The process by which ammonia is changed to nitrite, then nitrate. Also called the nitrogen cycle. Ammonia created by urea and decomposition is turned into nitrites by nitrosomas bacteria. Nitrites are converted to nitrates by nitrobacter.
The process by which ammonia formed by the bacterial decay of marine organisms or excreted by marine animals is oxidized to nitrite and then nitrate. It is inhibited by light and proceeds very slow if at all in the euphotic zone. See Najjar (1991).
The biochemical oxidation of ammoium to nitrate, mainly by autotrophic bacteria e.g. Nitrosammonas and Nitrobacter
Formation of nitrates from organic and ammonia forms. The conversion of ammonia to nitrate.
The conversion of nitrites to nitrates, usually by microorganisms. The term is commonly used to describe the process of conversion of ammonium ions via nitrites to nitrates.
the conversion of ammonia to nitrate by bacteria in the sod.
( Ped). The process by which nitrites and nitrates are formed in the soil by the action of certain aerobic bacteria from ammonium salts which are derived by the action of certain other aerobic and anaerobic micro organism on decaying vegetable residue. Cf. Denitrification.
A chemical process in which nitrogen in plant and animal wastes and dead remains is oxidized, first to nitrites and then to nitrates.
This is the process in which the nitrogen cycle works. Ammonia is created by urea and decomposition. Ammonia is turned into nitrites by nitrosomonas bacteria. Nitrites are less harmful than bacteria, but still pose a threat. Nitrites are converted to nitrates by nitrobacter. Nitrates are much less toxic and is used as fertilizer for live plants. It is harmful in great quantities, however, and should be avoided in the reef tank. There are special denitrifying filters which convert nitrates to nitrogen gas, which is explosive in high quantities.
The oxidation of ammonia to nitrite and nitrate ions, performed by certain soil bacteria.
The biological oxidation of ammonia and ammonium sequentially to nitrite and then nitrate. It occurs naturally in surface waters, and can be engineered in wastewater treatment systems. The purpose of nitrification in wastewater treatment systems is a reduction in the oxygen demand resulting from the ammonia.
the process to which bacterial populations under aerobic conditions, gradually oxidize ammonium to nitrate with the intermediate formation of nitrite. Biological nitrification is a key step in nitrogen removal in wastewater treatment systems.
the process in which ammonia is oxidized by bacteria and becomes nitrate. Nitrogen - the most abundant element in the atmosphere of the earth, and an essential element in all living organisms.
the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)
A biological process, during which nitrifying bacteria convert toxic ammonia to less harmful nitrate. It is commonly used to remove nitrogen substances from wastewater, but in lakes and ponds it occurs naturally.
The formation of nitrites and nitrates from ammonia and ammonia compounds by soil bacteria and enzymes.
An aerobic process in which bacteria change the ammonia and organic nitrogen in wastewater in oxidized nitrogen (usually nitrate).
The process where ammonia is converted to Nitrite (NO2) and eventually to Nitrate (NO3).
The oxidation of ammonia to nitrate and nitrite, yielding energy for decomposing organisms.
The process whereby ammonia in wastewater is oxidized to nitrite and then to nitrate by bacterial or chemical reactions.
The process in which soil-dwelling bacteria oxidize ammonia, NH3, into nitrite, NO2 Ã, and nitrate NO3Ã.
The oxidation of ammonia-nitrogen to nitrate-nitrogen in wastewater by biological or chemical reactions.
the conversion of ammonium in the soil to nitrate with the release of H+ ions.
Process by which soil organisms, 'nitrifiers', use oxygen to convert ammonium ions to nitrate ions.
The biochemical oxidation ofammonium to nitrate.
The conversion of nitrogen matter into nitrates by bacteria.
The process by which ammonia is changed to nitrite, then nitrate, and finally nitrogen gas. See nitrogen cycle.
The biochemical oxidation of ammonium to nitrate
breakdown of nitrogen-containing organic compounds into inorganic nitrate (NO) and nitrite (NO).
The biological or chemical transformation of ammonium nitrogen to nitrate nitrogen.
breakdown of nitrogen containing organic compounds into nitrites and nitrates
Microbial oxidation of ammonium nitrogen to nitrites and eventually to nitrates.
This is the process in which bacteria oxidize lethal ammonia into relatively harmless nitrates. Ammonia is created by urea and decomposition. Ammonia is oxidized into nitrites by nitrosomonas bacteria. Nitrites are converted to nitrates by nitrobacter. Nitrates are much less toxic, but are potentially harmful in great quantities and should be avoided in the reef tank. There are special denitrifying filters which convert nitrates to nitrous oxide and nitrogen gases...(see denitrification)
the process where ammonium is converted to nitrate nucleotides a compound consisting of a base, a phosphate group, and a sugar. DNA and RNA are linear chains (polymers) of nucleotides
The conversion in the soil of ammonium ions into nitrate ions by the action of certain bacteria ( Nitrosomonas and Nitrobacter).
The conversion of ammonia (NH3) to nitrate (NO3-).
Sequential oxidation of ammonium salts to nitrite and nitrate by micro-organisms
The process by which bacteria converts ammonia into nitrite and then nitrite into nitrate. This is the basis of the nitrogen cycle.
A process accomplished by a few groups of aerobic organisms in which ammonia is converted to nitrite and then nitrate.
The biological oxidation of ammonium salts to nitrites and the further oxidation of nitrites to nitrates.
The process of converting reduced nitrogen (as ammonia or ammonium) to its more oxidized forms (nitrite or nitrate ions). It is a two-step process, with each step carried out by distinct groups of bacteria. The first step is the oxidation of ammonia to nitrite, and the second is oxidation of nitrite to nitrate.
Nitrification is the process of conversion of nitrogen compounds (primarily ammonia) to nitrates and nitrites (from NH3 to NO or NO2). This occurs naturally in water treatment systems. Denitrification is the process of converting the nitrate/nitrite to free oxygen. It can be accomplished in water treatment by recycling the effluent to the first chamber which is oxygen poor, with the releases of oxygen and nitrogen as gases. The nitrate/nitrite compounds are not normally harmful but in high concentrations they can be harmful to fish.
The biochemical transformation of ammonium nitrogen to nitrate nitrogen.
Nitrification is the biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites into nitrates. Nitrification is an important step in the nitrogen cycle in soil. This process was discovered by the Russian microbiologist, Sergei Winogradsky.