Halocarbon


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halocarbon

[¦ha·lō¦kär·bən]
(organic chemistry)
A compound of carbon and a halogen, sometimes with hydrogen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Halocarbon

Class of man-made chemicals, including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs), whose heat-trapping properties are among the most damaging of the greenhouse gases. This, coupled with their tendency to remain in the atmosphere for hundreds of years, has resulted in limits on their use. Halocarbons are most commonly used in refrigeration, air conditioning, and electrical systems, as well as blowing agents in some foam insulation products.
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References in periodicals archive ?
Its services include identification of unknown substances that may damage the environment, on-site removal and packaging and handling in accordance with regulations, cylinder refurbishing and re-certification, fractional distillation, and establishing halocarbon banks and strategic reserves.
Several classes of halocarbons containing fluorine, chlorine, and
This halocarbon reclamation facility will be state of the art with the latest, most advanced equipment for the reclamation and management of Halons and refrigerants that are either ozone depleters or high in global warming potential.
Only one category (halocarbons) has grown faster than the economy, but the growth in energy use is also significant.
In addition, many macroalgae have cell-wall-located haloperoxidases, which are limited in their activity by [H.sub.2][O.sup.2] and which generate hypohalous acids and various halocarbons, such as bromoform (CH[Br.sub.3]) (Carpenter and Liss, 2000).
(13.) Traverso, O, Scandola, F, "Photooxidation of Ferrocene in Halocarbon Solvents." Inorg.
This finding, along with the resistance of CHCs to oxidation, suggests that the formation of PAHs and chlorinated PAHs (ClPAHs) may be more facile in halocarbon combustion systems than in hydrocarbon systems.
The other 6 animals (MPX-5 to MPX-10) were infected by the intranasal route; under Halothane (Halocarbon Laboratories, River Edge, N J, USA) anesthesia, 2 drops ([approximately equal to] 100 [micro]L) of the stock virus solution containing [10.sup.6.1] PFU/mL were instilled into each nostril.
While there are a number of halocarbon refrigerants available, there is no question that an ammonia central refrigeration system still has the lowest initial installed cost, as well as the lowest operating cost, since it is more efficient than any of the halocarbons and is less expensive to purchase.
Anesthetics, dosages and administration routes used were; pentobarbital sodium 10.0 mg/100 g intraperitoneal injection (IP) (Fort Dodge, Fort Dodge, Iowa, USA), ketamine 7.5 mg/100 g IP (Ketaset; Fort Dodge, Fort Dodge, Iowa, USA), 2% halothane (2-bromo-2-chloro-1,1,1trifluoroethane, Halocarbon, River Edge, NJ, USA) delivered via a precision vaporizer.
Particularly sensitive to halogens due to its detection mechanism, it has continued to enjoy popularity as the primary detector for trace level determinations of chlorinated insecticides and halocarbon residues in environmental samples.