Objective This study aimed to investigate the effects of enzymatic hydrolysis after baking treatment on the physicochemical properties and structure of a millet-lentil flour blend. Method Millet and lentil bean flour were used as raw materials. The changes in the main components, micromorphology, starch crystal,and protein secondary structure of three mixed flours, including raw grain, baked grain, and enzymatically hydrolyzed after baking,were studied. Result The results showed that compared to raw grain,the moisture and starch content of baked grain decreased. However, protein, ether extract, WSI, WAI,and gelatinization enthalpy were significantly increased after enzymatic hydrolysis (P<0.05).The surface of baked grain was rough and porous, and D[4,3] increased,while D[4,3] decreased after enzymatic hydrolysis.Baking L* value decreased, but a* and b* values increased. Only a* value increased after enzymatic hydrolysis.After baking, the short-range order degree of starch increased, and the crystal shape of starch did not change.After enzymatic hydrolysis,the short-range order degree of starch decreased,and the starch crystal was destroyed.The contents of α-helix and β-corner increased after baking.After enzymolysis,α-helixand irregular curl were reduced.The suspension of baked and enzymatically hydrolyzed samples were pseudoplastic fluids,and the loss angle tan value decreased,indicating weakened fluidity. Conclusion Baking and enzymatic hydrolysis after baking reduced the fluidity of the millet-lentil flour blend.These findings could provide reference for the processing of millet and lentil flour blending products.
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