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. 2022 Dec 6;12:21059. doi: 10.1038/s41598-022-25339-3

Table 3.

Results of ANOVA statistical analysis of tested factors’ effect on size of the produced iron nanoparticles, employing Box-Behnken design.

Variable Effect (coefficient) Standard error P value Significance
A 9.63 19.38 0.6406 Non-Significant
B − 126.13 19.38 0.0013 Significant
C − 21.00 19.38 0.3281 Non-significant
AB 11.50 27.41 0.6923 Non-significant
AC − 35.25 27.41 0.2548 Non-significant
BC 107.75 27.41 0.0111 Significant
A2 138.75 28.53 0.0046 Significant
B2 18.25 28.53 0.5506 Non-significant
C2 117.50 28.53 0.0092 Significant
Model 137.00 31.66 0.0084 Significant

A = Salt conc. “FeSO4.7H2O”, B = Culture filtrate volume, C = pH.