花聚醇的结构变化及其抗氧化能力作为温度增长的函数
1Department of Biology, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia.
Plants (Basel, Switzerland)
|April 26, 2025
概括
低温 (LT) 在西兰花微绿中增加了自由和化聚烯,而高温 (HT) 增加了糖化形式. 结构形式显著影响这些化合物比温度本身更大.
科学领域:
- 植物科学 植物科学
- 食品科学 食品科学 食品科学
- 生物化学 生化学
背景情况:
- 植物中的多化合物以自由,可溶性结合 (化,糖化) 和不可溶性结合的形式存在.
- 聚烯形式的度受植物发育,组织,水的可用性和制备方法的影响.
- 了解结构变异是优化植物性食品健康益处的关键.
研究的目的:
- 研究不同生长温度 (室内,高,低) 对西兰花微绿的多结构形式的影响.
- 分析温度如何影响自由,化,糖化和不溶性结合多的度.
- 在不同的温度条件下评估由此产生的抗氧化能力变化.
主要方法:
- 花微绿花在受控室温 (RT),高温 (HT) 和低温 (LT) 条件下生长.
- 用光谱光度和RP-HPLC分析来量化总 (TP) 和它们的结构形式.
- 使用ABTS和FRAP测定来评估抗氧化剂潜力,并通过PCA和等级分类等统计分析来补充.
主要成果:
- 在所有温度下,化聚类是主要形式,LT显著增加了自由和化可溶性TP.
- HT显著增加了TP,黄和酸的糖基化形式,同时减少了与不溶性结合的色素.
- LT增强了各种化合物的自由和化形式,LT和HT都不同地影响了抗氧化能力,而化形式显示了最高的能力.
结论:
- 生长温度显著改变了花微绿中的多醇的结构形式和抗氧化能力.
- 低温 (LT) 建议最大限度地增加自由和雌性聚烯,而高温 (HT) 则增强了糖化形式.
- 结构形式,特别是化多类,在抗氧化活性中起到的作用比生长温度更重要.
相关概念视频
02:45Responses to Heat and Cold Stress
13.5K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.5K
02:11Effects of Temperature on Free Energy
21.9K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
21.9K
02:28Effect of Temperature Change on Reaction Rate
4.5K
The Arrhenius equation,
4.5K
01:20Radical Autoxidation
2.5K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.5K
01:27Factors Influencing Microbial Growth: Temperature
2.3K
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
2.3K
01:23Physical Methods for Controlling Microbial Growth: Temperature
1.7K
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
1.7K