supports from National Natural Science Foundation of China(No.50233020,30300086);the financial support from Natural Science Foundation of Tianjin(No.05YFJMJC10200).
N-Methylene phosphonic chitosan (NMPCS), an amphiphilic macromolecule with powerful chelating ability of Ca^2+ ions, was synthesized and characterized. The physicochernical properties of NMPCS and the interactions ...