nitrogen造句
1. Nitrogen forms four-fifths of the atmosphere.
2. Oxygen, hydrogen and nitrogen are all gases.
3. Liquid nitrogen boils at a very low temperature.
4. Most fertilizers contain nitrogen and phosphates.
5. Nitrogen is a gas without colour or smell.
6. Air is composed mainly of nitrogen and oxygen.
7. Air consists chiefly of nitrogen.
8. What is the percentage of nitrogen in air?
9. Many fertilizers contain nitrogen compounds.
10. Sulphur dioxide and nitrogen oxide combine to form acid rain.
11. Britain has agreed to cut emissions of nitrogen oxide from power stations.
12. Nitrogen is converted into nitrates in the soil which plants can then use.
13. The faeces contain nitrogen and it is that which fertilises the desert soil.
14. Nitrogen constitutes 78% of the earth's atmosphere.
15. Peas and beans put nitrogen into the soil.
16. Lettuce and spinach are particularly vulnerable to nitrogen uptake.
17. How much nitrogen is there in the air?
18. The solid nitrogen is also dissipating faster than expected.
19. Protein compounds contain approximately I 6 percent nitrogen. 151.
20. What are the prospects for nitrogen fixation in plants?
21. Four-fifths of the modern atmosphere consists of nitrogen gas.
22. Nucleic acids contain carbon, hydrogen, oxygen, nitrogen, and phosphorus.
23. Molecular nitrogen, a very stable molecule, is even better.
24. First[/nitrogen.html], the nitrogen oxides are toxic to animals.
25. Immobilization of nitrogen occurs in both types in both sites but phosphorus is immobilized only in the fern litter.
26. The atmosphere consist of more than 70 % of nitrogen.
27. Every tonne of coal contains, on average, 30 kilograms of nitrogen.
28. The 1,3,2,4-dithiadiazoles show a 1:1:1 triplet due to the spare electron being largely localised at the nitrogen atom remote from the ring substituent.
29. The first two chapters discuss a number of pollution incidents and the biological cycles of carbon nitrogen and sulphur.
30. The zinc sulphide is then transferred to a vessel through which passes an inert gas, such as nitrogen or carbon dioxide.
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