Surface composition of dairy powders observed by X-ray photoelectron spectroscopy and effects on their rehydration properties

Colloids and Surfaces. B, Biointerfaces
Claire GaianiSylvie Banon

Abstract

The surface composition of three dairy powders was investigated by X-ray photoelectron spectroscopy. These spray-dried casein powders were more or less enriched in hygroscopic material (lactose and/or minerals). The principal limitation of these high protein content powders is their poor rehydration ability. Consequently, information about surface composition is required in order to get a better understanding of rehydration behaviour (i.e. wetting time and time of rehydration). The obtained results indicate that the surface of the three powders was dominated by proteins. Lactose and minerals are marginal compounds at the surface whereas the surface coverage of fat was over represented. A correlation between the lactose surface content and the wetting time of the powders was found, but no relationship with the surface fat. Moreover, as the surface is partly depleted in minerals and lactose, it is concluded that these compounds are principally located in the bulk of the particle. Therefore this observation could be related with a wetting time of the powders only slightly affected by the addition of hygroscopic material whereas the time of rehydration was strongly improved; powder wetting being more affected by the surface composi...Continue Reading

References

Jun 15, 1994·Analytical Chemistry·N H Turner, J A Schreifels

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Citations

Jan 25, 2016·Colloids and Surfaces. B, Biointerfaces·Martin FoersterCordelia Selomulya
Apr 25, 2007·Journal of Pharmaceutical Sciences·Anthony J HickeyDimitris Papadopoulos
Jun 28, 2011·Colloids and Surfaces. B, Biointerfaces·Nan FuXiao Dong Chen
May 27, 2011·Colloids and Surfaces. B, Biointerfaces·I Murrieta-PazosJ Scher
Oct 9, 2009·Colloids and Surfaces. B, Biointerfaces·C GaianiJ Scher
Oct 12, 2011·Journal of the Science of Food and Agriculture·Kim N FyfeBhesh Bhandari
Jul 9, 2013·Colloids and Surfaces. B, Biointerfaces·I Murrieta-PazosC Gaiani
Mar 17, 2015·Journal of Dairy Science·Nurcan KocaFigen Kaymak-Ertekin
Dec 3, 2014·Colloids and Surfaces. B, Biointerfaces·Y NikolovaC Gaiani
Jan 13, 2017·Bioscience, Biotechnology, and Biochemistry·Thao M HoBhesh R Bhandari
Apr 2, 2008·Chemical & Pharmaceutical Bulletin·Vasanthakumar Sekar, Vijaya Raghavan Chellan
Jan 1, 2018·Comprehensive Reviews in Food Science and Food Safety·Denise Felix da SilvaAnni Bygvraa Hougaard
Feb 8, 2011·Journal of Agricultural and Food Chemistry·Moustafa SaadBernard Cuq

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