四唑属富氮且稳定性较好的化合物，。是目前研究较多的高能钝感含能材料。

Tetrazole is the unsaturated energetic heterocyclic compound with high nitrogen content and good stability leading to the high energy yet low sensitivity materials.

youdao

但是研究者发现角质蛋白复合物的化学键保留的很少。 富氮层在两个化石上都有所发现。

But the researchers found chemical-bond fingerprints of chitin-protein complex in thin, nitrogen-rich layers in both fossils.

youdao

研究发现，焦化蜡油中主要的富氮组分是较小分子的戊烷不溶物，或者是更小分子、极性较强的己烷不溶物。

It is found that the major nitrogen sources in coker gas oils are associated with relatively small pentane insoluble species and an even smaller, highly polar, hexane insoluble species.

youdao