Steady and dynamic shear rheological behavior of semi dilute Alyssum homolocarpum seed gum solutions: influence of concentration, temperature and heating-cooling rate

Journal of the Science of Food and Agriculture
Behzad AlaeddiniBabak Ghanbarzadeh

Abstract

Alyssum homolocarpum seed gum (AHSG) solution exhibits high viscosity at low shear rates and has anionic features. However there is no information regarding the flow and dynamic properties of this gum in semi-dilute solutions. The present study aimed to investigate the dynamic and steady shear behavior of AHSG in the semi-dilute region. The viscosity profile demonestrated a shear thinning behavior at all temperatures and concentrations. An increase in the AHSG concentration was acompanied by an increase in the pseudoplasticity degree, whereas, by increasing the temperature, the pseudoplasticity of AHSG decreased. At low gum concentration, solutions had more viscosity dependence on temperature. The mechanical spectra obtained from the frequency sweep experiment demonstrated viscoelastic properties for gum solutions. AHSG solutions showed typical weak gel-like behavior, revealing G' greater than G' within the experimental range of frequency (Hz), with slight frequency dependency. The influence of temperature on viscoelastic properties of AHSG solutions was studied during both heating (5-85 °C) and cooling (85-5 °C) processes. The complex viscosity of AHSG was greater compared to the apparent viscosity, indicating the disruption o...Continue Reading

References

Mar 12, 2011·International Journal of Biological Macromolecules·M J N ChandrasekarM J Nanjan
Aug 31, 2014·Food Chemistry·Yanbei WuQiang He
Aug 19, 2015·International Journal of Biological Macromolecules·M A HesarinejadA Koocheki
Oct 6, 2015·International Journal of Biological Macromolecules·Morteza FathiArash Koocheki

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Citations

Aug 2, 2018·International Journal of Biological Macromolecules·Davoud Salarbashi, Mohsen Tafaghodi

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