Fig. 3
Comparison of CIP across groups of different initial pH. In box-whisker plots, the central mark indicates the median, and the bottom and top edges of the box indicate the 25th and 75th percentiles, respectively. The maximum whisker lengths are specified as 1.5 times the interquartile range and outliers are marked using +. Independent sample t-tests with false discovery rate (FDR) correction were conducted to compare data of each group with 0. Symbols *, **, and *** indicate that the null hypothesis could be rejected at a significance level of 0.05, 0.01, and 0.001, respectively. Different letters mean significant differences between different pH groups (p < 0.05, one-way ANOVA, post-hoc LSD test)
