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Related Concept Videos

What are Membranes?01:54

What are Membranes?

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A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
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What are Membranes?01:24

What are Membranes?

18.0K
A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries...
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Membrane Asymmetry Regulating Transporters01:19

Membrane Asymmetry Regulating Transporters

6.8K
Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
6.8K
Membrane Fluidity01:26

Membrane Fluidity

14.2K
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
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Membrane Fluidity01:23

Membrane Fluidity

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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Related Experiment Video

Updated: Dec 23, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Two-dimensional Material Membranes for Gas Separation.

Mostapha Dakhchoune1

  • 1Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Valais, Switzerland;,

Chimia
|April 26, 2020
PubMed
Summary

Two-dimensional (2D) nanosheets are revolutionizing gas separation membranes, offering high permeation and selectivity. This review covers synthesis, assembly, and transport mechanisms for advanced 2D material membranes.

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials, with their atomically thin structures, are key components for next-generation separation membranes.
  • These membranes offer superior permeation and selectivity due to unique nanopore and nanochannel architectures facilitating rapid transport.

Purpose of the Study:

  • To review recent advancements in 2D nanosheets for gas separation applications.
  • To highlight strategies for synthesizing 2D nanosheets and assembling them into effective membranes.
  • To discuss the transport mechanisms governing separation performance in these membranes.

Main Methods:

  • Literature review of cutting-edge research on 2D nanosheet synthesis.
  • Analysis of membrane fabrication techniques using 2D nanosheets.

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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  • Examination of studies detailing gas transport mechanisms through 2D material membranes.
  • Main Results:

    • 2D nanosheets enable membranes with exceptional flux and selectivity for gas separations.
    • Various synthesis strategies yield diverse 2D materials suitable for membrane applications.
    • Understanding transport mechanisms is crucial for optimizing membrane performance.

    Conclusions:

    • 2D nanosheet-based membranes represent a significant breakthrough in gas separation technology.
    • Continued research into synthesis and assembly will further enhance membrane capabilities.
    • Exploiting unique 2D material properties is vital for future separation advancements.