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関連する概念動画

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...

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関連する実験動画

Updated: Jun 11, 2026

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

コア・シェル・ヒドロゲルナノ粒子における調節可能な腫れ動力学.

D Gan1, L A Lyon

  • 1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.

Journal of the American Chemical Society
|August 2, 2001
PubMed
まとめ
この要約は機械生成です。

コアシェルのポリ-N-イソプロピラクリラミド (p-NIPAm) ナノ粒子は調節可能な性質を示しています. シェルを修正する.

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Nanosponge Tunability in Size and Crosslinking Density

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Last Updated: Jun 11, 2026

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

Nanosponge Tunability in Size and Crosslinking Density
11:15

Nanosponge Tunability in Size and Crosslinking Density

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Injection of Porcine Adipose Tissue-Derived Stroma Cells via Waterjet Technology
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科学分野:

  • ポリマー科学は,ポリマー科学である.
  • マテリアルサイエンス 材料科学
  • コロイド科学 コロイド科学

背景:

  • ポリ-N-イソプロピラクリラミド (p-NIPAm) などの熱反応性ポリマーは",スマート"な材料の開発に不可欠です.
  • コアシェルのマイクロゲルアーキテクチャは,材料の性質を正確に制御するためのプラットフォームを提供します.
  • マイクロゲルにおける相変化の運動学と熱力学を理解することは,その応用の鍵となる.

研究 の 目的:

  • 核殻のp-NIPAmマイクロゲルにおける化学的微分化の影響が,その相変遷行動に及ぼす影響を調査する.
  • シェル改変と熱誘発崩壊の運動学的関係を探求する.
  • 表面改変だけでマイクロゲルの脱水率を制御できるかどうかを判断する.

主な方法:

  • 核殻p-NIPAmマイクロゲルを合成するための種子と飼料の降水ポリメリゼーション.
  • 段階移行熱力学を分析するための微分スキャニング熱計 (DSC).
  • プロトン核磁気共鳴 (1H NMR) と温度プログラムフォトン相関スペクトロスコーピー (TP-PCS) を用いて,運動を研究する.

主要な成果:

  • ブチルメタクリlate (BMA) による貝殻の水性改変は,粒子の崩壊を大幅に遅らせます.
  • 段階移行の熱力学は,低レベルの水害性殻改変によってほとんど影響を受けません.
  • マイクロゲルの脱出速度は主に殻の性によって決定され,変化した領域の厚さによって決定されません.

結論:

  • コアシェルアーキテクチャは,調節可能な特性を持つスマートゲルの設計に有効です.
  • 殻の表面変更は,マイクロゲルの脱水運動を制御するのに十分です.
  • 崩壊中の表面皮層の形成は,脱毛の速度を制限するステップです.