Phenol Ether Extraction
Phenol Ether Extraction - Related Videos
05:31
Purification and Visualization of Lipopolysaccharide from Gram-negative Bacteria by Hot Aqueous-phenol Extraction
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Cited by 168 •
2012
We describe a modified hot aqueous-phenol extraction method for purifying lipopolysaccharide (LPS) from Gram-negative bacteria. Once extracted, the LPS can be subsequently analyzed by SDS-PAGE and visualized by direct staining or Western immunoblot.
02:29
Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
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2023
Overview Ethers can be prepared from organic compounds by various methods. Some of them are discussed below, Preparation of Ethers by Alcohol Dehydration In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K. This method is a nucleophilic substitution reaction. The two alcohol molecules...
08:16
Phenol Red Thread-based Sampling Procedure for Untargeted Tear Fluid Lipidomics in Biomarker Discovery
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2025
This protocol describes a unique clinical protocol for collecting human tear fluid samples using phenol red threads and liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based workflow to discover the tear lipidomic profile. The simple methyl tert-butyl ether (MTBE)/methanol biphasic separation method enables rapid tear lipid extraction with high recovery for tear biomarker discovery.
02:28
Structure and Nomenclature of Ethers
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2025
Structure and Bonding Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm. Classification of Ethers Based on their attached substituent groups, ethers can be classified into two...
02:36
Crown Ethers
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2023
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules take.
FAQs
Compounds distribute between the resulting phases according to polarity, solubility, and their preference for one solvent environment over another. Molecules that interact more favorably with a particular phase become enriched there, while others remain in a different fraction. This selective partitioning allows a complex biological or microbial sample to be examined as chemically distinct groups rather than as one mixture.
Disrupting the sample matrix helps release chemical components that may otherwise remain associated with biological or microbial material. Phenol and ether provide the solvent conditions needed to break up those associations and promote subsequent partitioning. The effectiveness of this stage influences which molecules become available for collection, so matrix composition can affect the chemical profile of each recovered fraction.
Separated fractions reduce the chemical complexity presented to downstream analyses. Instead of assessing all sample constituents together, investigators can examine groups enriched according to their phase preference and relate particular fractions to molecular composition or biological activity. This separation can help distinguish which extracted components are associated with microbial surface features, lipid-related antigens, or host-response effects.
The workflow begins with a complex biological or microbial sample and solvent treatment that disrupts its matrix. The sample components then partition according to polarity, solubility, and phase preference. After separation, the resulting fractions are collected individually for downstream analysis. The central outcome is not simply solvent exposure, but recovery of chemically differentiated material for comparison.
This approach can be applied to complex biological or microbial samples when the objective is to examine extracted chemical components. In immunology and infection studies, the recovered material may support analysis of microbial surface components, lipid-associated antigens, and other molecules involved in host-pathogen interactions. Its value depends on connecting the composition of each fraction with its biological or immunological activity.
Researchers can compare the molecular content of separated fractions with inflammatory responses, immune activation, or other biological activity associated with infectious agents. This creates a link between chemical composition and host-pathogen interactions. Fractions that show distinct activity can guide further characterization of the extracted molecules responsible for, or associated with, particular immune or infection-related effects.