Title : ( Influence of temperature, mono- and divalent cations on dilutesolution properties of sage seed gum )
Authors: Alireza Yousefi , Seyed Mohammad Ali Razavi , shahla khodabakhsh ,Access to full-text not allowed by authors
Abstract
The functional properties of food hydrocolloids are remarkably affected by the quality of solvent/cosolutes and temperature in a food system. In this paper, dilute solution properties of sage seed gum (SSG) as a function of salt type (NaCl, KCl, MgCl2 & CaCl2), salt concentration (10, 50, 100 & 200 mM) and temperature (25, 45 & 65˚C) were investigated. Among various models, Higiro model showed a higher performance to determine intrinsic viscosity of SSG at all temperatures and cosolutes. From 25 to 65˚C for every 20˚C rise in temperature, intrinsic viscosity decreased about 18.99 and 63.86%, respectively. The divalent cations had more reduction effect on intrinsic viscosity than monovalet cations. More flexibility of SSG in monovalent salts solutions compared with divalent ones was observed. A high value for activation energy (2.53×107J/kgmol) and chain flexibility (3046.45) of SSG was obtained, which was higher than many hydrocolloids. The shape factor of SSG macromolecules at 25-65˚C was an oblate or prolate and for all used cosolutes, the shape was roughly found to be ellipsoidal.
Keywords
Hydrocolloid; chain flexibility; chain stiffness; intrinsic viscosity; salt; temperature@article{paperid:1041072,
author = {Yousefi, Alireza and Razavi, Seyed Mohammad Ali and Khodabakhsh, Shahla},
title = {Influence of temperature, mono- and divalent cations on dilutesolution properties of sage seed gum},
journal = {International Journal of Biological Macromolecules},
year = {2014},
volume = {67},
number = {6},
month = {June},
issn = {0141-8130},
pages = {246--253},
numpages = {7},
keywords = {Hydrocolloid; chain flexibility; chain stiffness; intrinsic viscosity; salt; temperature},
}
%0 Journal Article
%T Influence of temperature, mono- and divalent cations on dilutesolution properties of sage seed gum
%A Yousefi, Alireza
%A Razavi, Seyed Mohammad Ali
%A Khodabakhsh, Shahla
%J International Journal of Biological Macromolecules
%@ 0141-8130
%D 2014