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词汇 molecular weight
释义

Definition of molecular weight in English:

molecular weight

noun
  • another term for relative molecular mass
    Example sentencesExamples
    • Milk protein, or casein, is a mixture of molecules with molecular weights ranging from 75,000 to 375,000 daltons (amu).
    • During these reactions, they are chemically linked forming macromolecules, or polymers, which have large molecular weights.
    • Although this is adequate for some common proteins, it is useless for, say, enzyme complexes that commonly have molecular weights of 5 MDa or more.
    • Alcohols and ethers having higher molecular weights do not dissolve well in water, however, because the water molecules can not completely surround those molecules.
    • The ethyl group has a greater molecular weight than the smallest alkyl radical which is the methyl group.

Definition of molecular weight in US English:

molecular weight

noun
  • The ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12.

    Example sentencesExamples
    • The ethyl group has a greater molecular weight than the smallest alkyl radical which is the methyl group.
    • Alcohols and ethers having higher molecular weights do not dissolve well in water, however, because the water molecules can not completely surround those molecules.
    • Although this is adequate for some common proteins, it is useless for, say, enzyme complexes that commonly have molecular weights of 5 MDa or more.
    • During these reactions, they are chemically linked forming macromolecules, or polymers, which have large molecular weights.
    • Milk protein, or casein, is a mixture of molecules with molecular weights ranging from 75,000 to 375,000 daltons (amu).
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