The green spot, on the other hand, contained hydrogen, carbon, nitrogen, and oxygen.

And it was peculiar that the green spot should contain nitrogen, while the rock contained none at all.

The test showed an organic substance containing chlorine, carbon, and nitrogen.

At first the water in the reservoir was too cold and contained too much nitrogen, while not enough oxygen.

Other volatiles containing carbon and nitrogen were found in the same cold trap as ice.

Don't be tempted to use up the remains of a summer lawn fertiliser, which will contain too much nitrogen.

These naturally occurring alkaloids help in plant growth and contains nitrogen.

Wood ash has some value as a fertilizer, but does not contain nitrogen.

Air contains nitrogen, which is harmful for some steel grades.

The most important derivatives are the rings containing nitrogen.