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Glossary N

The Environmental Glossary. Letter N +++ Popular Articles: 'Nitrogen Oxides (NOx)', 'NRC', 'Nitrogen'

Nitrification

A Nitrification is the biochemical oxidation of ammonium to nitrate, predominantly by autotrophic bacteria.

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Nitrogen

Deutsch: Stickstoff / Español: Nitrógeno / Português: Azoto / Français: Azote / Italiano: Azoto
Nitrogen, symbol N, is the chemical element of atomic number 7. At room temperature, it is a gas of diatomic molecules and is colorless and odorless. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in our galaxy and the Solar System. On Earth, the element is primarily found as the free element; it forms about 80% of the Earth's atmosphere.

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Nitrogen cycle

A Nitrogen cycle is Cyclic movement of nitrogen in different chemical forms from the environment, to organisms, and then back to the environment.

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Nitrogen fixation

Deutsch: Stickstofffixierung / Español: Fijación de nitrógeno / Português: Fixação de nitrogênio / Français: Fixation de l'azote / Italiano: Fissazione dell'azoto /

A nitrogen fixation is the process in which Bacteria convert biologically unusable nitrogen gas (N2) into biologically usable ammonia (NH3) and Nitrates (NO3-).

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Nitrogen oxides

Deutsch: Stickoxide / Español: Óxidos de nitrógeno / Português: Óxidos de nitrogênio / Français: Oxydes d'azote / Italiano: Ossidi di azoto /

Nitrogen oxides are harmful gases (which contribute to Acid rain and global warming) emitted as a Byproduct of fossil fuel combustion.

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Nitrogen Oxides (NOx)

Nitrogen oxides (NOx) are compounds of nitrogen (N) and oxygen (O) in ambient air; i.e., nitric oxide (NO) and others with a higher oxidation state of N, of which NO2 is the most important toxicologically.

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Nitrous Oxide

A Nitrous Oxide (N2O) is a powerful greenhouse gas with a global warming potential most recently evaluated at 310. Major sources of nitrous oxide include soil cultivation practices, especially the use of commercial and organic fertilizers, fossil fuel combustion, nitric acid production, and biomass burning.

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No-Tillage

A No-Tillage is Crop production system in which the soil is left undisturbed from harvest to planting.

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NOCT

A NOCT is Nominal Operating Cell Temperature, the temperature at which Cells in a Module operate under Standard Operating Conditions (SOC), which are: irradiance of 0.8 kW/m2, 20_C ambient temperature, and average windspeed of 1 m/s, with the wind oriented parallel to the plane of the array, and all sides of the array fully exposed to the wind.

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Noise

Deutsch: Lärm / Español: Ruido / Português: Ruído / Français: Bruit / Italiano: Rumore

Noise in the environment context refers to unwanted or harmful sounds that can have adverse effects on human health, wildlife, and the quality of life. Environmental noise is a prevalent issue in many parts of the world, particularly in urban areas, where it originates from various sources such as traffic, industrial activities, construction sites, and public events. The impact of noise pollution extends beyond mere annoyance, potentially leading to more serious health and environmental consequences.

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