نتایج جستجو برای: chlorofluorocarbons
تعداد نتایج: 647 فیلتر نتایج به سال:
Global warming from chlorofluorocarbons and their alternatives: Time scales of chemistry and climate
Model calculations show that the oceans do not represent a global sink for chlorofluoromethanes (CFM 11 and 12) of any significance. The amount absorbed by the oceans consists essentially of three portions: The portion dissolved in the mixing layer; the one that enters the deep sea and the portion which is decomposed or disappears otherwise within the mixing layer by chemical or biological proc...
The prototype binuclear elimination (E2) reaction illustrates the mechanism of a large number of biochemical and industrial applied processes but has received surprisingly little attention in theoretical studies compared to, for example, the substitution (SN2) reaction. This is due to its concerted mechanism, which requires an independent description of the three bonds that are being formed or ...
It is well established that anthropogenic chlorine-containing chemicals contribute to ozone layer depletion. The successful implementation of the Montreal Protocol has led to reductions in the atmospheric concentration of many ozone-depleting gases, such as chlorofluorocarbons. As a consequence, stratospheric chlorine levels are declining and ozone is projected to return to levels observed pre-...
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