4Thomas K, Susanne R, Thanou M. Trimethylated chitosan as non-viral gene delivery vectors : Cytotoxicity and transfcction et~iciency [J], Journal of Controlled Release, 2005,103:643-651.
5Caiqin Q, Ling X, Yumin D, et al. A new cross-linked quatemized-chitosan resin as the support of borohydride reducing agent [J]. Reactive and Functional Polymer, 2002,50(2): 165-171.
6Kim Y N, Choi H M, Yoon J H. Synthesis of a quaternary ammonium derivative of chitosan and its application to a cotton antimicrobial finish [J], Textile Research Journal, 1998,68(6): 428-434.
7Mi F L, Shyu S S, Chen C T, et al. Porous chitosan microsphere for controlling the antigen release of Newcastle disease vaccine: preparation of antigen-adsorbed microsere and in vitro release [J]. Biomaterials, 1999,20(17):1603-1612.
8Kim C H,Choi K S. Synthesis quatemized-chitosan derivatives spaces [J]. Journal of Industrial and antibacterial activity oi having different methylene and Engineering Chemistry, 2002,8(1):71-76.
9Chcn L, Chen D H, Wu C L. Study on fioceulation mechanism of chitosan with pyrenc-fluorcsccrscnc probe method [J]. Chinese Journal of Chemistry, 2003,21:1224-1228.