基于分子和超分子结构的高水静压处理下不同粉的物理化学特性变化的机制理解
Xinyu Zhang1, Chao Wang1, Yiqing Zhu1
1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China; National Center of Technology Innovation (Deep Processing of Highland Barley) in Food Industry, China.
Food chemistry
|October 3, 2024
概括
高液压压处理改变了米粉的结构,影响了物理化学特性. 这种方法提高了粉的凝化,粘度和硬度,用于新型产品的开发.
科学领域:
- 食品科学 食品科学 食品科学
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
背景情况:
- 粉是食品中的关键成分,在日本和类品种之间表现出明显的分子和超分子结构.
- 了解外部力量如何影响粉结构对于优化食品加工和产品质量至关重要.
研究的目的:
- 研究高水静压 (HHP) 对日本和米粉的分子和超分子结构的影响.
- 为了将结构变化与物理化学性质的变化相关联,包括粘接,质和纹理特征.
- 探索HHP处理的潜力,以开发功能性粉成分.
主要方法:
- 日本和米粉在不同时间内受到高水静压 (450MPa).
- 分析了分子和超分子结构,使用敏感于层状组织 (无形和晶体) 的技术.
- 评估了物理化学性质,包括粘贴行为,质和质地.
主要成果:
- 高粉处理诱导了日本和米粉的结构变化差异,特别是影响了叶片厚度和稳定性.
- 日本粉显示无形片厚度增加,随后结构崩,而粉显示在突然崩之前,结晶片厚度增加.
- 在HHP处理后10-15分钟内,粘合,质和纹理特性显著改善.
- 开始的凝化温度和度下降,表明凝化增强.
结论:
- 高粉处理改变了粉的超分子结构,导致物理化学性质的改变.
- 观察到的变化表明HHP可以用于为特定应用量身定制粉特性.
- 用HHP处理的粉显示出创造减少胀,更容易凝化,提高粘度和硬度的食品的潜力.
相关概念视频
Hydrolysis
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Responses to Heat and Cold Stress
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.
Plastic Behavior
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.
Transformation of Plane Stress
Studying stress transformation is essential in understanding how stress components within a material, like a cube under plane stress, change with rotation. This change is analyzed by considering a prismatic element within the cube. As the element rotates, the stress components acting on it—both normal and shearing stresses—change in magnitude and orientation. This change is quantified using trigonometric functions of the rotation angle, relating the forces acting on the rotated element's faces...
Osmotic Pressure
Osmosis is a process where solvent molecules move toward a solution through a semipermeable membrane. As the solution dilutes due to the entry of solvent, it expands. This expansion increases the hydrostatic pressure of the solution. When the hydrostatic pressure equals the osmotic pressure, osmosis stops.Osmotic pressure, denoted by Π, is the minimum pressure needed to prevent the solvent from passing into the solution by osmosis. The van 't Hoff equation calculates the osmotic pressure of an...


