Chitosan Derivatives - Chitosan Based Hydrogels: Functions and Applications - page 92

9. Domard, A., Rinaudo, M., and Terrassin, C. 1986. New method for the quaternization of chito-
san. Int J Biol Macromol 8: 105-107.
10. Domard, A., Gey, C., Rinaudo, M., and Terrassin, C. 1987. 13 C and 1 H-NMR spectroscopy of
chitosan and N -trimethyl chloride derivatives. Int J Biol Macromol 9: 233-327.
11. Sieval, A. B., Thanou, M., Kot´e, A. F., Verhoef, J. C., Brussee, J., and Junginger, H. E. 1998.
Preparation and NMR characterization of highly substituted N -trimethyl chitosan chloride.
Carbohydr Polym 36: 157-165.
12. Hamman, J. H. and Kot´e, A. F. 2001. Effect of the type of base and number of reaction steps
on the degree of quaternization and molecular weight of N -trimethyl chitosan chloride. Drug
Dev Ind Pharm 27: 373-380.
13. Snyman, D., Hamman, J. H., Kotze, J. S., Rollings, J. E., and Kot´e, A. F. 2002. The relationship
between the absolute molecular weight and the degree of quaternization of N -trimethyl chito-
san chloride. Carbohydr Polym 50: 145-150.
14. Curiti, E., Britto, D., and Campana-Filho, D. P. 2003. Methylation of chitosan with iodomethane:
Effect of reaction conditions on chemoselectivity and degree of substitution. Macromol Biosci 3:
571-576.
15. Polnok, A., Borchard, G., Verhoef, J. C., Sarisuta, N., and Junginger, H. E. 2004. Influence of
methylation process on the degree of quaternization of N -trimethyl chitosan chloride. Eur J
Pharm Biopharm 57: 77-83.
16. Runarsson, O. V., Holappa, J., Nevalainen, T., Hjalmarsdottir, M., Jarvinen, T., Loftsson, T.
Einarsson, J. M. Josdottir, S. Valdimarsdottir, M., and Masson, M. 2007. Antibacterial activity of
methylated chitosan and chitooligomer derivatives: Synthesis and structure activity relation-
ships. Eur Polym J 43: 2660-2671.
17. Runarsson, O. V., Holappa, J., Jonsdottir, S., Steinsson, H., and Masson, M. 2008. N -selective “one
pot” synthesis of highly N -substituted trimethyl chitosan (TMC). Carbohydr Polym 74: 740-744.
18. Verheul, R. J., Amidi, M., Wal, S., Riet, E., Jiskoot, W., and Hennink, W. 2008. Synthesis, charac-
terization and in vitro biological properties of O -methyl free N,N,N-trimethylated chitosan.
Biomaterials 29: 3642-3649.
19. Loubaki, E., Ourevitch, M., and Sicsic, S. 1991. Chemical modification of chitosan by glycidyl
trimethylammonium chloride: Characterization of modified chitosan by 13C- and 1H-NMR
spectroscopy. Eur Polym J 27: 311-317.
20. Daly, W. H. and Manuszak-Guerrini, M. A. 2001. Biocidal chitosan derivatives for cosmetics
and pharmaceuticals. US Patent, Pat. No. 6 306 835.
21. Geresh, S., Dawadi, R. P., and Arad, S. M. 2000. Chemical modifications of biopolymers:
Quaternization of the extracellular polysaccharide of the red microalga Porphyridium sp.
Carbohydr Polym 63: 75-80.
22. Song, Y., Sun, Y., Zhang, X., Zhou, J., and Zhang, L. 2008. Homogeneous quaternization of cel-
lulose in NaOH/urea aqueous solutions as gene carriers. Biomacromolecules 9: 2259-2264.
23. Sajomsang, W., Tantayanon, S., Tangpasuthadol, V., and Daly, W. H. 2009. Quaternization of
N -aryl chitosan derivatives: Synthesis, characterization, and antibacterial activity. Carbohydr
Res 344: 2502-2511.
24. De Britto, D. and Assis, O. B. G. 2007. A novel method for obtaining a quaternary salt of chito-
san. Carbohydr Polym 69: 305-310.
25. Kim, C. H. and Choi, K. S. 2002. Synthesis and antibacterial activity of quaternized chitosan
derivatives having different methylene spacers. J Ind Eng Chem 8: 71-76.
26. Kim, C. H., Choi, J. W., Chun, H. J., and Choi, K. S. 1997. Synthesis of chitosan derivatives with
quaternary ammonium salt and their antibacterial activity. Polym Bull 38: 387-393.
27. Sadeghi, A. M. M., Amini, M., Avadi, M. R., Siedi, F., Rafiee-Tehrani, M., and Junginger, H. E.
2008. Synthesis, characterization, and antibacterial effects of trimethylated and triethylated
6-NH 2 -6-deoxy chitosan. J Bioact Compat Pol 23: 262-275.
28. Holappa, J., Nevalainen, T., Savolainen, J., Soininen, P., Elomaa, M., Safin, R., Suvanto, S.
Pakkanen, T. Masson, M., Loftsson, T., and Jarvinen, T. 2004. Synthesis and characterization of
chitosan N -betainates having various degrees of substitution. Macromolecules 37: 2784-2789.