Evaluating Viscosity of Surimi Paste at Different Moisture Contents

• Published in: Applied Rheology
• Main Authors: Yoon Won B., Gunasekaran Sundaram, Park Jae W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: De Gruyter 2004
• Subjects: carreau model; cox-merz; dynamic viscosity; surimi; zero shear viscosity; Materials of engineering and construction. Mechanics of materials; TA401-492; Merz; alaska pollock; Alaska
• Online Access: https://doi.org/10.1515/arh-2004-0008; https://doaj.org/article/667474e288244d299e54ef454e2944d5

The steady and dynamic shear viscosity of fish muscle protein paste obtained from Alaska pollock surimi at 95%, 90%, 85%, 80%, and 75% of moisture contents were measured in the temperature range of 5°C to 20°C. To estimate the steady shear viscosity at high shear rate from dynamic shear viscosity, the modified Cox-Merz rule was applied by introducing a frequency shift factor. The concentration dependence of zero-shear viscosity showed power-law dependence with an exponent of 3.5, and the universal behavior of viscosity at different protein concentrations was observed by a introducing reduced variables. The Carreau model was applied to describe the shear- thinning behavior of the surimi paste, and the model parameters estimated empirically showed moisture content dependence. The viscous flow behavior was independent of temperature (5°C to 20°C), and addition of starch decreased the flow index and viscosity of the paste, compared to the pure surimi paste.