在加工富含的茶叶过程中,对自由甲基单半氨酸的损失进行初步探索
Jue Liu1, Youjun Hu2, Jie Zheng1
1Department of Food Science and Engineering, Jinan University, Guangzhou 510632, Guangdong, China.
Food chemistry
|May 4, 2025
概括
茶中的甲基类固醇 (SeMC) 在加工过程中是不稳定的. 保护和酶酶显著减少SeMC损失,保持其营养益处并促进富含的食品生产.
科学领域:
- 食品科学 食品科学 食品科学
- 营养生物化学 营养生物化学
- 农业化学 农业化学
背景情况:
- 甲基氨基 (SeMC) 是茶中的主要有机,具有抗氧化作用等营养益处.
- 了解茶叶加工过程中的SeMC稳定性对于最大限度地提高其健康益处至关重要.
研究的目的:
- 调查SeMC在茶叶加工各个阶段的稳定性.
- 确定减少SeMC降解和保持其生物活性的方法.
- 探索氧化SeMC (SeMCO) 回归SeMC的再生过程.
主要方法:
- 在不同的加工条件下评估SeMC损失 (高温固定,在25°C下滚动).
- 分析降解动力学和激活能量 (Ea).
- 评估保护和催化酶在防止SeMC氧化的有效性.
- 调查SeMCO再生为SeMC的潜力.
主要成果:
- 高温固定导致显著的SeMC损失 (48.11%),而在25°C滚动导致较少的损失 (25.54%).
- 保护在150°C时大幅降低了降解率,降低到10%以下.
- 显著的29.19%的氧化SeMC (SeMCO) 在25°C时再生为SeMC.
- catalase与相结合,有效抑制了氧化,从而缩短了加工时间.
结论:
- 茶叶加工对SeMC的稳定性产生重大影响,热量是降解的主要因素.
- 覆盖和酶处理 (catalase) 是保护SeMC的有效策略.
- SeMCO到SeMC的再生挑战了以前的假设,并为保留提供了新的途径.
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