Effect of high-hydrostatic pressure and pH treatments on the emulsification properties of gum arabic

Ma, F., Bell, A. E. and Davis, F. J. ORCID: https://orcid.org/0000-0003-0462-872X (2015) Effect of high-hydrostatic pressure and pH treatments on the emulsification properties of gum arabic. Food Chemistry, 184. pp. 114-121. ISSN 0308-8146 doi: 10.1016/j.foodchem.2015.03.075

Abstract/Summary

This study investigated the emulsification properties of the native gums and those treated at high pressure (800 MPa) both at their “natural” pH (4.49 and 4.58, respectively) and under “acidic and basic” pH (2.8 and 8.0) conditions. The emulsification behaviour of KLTA gum was found to be superior to that of the GCA gum. High pressure and pH treatment changed the emulsification properties of both gums. The acidic amino acids in gum arabic were shown to play an important role in their emulsification behaviour, and mechanisms of emulsification for the two gums were suggested to be different. The highly “branched” nature of the carbohydrate in GCA gum was also thought to be responsible for the “spreading” of droplet size distributions observed. Coomassie brilliant blue binding was used to indicate conformational changes in protein structure and Ellman’s assay was used to estimate any changes in levels of free thiols present.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/40142
Identification Number/DOI	10.1016/j.foodchem.2015.03.075
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
Publisher	Elsevier
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