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関連する概念動画

Colloidal precipitates01:09

Colloidal precipitates

4.6K
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...
4.6K
Coagulation01:06

Coagulation

1.1K
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...
1.1K
Formation of Complex Ions03:45

Formation of Complex Ions

25.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.5K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

20.4K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
20.4K
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

4.9K
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...
4.9K
Complexation Equilibria: Overview01:23

Complexation Equilibria: Overview

1.3K
Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
1.3K

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Updated: Dec 30, 2025

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

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多相複合コアセルバットドロップ

Tiemei Lu1, Evan Spruijt1

  • 1Institute for Molecules and Materials , Radboud University , Heyendaalseweg 135 , 6525 AJ , Nijmegen , The Netherlands.

Journal of the American Chemical Society
|January 22, 2020
PubMed
まとめ
この要約は機械生成です。

多成分液体液相分離は,階層的に組織された滴を形成する. マクロ分子密度と塩分濃度の差異は,生物系におけるドロップレット形成と層化を予測する.

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Using the Droplet Transfer Method to Reliably Prepare Giant Unilamellar Vesicles
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関連する実験動画

Last Updated: Dec 30, 2025

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
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科学分野:

  • バイオ物理学
  • 細胞生物学
  • 材料科学

背景:

  • 細胞組織は液体液相分離 (LLPS) に依存している.
  • 亜細胞体は,複数の共存ドメインを持つ階層的な組織を示します.
  • 多成分滴の組立と共存を制御する分子機構は不明である.

研究 の 目的:

  • 階層的に構造化された多相滴の形成と組織を調査する.
  • 階層的配置と相分離を予測するための理論的ガイドラインを開発する.
  • 合成コンパートメントの設計におけるコンデンサ不混合性の可能性を探求する.

主な方法:

  • 充電駆動型LLPSのモデルシステムとして複合コアセルバートを利用した.
  • 表面の緊張と塩分濃度を分析した.
  • コアセルバト混合物のマクロ分子密度の差を調査した.

主要な成果:

  • 3つの共存する層を持つ多相滴の階層的な組織が示されています.
  • 表面張力と臨界塩濃度とドロップレット構造を相関させる理論的ガイドラインを確立した.
  • マクロ分子密度と塩分濃度の差が共生生物の共存を予測することを示した.
  • 共存するコアセルバートの内部で 異なる化学環境が観察され, ゲスト分子の濃度に影響する.

結論:

  • 階層的に組織された多相滴は,複雑なコアセルバト混合物における一般的な現象である.
  • コンデンサ不混合性は,生物学的システムにおける一般的な特徴である.
  • 発見は,生物分子プロセスのための自己組織化合成コンパートメントの理解と設計のための枠組みを提供します.