Nitrogen is obtained from the atmosphere by passing air over heated copper or iron. Nitrogen exists in two natural forms of isotopes, and four radioactive isotopes have been artificially prepared. It is converted to an active form by passing through an electric discharge at low pressure.
Most of it is assimilated by soil micro-organisms and some of it is utilized by plants as a source of nitrogen. They are mainly rod shaped, but when isolated from nodules a variety of morphological shapes are observed. Nitrates are readily used by plants and many micro-organisms.
Legume seeds before planting are, therefore, inoculated with strains of Rhizobium of known effectiveness. Under anaerobic conditions and in presence of an abundant supply of organic compounds, which serve as hydrogen donors, nitrate serves as an electron acceptor.
The oxygen is removed from the air, leaving nitrogen mixed with some inert gases. Generally eight groups have been recognised. It is an important element in plant nutrition certain bacteria in the soil convert nitrogen from the atmosphere into a form, such as nitrate, that can be absorbed by plants, a process called nitrogen fixation.
However, if protein decomposition occurs under anaerobic condition, amino acids are converted to amines and related compound [putrefaction. Fraction one is known as electron donating and ATP generating system.
This is called pre-inoculation. This takes place during depletion of oxygen in the medium.
Nitrogen is inert and serves as a diluent for oxygen in burning and respiration processes. This process is called nitrate reduction and involves several reactions. Activated nitrogen returns to ordinary nitrogen in about one minute.
This combines with ammonia and some ammonium nitrate is brought to the soil. Uses Most of the nitrogen used in the chemical industry is obtained by the fractional distillation of liquid air. Nitrogen is the most important structural element of all living organisms.
The first step, the oxidation of ammonia to nitrite, is called nitrosification. Fortunately, nitrites are removed by further oxidation to nitrates by bacteria of the genus Nitrobacter.
A cell free preparation, made of two fractions, has been isolated from CI.Biological Nitrogen Fixation: The major share of nitrogen fixation is occupied by biological N 2 fixation. The biological N 2 fixation of atmospheric nitrogen depends on the nitrogenase enzyme system, composed of nitrogenase and nitrogenase reductase.
Nitrogen can be obtained from the atmosphere by passing air over heated copper or iron, which removes oxygen and leaves nitrogen and mixed gases.
Pure nitrogen is obtained from liquefied air through a process known as fractional distillation because nitrogen has a lower boiling point than oxygen and can distill off first so it can be collected.3/5(2). Nitrogen, Carbon and Phosphorus Cycles Essay - Nitrogen, Carbon and Phosphorus Cycles The carbon cycle deals with the interaction of carbon between living organisms and the nonliving environment.
This cycle is a process through which all carbon rotates. Nitrogen is an incredibly versatile element, existing in both inorganic and organic forms as well as many different oxidation states.
The movement of nitrogen between the atmosphere, biosphere, and geosphere in different forms is described by the nitrogen cycle (Figure 1), one of the major biogeochemical cycles. - Nitrogen as a Fertilizer, Nutrient, or Pollutant Nitrogen can always be a fertilizer, nutrient, or pollutant depending on the circumstances and the environment it is in.
As a fertilizer, nitrogen can be extremely useful in aiding the growth of many plants. Nitrogen compounds are also important to the making of drugs, dyes, explosives, poisons, and synthetic fibers. Nitrogen is one of .Download