脂肪酸成分在低温储存期间对巴氏消毒牛奶的挥发性化合物的影响
Haixia Yan1, Wei Huang2, Xin Zhao3
1The College of Food Science, Shenyang Agricultural University, Shenyang, China.
Food research international (Ottawa, Ont.)
|September 14, 2024
概括
牛奶脂肪在储存期间的变化会影响味道. 关键的挥发性化合物,如2-hexenal二聚合物和酸乙烯在全脂牛奶中增加,与和多不和脂肪酸氧化有关.
科学领域:
- 食品科学与技术 食品科学与技术
- 乳制品化学 乳制品化学
- 感官分析 感官分析
背景情况:
- 牛奶的脂肪成分在储存期间显著影响牛奶的味道.
- 了解挥发性化合物形成对于控制牛奶风味至关重要.
研究的目的:
- 为了研究脂肪酸成分对牛奶风味的影响.
- 为了确定影响储存期间牛奶风味变化的关键挥发性化合物.
主要方法:
- 在4°C保存的巴氏消化全脂牛奶 (PWM) 和巴氏消化脱脂牛奶 (PSM) 中对挥发性化合物的分析.
- 气色谱-质谱 (GC-MS) 用于挥发性化合物的识别.
- 脂肪酸概况和挥发性化合物之间的相关性分析.
主要成果:
- 检测到33种挥发性化合物,其中子,和化物是最丰富的.
- 在PWM中,关键的差异性挥发性化合物 (2-hexenal二聚合物,乙酸乙烯,布坦醇) 的含量更高.
- 在储存期间,和脂肪酸 (SFA) 和多不和脂肪酸 (PUFA) 减少,而单不和脂肪酸在PWM中增加.
- 脂肪酸C18:2和C16:0与关键的挥发性化合物有很强的关联.
结论:
- SFA和PUFA的氧化对牛奶中挥发性化合物形成有显著的贡献.
- 特定脂肪酸 (C18:2,C16:0) 是关键的风味相关挥发性化合物的前体.
- 这些发现提供了关于牛奶风味形成途径的见解.
相关概念视频
Physical Properties of Carboxylic Acids
4.8K
Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
4.8K
Membrane Fluidity
151.6K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
151.6K
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview
17.9K
The Fischer esterification reaction was developed by the German chemist Emil Fischer in 1895. It is a condensation reaction between carboxylic acids and alcohols in an acidic medium to give esters and water.
17.9K
Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives
1.9K
Just like β-keto acids—which upon thermal decarboxylation form ketones—β-dicarboxylic acids undergo decarboxylation to generate monocarboxylic acids with the liberation of carbon dioxide.
1.9K
Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids
3.1K
Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.
3.1K
Distillation: Vapor–Liquid Equilibria
2.7K
Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
2.7K


