title: Dynamic light scattering investigation of sodium caseinate and xanthan mixtures.
abstract: Aqueous solutions of sodium caseinate and xanthan at pH 7 and containing 0.1 M NaCl, and their mixtures were investigated using dynamic light scattering. Sodium caseinate solutions showed a bimodal distribution of relaxation rates; with the aggregate peak distribution predominating. Xanthan solutions showed a single distribution at low concentrations (< or =0.06 wt.%) and a bimodal distribution at higher concentrations. The sodium caseinate-xanthan mixture modes were independent of the total biopolymer concentration, and behaved as a superposition of sodium caseinate solution alone and xanthan solution alone. This indicates that there is no interaction between xanthan and sodium caseinate in the range of concentrations considered in this study.
authors.affiliation: Institute of Fundamental Sciences, Massey University, Private Bag 11 222, Palmerston North, New Zealand.
authors.forename: W
authors.initials: W
authors.lastname: Nash
authors.forename: D N
authors.initials: DN
authors.lastname: Pinder
authors.forename: Y
authors.initials: Y
authors.lastname: Hemar
authors.forename: H
authors.initials: H
authors.lastname: Singh
mesh_terms: D002364:Caseins / Q000737:chemistry* / Q000528:radiation effects; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D008027:Light; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000528:radiation effects; D012542:Scattering, Radiation; D012996:Solutions
chemical_list: D002364:Caseins; D007202:Indicators and Reagents; D011135:Polysaccharides, Bacterial; D012996:Solutions; C002563:xanthan gum