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单词 geminal
释义

Definition of geminal in English:

geminal

adjectiveˈdʒɛmɪn(ə)lˈjemənl
Chemistry
  • Denoting substituent atoms or groups, especially protons, attached to the same atom in a molecule.

    Example sentencesExamples
    • Particularly in the pathological examination, we discovered that it could activate and proliferate cells in lymph follicles, geminal centre, paracortical zone and medullary cord of lymph nodes.
    • The fellow doing it was down the hall from me in graduate school, and he was doing an obscure reaction which forms a geminal dinitrile, which themselves are rather obscure compounds.
    • Compounds in which two hydroxyl groups are attached to the same carbon atom (geminal diols) normally cannot be isolated.
    • This showed a reactive lymph node with prominent geminal centres and focal areas in keeping with necrotising granulomata.

Derivatives

  • geminally

  • adverb
    Chemistry
    • One of these involves the properties of amides that are geminally substituted at nitrogen with two heteroatoms, so-called ‘Anomeric Amides’.
      Example sentencesExamples
      • However, fluoro-amino acid derivatives have rarely been synthesized because of the inherent instability of the geminally halogenated amine moiety.
      • Although the anomeric effect was originally identified in pyranoid rings, its relevance to conformational analysis of geminally hetero-atom substituted carbon chains was immediately obvious.

Origin

1960s: from Latin geminus 'twin' + -al.

 
 

Definition of geminal in US English:

geminal

adjectiveˈjemənl
Chemistry
  • Denoting substituent atoms or groups, especially protons, attached to the same atom in a molecule.

    Example sentencesExamples
    • The fellow doing it was down the hall from me in graduate school, and he was doing an obscure reaction which forms a geminal dinitrile, which themselves are rather obscure compounds.
    • Compounds in which two hydroxyl groups are attached to the same carbon atom (geminal diols) normally cannot be isolated.
    • Particularly in the pathological examination, we discovered that it could activate and proliferate cells in lymph follicles, geminal centre, paracortical zone and medullary cord of lymph nodes.
    • This showed a reactive lymph node with prominent geminal centres and focal areas in keeping with necrotising granulomata.

Origin

1960s: from Latin geminus ‘twin’ + -al.

 
 
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更新时间:2024/12/23 16:33:43