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Although carbon dioxide (CO 2) is known to be more narcotic than nitrogen – a rise in end-tidal alveolar partial pressure of CO 2 of 10 millimetres of mercury (13 mbar) caused an impairment of both mental and psychomotor functions of approximately 10% – [5] [2] the effects of carbon dioxide retention are not considered in these calculations, as the concentration of CO 2 in the supplied ...
The equivalent air depth (EAD) is a way of approximating the decompression requirements of breathing gas mixtures that contain nitrogen and oxygen in different proportions to those in air, known as nitrox. [1] [2] [3] The equivalent air depth, for a given nitrox mix and depth, is the depth of a dive when breathing air that would have the same ...
Enriched Air Nitrox" or "EAN", and "Oxygen Enriched Air" are used to emphasize richer than air mixtures. [3] In "EANx", the "x" was originally the x of nitrox, [11] but has come to indicate the percentage of oxygen in the mix and is replaced by a number when the percentage is known; for example, a 40% oxygen mix is called EAN40. The two most ...
ISO 13293 provides minimum training standards for gas blenders for recreational diving services at two levels. Level 1 gas blender is competent to blend nitrox and handle oxygen, air and nitrox, i.e. nitrox gas blender, and a level 2 gas blender is also competent to mix gases containing helium and argon, i.e, a trimix gas blender. [13]
In the event, the flight test was cancelled. Innovative Space Propulsion Systems had announced plans to test the NOFBX mono-propellant on the NASA portion of the International Space Station (ISS), with an initial tentative flight date no earlier than 2012. [3] NASA formally approved the mission to the ISS on a 2013 launch slot in May 2012. [4]
The method of mixing a known nitrox mix with helium allows analysis of the fractions of each gas using only an oxygen analyser, since the ratio of the oxygen fraction in the final mix to the oxygen fraction in the initial nitrox gives the fraction of nitrox in the final mix, hence the fractions of the three components are easily calculated.
The Poynting effect involves the dissolution of gaseous O 2 when bubbled through liquid N 2 O, with vaporisation of the liquid to form a gaseous O 2 /N 2 O mixture. [ 1 ] Inhalation of pure N 2 O over a continued period would deprive the patient of oxygen , [ 24 ] but the 50% oxygen content prevents this from occurring.
In which pO 2 is the chosen maximum partial pressure of oxygen in atmospheres absolute and the FO 2 is the fraction of oxygen in the mixture. For example, if a gas contains 36% oxygen (FO 2 = 0.36) and the limiting maximum pO 2 is chosen at 1.4 atmospheres absolute, the MOD in feet of seawater (fsw) [ Notes 1 ] is 33 fsw/atm x [(1.4 ata / 0.36 ...