Moisture Dependent Physical Properties of Dry Sweet Corn Kernels

Figures & data

Table 1 Length, width, thickness, geometric mean diameter, sphericity index, surface area, and volume of sweet corn kernels at different moisture

Moisture content, % (dry basis)	Length(L) mm	Width(W) mm	Thickness (T) mm	Geometric mean diameter [(L × W × T)^1/3] mm	Sphericity index %	Surface area (S) mm^2	Volume (V) mm^3
9.12	9.87	7.41	3.25	6.18	62.6	120.09	93.84
11.08	10.15	7.90	3.58	6.58	64.9	136.30	121.23
13.24	10.46	8.25	3.92	6.95	66.4	151.84	144.25
15.11	10.80	8.85	4.05	7.26	67.3	165.90	165.72
17.06	11.09	9.25	4.37	7.62	68.8	182.87	194.30
Mean	10.47	8.33	3.83	6.92	66.0	151.40	143.87
Standard deviation	0.49	0.73	0.43	0.56	2.37	24.54	38.85

Table 2 Thousand kernel weight, bulk density, apparent density, porosity, and angle of repose of sweet corn kernels at different moisture content

Moisture content % (dry basis)	Thousand kernel weight g	Bulk density kg/m^3	Apparent density kg/m^3	Porosity %	Angle of repose°
9.12	220.0	765	1315	41.83	30.20
11.08	232.0	748	1295	42.24	31.70
13.24	246.0	732	1275	42.59	32.80
15.11	259.0	714	1253	43.02	34.00
17.06	268.0	698	1232	43.34	35.20
Mean	245.0	731.40	1274	42.60	32.78
Standard deviation	19.49	26.57	32.89	0.60	1.95

Table 3 Static coefficient of friction of sweet corn kernels on various surfaces at different moisture content

Moisture content % (dry basis)	Plywood	Alimunium	Galvanized iron sheet
9.12	0.680	0.530	0.605
11.08	0.717	0.564	0.649
13.24	0.775	0.583	0.674
15.11	0.832	0.612	0.710
17.06	0.891	0.644	0.741
Mean	0.780	0.590	0.680
Standard deviation	0.090	0.040	0.050

Figure 1 Effect of moisture content on sphericity of sweet corn.

Figure 2 Effect of moisture content on volume of sweet corn.

Figure 3 Effect of moisture content on surface area of sweet corn.

Figure 4 Effect of moisture content on 1000 kernel weight of sweet corn.

Figure 5 Effect of moisture content on density of sweet corn. (⋄), apparent density; (□), bulk density.

Figure 6 Effect of moisture content on porosity of sweet corn.

Figure 7 Effect of moisture content on static coefficient of friction of sweet corn. (⋄), Plywood; (Δ), Galvanized iron; (○), Aluminum.

Table 4 The relationship between moisture content and static coefficients of friction for various surfaces. ^a

Surface	Equations	R ^2
Plywood	μ p = 0.4254 + 0.0269 M c	0.993
Galvanized iron sheet	μ g = 0.4566 + 0.0167 M c	0.992
Aluminum sheet	μ a = 0.4050 + 0.0138 M c	0.990
^a R ^2: coefficient of determination.

Figure 8 Effect of moisture content on angle of repose of sweet corn.