Modification of Medium Composition for Enhancing the Production of Antifungal Activity from Xenorhabdus stockiae PB09 by Using Response Surface Methodology

Table 6

Central composite design of the three variables and their corresponding experimental data.

Run	X1: sucrose (g/L)	X2: yeast extract (g/L)	X3: mineral (g/L)	Mycelial inhibition (%)
				Observed	Predicted
1	1	−1	−1	78.32	75.15
2	−1	−1	−1	76.38	77.30
3	1	1	−1	81.06	80.25
4	−1	1	−1	93.73	91.41
5	1	−1	1	81.67	82.03
6	−1	−1	1	82.86	81.71
7	1	1	1	89.46	86.58
8	−1	1	1	94.07	95.28
9	−1.68	0	0	76.46	79.38
10	1.68	0	0	88.63	88.49
11	0	−1.68	0	74.98	75.84
12	0	1.68	0	89.63	91.54
13	0	0	−1.68	78.86	81.12
14	0	0	1.68	89.64	90.16
15	0	0	0	92.48	96.06
16	0	0	0	97.67	96.06
17	0	0	0	97.86	96.06
18	0	0	0	96.16	96.06
19	0	0	0	94.03	96.06
20	0	0	0	98.65	96.06