Microbial anionic polysaccharides, although structurally closely related, exhibit strikingly different gelling properties in aqueous media (physical gels formation). Experimental observations are traced to differences, minor differences in some instances, in primary structures. Chemical gels have been prepared using deacylated gellan by means of an interchain partial esterification procedure, and a sample subjected to preliminary characterization in terms of swelling properties. NMR water proton relaxation data show that such amples display a remarkable water retention capability.
Get full access to this article
View all access options for this article.
References
1.
1. Sanford, P. A. and J. Baird. 1983. The Polysaccharides, G. O. Aspinall, ed., Toronto: Academic Press, Inc., Vol. 2, p. 411.
2.
2. Crescenzi, V.1994. Trends in Polymer Science, 2:104.
3.
b) Della Valle, F., V. Crescenzi and L. Callegaro. 1991. "Gellan Esters," E.P.O. EP 0518710A, USA 5,332,809.
4.
4. Crescenzi, V., M. Dentini, M. Segatori, C. Tiblandi, L. Callegaro and L. Benedetti. 1992. Carbohydr. Res., 231:73.
5.
5. Chandrasekaran, R., A. Radha and A. Giacometti. 1994. Carbohydrate Polymers, in press.
6.
6. Crescenzi, V., M. Dentini, S. Maschio and M. Segatori. 1993. Makromol. Chem., Makromol. Symp, 76:95.
7.
7. Crescenzi, V., M. Dentini and L. Callegaro. 1992. Harnessing Biotechnology for the 21st Century, M. R. Ladisch and A. Bose, eds., Washington, DC: American Chemical Society, p. 88.
8.
8. Sanzgiri, Y. D., S. Maschio, V. Crescenzi, L. Callegaro, E. M. Topp and V. J. Stella. 1993. J. Controlled Release, 26:195.
9.
9. Park, K., W. S. W. Shalaby and H. Park. 1993. Biodegradable Hydrogels for Drug Delivery, Lancaster: Technomic Publishing Co., Inc.
10.
10. Nisbet, B. A., I. W. Sutherl and, I. J. Bradshaw, M. Kerr, E. R. Morris and W. A. Shepperson. 1984. Carbohydr. Polym., 4:377.
11.
11. O'Neill, M. A., V. J. Morris, R. R. Selvendran, I. W. Sutherland and I. T. Taylor. 1986. Carbohydr. Res., 148:63.
12.
12. Dutton, G. G. S. and E. H. Merrifield. 1982. Carbohydr. Res., 105:189.
13.
13. Atkins, E. D. T., P. T. Attwool, M. J. Miles, V. J. Morris, M. A. O'Neill and I. W. Sutherland. 1987. Int. J. Biol. Macromol., 9:115.
14.
14. Chapman, H. D., G. R. Chilvers and V. J. Morris. 1987. Carbohydr. Polym., 7:449.
15.
15. Crescenzi, V., M. Dentini and I. C. M. Dea. 1987. Carbohydr. Res., 160:283.
16.
16. Callegaro, L., F. Biviano and V. Crescenzi. 1993. "Auto-Cross-Linked Gellan Gum," Intl. Patent Appln. N. W094/0349.
17.
17. Watanabe, T., N. Murase, M. Staemmler and K. Gersonde. 1992. Magnetic Resonance in Medicine, 27:118.
18.
18. Crescenzi, V., M. Dentini and T. Coviella1992. Frontiers in Carbohydrate Research-2, R. Chandrasekaran, ed., London: Elsevier, p. 100.
19.
19. Crescenzi, V., M. Dentini and T. Coviello. 1992. Novel Biodegradable Microbial Polymers, E. A. Dawes, ed., Netherlands: Kluwer Academic Publishers, p. 277.
20.
20. Milas, M., X. Shi and M. Rinaudo. 1990. Biopolymers, 30:451.
21.
21. Grasdalen, H. and O. Smidsroed. 1987. Carbohydi Polym., 7:371.
22.
22. Chandrasekaran, R., L. C. Puigianer, K. L. Joyce and S. Arnott. 1988. Carbohydr. Res., 181:23.
23.
23. Hember, M. W. N., R. K. Richardson and E. R. Morris. 1994. Carbohydr. Res., 252:209.
24.
24. Crescenzi, V., M. Dentini, J. Ferretti, B. Sambuco and A. L. Segre, in preparation.
25.
25. Brosio, E., M. Delfini, A. Di Nola, A. D'Ubaldo and C. Lintas. 1993. Cellular and Molecular Biology, 39(6):583.
