dioxide$21473$ - ορισμός. Τι είναι το dioxide$21473$
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Τι (ποιος) είναι dioxide$21473$ - ορισμός

CHEMICAL COMPOUND
Tungsten dioxide

Titanium dioxide nanoparticle         
NANOMATERIAL
Draft:Titanium dioxide nanoparticle; Ultrafine titanium dioxide
Titanium dioxide nanoparticles, also called ultrafine titanium dioxide or nanocrystalline titanium dioxide or microcrystalline titanium dioxide, are particles of titanium dioxide () with diameters less than 100 nm. Ultrafine is used in sunscreens due to its ability to block ultraviolet radiation while remaining transparent on the skin.
sulphur dioxide         
  • An experiment showing burning of sulfur in [[oxygen]]. A flow-chamber joined to a gas washing bottle (filled with a solution of [[methyl orange]]) is being used. The product is sulfur dioxide (SO<sub>2</sub>) with some traces of [[sulfur trioxide]] (SO<sub>3</sub>). The "smoke" that exits the gas washing bottle is, in fact, a sulfuric acid fog generated in the reaction.
  • US Geological Survey]] volunteer tests for sulfur dioxide after the [[2018 lower Puna eruption]].
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  • A collection of estimates of past and future anthropogenic global sulfur dioxide emissions. The Cofala et al. estimates are for sensitivity studies on SO<sub>2</sub> emission policies, CLE: Current Legislation, MFR: Maximum Feasible Reductions. RCPs (Representative Concentration Pathways) are used in CMIP5 simulations for latest (2013–2014) IPCC 5th assessment report.
  • The blue auroral glows of Io's upper atmosphere are caused by volcanic sulfur dioxide.
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  • Two resonance structures of sulfur dioxide
¦ noun Chemistry a colourless pungent toxic gas formed by burning sulphur. [SO2.]
Carbon dioxide sensor         
  • {{CO2}} concentration meter using a [[nondispersive infrared sensor]]
INSTRUMENT FOR THE MEASUREMENT OF CARBON DIOXIDE GAS
CO2 sensor; CO₂ sensor; Carbon dioxide detector; CO2 meter; CO2 monitor; Carbon dioxide monitor; Carbon dioxide meter
A carbon dioxide sensor or CO2 sensor is an instrument for the measurement of carbon dioxide gas. The most common principles for CO2 sensors are infrared gas sensors (NDIR) and chemical gas sensors.

Βικιπαίδεια

Tungsten(IV) oxide

Tungsten(IV) oxide is the chemical compound with the formula WO2. The bronze-colored solid crystallizes in a monoclinic cell. The rutile-like structure features distorted octahedral WO6 centers with alternate short W–W bonds (248 pm). Each tungsten center has the d2 configuration, which gives the material a high electrical conductivity.

WO2 is prepared by reduction of WO3 with tungsten powder over the course of 40 hours at 900 °C. An intermediate in this reaction is the partially reduced, mixed valence species W18O49.

2 WO3 + W → 3 WO2

The molybdenum analogue MoO2 is prepared similarly. Single crystals are obtained by chemical transport technique using iodine. Iodine transports the WO2 in the form of the volatile species WO2I2.