In the presence of oxygen and metal ions, notably copper and iron, bleomycins form a pseudo-enzyme that induces DNA cleavage.

在氧和其他金属离子特别是铜和铁离子存在时，博来霉素形成拟酶诱导DNA断裂。

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Materials easily ignited in air not only become more susceptible to ignition, but also burn with added violence in the presence of oxygen.

在空气中容易点燃的材料(在富氧空气中)不仅变得更容易点燃而且燃烧得更加剧烈。

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In this thesis, the heterogeneous reactions of SO_2 with oxides, atmospheric particles and mixtures were studied in the presence of oxygen.

大气颗粒物与大气化学成分的多相反应这一课题属于前沿课题。

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Finally, the whole sandwich is heated in the presence of oxygen, which combines with the precursor metals into fully fledged YBCO.

ECONOMIST: Inside story

Small flames were noted in one of the two incidents reported when gases escaping from the battery were ignited by an electrical short-circuit in the presence of ambient oxygen, but that was all external to the battery case.

FORBES: Boeing Completes Tests Leading To Resumption Of Dreamliner Operations

To keep turbine sales spinning, Immelt has turned to a process that partially burns pulverized coal in the presence of pure oxygen to turn it into a flammable gas that can drive linked gas and steam turbines.

FORBES: On The Cover/Top Stories