from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A bivalent hydrocarbon radical, CH2-, a component of unsaturated hydrocarbons.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The divalent radical CH2< in which the free valencies are part of single bonds.
- n. The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.
- n. The unstable carbene CH2:
from the GNU version of the Collaborative International Dictionary of English
- n. A divalent hydrocarbon radical, -CH2-, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; ; -- formerly called also methene.
from The Century Dictionary and Cyclopedia
- n. A bivalent hydrocarbon radical (CH2) which does not exist free, but occurs in many compounds, as methylene iodide, CH2I2. Also called methene.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the bivalent radical CH2 derived from methane
For example, methylene is linear in its ground state but bent in states of higher energy.
"It appears they were boiling a chemical called methylene chloride as they normally do as part of their process," he said.
"surfactants" called methylene blue active substances in her well water and her pond.
The protoplasm also contains peculiar angular granules, which stain deeply with basic dyes, such as methylene blue; these are known as Nissls granules (Fig. 626).
Tests have already shown that gold-decorated nanowires can decompose organic molecules such as methylene blue.
There are the old standard gel strippers containing caustic solvents such as methylene chloride and methyl ethyl ketone.
Typical decaffeinated coffees are processed using toxic organic solvents such as methylene chloride and ethyl acetate.
Compared to thermal or paint stripping, the chemical process is considerably faster and protects the user from harmful chemicals such as methylene chloride.
The Personal Care Products Council, an industry group, says formaldehyde levels in cosmetic products shouldn't exceed 0.2% and advises consumers getting their hair treated with products containing formaldehyde and methylene glycol to do so only at a well-ventilated salon.
The company has launched Brazilian Blowout Zero, a product it says is free of both formaldehyde and methylene glycol.
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