Examples of using Cfcs in English and their translations into Vietnamese
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Colloquial
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Ecclesiastic
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Computer
On release into the air, CFCs rise to the stratosphere.
As a result, HFCs were developed to replace CFCs.
CFCs were first produced commercially by DuPont in the 1930s.
But really, at the time, CFCs were a really remarkable invention.
CFCs are compounds often known by their collective brand name, Freon.
It turns out that the Montreal Protocol never completely banned CFCs.
CFCs are released from aerosol sprays, air conditioning systems and refrigerators.
Only recycled and stockpiled CFCs were available for use in developed countries.
The CFCs have still higher boiling points because the chloride is even more polarizable than fluoride.
The most important reaction[] of the CFCs is the photo-induced scission of a C-Cl bond.
Bromine atoms are even more efficient catalysts;hence brominated CFCs are also regulated.
In October 1978, CFCs used as propellants in aerosol cans were banned in the United States.
This is because the depletion is caused by the chlorine atoms in CFCs, which dissociate when struck by UV radiation.
HCFCs and HFCs survive in the atmosphere for two to 40 years,compared with about 150 years for CFCs.
Beginning January 1, 1996, only recycled and stockpiled CFCs will be available for use in developed countries like the US.
CFCs and HCFCs are used in a variety of applications because of their low toxicity, reactivity and flammability.
Chloro-fluorocarbons were banned in 1978, so if the product contained CFCs it would be illegal.
The dramatic reduction in CFCs over the last 20 years is an environmental success story.
Automotive catalytic converters clearance of the three mainpollutants can reach 90% of its total(hydrocarbons, CFCs and nitrous oxide).
And although we now know that CFCs are the root cause of this ozone hole, at the time, the science was far from settled.
England and his colleagues compared climate simulations both with andwithout the mass emission of CFCs that began in the 1950s.
The physical properties of CFCs and HCFCs are tunable by changes in the number and identity of the halogen atoms.
This is the first time emissions of one of the three most abundant,long-lived CFCs have increased for a sustained period since the late 1980s.
Unlike CFCs, most HCFCs are broken down in the lowest part of the atmosphere and pose a much smaller risk to the ozone layer.
It is the first time levels of one of the three most abundant,long-lived CFCs has increased for a sustained period since the late 1980s.
However, when research concluded that CFCs cause destruction of stratospheric ozone, they were replaced with other solvents, such as alcohols and hydrocarbons.[9].
Through the initiative, Seychelles will be able toreplace appliances such as refrigerators with HCFCs and CFCs with those using natural gases.
The CFCs are far less flammable than methane, in part because they contain fewer C-H bonds and in part because, in the case of the chlorides and bromides, the released halides quench the free radicals that sustain flames.
There are other foams which do not change significantly with aging because they are blown with water or are open-cell andcontain no trapped CFCs or HFCs(e.g., half-pound low density foams).
These findings represent the first time emissions of one of the three most abundant,long-lived CFCs have increased for a sustained period since production controls took effect in the late 1980s.