Search:
Computing and Library Services - delivering an inspiring information environment

A novel approach to the determination of the pyruvate and acetate distribution in xanthan

Abbaszadeh, A., MacNaughtan, W., Lad, M., Morris, Gordon, Sworn, G., Janin, M. and Foster, T. J. (2015) A novel approach to the determination of the pyruvate and acetate distribution in xanthan. Food Hydrocolloids, 44. pp. 162-171. ISSN 0268-005X

This is the latest version of this item.

Metadata only available from this repository.

Abstract

The present work demonstrates a quantitative relation between the physical properties of the order disorder transition in xanthan, such as transition temperature and modulus, with the acetate and pyruvate content. Models have been constructed which reflect simple linear dependence of transition temperature and the logarithm of the modulus on acetate, pyruvate, xanthan and salt concentration. Biphasic transitions in xanthan detected using Differential Scanning Calorimetry (DSC) are proposed to reflect phases containing different acetate and pyruvate levels in each phase. The respective acetate and pyruvate contents in these phases have been estimated. 13C Cross Polarisation Magic Angle Spinning (CPMAS) Nuclear Magnetic Resonance measurements further suggest that the distribution of functional groups measured in solution is reflected in a distribution of environments in solid powders. This could take the form of heterogeneity along an indvidal chain (intra-chain heterogeneity) or uniform but different levels of functional groups in individual chains (inter-chain heterogeneity). Support for the intra-chain proposal or “blocky” distribution is provided by samples which have been reported to exhibit different transition temperatures despite having apparently the same overall acetate and pyruvate content. This is ascribed to the values of transition temperature being different along an individual chain.

Item Type: Article
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
Related URLs:
Depositing User: Gordon Morris
Date Deposited: 21 Oct 2014 13:04
Last Modified: 21 Oct 2014 13:04
URI: http://eprints.hud.ac.uk/id/eprint/22092

Available Versions of this Item

  • A novel approach to the determination of the pyruvate and acetate distribution in xanthan. (deposited 21 Oct 2014 13:04) [Currently Displayed]

Downloads

Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©