Figure 2

Adsorption of 223Ra to (a) Chlorella or (b) Zn-InsP6. The binding ratios of 223Ra at pH 1.2 (open circles) and pH 6.8 (closed circles) to Chlorella or Zn-InsP6 depended on the concentration of Chlorella or Zn-InsP6. Data are expressed as the mean ± SD of three samples. The highest SD values in (a) and in (b) are 0.69 and 1.57, respectively.