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Correlation between arabinose content and the conformation of arabinoxylan in water dispersions

Janewithayapun, Ratchawit ; Cousin, Fabrice ; de Moura Pereira, Pamela Freire ; Herranz-Trillo, Fátima LU ; Terry, Ann E. LU ; Pedersen, Jan Skov ; Jiménez-Quero, Amparo and Ström, Anna (2025) In Carbohydrate Polymers 368.
Abstract

Arabinoxylan (AX) with varying arabinose to xylose (A/X) ratios of 0.85, 0.57 and 0.39 was extracted from wheat bran, and the conformations of the AX polysaccharides dispersed in water were investigated using small-angle X-ray scattering. The persistence length (Lp) and the conformation statistics (expressed by the Flory exponent v or the mass fractal) of the AX varied with their A/X ratios. The Lp decreased with decreasing A/X ratio, from 4.5 nm to 1.5 nm, where the AX with high and intermediate A/X ratios can be considered semi-flexible chains, while AX with the lowest A/X ratio behaves as a flexible chain. The mass fractal increased from 1.7 to 2.5 between the highest and lowest A/X ratios, indicating... (More)

Arabinoxylan (AX) with varying arabinose to xylose (A/X) ratios of 0.85, 0.57 and 0.39 was extracted from wheat bran, and the conformations of the AX polysaccharides dispersed in water were investigated using small-angle X-ray scattering. The persistence length (Lp) and the conformation statistics (expressed by the Flory exponent v or the mass fractal) of the AX varied with their A/X ratios. The Lp decreased with decreasing A/X ratio, from 4.5 nm to 1.5 nm, where the AX with high and intermediate A/X ratios can be considered semi-flexible chains, while AX with the lowest A/X ratio behaves as a flexible chain. The mass fractal increased from 1.7 to 2.5 between the highest and lowest A/X ratios, indicating increasingly compact polymer conformations. AX with the highest A/X ratio behaved as chains in a good solvent and was well dispersed even in the semi-dilute regime. AX with intermediate and low A/X ratios showed stronger tendencies to aggregate and were not well dispersed at higher concentrations. The results presented show that the macroscopic properties of AX dispersions can be understood based on the chemical composition and fine structure of the AX polysaccharide.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Intrinsic viscosity, Linkage analysis, Monosaccharide analysis, NMR, Wheat bran
in
Carbohydrate Polymers
volume
368
article number
124082
publisher
Elsevier
external identifiers
  • pmid:40947242
  • scopus:105012280232
ISSN
0144-8617
DOI
10.1016/j.carbpol.2025.124082
language
English
LU publication?
yes
id
1a2c556d-7caf-42d4-ae1d-f7e988e37450
date added to LUP
2025-10-29 10:39:36
date last changed
2025-10-29 10:40:31
@article{1a2c556d-7caf-42d4-ae1d-f7e988e37450,
  abstract     = {{<p>Arabinoxylan (AX) with varying arabinose to xylose (A/X) ratios of 0.85, 0.57 and 0.39 was extracted from wheat bran, and the conformations of the AX polysaccharides dispersed in water were investigated using small-angle X-ray scattering. The persistence length (L<sub>p</sub>) and the conformation statistics (expressed by the Flory exponent v or the mass fractal) of the AX varied with their A/X ratios. The L<sub>p</sub> decreased with decreasing A/X ratio, from 4.5 nm to 1.5 nm, where the AX with high and intermediate A/X ratios can be considered semi-flexible chains, while AX with the lowest A/X ratio behaves as a flexible chain. The mass fractal increased from 1.7 to 2.5 between the highest and lowest A/X ratios, indicating increasingly compact polymer conformations. AX with the highest A/X ratio behaved as chains in a good solvent and was well dispersed even in the semi-dilute regime. AX with intermediate and low A/X ratios showed stronger tendencies to aggregate and were not well dispersed at higher concentrations. The results presented show that the macroscopic properties of AX dispersions can be understood based on the chemical composition and fine structure of the AX polysaccharide.</p>}},
  author       = {{Janewithayapun, Ratchawit and Cousin, Fabrice and de Moura Pereira, Pamela Freire and Herranz-Trillo, Fátima and Terry, Ann E. and Pedersen, Jan Skov and Jiménez-Quero, Amparo and Ström, Anna}},
  issn         = {{0144-8617}},
  keywords     = {{Intrinsic viscosity; Linkage analysis; Monosaccharide analysis; NMR; Wheat bran}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Carbohydrate Polymers}},
  title        = {{Correlation between arabinose content and the conformation of arabinoxylan in water dispersions}},
  url          = {{http://dx.doi.org/10.1016/j.carbpol.2025.124082}},
  doi          = {{10.1016/j.carbpol.2025.124082}},
  volume       = {{368}},
  year         = {{2025}},
}