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関連する概念動画

Polymers02:34

Polymers

40.9K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
40.9K
Polymers02:34

Polymers

23.3K
23.3K
DNA Replication02:40

DNA Replication

59.3K
DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied.  After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
Replication in Prokaryotes
DNA replication...
59.3K
Dynamic Equilibrium02:20

Dynamic Equilibrium

62.7K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
62.7K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

3.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.8K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

4.0K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.0K

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関連する実験動画

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DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
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DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

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ダイナミック・アンド・レスポンシブ・DNAのようなポリマー

Sudheendran Mavila1, Brady T Worrell1, Heidi R Culver1

  • 1Department of Chemical and Biological Engineering , University of Colorado-Boulder , Boulder , Colorado 80309 , United States.

Journal of the American Chemical Society
|October 24, 2018
PubMed
まとめ
この要約は機械生成です。

研究者らは,リング開封ポリメリゼーション (ROP) のための新しいチオラクトンモノマーを合成した. これらのポリマーは,チオール-チオエステル交換によって動的な再配置を可能にし,制御されたポリマー合成を可能にします.

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In situ Photo-rheology Monitors Viscoelastic Changes in Photo-responsive Polymer Networks
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関連する実験動画

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科学分野:

  • ポリマー化学
  • 有機合成
  • 材料科学

背景:

  • 核酸類は様々な用途で不可欠である.
  • リング開封ポリメリゼーション (ROP) は,多用途のポリメリゼーション技術である.
  • ポリマーの合成は依然として大きな課題です

研究 の 目的:

  • 天然の核酸を真似した新型のチオラクトン単体を作る.
  • これらのモノメアのリング開封ポリメリゼーション (ROP) を調査する.
  • 制御された合成のために生成されたポリマーのダイナミックな再配置能力を探求する.

主な方法:

  • ニュクレオシドを模倣するように設計されたチオラクトン単体合成.
  • これらのモノマーを用いた強固なリング開封ポリメリゼーション (ROP) の実行.
  • ポリマー分解とポリマー凝結を含むチオール-チオエステル交換によるダイナミックなポリマー再配置の実証.

主要な成果:

  • ティオラクトン単体合成に成功
  • ロバスト・リング・オープニング・ポリメリゼーション (ROP) で,チオエステル機能群を持つポリマーが得られる.
  • 異なる特性を持つポリマーのデポリメリゼーションと融合を含む,ダイナミックなポリマーの再配置の実現可能性が実証されています.

結論:

  • 開発されたチオラクトンモノマーとROPプロセスは,ダイナミックなポリマーの作成を可能にします.
  • チオール-チオエステル交換は,ポリマーの再配置と制御された合成のためのメカニズムを提供します.
  • この研究は,配列制御されたポリマーの常時合成を可能にするプラットフォームの基礎を築いています.