Phase segregation of amylopectin and beta-lactoglobulin in aqueous system

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.

• Författare: Carla Quiroga; Björn Bergenståhl
• Avdelning/ar: Department of Food Technology, Engineering and Nutrition
• Publiceringsår: 2008
• Språk: Engelska
• Sidor: 151-159
• Publikation/Tidskrift/Serie: Carbohydrate Polymers
• Volym: 72
• Issue: 1
• Länkar: http://dx.doi.org/10.1016/j.carbpol.2007.07.041
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Food Engineering
• Nyckelord: amylopectin; beta-lactoglobulin; transform infrared spectroscopy; Fourier; polymer incompatibility; phase segregation; phase diagram
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0144-8617