The film with more DNA and higher N/P ratio might provide a new method to enhance transfection in localized gene delivery system.

这种含有较多DNA和较高N/P比的多层膜为提高原位基因传递体系的转染效率提供了一种新方法。

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Mustard of non-structural specificity disturbs the synthesis of DNA due to the active functional group of N, N-(2-chloroethyl) amino.

氮芥是非结构专一性抗肿瘤生物烷化剂，作用靶点主要是DNA，其中N，N-（2-氯乙基）氨基是抗肿瘤活性功能基。

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If you start with only one, you have two pieces of DNA, then you'll get 2 to the Nth fragments after N cycles because each cycle you're doubling the number.

如果你从仅仅一个DNA开始,你有两条DNA链,经过N次循环后,就得到二的N次方个DNA片段,因为每次循环都使其数量翻倍

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