Some physical and frictional properties of Dikanut (Irvingia wombolu) 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: Dikanut, Moisture Content, Physical Properties, Postharvest, Processing
