Nitrogenous organic substances

Non-nitrogenous organic substances are present in small quantity, the principal ones being glycogen (up to 1-5%), inositol, sarcolactic acid, butyric acid, etc. 

Maestrini, S.Y., Balode, M., Bechemin, C., and Purina, I. (1999) Nitrogenous organic substances as potential nitrogen sources, for summer phytoplankton in the Gulf of Riga, eastern Baltic Sea. Plankton Biol. Ecol. 46, 8-17. 

When reduced iron is heated with certain nitrogenous organic substances and metallic sodium, a cyanide is formed, the iron apparently acting as catalyser, being alternately oxidised and reduced.9 The presence of potassium cyanide m blast furnaces is thus readily accounted for. 

All three of the methyl amines are found naturally in herring brine, and in the dry distillation products of the residues obtained from fermented beet sugar molasses after it has been evaporated to drive off the alcohol and water. They also occur in certain plants and as the decomposition products of more complex nitrogenous organic substances such as morphine. 

This determination is a part of an analytical protocole of nitrogeneous organic substances used in our laboratory. These analytical techniques have already been published [9]so we only present here a brief discussion of this method. 

C. Le Cloirec, P. Le Cloiree, M. Elmghari, J. Morvan, G. Martin, Concentration and analysis of numerous nitrogenous organic substances in natural water, Int. J. Environ. Anal. Chem., 14, 127-145 (1983). 

Characteristic products from pyrolysis of nitrogenous organic substances Beitr. Tabakforsch. 6 (1972)... 

It is very slow to enter into combination, and most of its compounds are very prone to decomposition, which may occur explosively or slowly. Nitrogen combines directly Avith O under the Influence of electric discharges and with H under like conditions, and, indirectly, during the decomposition of nitrogenized organic substances. It combines directly with magnesium, boron, vanadium and titanium. 

Ammoniaeal compounds.—Carbonate, nitrate, and nitrite of ammonium occur in small quantity (0.1 to 6.0 parts j>er million of NHa) in air, as products of the decomposition of nitrogenized organic substances. They are absorbed and assimilated by plants. 

Potassium Nitrate—Nitre—Saltpetre—Potassii ultras (TJ. S.)— Potasses ultras (Br.)—KNO3—101—occurs in nature, and is pro-nitrogenized organic substances. It is usually obtained by decomposing native NaNOa by boiling solution of KjCOs or KCl. 

Etienne Ossian-Henry (Paris 27 November 1798-24 August 1873), director of the laboratory of the Academy of Medicine in Paris, published on the analyses of mineral waters, adulteration of wheat flour with potato starch, nitrogenous organic substances, the analysis of a biliary calculus free from cholesterin, and many papers of pharmaceutical interest. His a ysis of jalap showed that it contained resin, extract, starch, and woody fibre he also analyst horse-chesnut bark, which had been piopos as a substitute for quinine. 

Ammonia may be estimated by dissolving the gas in a known volume of standard acid and then back-titrating the excess acid. In a method widely used for the determination of basic nitrogen in organic substances (the Kjeldahl method), the nitrogenous material is converted into ammonium sulphate by heating with concentrated sulphuric acid. The ammonia is then driven off by the action of alkali and absorbed in standard acid. 

The table below gives the lowest temperature that can be obtained from a mixture of the inorganic salt with finely shaved dry ice. With the organic substances, dry ice (—78°C) in small lumps can be added to the solvent until a slight excess of dry ice remains or liquid nitrogen (—196°C) can be poured into the solvent until a slush is formed that consists of the solid-liquid mixture at its melting point. 

Atmosphere—Water Interaction. Although water is a very minor component of the atmosphere, less than 10 vol % of the atmosphere consisting of water, many important reactions occur ki the water droplets of cloud, fog, and rain. The atmosphere is an oxic environment ki its water phase, gigantic quantities of reductants, such as organic substances, Fe(II), SO2, CH SCH (dimethyl sulfide), and nitrogen oxides, are oxidized by oxidants such as oxygen, OH radicals, H2O2, and Fe(III). 

Chemical analyses can measure the total quantities of N, P and K in FYM but not their availability to the crop. At most, all of the N in FYM is combined with organic substances and is released only when they decay in practice about a third of the nitrogen is released quite quickly, but much is very resistant and persists in the soil. Much of the phosphorus is also combined with the organic matter but approximately half is quickly available. Most of the potassium is soluble in water and is quickly available to the crop. 

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