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関連する概念動画

Dialysis01:15

Dialysis

769
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
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Diffusion on Chromatography Columns01:07

Diffusion on Chromatography Columns

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In column chromatography, when an analyte is introduced as a narrow band at the top of the column, the solutes begin to separate and broaden, developing a Gaussian profile. This broadening occurs due to various factors, such as longitudinal diffusion.
Longitudinal diffusion occurs when the solute molecules in the mobile phase diffuse from the more concentrated center of the chromatographic band to the more dilute regions on either side, both towards and against the flow direction. This...
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Analyte Adsorption and Distribution01:09

Analyte Adsorption and Distribution

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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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Osmosis and Osmotic Pressure of Solutions02:40

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A number of natural and synthetic materials exhibit selective permeation, meaning that only molecules or ions of a certain size, shape, polarity, charge, and so forth, are capable of passing through (permeating) the material. Biological cell membranes provide elegant examples of selective permeation in nature, while dialysis tubing used to remove metabolic wastes from blood is a more simplistic technological example. Regardless of how they may be fabricated, these materials are generally...
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Overview Of Cell Separation And Isolation01:20

Overview Of Cell Separation And Isolation

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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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関連する実験動画

Updated: Aug 22, 2025

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
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拡散調節性多孔質材料を用いた水分分離器

Yan Su1, Ken-Ichi Otake2, Jia-Jia Zheng3

  • 1State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, P. R. China.

Nature
|November 9, 2022
PubMed
まとめ

研究者は,室温でH2OとD2Oのような水の同位体を効率的に分離するために,多孔調整ポリマー (PCP) を開発しました. PCP内のダイナミックゲートはゲストのトラフィックを制御し,重要なアプリケーションのための高い分離ファクターを可能にします.

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Last Updated: Aug 22, 2025

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科学分野:

  • 材料科学
  • 化学工学
  • 物理化学

背景:

  • 異なる同位体を持つ分子である同位体の分離は重要ですが,類似の特性により困難です.
  • 水の同位体 (H2O,D2O,HDO) は生物学,産業,医学において不可欠であるが,分離することは困難である.
  • 水の同位体に関する既存の分離方法は,しばしば非効率で,極端な条件を必要とします.

研究 の 目的:

  • 室温で水の同位体を分離するための効率的な方法を開発する.
  • アイソトープ分離のためのダイナミックゲート機能を持つ多孔調整ポリマー (PCP) を利用する.
  • 水のイソトポログの三元混合物の高い分離因子を達成する.

主な方法:

  • ダイナミックゲートメカニズムを備えた2種類の新型多孔調整ポリマー (PCP) の製造
  • PCP内の水同位体の吸収と拡散特性を調査する.
  • 温度に反応する吸収を活用した動力学に基づく蒸気分離方法を使用します.

主要な成果:

  • 設計されたPCPは,室温で水の同位体の効率的な分離を証明した.
  • PCP内のダイナミックゲートは,同位体拡散率の微妙な差異を拡大した.
  • D2O蒸気よりもH2O蒸気の好ましい吸収が観察され,高いH2O分離因数 (~210) が観察されました.

結論:

  • ダイナミックゲートを持つ多孔な調整ポリマーは,効率的な水同位体分離のための有望な戦略を提供します.
  • この方法は,H2O/HDO/D2O混合物の高性能,温度対応の蒸気分離を容易にする.
  • この発見は,純粋な水のイソトポログを必要とするアプリケーションに重大な意味を持つ.