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Evaluation Effects of Adding Different Resistant Starches on Firmness and Stickiness of Dough by NMR During Proofing

Roger Ruan

  Low field nuclear magnetic resonance (NMR) was used to study the effect of different contents and types of resistant starch (RS) on dough quality.Inverse recovery (IR) sequence was used to acquire the sample s NMR relaxation data during dough proofing.Firmness and stickiness were measured by a Texture Analyzer.An increasing trend of firmness and stickiness was observed as the content of resistant starch was increased in the dough.Added resistant starch had an important role in the more mobile fraction,which indicated poor water absorption of resistant starch granules.Data showed the appropriate different RS content of adding was 5%(g/g).From magnetic resonance image(MRI),the moisture migration and distribution were quite uniform after 1~2h proofing during proofing process.Data from this study can be used for the development of dough-based products containing RS.……