Determination of thermodynamic properties of sodium alginate from bacteria and seaweeds in aqueous solutions
作者： A. Straatmann , W. Borchard
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摘要: Alginates are biopolymers produced by seaweeds as well 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 physical properties depend on the source alginate. Different alginates from have been investigated using analytical ultracentrifugation. The samples were prepared in sodium chloride solution to suppress charge effects polymers. From concentration gradient equilibrium centrifugation molar masses second virial coefficient derived. results obtained this method good agreement with light scattering measurements. different compared discussed.
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