earticle

영어

Synergistic interactions between xanthan (X) and carob (C) were investigated by studying the linear viscoelasticbehavior of X, C, and X/C mixtures at sol and gel states. At the solution state, storage modulus (G') dominates the linearviscoelastic properties of X/C mixtures. The gelation temperature (52 to 57oC) was weakly dependent on the xanthan fraction(φX) in the mixture. The φX also had a strong effect on G’ until φX=0.5. The elastic active network concentration (EANC) ofX/C gels was estimated from the pseudo-equilibrium modulus. The EANC for systems with φX=0.25, 0.5, 0.75, and 1 at 1%total concentration was 2.3, 4.4, 4.1, and 0.32 (×10–3 mol/m3), respectively. The maximum synergistic effect was observed atabout φX=0.5. The G' at the transition state of X/C mixed gel was proportional to ω3/2 at ω>ωtr (the onset transition frequency)compared to the theoretical limit of ω1/2.