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Table 1 Application of 2-factorial design at various process parameters for AXE production by P. notatum NRRL-1249*

From: Determination of some significant batch culture conditions affecting acetyl-xylan esterase production by Penicillium notatum NRRL-1249

Process parameters at 2-factorial design AXE production (U/g)
Wheat bran (g)A MSS pHB Time of incubation (h)C Urea (%, w/w)D Tween-80 (%, v/w)E Observed Predicted
5 4.5 24 na na 185 198
7.5 4.5 36 na na 312 385
10 5 36 0.1 0.25 455 560
10 5 48 0.2 0.5 760 832
12.5 5.5 60 0.3 0.75 646 811
  1. *The different letters represent significant process parameters for AXE production. Statistical analysis of the model was based on 2-factorial experimental design. 'na' means that nitrogen source was not added.