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Table 1 Statistical analysis of variables

From: Efficient production of heat-stable antifungal factor through integrating statistical optimization with a two-stage temperature control strategy in Lysobacter enzymogenes OH11

Factors

Variables

Low level (− 1)

High level (+ 1)

Coefficient

SS

F-Value

P-value

Inoculation amount (%)

X1

2

2.5

−4.20

211.51

0.60

0.4746

Medium capacity (%)

X2

16

20

14.19

2415.71

6.82

0.0476

Initial pH

X3

5.5

7.0

4.93

292.25

0.83

0.4054

Culture temperature (°C)

X4

22

28

31.31

11,760.04

33.20

0.0022

Rotation speed (r min−1)

X5

150

200

−0.71

6.08

0.017

0.9009

Fermentation time (h)

X6

36

48

36.41

15,909.71

44.92

0.0011

  1. R2 = 0.9453, R2(Adj) = 0.8796; a Significant at 95% confidence degree (P<0.05)