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 (ə-sĕt′l-ēn′, -ən)
A colorless, highly flammable or explosive gas, C2H2, used for metal welding and cutting and as an illuminant. Also called ethyne.

a·cet′y·len′ic (ə-sĕt′l-ĕn′ĭk) adj.
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Adj.1.acetylenic - of or related to acetyleneacetylenic - of or related to acetylene    
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Wetting agents are 12% of the pounds and 13% of the dollars, and include high volume alkoxylated surfactants and more specialized silicone, acrylic, acetylenic glycol derivatives and fluorosurfactant kinds.
The acrylic adhesive, acetylenic diol, was determined to be present in the sample.
Histrionicotoxins: Roentgen-Ray Analysis of the Novel Allenic and Acetylenic Spiroalkaloids Isolated from a Colombian Frog, Dendrobates histrionicus.
The peak located at 2255 cm-1 represents the acetylenic stretch (Fig.
The best result with the PV 23 colorant was obtained with an alkoxylated acetylenic diol-based surfactant (Figure 4).
Inhibition of alcohol dehydrogenase activity by acetylenic and allylic alcohols: concordance with in vivo electrophilic reactivity in fish.
It is known that many of the so-called 'unusual' fatty acids, such as short-chain, cyclopropanoid or acetylenic fatty acids have antifungal activity (Carballeira, 2008).
This volume outlines a methodology of regioselective synthesis of aromatic and nonaromatic carbocyclic and heterocyclic ring systems based mainly on [2+2+2] and [4+2] cycloaddition, and other reactions of acetylenic units, including enediynes and enyne-allenes.
The imaginary frequency of the transition state of the trans-deprotonation step (14) corresponds to the elongation of the C-H bond of the acetylenic proton.
The principal goal of this proposed Marie Curie project is to develop a new class of structurally-stable chiral macromoleculesalleno acetylenic oligomerswith an all-carbon backbone and rigid helical secondary structure that will result in high optical activity.