Abstract
Steady and dynamic shear properties of grape molasses having varying levels of starch (5%, 7.5%, and 10%) have been determined at 60 °C, 70 °C, and 80 °C. The consistency coefficient (K) and apparent viscosity (η50) increased with the starch concentration and decreased with temperature. Similar behavior was also observed in storage modulus (G′), loss modulus (G″), complex modulus (G*), and complex viscosity (η*). The 5-hydroxymethylfurfural (HMF) content of mid-product mix decreased with the increase in the starch concentration. Hardness, gumminess, and chewiness values increased with the starch concentration and temperature. The HMF content of the final product increased with the increase in drying temperature and decreased as the starch concentration increased.
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