Evaluation of conventional and response surface level optimisation of n-dodecane (n-C12) mineralisation by psychrotolerant strains isolated from pristine soil at Southern Victoria Island, Antarctica

Table 3 ANOVA for n-dodecane mineralisation by strain ADL15 in CCD

Source	Sum of squares	DF	Mean square	F value	Prob > F (p value)
Model	4455.95	14	318.28	18.28	< 0.0001*
A	33.41	1	33.41	1.92	0.1862**
B	96.80	1	96.80	5.56	0.0324*
C	232.13	1	232.13	13.33	0.0024*
D	1042.93	1	1042.93	59.91	< 0.0001*
A ²	233.71	1	233.71	13.42	0.0023*
B ²	1531.72	1	1531.72	87.99	< 0.0001*
C ²	1486.93	1	1486.93	85.41	< 0.0001*
D ²	208.81	1	208.81	11.99	0.0035*
AB	11.79	1	11.79	0.68	0.4235**
AC	16.27	1	16.27	0.93	0.3491**
AD	0.40	1	0.40	0.023	0.8816**
BC	28.58	1	28.58	1.64	0.2195**
BD	293.97	1	293.97	16.89	0.0009*
CD	8.26	1	8.26	0.47	0.5014**
Residual	261.13	15	17.41
Lack of fit	236.16	10	23.62	4.73	0.0502**
Pure error	24.98	5	5.00
Cor total	4717.08	29
Standard deviation	4.17		R²		0.9446
Mean	14.32		Adjusted R²		0.8930
C.V.	29.13		Predicted R²		0.7040
PRESS	1396.23		Adeq precision		12.819

A: pH; B: temperature (°C); C: diesel concentration (% v/v); D: NaCl concentration (% w/v)
* Significant; ** not significant

ISSN: 1475-2859