Gums are integral ingredients in fluid foods used for controlling viscosity and mouthfeel. Advances in rheological instrumentations
permits enhanced evaluations of the viscoelastic properties of fluids. Rheological properties of twelve gum solutions were
investigated at concentrations of 0.05%, 0.1%, and 0.5%. The viscous (g00) and elastic (g00) components of the complex viscosity
g*, elastic yield stress, and tan d were measured as functions of oscillatory shear. Konjac exhibited the highest g0 and g00 components
among all gums at 0.5% and 50 s1. Gum Arabic, methylcellulose and pectin, exhibited the least g0 and no g00 component under the
same conditions. Konjac exhibited greatest elastic yield stress, whereas microcrystallinecellulose had the least. Modeling results
showed that rheological properties of CMC were characterized by an exponential relationship, whereas riota-carrageenan and xanthan
were described by a power type relationship. A substantial increase in tan d was observed for most 0.5% gums solutions at shear
rates beyond 10 s1, indicating a shift from a visco-elastic regime to a purely viscous one. For gums that showed substantial viscoelasticity,
peak tan d values ranged from 5.7 to 68.3.