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.
But some TB infections need to be treated for up to 2 years. Tuberculosis is either latent or active. 1  Latent TB means that you have the TB bacteria in your body, but your body's defenses (immune system) are keeping it from turning into active TB.2  Active TB means that the TB bacteria are growing and causing symptoms.ut some TB infections need to be treated for up to 2 years. Tuberculosis is either latent or active. 1  Latent TB means that you have the TB bacteria in your body, but your body's defenses (immune system) are keeping it from turning into active TB.