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.
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© 1999 Springer-Verlag
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Yuguchi, Y., Urakawa, H., Kitamura, S., Wataoka, I., Kajiwara, K. (1999). The sol-gel transition of gellan gum aqueous solutions in the presence of various metal salts. In: Nishinari, K. (eds) Physical Chemistry and Industrial Application of Gellan Gum. Progress in Colloid and Polymer Science, vol 114. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48349-7_7
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DOI: https://doi.org/10.1007/3-540-48349-7_7
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