Sieve holes diameter, mm Moisture content, % Surface area before grinding, mm2 WSG, g WSP, g MWD, mm Number of particles (N) Surface area after grinding, mm2 Grinding effectiveness 4 10 127.26 0.27 0.001 1.47 270 1832.01 14.4 14 134.92 0.3 0.0014 1.66 214.29 1854.16 13.74 18 145.74 0.36 0.0021 1.91 171.43 1963.74 13.47 6 10 127.26 0.27 0.0018 1.81 150 1543.04 12.12 14 134.92 0.3 0.0021 1.88 142.86 1585.46 11.75 18 145.74 0.36 0.0028 2.16 128.57 1883.55 12.92 8 10 127.26 0.27 0.0045 2.45 60 1130.87 8.88 14 134.92 0.3 0.0052 2.6 57.7 1224.76 9.08 18 145.74 0.36 0.0066 2.89 54.55 1430.61 9.82

WSG: weight of single grain and WSP: weight of single particle Table 2: Effect of sieve hole diameter and cereal moisture content on the grinding effectiveness.