Figure 4
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F2191-0855-3-14/MediaObjects/13568_2013_Article_124_Fig4_HTML.jpg)
The decolorization of tested dyes in triphenylmethane group. Each bar represents mean ± standard deviation and letters a, b, c, d, e and f represent different level of significance of each dye (p<0.05).
The decolorization of tested dyes in triphenylmethane group. Each bar represents mean ± standard deviation and letters a, b, c, d, e and f represent different level of significance of each dye (p<0.05).