Fig. (3) Uptake of Ca⁺² & iP from 1.5×Sr-SBF and 1.5 × Zn-SBF post each soaking periods with respect to the mother solution. (Where, Ca⁺²_m & iP_m are for mother solution, and, Ca⁺²_n &iP_n are specific for each period). The drawn curves represent the polynomial fitting of the third order to the obtained results.