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Analytical Ultracentrifugation VI pp 64–69Cite as

Determination of thermodynamic properties of sodium alginate from bacteria and seaweeds in aqueous solutions

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Part of the book series: Progress in Colloid and Polymer Science ((PROGCOLLOID,volume 119))

Abstract

Alginates are biopolymers produced by seaweeds as well as by some bacteria like Pseudomonas aeruginosa or Azotobacter vinelandii. They consist of copolymers containing 1,4-β-d-mannuronate and its 5-epimer α-l-guluronate. Their composition and physical properties depend on the source of the alginate. Different alginates from seaweeds and bacteria have been investigated using analytical ultracentrifugation. The samples were prepared in sodium chloride solution to suppress charge effects of the polymers. From the concentration gradient in equilibrium centrifugation the molar masses and the second virial coefficient are derived. The results obtained by this method are in good agreement with the results of light scattering measurements. The properties of different alginates are compared and discussed.

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Authors and Affiliations

  1. Institut für Physikalische und Theoretische Chemie der Gerhard-Mercator, Universität Duisburg, 47048, Duisburg, Germany

    A. Straatmann & W. Borchard

Authors
  1. A. Straatmann
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  2. W. Borchard
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W. Borchard A. Straatmann

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© 2002 Springer-Verlag

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Straatmann, A., Borchard, W. (2002). Determination of thermodynamic properties of sodium alginate from bacteria and seaweeds in aqueous solutions. In: Borchard, W., Straatmann, A. (eds) Analytical Ultracentrifugation VI. Progress in Colloid and Polymer Science, vol 119. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44672-9_10

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  • DOI: https://doi.org/10.1007/3-540-44672-9_10

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-42489-5

  • Online ISBN: 978-3-540-44672-9

  • eBook Packages: Springer Book Archive

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