👉 Nitrophile is a biological process that occurs in the presence of oxygen. It refers to the formation of a compound known as nitrate (NO3-). In this process, nitrogen from the environment is converted into nitrate by bacteria and other microorganisms, which then undergo a series of reactions with water to form nitric acid (HNO3) and hydrogen sulfide (H2S). This reaction creates a strong odor that can indicate the presence of an acidic environment. Nitrophiles