It is well known that storage modulus (G′) represents solid-like behaviour, whereas loss modulus (G″) symbolises liquid-like behaviour.
The damping factor (tan δ) is the ratio of G″ to G′. An amplitude sweep test was performed to detect the structural stability, strength, and dynamic yield point in the dough and to determine the Linear Viscoelastic Region (LVE) of the dough. The yield point is where G′ and G″ crossover and generally, a higher G′ and a lower tan δ suggest a more elastic and solid-like behaviour. At a strain of 4.61% which was a crossover point of G′ and G″ of WWF dough, tan δ of WWF, WWF plus 10% of SBH-T, and WWF plus 10% of SBH-C doughs were 1.06 ± 0.1, 1.13 ± 0.08, and 1.43 ± 0.12, respectively, suggesting that, under same strain, WWF plus SBH-T dough showed more liquid-like behaviour, followed by WWF plus SBH-C dough, and lastly WWF dough. This increase in liquid-like behaviour with DF content enhanced expansion of WWF dough during processing. The effect of fibre on dough viscoelastic properties, then, appears to increase dough elasticity to affect the water–flour ratio.
It is well known that storage modulus (G′) represents solid-like behaviour, whereas loss modulus (G″) symbolises liquid-like behaviour. The damping factor (tan δ) is the ratio of G″ to G′. An amplitude sweep test was performed to detect the structural stability, strength, and dynamic yield point in the dough and to determine the Linear Viscoelastic Region (LVE) of the dough. The yield point is where G′ and G″ crossover and generally, a higher G′ and a lower tan δ suggest a more elastic and solid-like behaviour. At a strain of 4.61% which was a crossover point of G′ and G″ of WWF dough, tan δ of WWF, WWF plus 10% of SBH-T, and WWF plus 10% of SBH-C doughs were 1.06 ± 0.1, 1.13 ± 0.08, and 1.43 ± 0.12, respectively, suggesting that, under same strain, WWF plus SBH-T dough showed more liquid-like behaviour, followed by WWF plus SBH-C dough, and lastly WWF dough. This increase in liquid-like behaviour with DF content enhanced expansion of WWF dough during processing. The effect of fibre on dough viscoelastic properties, then, appears to increase dough elasticity to affect the water–flour ratio.
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