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  2. NOx - Wikipedia

    en.wikipedia.org/wiki/NOx

    In atmospheric chemistry, NOx is shorthand for nitric oxide (NO) and nitrogen dioxide (NO2), the nitrogen oxides that are most relevant for air pollution. [1][2] These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone. NOx gases are usually produced from the reaction between nitrogen and oxygen ...

  3. Nitrous oxide - Wikipedia

    en.wikipedia.org/wiki/Nitrous_oxide

    Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, factitious air, among others, [4] is a chemical compound, an oxide of nitrogen with the formula N. 2O. At room temperature, it is a colourless non-flammable gas, and has a slightly sweet scent and taste. [4]

  4. Selective catalytic reduction - Wikipedia

    en.wikipedia.org/wiki/Selective_catalytic_reduction

    Selective catalytic reduction (SCR) means converting nitrogen oxides, also referred to as NO. x with the aid of a catalyst into diatomic nitrogen (N. 2), and water (H. 2O). A reductant, typically anhydrous ammonia (NH. 3), aqueous ammonia (NH. 4OH), or a urea (CO (NH. 2)

  5. Nitrogen cycle - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_cycle

    The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation ...

  6. Nitric acid - Wikipedia

    en.wikipedia.org/wiki/Nitric_acid

    Nitric acid is an inorganic compound with the formula H N O 3. It is a highly corrosive mineral acid. [6] The compound is colorless, but samples tend to acquire a yellow cast over time due to decomposition into oxides of nitrogen. Most commercially available nitric acid has a concentration of 68% in water.

  7. Fantastic Beasts and Where to Find Them (film) - Wikipedia

    en.wikipedia.org/wiki/Fantastic_Beasts_and_Where...

    Fantastic Beasts and Where to Find Them is a 2016 fantasy film directed by David Yates and written by J. K. Rowling.It is the first instalment in the Fantastic Beasts film series and the ninth overall in the Wizarding World franchise, serving as a spin-off of and prequel to the Harry Potter film series; it is inspired by the 2001 guide book of the same name by Rowling.

  8. Ground-level ozone - Wikipedia

    en.wikipedia.org/wiki/Ground-level_ozone

    Ozone is least concentrated in the ground layer (or planetary boundary layer) of the troposphere. Ground-level or tropospheric ozone is created by chemical reactions between NOx gases (oxides of nitrogen produced by combustion) and volatile organic compounds (VOCs). The combination of these chemicals in the presence of sunlight form ozone.

  9. Nox Arcana - Wikipedia

    en.wikipedia.org/wiki/Nox_Arcana

    Nox Arcana is the American neoclassical dark wave, dark ambient musical project of Joseph Vargo. It was founded in 2003 as a duo with William Piotrowski, who left in 2008 to pursue a career in film score composing but still acts as its studio engineer and additional instrumentalist whereas Vargo continued on as a solo act under the name.