An enrichment technique for ammonia oxidizing bacteria was introduced in this paper.

建立了一种氨氧化细菌的富集培养方法。

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Canada is rich in natural resources, for ammonia, urea, methanol and ethylene production.

加拿大有丰富的天然气资源，用于合成氨、尿素、甲醇和乙烯的生产。

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"I think the next thing they have to do is find the bacterial sensor for ammonia, " Sperandio adds.

“我认为下一阶段他们所需做的事情就是找出细菌对于氨作出回应的传感器，”Sperandio又说道。

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Discovery is delivering a new astronaut sleeping quarters, an ammonia tank and a gyroscope for the space station.

VOA: standard.2010.04.05

So we can have our two hydrogen atoms come in here, and what we will find is - now that we have all of our orbitals filled up -- so thinking about what this angle is here, would you expect it to be less than or greater than what we saw for ammonia before?

我们在这里有两个氢原子，我们会发现,现在我们所有的轨道都填满了-,考虑一下这里的角度，你们觉得它比在氨中看到的,要大还是要小？

麻省理工公开课 - 化学原理课程节选

What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

After the manure is processed in the digester, liquid waste enters an aeration bin, where it is treated for ammonia and other pollutants.

FORBES: Written by John Platt

According to the most recent 10-K for the firm, 64% of production costs for ammonia (at their East Dubuque facility) in the most recent year were due to natural gas.

FORBES: Surging Natural Gas Prices Takes Toll On Rentech

To their surprise, they discovered that the seed-formation rates for sulphuric acid and ammonia are between a tenth and a thousandth of those needed to account for the cloud seeding actually seen in the atmosphere.

ECONOMIST: Climate science (II)