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Energetics of Solution Formation02:35

Energetics of Solution Formation

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The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
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Sublimation01:03

Sublimation

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Sublimation is the direct transformation of a solid to a gaseous state. For instance, at standard pressure and room temperature, solid carbon dioxide sublimes to gaseous carbon dioxide. The phase diagram depicts the conditions required for sublimation. This process occurs at the solid-gas phase boundary and is not observed above the triple point of the substance. The reverse of sublimation is called deposition, where a gaseous substance condenses directly into a solid. Sublimation and...
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Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis02:29

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

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Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
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Solvents01:12

Solvents

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A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
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Physical Properties of Ethers02:17

Physical Properties of Ethers

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Overview
An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of alcohols of comparable molecular weight and slightly higher than those of hydrocarbons of comparable molecular weight (Table 1).
Ethers can act as hydrogen bond acceptors, making them more water-soluble than hydrocarbons, but since ethers cannot act as hydrogen bond donors, they are much less soluble in water than alcohols. Ethers are considered...
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Solubility03:00

Solubility

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Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
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深度环氧溶剂:在宏分子物质中的合成,分类,特性和应用.

Yuying Gao1, Min Fan1, Xiaoxiao Cheng1

  • 1College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Engineering Research Center of Food Thermal-Processing Technology, Shanghai Ocean University, Shanghai 201306, China.

International journal of biological macromolecules
|August 10, 2024
PubMed
概括

深度浸泡溶剂 (DES) 提供可持续的,低毒性的替代品,用于提取食物大分子,如奇托和点. 本次审查强调了它们在食品加工和材料制备方面的潜力.

关键词:
深层欧性溶剂 深层欧性溶剂宏分子应用 宏分子应用物理化学特性 物理化学特性

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科学领域:

  • 绿色化学是一种绿色化学.
  • 食品科学 食品科学 食品科学
  • 宏分子化学 宏分子化学

背景情况:

  • 深度环氧溶剂 (DES) 正因其可持续性和低毒性而受到越来越多的关注.
  • 它们的独特特性,包括低挥发性和热稳定性,比传统有机溶剂具有优势.
  • 目前对食品应用中的DES的研究主要集中在小分子上,对宏分子应用的探索有限.

研究的目的:

  • 审查DES的合成,分类和特性.
  • 总结 DES 在食品工业中用于提取和加工宏分子物质的应用.
  • 分析DES在食品科学中的优势,局限性和未来前景.

主要方法:

  • 关于DES合成,特性和在食品科学中的应用的文献综述.
  • 专注于使用DES提取食品大分子 (例如,奇托,pectin) 的研究.
  • 基于DES制备的大分子基板薄膜的分析.

主要成果:

  • 对于提取食物大分子,如酸盐和pectin,DES是有效的.
  • DES可以用于制备宏分子基板薄膜.
  • 尽管存在局限性,但DES对食品应用具有有利的特性.

结论:

  • 对于食品大分子的可持续提取和加工,DES显示出显著的前景.
  • 需要进一步的研究,以充分探索DES在食品工业中的潜力和克服其局限性.
  • 对于各种与食品相关的应用,DES代表了一个可行的绿色替代方案.