在除臭过程中通过[1,5]和[1,3]的西格马特罗普重新排列来异构化多可萨赫萨酸:密度函数理论的视角
Linshang Zhang1, Zimu Li1, Hui Wang2
1College of Food Science and Engineering, Henan University of Technology, Zhengzhou, Henan, China.
Journal of food science
|July 5, 2025
概括
优化藻类油除臭可以最大限度地减少多可萨赫萨酸 (DHA) 的损失. 保持温度在190°C以下,加工时间在70分钟以下,可以保持宝贵的DHA含量.
科学领域:
- 食品化学 食品化学
- 有机化学 有机化学
- 生物技术是生物技术.
背景情况:
- 多可萨赫萨酸 (DHA) 是一种重要的omega-3脂肪酸. 在藻类油的工业化除臭过程中,其损失是一个重大问题.
- DHA的异构导致其降解,影响藻类油的营养质量.
研究的目的:
- 优化藻类油的除臭参数,以最大限度地减少DHA损失.
- 在除臭过程中研究DHA异构的机制.
主要方法:
- 脱臭参数 (温度和持续时间) 的实验室规模优化.
- 使用红外光谱和核磁共振分析结合的三烯和二烯形成.
- 使用密度函数理论进行计算建模,以阐明反应路径.
主要成果:
- 确定了最佳除臭条件:温度不超过190°C,持续时间不超过70分钟.
- 结合三烯和二烯的形成得到证实,表明DHA的异构化.
- 密度函数理论的计算显示,DHA异构化中的[1,5]西格马特罗普再排列比[1,3]西格马特罗普再排列更容易.
结论:
- 该研究为藻类油行业提供了实际指导,以减少加工过程中的DHA损失.
- 了解DHA异构化的机制有助于开发改进的炼制技术.
- 保持特定的温度和时间参数对于在藻类油中保存DHA至关重要.
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