The effects of pregelatinized potato starch concentration (PSC) ranged from 0 to 5 wt% on the physical
stability, color, rheological, textural, and sensory properties of model salad dressings prepared with
2 wt% dried egg yolk (DEY) or sodium caseinate (SC) were explored. All dressings showed shear-thinning
behavior with yield stress. Raising PSC increased storage (G
) and loss (G) moduli decreasing loss tangent
(tan ı) and samples containing ≥3 wt% starch showed a weak gel-like (tan ı < 1) response. A generalized
Cox–Merz rule was applicable to indicate shear/strain sensitivity of the dressings structures. Rheological
characterization based on Bohlin’s parameters (A, z) was useful for distinguishing physical stability of
dressings made with different formulations. Changes in color were generally very small and mainly PSCdependent.
Correlation analyses revealed that sensory descriptors could be satisfactory modeled with
the appropriate instrumental data. Overall, the results proved that pregelatinized potato starch may be
suitable ingredient in low-fat dressings applications.
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