Rheowin data manager v 3

The amplitude in shear stress τ was increased from 0.01 to 100 Pa with a constant frequency of 1 Hz with the purpose of evaluating gel strength. Oscillation frequency tests were performed from 0.01 to 10 Hz at a constant shear stress of 0.5 Pa to be within the linear viscoelastic region to determine the related variation in storage modulus (G′) and loss modulus (G“) at 32 °C. Both viscoelastic moduli are defined as follows [Eqs. (1), (2)]: ${\displaystyle G{}^{\text{'}}=\frac{\tau {}_0}{\gamma {}_0\cos \delta }}$
${\displaystyle G^{\text{'}\text{'}}=\frac{\tau {}_0}{\gamma {}_0\sin \delta }}$
in which τ₀ and γ₀ are the amplitudes of stress and strain, respectively, and δ is the phase shift between them. The software Haake RheoWin Job Manager V.3.3 and RheoWin Data Manager V.3.3 (Thermo Electron Corporation, Karlsruhe, Germany) were used to perform the test and analysis of the obtained data, respectively.