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  2. Gastric antral vascular ectasia - Wikipedia

    en.wikipedia.org/wiki/Gastric_antral_vascular...

    A treatment used sometimes is endoscopic band ligation. [27] In 2010, a team of Japanese surgeons performed a "novel endoscopic ablation of gastric antral vascular ectasia". [10] The experimental procedure resulted in "no complications". [10] Relapse is possible, even after treatment by argon plasma coagulation and progesterone. [21]

  3. Weld purging - Wikipedia

    en.wikipedia.org/wiki/Weld_purging

    Unwanted gas is generally removed by flushing with an inert gas. Argon is generally used for this purpose but helium is an alternative depending on gas cost and availability. Nitrogen has been used as a purge gas but is unsuitable for some stainless steels. The most common way to remove gas from the weld zone is to flush it away with an inert ...

  4. Cryogenic gas plant - Wikipedia

    en.wikipedia.org/wiki/Cryogenic_gas_plant

    A cryogenic gas plant is an industrial facility that creates molecular oxygen, molecular nitrogen, argon, krypton, helium, and xenon at relatively high purity. [1] As air is made up of nitrogen, the most common gas in the atmosphere, at 78%, with oxygen at 19%, and argon at 1%, with trace gasses making up the rest, cryogenic gas plants separate air inside a distillation column at cryogenic ...

  5. Inert gas asphyxiation - Wikipedia

    en.wikipedia.org/wiki/Inert_gas_asphyxiation

    The normal composition of the Earth's atmosphere is about 78% nitrogen, 21% oxygen, and 1% argon, carbon dioxide, and other gases. After just two or three breaths of nitrogen, the oxygen concentration in the lungs would be low enough for some oxygen already in the bloodstream to exchange back to the lungs and be eliminated by exhalation.

  6. Plasma cleaning - Wikipedia

    en.wikipedia.org/wiki/Plasma_cleaning

    Fig. 1. The surface of a MEMS device is cleaned with bright, blue oxygen plasma in a plasma etcher to rid it of carbon contaminants. (100mTorr, 50W RF) Plasma cleaning is the removal of impurities and contaminants from surfaces through the use of an energetic plasma or dielectric barrier discharge (DBD) plasma created from gaseous species.

  7. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    A blowout preventer (BOP) (pronounced B-O-P) [1] is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a well. They are usually installed in stacks of other valves.

  8. Air purge system - Wikipedia

    en.wikipedia.org/wiki/Air_purge_system

    An air purge heating unit is used to ensure that the purge air remains at a temperature above the acid dew-point. This temperature is typically around 20 °C/68 °F. [2] If temperatures are below this point, the controls will be corroded by condensation of compounds in the flue gas. Heated air ensures that controls are dry during startup. [3]

  9. Argon plasma coagulation - Wikipedia

    en.wikipedia.org/wiki/Argon_plasma_coagulation

    Argon plasma coagulation (APC) is a medical endoscopic procedure used to control bleeding from certain lesions in the gastrointestinal tract. It is administered during gastrointestinal endoscopy such as esophagogastroduodenoscopy or colonoscopy .