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The sol-gel transition of gellan gum aqueous solutions in the presence of various metal salts

  • Y. Yuguchi
  • H. Urakawa
  • S. Kitamura
  • I. Wataoka
  • K. Kajiwara
Conference paper
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 114)

Abstract

Gellan gum undergoes gelation by forming domains composed of associated double helices. Gellan gum aqueous solutions were prepared with or without adding various metal salts, and their gel-sol transitions were observed by small-angle X-ray scattering (SAXS) and differential scanning calorimetry (DSC). The SAXS results are analyzed in terms of the molecular models of associated double helices, and the DSC endo-thermic peaks are attributed to the possible dissociation processes of the domains formed upon gelation. The mechanism of the gel-sol transition is discussed from the view point of the role of metal cations.

Key words

Small-angle X-ray scattering Gellan gum Gel structure Differential scanning calorimetry 

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References

  1. 1.
    Jansson P, Lindberg Sandford PA (1983) Carbohydr Res 124: 135–139CrossRefGoogle Scholar
  2. 2.
    Crescenzi V, Dentini M, Dea ICM (1986) Carbohydr Res 114: 181–191Google Scholar
  3. 3.
    Yuguchi Y, Mimura M, Urakawa H, Kitamura S, Ohno S, Kajiwara K (1996) Carbohydr Polym 30: 83–93CrossRefGoogle Scholar
  4. 4.
    Yuguchi Y, Urakawa H, Kajiwara K (1997) Macromol Symp 120: 77–89Google Scholar
  5. 5.
    Chandrasekaran R, Puigjaner LC, Joyce KL, Arnott S (1988) Carbohydr Res 181: 23–40CrossRefGoogle Scholar
  6. 6.
    Carroll V, Chilvers GR, Franklin D, Miles M, Morris VJ, Ring SG (1983) Carbohydr Res 114: 181–191CrossRefGoogle Scholar
  7. 7.
    Grasdalen H, Smidsrød O (1987) Carbohydr Polym 7: 371–393CrossRefGoogle Scholar
  8. 8.
    Milas M, Shi X, Rinaudo M (1990) Biopolymers 30: 451–164CrossRefGoogle Scholar
  9. 9.
    Annaka M, Honda J, Seki H, Nakahira T, Yokita M, Miyamoto K, Komai T (1998) Proceedings of the 4th International Conference on Hydrocolloids. Osaka Japan p 106Google Scholar
  10. 10.
    Tsutsumi A, Ozawa T, Okada M, Hiraoka T (1998) Proceedings of the 4th International Conference on Hydrocolloids. Osaka Japan p 110Google Scholar
  11. 11.
    Kratky O, Glatter O (eds) (1982) Small-angle X-ray scattering. Academic Press, LondonGoogle Scholar
  12. 12.
    Shimode M, Mimura M, Urakawa H, Yamanaka S, Kajiwara K (1996) Sen’i Gakkaishi 52: 301–309Google Scholar
  13. 13.
    Guenet J-M (1992) Thermoreversible gelation of polymers and biopolymers. Academic Press, LondonGoogle Scholar
  14. 14.
    Coviello T, Maeda H, Yuguchi Y, Urakawa H, Kajiwara K, Dentini M, Crescenzi V (1998) Macromolecules 31: 1602–1607CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Y. Yuguchi
    • 1
  • H. Urakawa
    • 1
  • S. Kitamura
    • 2
  • I. Wataoka
    • 1
  • K. Kajiwara
    • 1
  1. 1.Faculty of Engineering and DesignKyoto Institute of TechnologyMatsugasakiJapan
  2. 2.Department of Biological Resource ChemistryKyoto Prefectural UniversityShimogamoJapan

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