*2.6. Statistical Analysis*

Statistical analysis of the results were accomplished using Statistica v 13.0 software (StatSoft, Kraków, Poland). The processed results were presented in the graphical form as the mean value and the standard deviation. To achieve the objective of verification the hypothesis, the non-parametric tests were applied: Kruskal–Wallis test (α = 0.05), and Mann–Whitney test (α = 0.05).
