The phase behaviour, flow behaviour, and interfacial properties of protein-polysaccharide aqueous two-phase systems with sugar

3528 14 21278 4 41942 document 21278 Portsch12PhD.pdf application/pdf 020a0e4bea4615666bb3d0ce5548dc01 MD5 4394282 2012-07-05 13:36:24 http://etheses.bham.ac.uk//id/eprint/3528/1/Portsch12PhD.pdf 3528 1 1 application/pdf application/pdf en public

Portsch12PhD.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/21284 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/21284 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/21284 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/21285 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/21285 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/21285 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/21286 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/21286 http://eprints.org/relation/hasIndexCodesVersion http://etheses.bham.ac.uk/id/document/21286 21284 2 41958 document 21284 small.png image/png 9a47303975a93b325abb1140f8b3301b MD5 4751 2012-07-05 13:49:34 http://etheses.bham.ac.uk//id/eprint/3528/2/small.png 3528 2 2 image/png thumbnail_small Thumbnail Documents conversion from application/pdf to thumbnail_small en public

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http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/21278 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/21278 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/21278 archive 4031 disk0/00/00/35/28 2012-07-05 13:49:29 2019-01-23 09:56:29 2012-07-05 13:49:29 thesis show 0 Pörtsch Asja Norton Ian Cox Philip William ftp://ubira.bham.ac.uk/eTheses/3528_Portsch/ University of Birmingham The phase behaviour, flow behaviour, and interfacial properties of protein-polysaccharide aqueous two-phase systems with sugar unpub TP 10col_ephy Phase equilibria; microstructure; viscometry; phase inversion; interfacial tension; galactomannans; sodium caseinate; sugars. The aim of this work is to better understand the structuring processes in low fat dairy emulsions. Model sodium caseinate-galactomannan aqueous two-phase systems (NaCAS-GM ATPS) differing in GM-type (locust bean gum (LBG), tara gum (TG), guar gum (GG), fenugreek gum (FG)) and added sugar (trehalose, sucrose, glucose and fructose) were studied by the phase-volume ratio method, rheooptics, and droplet retraction method on phase equilibria, flow behaviour and interfacial properties, respectively, at pH 5.8 and 20°C. The results revealed that the presence of sugar in concentrations 5-40 wt% resulted in an increase in cosolubility of the phases and a decrease in interfacial tension (σ). Sugar concentrations > 40 wt% decreased cosolubility. Based on the mannose:galactose ratio of GM and type of sugar (added in concentration 15 wt%) the best cosolubility and corresponding smallest σ was attributed to FG and trehalose, respectively. The flow of ATPS depended on quiescent microstructure, the shear and physical properties of the phases. In polysaccharide-continuous ATPS, the occurrence of a shear-induced phase inversion event was observed for 0- 20 wt% sugar. A further increase in sugar concentration >20 wt% was found to suppress this phenomenon due decreased viscosity ratio and formation of thread like structures in flow. 2012-07 2011-10 graduation eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. Unilever public 286 University of Birmingham School of Chemical Engineering d_ph na 2012-07 graduation