期刊
FOOD RESEARCH INTERNATIONAL
卷 103, 期 -, 页码 156-162出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foodres.2017.10.023
关键词
Rheological properties; Structural properties; Disulfide bond; Starch-gluten interactions; Water mobility
资金
- Public Welfare Industry (Agriculture) Research Project: Research and Demonstration of Key Technology System of Potato Staple Food [201503001-2]
- Central Public-interest Scientific Institution Basal Research Fund: Research and Application of Tailored Flour for Potato Staple Foods [Y2016PT21]
Wheat, corn, tapioca, sweet potato and potato starches were independently mixed into starch-gluten model doughs containing 15% (w/w) vital gluten. Rheological properties, including linear viscoelasticity region, frequency dependence and recovery capacity, were studied by strain sweep, frequency sweep, and creep and recovery measurements. Structural properties were also investigated by measuring the disulfide bonds (-SS-) content, SDS-PAGE and low-resolution H-1 nuclear magnetic resonance. Wheat starch (WS)-gluten dough had the greatest linear viscoelasticity region (0.190%), lowest frequency dependence (0.128) and greatest recovery capacity (67.39%), while potato starch-gluten dough had the smallest linear viscoelasticity region (0.126%), greatest frequency dependence (0.195) and lowest recovery capacity (54.97%). Furthermore, WS-gluten dough showed the highest disulfide bonds (-SS-) content (3.47 mu mol/g), lowest intensity of extracted glutenin bands and highest bond water content (23.20%). This suggested that WS-gluten dough formed stronger starch-gluten interactions compared with those of the other four starch-gluten model doughs.
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