Ammonia and the Haber process. Ammonia. Ammonia (NH3) is a compound [compound: A compound is a substance formed by the chemical union (involving bond formation) of two or more elements. ] of nitrogen and hydrogen. It is a colourless gas with a choking smell, and a weak alkali which is very soluble in water.
Latent tuberculosis infection (LTBI) is a condition in which a person is infected with M. tuberculosis, but does not currently have active tuberculosis disease.
Tweet. Tuberculosis is a disease caused by an infection with the Mycobacterium tuberculosis bacillus, a type of bacteria that can affect any part of the body but most commonly the lungs.he initial period of infection is known as the primary infection, which then progresses to the dormant phase (latent or inactive TB). Here the bacillus is sealed off from the healthy lung tissue in a tubercle. It can remain in this state for long periods of time.