振荡磁场 (OMF) 对氧化铁纳米粒子 (IONP) agar模型系统超冷行为的影响
Amanda Joya1, Dongyoung Lee2, Taiyoung Kang3
1Department of Human Nutrition, Food, and Animal Sciences, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA.
Journal of food science
|January 20, 2025
概括
振荡磁场 (OMF) 通过使用铁氧化物纳米粒子 (IONP) 增强食品超冷稳定性. 这种磁性纳米粒子相互作用抑制了冰核形成,在冷过程中保持了食品的质量.
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.
- 物理 物理学 物理
背景情况:
- 冷食物可以保存食物,但会损坏冰晶,降低质量.
- 振荡磁场 (OMF) 辅助超冷是一种有前途的方法来防止这种情况.
- 需要进一步研究OMF辅助超冷的精确机制和有效性.
研究的目的:
- 研究OMF对食品模型系统超冷行为的影响.
- 评估铁氧化物纳米粒子 (IONP) 在OMF辅助超冷中的作用.
- 探索OMF和IONP在改善食品冷质量的潜力.
主要方法:
- 准备了一个基于亚格的食品模型系统,IONPs的度各不相同.
- 样品在-24小时内在-8°C下被置于振荡磁场 (10mT,10Hz) 中.
- 测量并比较含有IONP,含纳米粒子 (ZNP) 和对照样本之间的超冷却概率.
主要成果:
- 与对照组 (60%) 相比,含有IONP的样本显示了显著更高的超冷概率 (75-90%) .
- 使用3,6和12毫克/100毫升IONP的样本分别实现了75%,75%和90%的超冷却.
- 纳米粒子样本表现出较低的超冷却概率 (55%),表明磁效应的特异性.
结论:
- 在含有IONP的食品模型系统中,OMF显著提高了超冷稳定性.
- OMF和IONP之间的相互作用似乎抑制了冰核形成,可能是通过磁力机械对水分子的影响.
- 这种技术有可能通过防止结构损坏来改善冷期间的食品质量保存.
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