Improvement of pasting and gelling behaviors of waxy maize starch by partial gelatinization and freeze-thawing treatment with xanthan gum
| Autor: | Jian-Ya Qian, Qiaoquan Liu, Seung-Taik Lim, Zhi-Juan Wang, Chen Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Starch
Amylopectin Polysaccharides Bacterial food and beverages Aqueous dispersion General Medicine Freeze thawing Zea mays Maize starch Analytical Chemistry chemistry.chemical_compound Crystallinity Viscosity chemistry medicine Thermal stability Food science Gels Xanthan gum Food Science medicine.drug |
| Zdroj: | Food chemistry. 375 |
| ISSN: | 1873-7072 |
| Popis: | To improve the pasting and gelling behaviors of waxy maize starch, an aqueous dispersion with or without xanthan gum was subjected to partial gelatinization (5 ℃ above the onset melting temperature of starch) and freeze-thawing treatment. After the treatments, starch granules were slightly deformed, with partial loss of birefringence, and tended to aggregate. The relative crystallinity and thermal stability of waxy maize starch crystals decreased by the treatments. These changes indicated that the treatment affected the inner structure and chain arrangement of the granules. The treated waxy maize starches, however, showed a higher overall pasting viscosity with shorter and more cohesive pastes than that of the native starch. The treated starches formed rigid gels with increased stability against freeze-thawing. The addition of small amounts of xanthan gum enhanced the effects of the treatments. |
| Databáze: | OpenAIRE |
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