nitrogen

• Among the blue-green algae are many species of nitrogen fixation .
  许多种蓝藻有固氮的能力。
• Mycorhizae perform the function of nitrogen fixation and storage .
  菌根起着固氮和贮氮的作用。
• Elemental nitrogen is a very unreactive and inert material .
  元素氮是一个十分不活跃的惰性物质。
• One atom of oxygen is linked to the nitrogen atom by a double bond .
  一个氧原子以双键与氮原子相连。
• After harvesting the crops, he tested them for nitrogen content .
  作物收获后，他测定了作物中氮的含量。
• Excessive application of nitrogen fertilizers results in tardy bearing .
  施用过量的氮肥结果使树延迟结果。
• Combustion at high temperature causes decomposition to nitrogen and water .
  氨在高温下燃烧分解成为氮和水。
• Urea is commonly used as the source of nitrogen in foliage sprays .
  尿素作为氮素给源普遍地应用于叶面喷布。
• Cyanide can serve as precursor for the amide nitrogen of asparagine .
  氰化物可以作一个天门冬酰胺的酰胺氮前体。
• The tube is blanketed in an inert gas such as nitrogen or argon .
  管子被整个地漫浸在流动的氮或氩等惰性气体中。