相关实验视频
Updated: Jun 13, 2025

00:05
Preparation of High-Quality Fermented Fish Product
Published on: August 23, 2019
10.3K
蛋白质氧化对鱼肉凝结构和乳化特性的影响
Wanjun Xu1, Yulong Bao1, Yue Zhou1
1School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
Food research international (Ottawa, Ont.)
|September 14, 2024
概括
用过氧化 (H2O2) 氧化鱼类凝会通过增加疏水性和减少结构而改变其乳化特性. 这增强了乳化活性,但由于滴滴聚合,稳定性降低.
科学领域:
- 食品科学与技术 食品科学与技术
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
背景情况:
- 鱼类凝是一种有价值的生物聚合物,具有多种应用,包括食品乳化.
- 了解氧化等加工因素如何影响凝的功能性质对于优化其使用至关重要.
研究的目的:
- 为了研究过氧化 (H2O2) 诱导氧化对鱼类凝的物理化学和乳化特性的影响.
- 阐明在乳化活性和稳定性观察到的变化背后的机制.
主要方法:
- 用不同度的H2O2 (0-30mM) 来氧化鱼类凝.
- 分析了氨基酸组成,二次结构,三环含量,泽塔潜力,粒子大小,表面水性和水接触角度的变化.
- 评估了氧化凝的乳化活性和稳定性.
主要成果:
- 氧化降低了氨基酸含量 (甘氨酸,氨酸,氨酸) 和有序结构 (二级,三环螺旋).
- 氧化增加了粒子大小,表面水性和水接触角度,同时降低了泽塔潜力.
- 氧化凝显示出增强的乳化活性 (较小的液滴,减少的界面张力),但降低了乳化稳定性 (增加的花和聚合).
结论:
- 氧化增加了鱼类凝的疏水性,并破坏了其三环螺旋结构,减少了界面张力,促进了吸附,以获得更好的乳化活性.
- 然而,降低的静电排斥和溶液粘度导致滴滴聚合,损害了乳化稳定性.
- 控制氧化提供了一种潜在的策略,可以为特定的乳化应用量身定制鱼类凝.
相关概念视频
Protein Denaturation
4.0K
The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
4.0K
Protein and Protein Structure
79.1K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
79.1K
Protein Folding
117.7K
Overview
117.7K

