Response surface modeling for hot, humid air decontamination of materials contaminated with Bacillus anthracis ∆Sterne and Bacillus thuringiensis Al Hakam spores

AMB Express

Table 5 Parameter estimates for B. anthracis ∆Sterne and B. thuringiensis Al Hakam on nylon

Model term	Parameter estimate	Standard error	t-value	P-value
B. anthracis ∆Sterne
Intercept	0.0758	0.3034	0.2500	0.8126
Block (b)	2.1487	0.3841	5.5930	0.0025
x ₁	6.0157	0.2809	21.4170	4.1152 × 10⁻⁶
x ₂	4.6424	0.2405	19.3010	6.8867 × 10⁻⁶
x ₃	1.3926	0.2405	5.7900	0.0022
x ₁ x ₂	4.2282	0.2809	15.0540	2.3431 × 10⁻⁵
x ₁ x ₃	−0.8748	0.2809	−3.1140	0.0264
x ₂ x ₃	−0.3611	0.2809	−1.2860	0.2549
x ² ₁	5.3117	0.4940	10.7540	0.0001
x ² ₂	0.6467	0.4222	1.5320	0.1862
x ² ₃	−2.3881	0.4222	−5.6560	0.0024
B. thuringiensis Al Hakam
Intercept	−0.2778	0.5317	−0.5220	0.6127
Block (b)	0.1487	0.6584	0.2260	0.8259
x ₁	4.544	0.3822	11.8900	3.1850 × 10⁻⁷
x ₂	4.0575	0.3473	11.6830	3.7552 × 10⁻⁷
x ₁ x ₂	3.9837	0.3883	10.2600	1.2560 × 10⁻⁶
x ² ₁	1.5441	0.7735	1.9960	0.0739
x ² ₂	2.6875	0.7264	3.7000	0.0041