Effects of a Combined Processes of Low-Pressure Steam Enrichment and Low-Pressure Superheated Steam Drying on the γ-Aminobutyric Acid Content of Japonica Rice

Table 1

The factor levels and coding values of the Box-Behnken design of wet steam enrichment.

Factor	Code	Level
		-1	0	1
Pressure/MPa	A	0.02	0.025	0.03
Temperature/°C	B	55	60	65
Time/h	C	4	5	6
Flow rate/(L/h)	D	0.1	0.3	0.5