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Table 1 Used levels of the experiments

From: Lawsonia inermis essential oil: extraction optimization by RSM, antioxidant activity, lipid peroxydation and antiproliferative effects

Factor

Coded symbol

-1

0

+ 1

Drying (%)

x1

0

50

100

Washings

x2

3

4

5

Salt concentration (g/L)

x3

175

262.5

350