Rheological Properties of Sweetened Sesame Paste Formulated with Bovine Blood Plasma

Abstract

Abstract-The aim of this study was to evaluate the rheological properties of a paste formulated with sesame (Sesamum indicum L.), syrup and bovine blood plasma. An experimental design under a multifactorial structure 2×2×4 and middle fraction to rule out effects of similar treatment was used. Factors (with their respective levels) were: sesame paste content (80 % and 70 %), syrup content (20 % and 30 %) and bovine blood plasma content (0.75 %, 1.00 %, 1.25 % and 1.50 %). A total of 8 formulations with three replicates for each treatment were done. A pseudoplastic behavior for all studied samples was observed, typical of emulsions or suspensions. The paste exhibited predominating semi-solidlike behavior (elastic modulus, G′ > viscous modulus, G″). This paste could be used in bakery products, with the purpose to improve their nutritional quality.Keyword-Viscoelastic properties, elastic modulus (G′), viscous modulus (G″), apparent viscosity, tangent of the phase angle (tan δ)