Dictionary » E » Ether



1. (Science: physics) a medium of great elasticity and extreme tenuity, supposed to pervade all space, the interior of solid bodies not excepted, and to be the medium of transmission of light and heat; hence often called luminiferous ether.

2. Supposed matter above the air; the air itself.

3. (Science: chemistry) a light, volatile, mobile, inflammable liquid, (C2H5)2O, of a characteristic aromatic odour, obtained by the distillation of alcohol with sulphuric acid, and hence called also sulphuric ether. It is powerful solvent of fats, resins, and pyroxylin, but finds its chief use as an anaesthetic. Called also ethyl oxide. Any similar oxide of hydrocarbon radicals; as, amyl ether; valeric ether.

(Science: chemistry) complex ether, mixed ether, a condensing engine like a steam engine, but operated by the vapor of ether instead of by steam.

Origin: Written also aether.

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microbiology-archeobacteria and eubacteria

... that enclose lipids with hydrocarbons rather than fatty acids (not a bilayer). These lipids in the membranes of archaea are unique and contain ether linkages between the glycerol backbones rather than ester linkages. Archaea resembles eukaryotes more than bacteria. Their ribosomes work more ...

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by bellyjelly
Tue Jul 12, 2011 8:08 am
Forum: Microbiology
Topic: microbiology-archeobacteria and eubacteria
Replies: 11
Views: 17530

Extracting Steroid hormones

... find the concentration of a particular steroid hormone in blood serum for example, why do they extract them with organic solvents like benzene or ether? Is it due to chemically dislodge from carrier? Many thanks to your comments.

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by DerHaus
Sun Mar 14, 2010 12:11 am
Forum: Molecular Biology
Topic: Extracting Steroid hormones
Replies: 1
Views: 1286

Biochemistry/ Proteins & Amino Acids

... arginine and an internal arginine. Sanger could have differentiated between these two arginines in the following ways: one would have been in the ether layer of a 6 N HCl/ether extraction; both would have been yellow; and detecting each on a TLC plate would be easy using ninhydrin. 10. __true____ ...

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by SimplyMe
Tue Feb 23, 2010 8:32 am
Forum: General Discussion
Topic: Biochemistry/ Proteins & Amino Acids
Replies: 4
Views: 6540

ApoE Lipidation in Alzheimer's Disease

in the case of farnesyl (not FPP!) its ether bond ;) In some cases, it can be bound through thiol group of cystein (but maybe only the geranyl?) But back to the question, I think also phospholipids can bind to proteins through the phosphote. ...

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by JackBean
Mon Sep 21, 2009 8:07 pm
Forum: Molecular Biology
Topic: ApoE Lipidation in Alzheimer's Disease
Replies: 2
Views: 2576

Synthesis of thermostable Archaeal membrane

I just wondered about ether glycerol-lipid bond,phytanyl in monolayer in Archaea..instead of bilayer and esther bond in Bacteria and Eukarya.Can someone recommend me some site with biochemical pathway?

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by zami'87.
Wed Sep 16, 2009 5:41 am
Forum: Microbiology
Topic: Synthesis of thermostable Archaeal membrane
Replies: 2
Views: 1470
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