大米粉的高水静压和热凝化之间的水分差异
Xinyu Zhang1, Qun Shen1, Luman Sang1
1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China; National Center of Technology Innovation (Deep Processing of Highland Barley) in Food Industry, China.
Carbohydrate polymers
|November 19, 2024
概括
高水压凝化粉 (HHGS) 与热凝化粉 (HGS) 相比,具有更好的水分分布和结构完整性. 在不同程度的凝化 (DG) 中,HHGS保持了分散的颗粒和稳定的热性能.
科学领域:
- 食品科学与技术 食品科学与技术
- 材料科学 是一种材料科学.
- 生物物理学的生物物理.
背景情况:
- 了解粉凝化对于食品加工和材料应用至关重要.
- 不同的凝化方法 (高水静压与热) 显著影响粉的结构和特性.
- 研究水的分布和结构变化为粉水化和稳定性提供了洞察力.
研究的目的:
- 为了比较水分分布和结构变化,高水压凝米粉 (HHGS) 和热凝米粉 (HGS) 在不同程度的凝化 (DG).
- 阐明水化对液晶聚合物包装,螺旋线圈过渡,有序结构和热性质的影响.
- 确定不同的凝化方法如何影响粉颗粒分散和粉溶解.
主要方法:
- 低场核磁共振 (LF-NMR) 用于分析水的分布和分子的移动性 (T2值).
- 差分扫描热量计 (DSC) 用于评估热性质,如凝化温度.
- 微观分析 (暗示"马耳他十字"观察) 用于观察粉颗粒的结构变化.
主要成果:
- 完全水化,以减少状结构尺寸和马耳他十字架的消失为特征,发生在HGS较HHGS较低的DG.
- LF-NMR显示,随着DG的增加,水分子透到HHGS中更紧的结构中,T2在DG75%达到最低,而HGS在DG25%达到最低.
- HHGS 呈现出有限的晶状层崩,颗粒膨胀和粉素漏,导致更多的颗粒分散,并保持初始凝化温度 (To) 和广泛的 DSC 峰值.
结论:
- 高水压凝化 (HHGS) 导致较稳定的粉结构,与热凝化粉 (HGS) 相比,具有更好的水和颗粒分散.
- 在更广泛的凝度范围内,HHGS更有效地保留了有序结构和热特性.
- 这些发现表明,HHGS对于需要控制水和基于粉材料的结构稳定性的应用是一个有前途的替代方案.
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