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相关概念视频

Cohesion01:07

Cohesion

51.9K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
51.9K
Intermolecular Forces03:13

Intermolecular Forces

57.6K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
57.6K
Conditions on Early Earth02:06

Conditions on Early Earth

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Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
89.6K
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

48.0K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
48.0K
Colloids03:22

Colloids

17.3K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.3K
Covalent Bonds01:08

Covalent Bonds

7.1K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
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相关实验视频

Updated: Jun 2, 2025

Author Spotlight: Developing Synthetic Cells from Programmable Amphiphilic DNA Nanostructures
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通过结结驱动的自适应性协同活体成为原细胞.

Donglei Wang1, Peiyu Zhang1, Qi-Zhi Zhong1

  • 1Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.

ACS applied materials & interfaces
|January 14, 2025
PubMed
概括
此摘要是机器生成的。

由聚乙烯糖醇和酸形成的由结合驱动的协体提供稳定,可调节的原细胞. 这些适应性协生物模仿细胞功能,并且在高盐条件下强壮.

关键词:
协类动物 协类通过气结合,形成了气结合.聚乙烯糖醇 (PEG) 是一种聚乙烯基醇.聚醇是一种多的化合物.原细胞原细胞.

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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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科学领域:

  • 生物材料科学 生物材料科学
  • 超分子化学 超分子化学
  • 合成生物学 合成生物学

背景情况:

  • 通过液-液相分离 (LLPS) 的凝聚是人工原细胞和模仿无膜有机体的关键.
  • 传统的协体依赖于静电相互作用,限制了它们在高离子强度 (>0.1M) 的稳定性.
  • 需要新的驱动力和组件,以使合成协体与自然器官的强度相匹配.

研究的目的:

  • 为了开发以结为驱动的适应性协体.
  • 为了研究这些新型协虫的液态相分离 (LLPS) 行为.
  • 探索它们作为原细胞和治疗交付中的潜力.

主要方法:

  • 聚乙烯糖醇 (PEG) 和酸 (TA) 的复合,形成协体.
  • 通过调整PEG和TA度和质量比,调整协同合性质.
  • 评估高离子强度溶液 (高达1M) 中的协体稳定性.
  • 评估原细胞模仿细胞行为,如新陈代谢,细胞和膜融合.

主要成果:

  • 从PEG和TA成功形成了由结合驱动的自适应性协体.
  • 证明可调节的LLPS行为,控制同体大小 (70nm到10μm) 和形态 (颗粒,空心囊).
  • 在离子度高达 1 M 的情况下达到高稳定性,超过了传统的协体.
  • 展示原细胞的能力,包括营养吸收,细胞和膜融合.

结论:

  • 开发了一个平台,用于合理设计由结合驱动的协体.
  • 在适应性协动物中实现可控制的尺寸和形态.
  • 突出了由于增强的稳定性和功能,在原细胞构造和治疗中潜在的应用.