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Phase segregation of amylopectin and beta-lactoglobulin in aqueous system

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Author

Summary, in English

Phase behavior of aqueous amylopectin and beta-lactoglobulin system was studied using Fourier transform infrared spectroscopy. Polysaccharide-protein mixtures were prepared at different concentrations and left for equilibration; afterwards their spectra were recorded and correlated using Partial Least Square analysis. Tertiary phase diagrams were built for the system at different equilibration times (2 and 6 weeks); the binodals were asymmetric and displayed toward the protein concentration. In the two-phase region of the phase diagrams the mixtures showed an upper layer rich in beta-lactoglobulin and a lower layer rich in retrograded amylopectin, and in some cases an intermediate layer was seen which was a metastable phase.

Department/s

  • Department of Food Technology, Engineering and Nutrition

Publishing year

2008

Language

English

Pages

151-159

Publication/Series

Carbohydrate Polymers

Volume

72

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Food Engineering

Keywords

  • amylopectin
  • beta-lactoglobulin
  • transform infrared spectroscopy
  • Fourier
  • polymer incompatibility
  • phase segregation
  • phase diagram

Status

Published

ISBN/ISSN/Other

  • ISSN: 0144-8617