To explore the role of the bridged N atom for a possible proton transfer in the active site of hydrogenase, we tried to introduce a hydrogen bond into a couple of designed molecules.

为研究氢化酶活性中心氮桥结构中氮原子是否起到质子摆渡的作用，设计了在分子内引入氢键的结构。

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The number of active hydrogen atoms attached to nitrogen atom of different classes of amine determine their effectiveness in extraction of metals by solvation.

根据与氮相连结的活性氢原子的多寡与有无，讨论了伯、仲、叔胺类溶剂化能力的强弱。

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So the question is this: Can you balance a pencil sharpened to a perfect single atom wide tip on its tip, without active stabilization?

那么，问题在此，你能否将一只铅笔平衡在其原子大小的尖端，而不需要动态平衡吗？

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So the question is this: Can you balance a pencil sharpened to a perfect single atom wide tip on its tip, without active stabilization?

那么，问题在此，你能否将一只铅笔平衡在其原子大小的尖端，而不需要动态平衡吗？

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