Nitrogen oxides
From WikiLectures
A source of oxides nitrogen is burning , mainly at heating and cooking by gas . An oxide is formed nitrous NO which is converted on oxide nitrogenous NO2. In buildings , in which are used gas appliances , achieve concentrations of NO2 are higher concentration than in outdoor environment , including more than 10x.
thumb|right|110px|Nitric oxide thumb|right|300px|Nitrous oxide
Oxide nitrogenous NO2 is a gas soluble in tissues . In high concentrations damages pulmonary tissue . Alterations of the lungs functions occurs at concentration of NO2 above 4 mg/m3, in asthmatics already at 0.2 mg/m3. Children they are much more sensitive , respiratory symptoms appear _ already at concentration of NO2 0.09–0.5 mg/m3. cough , burning and dryness appear mucous membranes , shortness of breath , in more severe cases cases can develop edema of the lungs , even with a latency of 72 hours after exposure .
