Heterocyclic compounds with nitrogen heteroatom (s) only.
仅含有氮杂原子的杂环化合物。
The key step was a substrate controlled asymmetric heteroatom conjugated addition.
关键反应为底物控制的不对称杂原子共轭加成反应。
As an important approach of carbon-carbon bond formation and carbon-heteroatom bond formation, photochemistry of organic halides has been studied extensively.
有机卤代物的光反应作为构建碳-碳键和碳-杂原子键的一种重要途径已经得到了广泛和深入的研究。
The experimental results show that the fractions of the extracts consist mainly of aliphatic hydrocarbons, aromatic hydrocarbons and heteroatom-containing compounds.
实验结果表明，萃取物主要由脂肪烃、 芳香烃和含杂原子化合物组成。
The results showed that the aromatic ratio, heteroatom and metal contents contribute to the high polarity of the asphaltenes. This is the basis of other properties of heavy oil.
结果表明，沥青质的高极性是由其高芳烃含量、高杂原子和金属含量引起的，这是研究稠油其它性质的基础。
The results showed that the aromatic ratio, heteroatom and metal contents contribute to the high polarity of the asphaltenes. This is the basis of other properties of heavy oil.
结果表明，沥青质的高极性是由其高芳烃含量、高杂原子和金属含量引起的，这是研究稠油其它性质的基础。
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