. 2018 Dec 11;56(2):763–774. doi: 10.1007/s13197-018-3536-9

Table 1.

Some physical properties, coefficient of friction, angle of repose, ratios and coefficient of correlation (r) values of pink pinion nuts (PN) and kernel (PK) at 7.58% moisture content

Physical properties	PN	PK
Length = L (mm)	13.51 ± 1.29^a	9.91 ± 0.92^b
Width = W (mm)	8.15 ± 0.75^a	5.16 ± 0.51^b
Thickness = T (mm)	7.10 ± 0.68^a	4.10 ± 0.41^b
Geometric diameter = Dg (mm)	9.20 ± 0.71^a	5.93 ± 0.40^b
Arithmetic diameter = Da (mm)	9.59 ± 0.71^a	6.39 ± 0.44^a
Sphericity = Ø (%)	68.31 ± 3.71^a	60.08 ± 4.35^b
Aspect rations = AR (%)	60.58 ± 5.28^a	52.37 ± 6.12^b
Surface area = SA (mm²)	267.57 ± 41.64^a	110.89 ± 15.13^b
Volume = V (mm³)	289.68 ± 68.27^a	23.12 ± 3.58^b
Mass = M (g)	0.39 ± 0.08^a	0.13 ± 0.03^b
Bulk density = BD (kg/m³)	632.49 ± 13.87^a	556.26 ± 1.91^b
Hardness = H (N)	235.25 ± 36.15^a	3.21 ± 0.31^b
Coefficient of friction
Plywood	0.35 ± 0.02^a	0.58 ± 0.04^b
Stainless Steel	0.63 ± 0.05^a	0.67 ± 0.06^a
Glass	0.45 ± 0.04^a	0.78 ± 0.05^b
Polyvinyl chloride (PVC)	0.35 ± 0.05^a	0.75 ± 0.05^b
Rubber	0.88 ± 0.15^a	0.90 ± 0.07^a
Galvanized steel	0.62 ± 0.04^a	0.72 ± 0.07^b
Angle of repose (°)
Plywood	27.97 ± 0.40^a	26.96 ± 1.36^b
Stainless Steel	27.41 ± 0.97^a	27.76 ± 0.38^a
Glass	27.02 ± 0.86^a	26.28 ± 0.28^b
Polyvinyl chloride (PVC)	20.45 ± 1.90^a	25.66 ± 0.45^b
Rubber	28.80 ± 0.83^a	27.49 ± 1.44^b
Galvanized steel	27.73 ± 0.53^a	26.88 ± 0.39^b
Ratios
L/W	1.66 ± 0.14 (0.58**)	1.94 ± 0.23 (0.27**)
L/T	1.91 ± 0.19 (0.47**)	2.44 ± 0.31 (0.11)
L/M	36.53 ± 9.14 (− 0.13)	77.51 ± 15.92 (0.26**)
L/Da	1.41 ± 0.06 (0.89**)	1.55 ± 0.08 (0.84**)
T/M	19.16 ± 4.43 (− 0.06)	32.34 ± 8.11 (− 0.14)
W/M	22.01 ± 5.33 (− 0.08)	40.42 ± 8.87 (0.14)

Values represent the average of 100 measurements ± standard deviation (coefficient of correlation). Means in rows with different letters are significantly different (P < 0.05)

**Correlations significant at P < 0.01