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相关概念视频

Phosphodiester Linkages01:01

Phosphodiester Linkages

109.8K
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
109.8K
Phosphoinositides and PIPs01:42

Phosphoinositides and PIPs

10.0K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
10.0K
Phosphorylation01:02

Phosphorylation

53.5K
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
53.5K
Nucleic Acid Structure01:25

Nucleic Acid Structure

8.3K
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
8.3K

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Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization
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- 双螺旋纳米丝带

Chuang Hou1,2,3, Huan Lu1, Yi Liu1

  • 1State Key Laboratory of Mechanics and Control for Aerospace Structures, Key Laboratory of Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Science advances
|December 17, 2025
PubMed
概括

研究人员开发了稳定的-双螺旋纳米丝带. 这些新型纳米结构在恶劣条件下表现出增强的稳定性和可调节的光学特性,用于先进的应用.

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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 固态物理 固态物理

背景情况:

  • 纳米带提供了可取的电子特性,但其稳定性不佳.
  • 低维材料需要稳定,以便在电子领域及其他领域的实际应用.

研究的目的:

  • 为了设计具有增强性能的稳定纳米结构.
  • 探索这些新型纳米丝带在功能设备中的潜力.

主要方法:

  • -双螺旋纳米丝带的合成.
  • 使用实验技术和理论分析进行表征.
  • 在各种条件下 (空气,水,酸) 研究结构稳定性.
  • 对可调的光学特性 (温度,厚度,极化) 的分析.

主要成果:

  • 在高达225°C的空气,水和酸性溶液中实现高结构稳定性.
  • 由环境和物理因素影响的可调节光学特性.
  • 使用纳米丝带开发了具有高效光热转换的自我愈合的水凝.

结论:

  • 辛特尔相形成,螺旋间相互作用和螺旋形状的协同效应确保了纳米丝带的稳定性.
  • 开发的纳米丝带为稳定活性低维材料提供了一个有前途的平台.
  • 突出了生物医学工程和量子技术的潜在应用.