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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)