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highly addictive substance found in tobacco that accelerates the heart rate, and contracts and...
convert nitrites into nitrates or ammonium ions into nitrites.
the process by which nitrogen passes through the ecosystem.
the process during which nitrogen gas is converted into substances that can be used by plants,...
pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during ...
bacteria that convert nitrogen in the air into compounds such as nitrites, nitrates and ammonia...
animal wastes (particularly urine) that contain materials high in nitrogen.
a state in which the outer energy level of an atom of any element is completely filled with...