This study investigated the influence of five mill streams on the freeze-thaw (FT) stability of dough and steamed bread quality. The 1M2 stream (1st reduction) exhibited the longest stability time (7.24 min), maximum dough height (36.1 mm), and the highest specific volume (1.93 mL/g) of steamed bread. The 1S stream (1st sizing) had the highest water-extractable arabinoxylan content (0.62 %), which contributed to frozen dough stability and maintained a high specific volume (1.85 mL/g) throughout FT treatment. In contrast, the 3M stream (3rd reduction) showed the shortest stability time (5.83 min) and lowest specific volume (1.39 mL/g). Protein subunit and rheological analyses revealed that higher gliadin content in the 1M2 and 1S streams promoted dough extensibility, facilitating expansion during fermentation and steaming. These results demonstrate the key role of mill stream characteristics in determining dough FT stability and provide valuable insights for the use of specific mill streams in frozen dough.
Xiaojuan Guo,Taotao Dai,Mingshun Chen,Lizhen Deng,Jun Chen,Chengmei Liu
The performance of purple corn flour (PCF) with various size pulverized by low temperature impact mill (LTIM) in making steamed bread was investigated. Results indicated that decreased diameter of PCF showed richer red with increased a * (4.43–7.34), stronger adhesiveness (0.04–2.25 N s), more appropriate hardness (15.20–48.30 N), lower water fluidity (T 2 , ranged from 19.05 to 14.12 ms), and more cross-linking structure to purple corn dough (PCD). PCD texture characteristics were significantly affected by starch network and filler-like effect of dietary fiber based on the additional adding dietary fiber to starch. Steamed bread made by finer size PCF (56 μm) exhibited favorable quality supported by smooth skin, regular shape, porous structure, appropriate texture properties and low starch digestibility, which was mainly due to the higher α-amylase inhibitory activity of dietary fiber. These results confirmed that using PCF prepared by LTIM could be a suitable option to get good-quality whole grain food.
危险品化学品经营许可证（带存储）