Factorial Design to Optimize Biosurfactant Production by Yarrowia lipolytica

Table 5

Coded and actual levels of the two variables in the experimental design.

Variable	Level
	−1.41	−1	0	1	+1.41
Glycerol (𝑧1) (% v.v^−1)	0.59	1	2	3	3.41
Glucose (𝑧4) (% w.v^−1)	1.17	2	4	6	6.83