Figure 2. Effects of increasing concentrations of n-TiO₂ on maximum algal biomass.

Slopes of maximum algal biomass (as measured by fluorescence; B_max) versus exposure concentration of n-TiO₂ ([n-TiO₂], in mg L⁻¹). Dots represent the R² of the trendline represented by each bar. Statistics shown relate to a 1-sample t-test, comparing the average of the slopes to a H_o =0. Dotted lines represent the 95% confidence intervals around the mean of all slopes. Positive (or negative) bars indicate that increasing exposure concentrations of n-TiO₂ had increasingly positive (or negative) effects on B_max.