[HTML][HTML] Effect of temperature on dynamic and steady-state shear rheological properties of siriguela (Spondias purpurea L.) pulp

PED Augusto, M Cristianini, A Ibarz - Journal of Food Engineering, 2012 - Elsevier
Journal of Food Engineering, 2012Elsevier
The present work has evaluated the dynamic and steady-state shear rheological properties
of siriguela (Spondias purpurea) pulp as function of temperature (0–80° C), as well as the
applicability of the Cox-Merz rule. The product flow behavior could be well described by the
Herschel–Bulkley's model (R2> 0.98), whose parameters were modeled as function of
temperature (R2> 0.91). The product has shown a weak gel behavior, with storage modulus
higher than loss modulus in the evaluated frequency range. The storage and loss modules …
The present work has evaluated the dynamic and steady-state shear rheological properties of siriguela (Spondias purpurea) pulp as function of temperature (0–80°C), as well as the applicability of the Cox-Merz rule. The product flow behavior could be well described by the Herschel–Bulkley’s model (R2>0.98), whose parameters were modeled as function of temperature (R2>0.91). The product has shown a weak gel behavior, with storage modulus higher than loss modulus in the evaluated frequency range. The storage and loss modules could be well described by a power function of the oscillatory frequency (R2>0.93), whose parameters were modeled as function of temperature (R2>0.97). Moreover, a power modified Cox-Merz rule could describe the rheological properties of S. purpurea pulp (R2>0.96). The obtained data are potentially useful for future studies on food properties and process design.
Elsevier
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