➤ Element organogen - 3.1%; is one of the components of amino acids, proteins, nucleic acids, participates in metabolic processes (respiration, digestion, synthesis of nucleic acids).

➤ It can contribute to the development of decompression sickness, nephropathy, and in cases of hypertension, asphyxia.

➤ Difficulties in growth and development, immunodeficiency, impaired protein biosynthesis, weakness, lethargy, stress, hypersensitivity to ARVI.

➤ NH₄OH (Ammonium hydroxide) - ammonia, excites the central nervous system.

➤ C₃H₅N₃O₉ (Nitroglycerin) - tablet. 0.0005-0.008 g - used in heart failure.

➤ N₂O (Nitrous oxide) - 97% gas - for anesthesia.

➤ NaNO₂ - 0.1-0.2 g - spasmolytic effect.

➤ NH₄Cl - 2.5-5% aqueous solution - diuretic.

➤ HNO₃ - nitric acid - cauterizing agent.

➤ It is used in cryotherapy, cryodestruction, cryoconservation, cryodetoxification, and plasmolifting.

➤ It is used in nitrogen therapy for blood vessels in SPA procedures.

➤ Liquid N₂ causes severe burns to the skin.

➤ Inhalation of high concentrations of ammonia causes apnea.

➤ The antidote is to provide fresh air or oxygen.

➤ N₂ is released into the atmosphere from volcanic gases.

➤ At normal temperatures, nitrogen reacts only with Li.

➤ The presence of N₂ in the blood causes caisson disease.

➤ The first artificial Earth satellite was filled with nitrogen (October 4, 1957).

➤ Borazone B₃N₃H₆ is the hardest inorganic polymer.