European Food Research and Technology

, Volume 234, Issue 2, pp 305–313

Rheological characterization and activation energy values of binary mixtures of gellan

  • Rafael Emilio González-Cuello
  • Emma Gloria Ramos-Ramírez
  • Alfredo Cruz-Orea
  • Juan Alfredo Salazar-Montoya
Original Paper

DOI: 10.1007/s00217-011-1626-2

Cite this article as:
González-Cuello, R.E., Ramos-Ramírez, E.G., Cruz-Orea, A. et al. Eur Food Res Technol (2012) 234: 305. doi:10.1007/s00217-011-1626-2

Abstract

The present study determined the flow behavior and activation energy of high (HA) and low (LA) acyl gellan dispersions (0.2%) and their mixtures as a function of preparation temperature (25 and 90 °C) and of the presence or absence of Ca2+ (30 mM). Heated gellan mixtures containing calcium were acidified with δ-gluconolactone to obtain gels and determine linear viscoelasticity using the Kelvin–Voigt model. The studied dispersions showed non-Newtonian shear-thinning behavior. HA dispersions (with and without Ca2+) showed the highest activation energy values, 88.60 and 51.18 kJ/mol. Whereas, LA dispersions showed the lowest activation energy values, 3.73 and 9.19 kJ/mol. With respect to the rheological studies, it was observed that the relationships between HA and LA gellan did not affect the recovery percentages because similar values were obtained (86.90–90.00%), and this behavior along with the mean viscosity values obtained in the gel mixtures could indicate that the hydrogen bond formation between both gellan helix (HA, LA) is possible. These results can contribute to possible industrial applications of gellans in the development of new alimentary products.

Keywords

High and low acyl gellanViscoelasticityKelvin–Voigt modelActivation energy

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Rafael Emilio González-Cuello
    • 1
  • Emma Gloria Ramos-Ramírez
    • 1
  • Alfredo Cruz-Orea
    • 2
  • Juan Alfredo Salazar-Montoya
    • 1
  1. 1.Department of Biotechnology and BioengineeringCINVESTAV-IPNDF, MéxicoMexico
  2. 2.Department of PhysicsCINVESTAV-IPNDF, MéxicoMexico