The infra-red spectra showed that the main chromophoric groups (conjugated carbonyl groups) were destroyed by bleaching agents, which was the main reason of brightness incremsent.
红外光谱表明，主要发色基团（共轭羰基）被漂剂破坏，这是提高浆白度的主要原因。
The infra - red spectra of quinones present a number of interesting features.
醌类的红外光谱具有一些有趣的性质。
The molecular weight distributions, infra-red, ultraviolet and nuclear magnetic resonance spectra for the polysilane polymers have been described.
本文还讨论了这些聚硅烷的分子量分布以及红外、紫外、核磁共振等光谱性质。
The molecular weight distributions, infra-red, ultraviolet and nuclear magnetic resonance spectra for the polysilane polymers have been described.
本文还讨论了这些聚硅烷的分子量分布以及红外、紫外、核磁共振等光谱性质。
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