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Visualisation of xanthan conformation by atomic force microscopy
Moffat, Jonathan Morris, Victor J. Al-Assaf, Saphwan Gunning, A. Patrick
Moffat, Jonathan
Morris, Victor J.
Al-Assaf, Saphwan
Gunning, A. Patrick
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Other Contributors
EPub Date
Publication Date
2016-04-20
Submitted Date
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Adobe PDF, 1.17 MB
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Abstract
Direct visual evidence obtained by atomic force microscopy demonstrates that when xanthan is adsorbed from aqueous solution onto the heterogeneously charged substrate mica, its helical conformation is distorted. Following adsorption it requires annealing for several hours to restore its ordered helical state. Once the helix state reforms, the AFM images obtained showed clear resolution of the periodicity with a value of 4.7 nm consistent with the previously predicted models. In addition, the images also reveal evidence that the helix is formed by a double strand, a clarification of an ambiguity of the xanthan ultrastructure that has been outstanding for many years.
Citation
Moffat, J., Morris, V. J., Al-Assaf, S., & Gunning, A. P. (2016). Visualisation of xanthan conformation by atomic force microscopy. Carbohydrate Polymers, 148, 380-389. doi:https://doi.org/10.1016/j.carbpol.2016.04.078
Publisher
Elsevier
Journal
Carbohydrate Polymers
Research Unit
DOI
10.1016/j.carbpol.2016.04.078
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
EISSN
1879-1344