Effect of heat-treated flour on the quality and storage stability of fresh noodles

The effects of heat-treated flour on the quality, water distribution, and molecular weight distribution of protein and volatile compounds in fresh noodles during storage were evaluated. Heat-treated wheat flour (HTWF) at 80 degrees C-100 degrees C for 30 min was used to prepare noodles (HTFN). Results showed that heat treatment improved the quality of the noodles during storage. Compared with the control samples, the HTFN samples had a lower total plate counts (TPCs), a lower mold and yeast counts (MYCs), and a more stable pH value during storage. Heat treatment provided fresh noodles with bright color and positive texture. Low-field nuclear magnetic resonance (LF-NMR) results indicated that heat treatment restricted water migration with high A(21) and minimal T-23 (less free water) in the HTFN samples. Heat treatment promoted the aggregation of protein molecules, further inducing a difference in the quality of noodles. Moreover, heat treatment decreased the relative concentrations of free radicals and improved the overall aroma profile.