4.7 Article

Effect of Lactylated Gluten and Freeze-Thaw Cycles on Frozen Dough: From Water State and Microstructure

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FOODS
卷 12, 期 19, 页码 -

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MDPI
DOI: 10.3390/foods12193607

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lactylated gluten; freeze-thaw tolerance; steamed bread

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The influence of lactylated gluten and freeze-thaw cycles on the water state, microstructure, and quality of frozen steamed bread dough was investigated. The study found that lactylated gluten increased the specific volume and texture properties of steamed bread, as well as enhanced the viscoelasticity of frozen dough. The lactylated gluten also reduced water mobility and increased protein network connection points, improving the freeze-thaw tolerance of the dough.
The influence of lactylated gluten and Freeze-Thaw Cycles on the water state, microstructure, and quality of frozen steamed bread dough was investigated. After three freeze-thaw cycles (3F/T), the specific volume of steamed bread with sodium lactate-treated gluten increased by 18.34% compared with the blank group and 5.73% compared with the wheat gluten (WG) group. Compared with wheat gluten, the texture properties of steamed bread with lactylated gluten increased significantly. Changes in rheological properties demonstrated that the frozen dough's viscoelasticity increased significantly. The lactylated gluten could reduce water mobility and decrease the content of freezable water in frozen dough. Moreover, the free sulfhydryl (SH) content increased, revealing that the protein was depolymerized. Based on the microstructure and corresponding protein network analysis (PNA), the total area and the number of protein network connection points of the dough adding lactylated gluten were significantly higher than those of the blank group and the WG group. In conclusion, lactylated gluten enhanced the freeze-thaw tolerance of frozen dough.

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