在豆蛋白分离物中,无线电频率辅助减轻脱口味的形成
Elahe Sharifi1, José Villacís-Chiriboga1, Kubra Kahraman2
1Department of Life Sciences, Food and Nutrition Science, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
Food chemistry
|January 31, 2026
概括
优化的射频 (RF) 种子预处理有效地禁用脂氧酶 (LOX),并防止在豆蛋白分离过程中产生异味. 这种方法可以保持蛋白质产量,并通过稳定自由基来增强味道.
科学领域:
- 食品科学 食品科学 食品科学
- 蛋白质化学 蛋白质化学
- 食品加工 食品加工 食品加工
背景情况:
- 脂质氧化导致豆蛋白分离物中不良的挥发性化合物.
- 氧化酶 (LOX) 酶活性是脂质氧化的一个关键驱动因素.
- 湿分化是一种用于隔离豆蛋白的常见方法.
研究的目的:
- 评估无线电频率 (RF) 种子预处理,以减轻在豆蛋白分离过程中的脂质氧化和异味.
- 了解RF预处理如何影响脂质氧化和化合物的机制.
- 为了优化射频处理参数,以有效地使LOX失活,同时保持蛋白质产量.
主要方法:
- 豆种子经历了各种无线电频率 (RF) 处理.
- 测量了脂氧酶 (LOX) 活性,以评估不活化.
- 蛋白质产量是在湿分化后确定的.
- 分析了化合物含量和自由基稳定性.
- 挥发性非风味化合物被量化.
主要成果:
- 在110°C以上的射频处理>20分钟完全失活LOX,但蛋白质产量降低高达50%.
- 优化的射频参数在100°C以下实现了>90%的LOX无活化,保持了蛋白质产量.
- 适度的射频治疗 (∼75°C) 将LOX活性降低了80%,保留了化合物,并促进了有益的HODE-13形成.
- 强烈的射频处理 (∼85-95°C) 降解了抗氧化剂,增加了风味以外的化合物.
结论:
- 优化的射频预处理有效地限制了在豆蛋白分离期间的脂质氧化和异味形成.
- 该机制涉及联合的LOX无活化和中介激素稳定.
- 射频预处理为保持蛋白质产量和质量提供了比传统加热更好的替代方案.
相关概念视频
Frequency-dependent Selection
24.0K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
24.0K
What is a Frequency Distribution
27.2K
A frequency is the number of times a value of the data occurs. The sum of all the frequency values represents the total number of students included in the sample. It is commonly used to group data of quantitative types. Frequency distributions can be displayed in a table, histogram, line graph, dot plot, or pie chart, just to name a few. A histogram is a graphical representation of tabulated frequencies, shown as adjacent rectangles, erected over discrete intervals (bins), with an area equal to...
27.2K
Mean From a Frequency Distribution
22.6K
Sometimes, data gathered from an experiment on a large sample or population are organized into concise tables. In such cases, the frequency of the quantitative data set is plotted in the form of a table. Or else, the data values are grouped into the quantity’s intervals, which form classes, and their respective frequencies are known. That is, the data values are distributed over different categories or classes. This is known as frequency distribution.
When such a data set is encountered,...
When such a data set is encountered,...
22.6K
Formation of Species
45.1K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
45.1K
Solution Formation
37.6K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
This selective...
37.6K
Standard Enthalpy of Formation
49.2K
Enthalpy changes are typically tabulated for reactions in which both the reactants and products are at the same conditions. A standard state is a commonly accepted set of conditions used as a reference point for the determination of properties under other different conditions. For chemists, the IUPAC standard state refers to materials under a pressure of 1 bar and solutions at 1 M and does not specify a temperature. Many thermochemical tables list values with a standard state of 1 atm. Because...
49.2K


