2.6. Statistical analysis
Data were subjected to normal distribution tests (both Kolmo-
goroveSmirnov and Shapiro Wilk). Particle size was analyzed by a U
ManneWhitney test (Fig. 2). Results in Tables 1 and 2 were pre-
sented as mean Standard Deviation (SD) of replicated de-
terminations (in logarithmic scale). Statistical significant
differences were measured by Student’s t-test. Data showed in
Tables 1 and 2 were subjected to an independent t-Test and paired
t-Test, respectively. Data from Fig. 4 were analyzed by means of
two-way repeated measures ANOVA (time and temperature). Sta-
tistical significance was set at p < 0.05. All analysis were performed
using SPSS version 19.0 for Windows (SPSS, Chicago, Illinois, USA).