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词汇 heterolysis
释义

Definition of heterolysis in US English:

heterolysis

noun ˌhetəˈräləsis-rōˈlīsis
  • 1Biology
    The dissolution of cells by lysins or enzymes from different species.

  • 2Chemistry
    The breakdown of a compound into oppositely charged ions.

    Example sentencesExamples
    • However, heterolysis is the main process for generating the isolated phenoxy radicals.
    • The energy required to break a given bond of some specific compound by heterolysis.
    • In accordance with this embodiment, the dye cation formed from heterolysis of the leuconitrile color former is bleachable at high doses of actinic radiation.
    • By mutations that place the histidine in a similar distance to the heme as in the active site of peroxidases, compound I of myoglobin has been observed, probably owing to an increased rate of heterolysis.
    • This showed the reaction to proceed via the formation of a ring-closed carbonium ion-intermediate at C1, and the rate-determining step to be the subsequent heterolysis of the C1 - O bond.
    • The conclusion was that homolysis and heterolysis did not take place; furthermore the paper summarized the chemistry of peroxynitrite known at that time.

Derivatives

  • heterolytic

  • adjective
    • The more common way is ‘heterolytic cleavage’ where one of the atoms retains both of the bonding electrons, and the other takes none.
      Example sentencesExamples
      • The C - 8 position of guanine in DNA is the major site of reaction of the potent electrophile acetoxy-IQ, which forms a nitrenium ion, by heterolytic loss of the acetoxy group, as the ultimate DNA-reactive species.
      • The two different species are formed by homolytic or heterolytic O-O bond cleavage and H-atom abstraction, respectively.
      • Reactions 4 and 5 involve homolytic and heterolytic O-O bond cleavage of the peroxides, respectively, and in most cases, the two pathways can be identified by product analysis.
      • For example, when malachite green is irradiated with UV light of 225-300 nm, heterolytic cleavage of the C-R bond occurs, and a charged photoproduct is formed with minimal changes in geometric conformation.

Definition of heterolysis in US English:

heterolysis

noun-rōˈlīsis
  • 1Biology
    The dissolution of cells by lysins or enzymes from different species.

  • 2Chemistry
    The breakdown of a compound into oppositely charged ions.

    Example sentencesExamples
    • The conclusion was that homolysis and heterolysis did not take place; furthermore the paper summarized the chemistry of peroxynitrite known at that time.
    • The energy required to break a given bond of some specific compound by heterolysis.
    • By mutations that place the histidine in a similar distance to the heme as in the active site of peroxidases, compound I of myoglobin has been observed, probably owing to an increased rate of heterolysis.
    • However, heterolysis is the main process for generating the isolated phenoxy radicals.
    • This showed the reaction to proceed via the formation of a ring-closed carbonium ion-intermediate at C1, and the rate-determining step to be the subsequent heterolysis of the C1 - O bond.
    • In accordance with this embodiment, the dye cation formed from heterolysis of the leuconitrile color former is bleachable at high doses of actinic radiation.
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