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  • Title: Interaction of barley β-d-glucan with wheat starch: Effect on the pasting and rheological properties.
    Author: Li Y, Zhu K, Guo X, Peng W, Zhou H.
    Journal: Int J Biol Macromol; 2016 Nov; 92():70-76. PubMed ID: 27370749.
    Abstract:
    In this study, the effects of barley β-d-glucan (BBG) on the pasting and rheological properties of wheat starch (WS) were studied. Rapid visco-analyzer (RVA) results showed that addition of BBG induced a significantly increase of pasting viscosities (p<0.05). Steady shear rheological measurements showed that BBG increased the consistency index (K, Pasn) and decreased the flow behavior index (n). Higher modulus (G', G″) and tan δ values were observed in dynamic viscoelasticity measurements, suggesting that the pastes were less solid-like in the presence of BBG. The median diameter of the pasted starch particles exhibited much larger than the control. The swelling power, the solubility and the amount of leached amylose increased with the increase of the BBG concentration. All the results demonstrated that BBG promoted the pasting process of WS granules, supporting that the interaction between WS and BBG could occur in the systems, which could also be confirmed by the scanning electron microscope observation.
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