The activity of cell adsorbed on the surface containing calcium was higher than that containing phosphorus . this is possible because the surface containing calcium with positive charge was more beneficial to the adsorption of bovine albumin serum and the ligant proteins of cell onto the s urfaces 在含钙的钛表面，蛋白质和细胞更容易吸附，并且吸附的细胞有更高活性，这可能是含钙表面的正电荷有利于血清蛋白的吸附和细胞的配体蛋白吸附。
