在粉面中的温度介导的凝质感转化:相对于玻璃过渡温度Tg"
Hongxiao Liu1,2, Qing Hu1,2, Sha Yang2
1College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
Gels (Basel, Switzerland)
|August 28, 2025
概括
在其玻璃过渡温度 (Tg) 附近冷马粉 (PSN) 优化了质地. 在-3°C冷的面条显示出增强的硬度,凝聚力和理想的微观结构,改善了冷食品的加工.
科学领域:
- 食品科学
- 材料科学
- 物理化学
背景情况:
- 马粉是亚洲的无质食品,主要是高度的粉凝.
- 粉凝的质地受到冷等加工条件的显著影响.
- 了解结温度的影响,特别是在玻璃过渡温度 (Tg) 周围,对于优化PSN质量至关重要.
研究的目的:
- 研究结温度对土豆粉面条 (PSN) 的质感和微观结构的影响.
- 确定最佳的结温度范围,特别是与玻璃过渡温度 (Tg) 相比,以保持PSN质量.
- 阐明冷过程中PSN结构变化的机制.
主要方法:
- 确定新鲜PSN的点 (-1°C),超冷温度 (-4.5°C) 和玻璃过渡温度 (Tg", -3.1°C).
- 在不同温度下系统地结PSN,重点关注Tg'范围.
- 在冷后分析PSN质地 (硬度,粘性,弹性,凝聚性,性,弹性) 和微观结构.
主要成果:
- 结显著改变了PSN的质地,降低了粘度,增加了硬度.
- 在 -3°C (最接近 Tg) 处冷的面条表现出最佳的纹理特性:最高硬度 (14,065.77 g),弹性 (0.98),凝聚力 (0.93),可性 (11,971.06) 和弹性 (0.84),粘度最小.
- 在Tg'附近结的PSN显示出优异的纹理,连续的固体截面和密集的表面,这归因于粉的反向转化,高粉链流动性和较小的冰晶.
- 在-3°C冷24小时后,得到最紧和最理想的质地.
结论:
- 在结过程中,玻璃过渡温度 (Tg) 在粉凝的纹理形成中起着关键作用.
- 在接近其Tg"的温度下结PSN可显著提高其纹理质量和微观结构完整性.
- 这些发现为优化粉凝食品的冷加工提供了宝贵的见解.
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