Formulation and Statistical Optimization of Culture Medium for Improved Production of Antimicrobial Compound by Streptomyces sp. JAJ06

Table 1

Low and high levels of each variable used in Plackett-Burman design.

Variables	Medium components	+values (g/L)	−values (g/L)
𝑋1	Starch	20	2.0
𝑋2	Yeast extract	8	0.8
𝑋3	Peptone	4	0.4
𝑋4	MgSO4	2	0.2
𝑋5	KBr	0.2	0.02
𝑋6	FeSO4·7H2O	0.08	0.008
𝑋7	CaCO3	4	0.4