a reddish-brown, highly poisonous gas, NO 2 , used as an intermediate in the manufacture of nitric and sulfuric acids, and as a nitrating and oxidizing agent; a major air pollutant from the exhaust of internal combustion engines that are not fitted with pollution control devices.
a red-brown poisonous irritating gas that, at ordinary temperatures, exists in equilibrium with dinitrogen tetroxide. It is an intermediate in the manufacture of nitric acid, a nitrating agent, and also an oxidizer for rocket fuels. Formula: NO2
- Nitrogen distribution
nitrogen distribution n. See nitrogen partition.
- Nitrogen equivalent
nitrogen equivalent n. The nitrogen content of protein, used in calculating the grams of protein metabolized by the body as a function of the grams of nitrogen excreted in the urine.
noun 1. any process of combining atmospheric nitrogen with other elements, either by chemical means or by bacterial action: used chiefly in the preparation of fertilizers, industrial products, etc. 2. this process as performed by certain bacteria found in the nodules of leguminous plants, which make the resulting nitrogenous compounds available to their host plants. […]
noun 1. any of various microorganisms in the soil involved in the process of nitrogen fixation.