. 2017 Jul 4;15(2):345–358. doi: 10.1016/j.jgeb.2017.06.012

Table 4b.

Statistical analysis of Plackett–Burman design showing coefficient values, t- and p-values for each variable on extracellular and intracellular activity of wild and improved mutant strains of A. pullulans NAC8.

Variable	Effect	Coefficient	t-Value	p-Value
Constant		^A541.78	^A67.60	^A0.000^*
Constant		^B1217.60	^B43.19	^B0.000^*

NaNO₃	^A45.76	^A22.88	^A2.86	^A0.036^*
NaNO₃	^B55.50	^B27.80	^B0.99	^B0.370

NaCl	^A−34.32	^A−17.16	^A−2.14	^A0.085
NaCl	^B−39.30	^B−19.60	^B−0.70	^B0.517

Yeast extract	^A4.90	^A2.45	^A0.31	^A0.077^*
Yeast extract	^B729.00	^B364.50	^B12.93	^B0.000^*

Sucrose	^A140.56	^A70.28	^A8.77	^A0.000^*
Sucrose	^B153.60	^B76.80	^B2.72	^B0.042^*

NH₄Cl	^A34.33	^A17.16	^A2.14	^A0.085
NH₄Cl	^B176.60	^B88.30	^B3.13	^B0.026^*

KH₂PO₄	^A289.28	^A144.64	^A18.05	^A0.000^*
KH₂PO₄	^B523.00	^B26.20	^B0.93	^B0.396

Keys:

Intracellular fructosyltransferase by the improved mutant strain.

Extracellular fructosyltransferase by the improved mutant strain.

Significant values at p < 0.05.