92 (plywood), 0.50 to 0.82 (mild steel), 0.37 to 0.70 (aluminum), 0.30 to 0.64 (plastic) as moisture content increased from 7.02 to 15.04% (dry basis)with plywood giving the highest range of values. The relevant data obtained for this variety would be useful for design and development of machines and equipment for processing and handling operations.

Keywords: physical properties, Dikanut, moisture content, postharvest, processing