超过:工艺温度 (7°C和50°C) 对工艺性能和蛋白质饮料物理,化学和感官性能的影响
T Truong1, A J Hernandez1, D M Barbano2
1Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research, Center, North Carolina State University, Raleigh, NC 27695.
Journal of dairy science
|July 21, 2024
概括
脱脂牛奶的超过和透过有效地去除乳糖,产生一种平淡的,白色的,无乳糖的产品. 在50°C的加工速度比在7°C更快,因为流速更高.
科学领域:
- 乳制品科学 乳制品科学
- 食品加工技术 食品加工技术
- 生物化学工程 生物化学工程
背景情况:
- 脱脂牛奶加工旨在为各种应用而修改成分.
- 乳糖去除对于乳糖不耐受的消费者和特定产品配方至关重要.
- 超过 (UF) 和透过 (DF) 是牛奶成分修改的关键技术.
研究的目的:
- 研究UF加工温度 (7°C与50°C相比) 对脱脂牛奶的影响.
- 为了评估乳糖去除效率,矿物分离和保留性质.
- 评估后续热处理 (HTST 杀菌,自闭塞) 对用 UF 处理的脱脂牛奶的影响.
主要方法:
- 脱脂牛奶在7°C和50°C的温度下接受了UF和DF,以达到>98%的乳糖去除.
- 在DF期间,通过添加脱离离子化水来保持恒定的蛋白质度.
- 然后使用HTST巴氏杀菌或自闭塞进行热处理.
- 分析了物理,化学和感官特性.
主要成果:
- 实现了98-99%的乳糖去除,其水与牛奶的比例约为4:1.
- 由于更高的流量 (48比23公斤/米2/小时),UF在50°C的速度是7°C的两倍.
- 无乳糖脱脂牛奶在感觉上比原生脱脂牛奶更软,更白,更不稳热.
- 结点显著下降,pH值增加.
结论:
- 与DF结合的UF有效地产生具有改变感官和物理性质的无乳糖脱脂牛奶.
- 更高的加工温度 (50°C) 提高了UF的效率,减少了加工时间.
- 无乳糖脱脂牛奶表现出增加的白度和降低的热稳定性,需要仔细考虑下游应用.
更多相关视频
相关概念视频
Detergent Purification of Membrane Proteins
5.2K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
5.2K
Turbulent Flow: Problem Solving
109
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
109
Protein Denaturation
4.1K
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...
4.1K


