Optimization of Cinnamon (Cinnamomum zeylanicum Blume) Essential Oil Extraction: Evaluation of Antioxidant and Antiproliferative Effects

Table 1

Used levels for the four factors.

Factor	Coded factor	Level
		Low (−1)	Center (0)	High (+1)
Water flow (L/min)	x1	0.80	1.25	1.70
Sample size (cm)	x2	5.0	6.5	8.0
Concentration of saline solution (g/L)	x3	175	262.5	350
Number of washings	x4	3	4	5