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Related Concept Videos

Aquaporins01:25

Aquaporins

Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
Osmosis and Osmotic Pressure of Solutions02:40

Osmosis and Osmotic Pressure of Solutions

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...
Xylem and Transpiration-driven Transport of Resources02:03

Xylem and Transpiration-driven Transport of Resources

The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
Permeability of Concrete01:25

Permeability of Concrete

Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...
Osmosis01:30

Osmosis

Osmosis is the movement of free water molecules through a semipermeable membrane.  The water's concentration gradient across the membrane is inversely proportional to the solutes' concentration. Whereas diffusion transports material across membranes and within cells, osmosis transports only water across a membrane, and the membrane limits the diffusion of solutes in the water. Osmosis is a special case of diffusion.
Water, like other substances, moves from a high concentration of free water...
Glomerular Filtration01:15

Glomerular Filtration

The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.

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Related Experiment Video

Updated: May 8, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Water permeation through single-layer graphyne membrane.

Jianlong Kou1, Xiaoyan Zhou, Yanyan Chen

  • 1Institute of Condensed Matter Physics, Zhejiang Normal University, Jinhua 321004, China. kjl@zjnu.cn

The Journal of Chemical Physics
|August 17, 2013
PubMed
Summary
This summary is machine-generated.

Single-layer graphyne-3 membranes show high water permeability due to hydrogen bonding and lower energy barriers. This makes them promising for water desalination and filtration applications.

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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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Last Updated: May 8, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

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Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

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

Published on: August 16, 2018

Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Carbon-based nanomaterials are extensively researched for advanced membrane applications.
  • Graphyne, a novel carbon allotrope, offers unique electronic and structural properties.
  • Understanding water transport through graphyne membranes is crucial for potential applications.

Purpose of the Study:

  • To investigate the molecular dynamics of water permeation through single-layer graphyne-3 membranes.
  • To compare the water permeability of graphyne-3 membranes with carbon nanotube membranes.
  • To elucidate the mechanisms behind the observed hydraulic permeability.

Main Methods:

  • Molecular dynamics simulations were employed to model water molecule permeation.
  • The graphyne-3 membrane and (5, 5) carbon nanotube membranes were simulated.
  • Analysis focused on water flux, hydrogen bonding, and energy barriers.

Main Results:

  • Single-layer graphyne-3 membranes exhibited higher water permeability compared to (5, 5) carbon nanotube membranes of similar pore size.
  • Hydrogen bond formation between water molecules across the graphyne-3 membrane facilitated water transport.
  • A lower energy barrier at the pore entrance contributed to the enhanced permeability.

Conclusions:

  • Single-layer graphyne-3 membranes possess remarkable hydraulic permeability.
  • The findings highlight the potential of graphyne-3 for water purification technologies, including desalination and wastewater treatment.