Repeated Batch Fermentation Biotechnology for the Biosynthesis of Lipid and Gamma-Linolenic Acid by Cunninghamella bainieri 2A1

Table 1

Test variables and levels for central composite design (CCD).

Variable	Symbol	Level
		Actual range			Coded value
		Low	Middle	High	Low	Middle	High
Glucose concentration (g/L)	𝑋1	20	30	40	−1	0	+1
Ammonium tartrate (g/L)	𝑋2	1	2.5	4	−1	0	+1
Harvesting time (h)	𝑋3	12	30	48	−1	0	+1