Table 2.

Independence factors and corresponding levels for clarification of apple juice.

Code	Variables	Units	levels
			-α	−1	0	+1	+α
A	Pectinase load	U/ml of apple juice	10	20	30	40	50
B	Xylanase load	U/ml of apple juice	10	20	30	40	50
C	Holding time	min	40	60	80	100	120
D	Temperature	°C	40	45	50	55	60