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The effect of structural features of gelatin on its thermodynamic compatibility with locust bean gum in aqueous media

Title
The effect of structural features of gelatin on its thermodynamic compatibility with locust bean gum in aqueous media
Type
Article in International Scientific Journal
Year
1999
Authors
Alves, MM
(Author)
Other
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Antonov, YA
(Author)
Other
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Maria do Pilar Gonçalves
(Author)
FEUP
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Journal
Title: Food HydrocolloidsImported from Authenticus Search for Journal Publications
Vol. 13
Pages: 157-166
ISSN: 0268-005X
Publisher: Elsevier
Other information
Authenticus ID: P-001-4ZC
Abstract (EN): Thermodynamic compatibility and phase equilibria in aqueous systems containing locust bean gum (LBG) and acid or alkaline gelatin samples with similar molecular weights (similar to 100 kD), but different isoelectric points (7.9 and 4.9 respectively) were studied. The effects of the state of gelatin molecules (molecular-dispersed and colloidal-dispersed (similar to 0.4 mu m)) and limited degradation of biopolymers on their incompatibility are investigated. Passing from partially degraded to molecular-dispersed and then to colloidal-dispersed gelatins results in a decrease of the total concentration in the threshold point (C-t*), and in increasing asymmetry of phase dia,srams. Compatibility of LEG with gelatins is minimal at low ionic strength (mu) and pH close to their isoelectric points. In the two-phase region, the degree of compatibility, determined by the phase diagrams, was dependent on pH and ionic strength of mixtures, as well as on ionogenic properties of the gelatins studied, varying according to the change of gelatin-solvent interaction.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 10
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