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单词 free radical
释义

Definition of free radical in English:

free radical

noun
Chemistry
  • An uncharged molecule (typically highly reactive and short-lived) having an unpaired valency electron.

    Example sentencesExamples
    • It is produced through a free radical polymerization reaction of styrene monomers.
    • These free radicals are highly reactive chemically and can themselves alter molecules in the cell.
    • In the free radical polymerization of ethylene to form polyethylene, a small amount of a peroxide is added to a large volume of ethylene.
    • This free radical attacks the double bonds on other monomers creating a longer chain molecule and an additional free radical.
    • It is well known that high-temperature free radical reactions can be quenched by the presence of nitric oxide, itself a free radical.
 
 

Definition of free radical in US English:

free radical

nounfri ˈrædəkəl
Chemistry
  • An uncharged molecule (typically highly reactive and short-lived) having an unpaired valence electron.

    Example sentencesExamples
    • In the free radical polymerization of ethylene to form polyethylene, a small amount of a peroxide is added to a large volume of ethylene.
    • These free radicals are highly reactive chemically and can themselves alter molecules in the cell.
    • It is well known that high-temperature free radical reactions can be quenched by the presence of nitric oxide, itself a free radical.
    • It is produced through a free radical polymerization reaction of styrene monomers.
    • This free radical attacks the double bonds on other monomers creating a longer chain molecule and an additional free radical.
 
 
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更新时间:2024/12/23 23:52:46