Factorial Design to Optimize Biosurfactant Production by Yarrowia lipolytica

Table 2

Experimental range and levels of the independent variables used in the 2⁴ full factorial design for the carbon source study.

Variable (% w/v)		Level
	−1	0	1
Glycerol (𝑧1)	0	1	2
Olive oil (𝑧2)	0	2	4
Hexadecane (𝑧3)	0	1	2
Glucose (𝑧4)	0	2	4