固氮——迫使空气里的氮气直接跟氢气反应生成氨气的过程——是由一些细菌和蓝绿澡来完成的。(New Scientist,10 April,P30)另一方面化学家们须得化很大代价才能摸造出这些低等生物体。关键的问题是如果没有大量能量不活泼的氮气分子绝不会起反应生成氨气。目前日本科学家们已经发现让大量的电流通过氮气,它们能产生足够的能量使氮气去捕捉水中的氢气从而生成氨气。 Nitrogen fixation - the process of forcing nitrogen in the air to react directly with hydrogen to produce ammonia - is done with some bacteria and blue-green bath. (New Scientist, 10 April, P30) Chemists, on the other hand, have to deadend these lower organisms to a great extent. The key issue is that nitrogen molecules that do not have a lot of energy and are not reactive will never react to produce ammonia. At present, Japanese scientists have found that by passing a large amount of current through nitrogen, they can generate enough energy for nitrogen to capture the hydrogen in the water to generate ammonia.