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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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Gas Chromatography: Introduction01:13

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Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
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Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
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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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Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
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Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
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Updated: Oct 16, 2025

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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Membranes for Gas Separation.

Zhien Zhang1, Alessio Fuoco2, Guangwei He3,4

  • 1Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV 26506, USA.

Membranes
|October 22, 2021
PubMed
Summary
This summary is machine-generated.

Gas separation technologies are crucial for industrial processes like carbon capture and chemical purification. This study explores advanced methods to improve gas separation efficiency.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Gas separation is vital for numerous industrial applications, including chemical purification, carbon capture, and fuel production.
  • Efficient gas separation membranes and processes are continuously sought to address environmental and energy challenges.

Discussion:

  • This research investigates novel materials and methodologies for enhanced gas separation.
  • The study focuses on optimizing selectivity and permeability for specific gas pairs.
  • Analysis of process parameters influencing separation efficiency is presented.

Key Insights:

  • Development of advanced membrane materials with tailored pore structures.
  • Demonstration of improved separation performance for key industrial gases.
  • Identification of critical factors for scalable and cost-effective gas separation.

Outlook:

  • Future work will involve pilot-scale testing of the developed gas separation processes.
  • Potential for broader application in industrial gas purification and emissions reduction.
  • Contribution to the advancement of sustainable chemical processing and energy technologies.