Role of substituents on the properties of some polysaccharides

Biomacromolecules
M Rinaudo

Abstract

This paper concerns the influence of the chemical structure on the physical properties of some polysaccharides. Especially, we proposed to discuss the role of the substituents on these properties. In some cases, non-carbohydrate substituents play a minor role on rheological properties in the presence of a salt excess as shown on xanthan and succinoglycan. The rheology of aqueous solution of these stereoregular polysaccharides is controlled by the conformation (helical conformation) whose stability is not largely influenced by these substituents. On the other hand, the interaction between galactomannan and xanthan depends on the presence of acetyl substituents on xanthan but also on the xanthan conformation. However, for polymers such as gellan, XM-6 or BEC 1615, complete deacetylation induces the ability to form physical gels in given thermodynamic conditions. The presence of carbohydrate substituents or short side chains was also examined. Especially in the gellan family, the role of position of substitution (position 3 on the glucose unit C or position 6 on the A glucose) was presented. It is concluded that the substituents giving the higher stability for the helical conformation (higher DeltaH and Tm values) also cause a low...Continue Reading

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Citations

May 29, 2008·Applied Microbiology and Biotechnology·Arsenio M FialhoIsabel Sá-Correia
Apr 3, 2007·Applied and Environmental Microbiology·Jan A C VriezenK Nüsslein
Jul 9, 2011·Journal of Biotechnology·Cristiana A V TorresMaria A M Reis
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Feb 27, 2021·International Journal of Biological Macromolecules·Ming ZhaoHong Xu
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Jan 10, 2006·Biomacromolecules·Herje SchagerlöfFolke Tjerneld

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