Table 2.
A quality investigation of embryo-retaining polished rice by 6 types of vertical rice mill systems.

Type of a vertical rice mill system		Germ adherence (%)	Whiteness	Moisture content (%)	Broken rice (%)	Capacity (kg/h)
a	Mill A1 + Mill B2 (condition 1)	68.2±1.4	30.8±0.3	15.4±0.2	2.0±0.1	1,000
b	Mill A1 + Mill B2 (condition 2)	70.8±1.8	31.6±0.5	15.8±0.5	1.0±0.1	1,000
c	Mill A1 + Mill B2 (condition 3)No. of shaft-roller stone: 3, *Pendulum: small type, left position.	73.4±1.9	30.5±0.4	15.7±0.6	1.5±0.1	1,000
d	Mill A1 + Mill B2 (condition 4) No. of shaft-roller stone: 3, *Pendulum: middle type, center position.	73.3±2.1	30.7±0.2	15.7±0.7	2.5±0.2	1,000
e	Mill A1 + Mill B2 (condition 5) No. of shaft-roller stone: 4, *Pendulum: small and middle type, both end side position.	59.0±0.8	35.8±0.4	15.0±0.2	1.5±0.1	800
f	Mill A1 + Mill B2 (condition 6) No. of shaft-roller stone: 4, *Pendulum: middle type, end side position.	68.6±1.2	34.6±0.2	15.0±0.1	2.2±0.2	800

Mill A: a vertical mill with an abrasive and frictional roller.
Mill B: a vertical mill with a frictional roller