4.7 Article

Isolation of novel wheat bran antifreeze polysaccharides and the cryoprotective effect on frozen dough quality

期刊

FOOD HYDROCOLLOIDS
卷 125, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2021.107446

关键词

Wheat bran; Antifreeze polysaccharides; Frozen dough; Ice crystal; Yeast viability; Gluten proteins

资金

  1. Outstanding Youth Science Fund Project of Natural Science Foundation of Jiangsu Province [BK20211576]
  2. National Natural Science Foundation of China [31801550]
  3. China Postdoctoral Science Foundation [2018M630564]
  4. Key Technology Research and Development Program of Jiangsu Province [BE2019364]
  5. Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions

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The study compared the characteristics of different wheat bran antifreeze polysaccharides (WBAP) and found that WBAP with enriched arabinoxylan showed superior effect on inhibiting ice recrystallization, improving the quality of frozen dough, and preserving yeast viability and dough structure.
Different wheat bran antifreeze polysaccharides (WBAP) were first isolated by ice shell separation method. The composition and antifreeze activity of varied WBAP were characterized and their cryoprotective effects on frozen dough were comprehensively studied with the emphasis on ice crystals, yeast and gluten proteins. WBAP with enriched arabinoxylan (AX) of high arabinofuranose/xylopyranose ratio (A/X) showed superior effect on inhibiting ice recrystallization compared with WBAP with low A/X. WBAP could significantly improve the quality of frozen dough steamed bread, and the effect coincided with antifreeze activity. WBAP effectively inhibited the ice recrystallization and altered the shape of ice crystal from cubic to lamellate in frozen dough, consequently better preserving the yeast viability and dough structure. WBAP alleviated the depolymerization of glutenin macropolymers, and was conductive in developing more homogeneous and less distorted gluten network structures in frozen dough. The current study can provide a theoretical basis for the exploitation of WBAP as a technofunctional improver for frozen dough.

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