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関連する概念動画

Colloidal precipitates01:09

Colloidal precipitates

6.6K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.6K
Colloids03:22

Colloids

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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...
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Protein Complex Assembly02:41

Protein Complex Assembly

16.9K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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Coagulation01:06

Coagulation

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.5K
Colloids and Suspensions01:17

Colloids and Suspensions

3.6K
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 visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.6K
Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

28.0K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
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Updated: Feb 23, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

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タンパク質媒介型コロイド組

Maiko Obana1, Bradley R Silverman1, David A Tirrell1

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.

Journal of the American Chemical Society
|September 13, 2017
PubMed
まとめ
この要約は機械生成です。

研究者はタンパク質とタンパク質の相互作用を使って 微粒子のコロイド組成をプログラムしました この多用途な方法は,高度な材料科学とバイオテクノロジーのアプリケーションのための調節可能な積層サイズと正交の組み立てを可能にします.

さらに関連する動画

Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles

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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

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関連する実験動画

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Synthesis and Characterization of Supramolecular Colloids
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Synthesis and Characterization of Supramolecular Colloids

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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

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科学分野:

  • 材料科学
  • バイオテクノロジー
  • バイオ物理学

背景:

  • プログラム可能なコロイドアセンブリは 下から上までの材料の製造に不可欠です
  • DNAオリゴヌクレオチドは一般的に使用されますが,タンパク質はより多様な機能を提供します.
  • タンパク質がコロイド組成を直接する方法は広く研究されていない.

研究 の 目的:

  • 指示されたコロイドアセンブリのためのタンパク質-タンパク質の相互作用の使用を調査する.
  • タンパク質を用いた微粒子の 調節可能で直角な組成を実証する.
  • タンパク質媒介の相互作用を用いて複雑なコロイド構造の形成を調査する.

主な方法:

  • 微粒子の上に固定されたタンパク質間の可逆のコイル・コイル相互作用と不可逆の分子間イソペプチド結合を利用した.
  • 表面に固定されたタンパク質の濃度を調整することによって,集積の大きさを制御します.
  • 粒子の結合のために異なるタンパク質のペアを用いて,直角な組成を示した.
  • 化学デナチュラントと競合するタンパク質を用いたタンパク質結合の分解を調査した.
  • タンパク質とタンパク質の相互作用により 複雑なコア・シェル構造を組み立てた.

主要な成果:

  • プロテインとプロテインの相互作用により,ポリチレン微粒子の制御された集積を達成した.
  • タンパク質濃度に基づく調整可能な積層のサイズを示した.
  • 異なるタンパク質のペアで正方形の組み立て能力を示しました
  • イソペプチド結合集積物とは異なり 回転性があることが確認された.
  • 複合的なコア・シェル・コロイド・アグリゲットを成功裏に構築した.

結論:

  • プロテイン対プロテインの相互作用は,コロイド組成のための多用途でプログラム可能な戦略を提供します.
  • このアプローチは,調節可能な性質を持つメソスケール材料の設計を可能にします.
  • この発見は,材料科学とバイオテクノロジーの応用に重大な意味を持ちます.