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Rheological properties of matrix-particle gellan gum gel: effects of calcium chloride on the matrix

Authors
Journal
Food Hydrocolloids
0268-005X
Publisher
Elsevier
Publication Date
Volume
17
Issue
5
Identifiers
DOI: 10.1016/s0268-005x(03)00010-9
Keywords
  • Gellan Gum
  • Matrix Gel
  • Particle Gel
  • Breaking Property
  • Storage Young'S Modulus

Abstract

Abstract The effects of particle gel (PG) on the rheological properties of gellan gum gels were investigated. Samples were 1.2% gellan gum gels with 5 mM CaCl 2 (MG-CaCl 2) or without CaCl 2 (MG), to which various amounts a particle gel of 1.2% gellan gum containing 5 mM CaCl 2 (PG-CaCl 2) was added. Breaking stress and storage Young's modulus of MG containing PG-CaCl 2 increased with increased PG-CaCl 2 content, while those of MG-CaCl 2 containing PG-CaCl 2 decreased. PG-CaCl 2 behaved as an active filler in MG and as an inactive filler in MG-CaCl 2. Activation of PG-CaCl 2 may be the result of interaction between calcium ions in the particles and carboxyl groups in the gellan gum molecules of the matrix.

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