helium-oxygen mixture

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• Helium — otherusesHelium (He) is a colorless, odorless, tasteless, non toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the… …   Wikipedia

• Oxygen toxicity — Classification and external resources In 1942–43 the UK Government carried out extensive testing for oxygen toxicity in divers. The chamber is pressurised with air to 3.7  …   Wikipedia

• Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …   Wikipedia

• helium — /hee lee euhm/, n. an inert, gaseous element present in the sun s atmosphere and in natural gas, and also occurring as a radioactive decomposition product, used as a substitute for flammable gases in dirigible balloons. Symbol: He; at. wt.:… …   Universalium

• Helium dilution technique — The helium dilution technique is the way of measuring the functional residual capacity of the lungs (the volume left in the lungs after normal expiration).This technique is a closed circuit system where a spirometer is filled with a mixture of… …   Wikipedia

• Liquid helium — Helium exists in liquid form only at very low temperatures. The boiling point and critical point depend on the isotope of the helium; see the table below for values. The density of liquid helium at its boiling point and 1 atm is approximately… …   Wikipedia

• Isotopes of oxygen — Late in a massive star s life, 16O concentrates in the O shell, 17O in the H shell and 18O in the He shell There are three stable isotopes of oxygen that lead to oxygen (O) having a standard atomic mass of 15.9994(3) u. 17 radioactive isotopes… …   Wikipedia

• liquid oxygen — Synonyms and related words: Dry Ice, Freon, ammonia, carbon dioxide, charge, coolant, ether, ethyl chloride, exhaust, freezing mixture, fuel, ice, ice cubes, jet propulsion, liquid air, liquid helium, propellant, propulsion charge, reaction… …   Moby Thesaurus

• Isobaric counterdiffusion — This article refers to ICD as it relates to tissue diffusion. For other uses of the term ICD, see ICD (disambiguation) Isobaric Counterdiffusion, Inert Gas Counterdiffusion , or ICD is the term used to describe the physiologic effect when the… …   Wikipedia

• Deep diving — The meaning of the term deep diving is a form of technical diving.[1] It is defined by the level of the diver s diver training, diving equipment, breathing gas, and surface support: in recreational diving, PADI define anything from 18 metres / 60 …   Wikipedia

• Breathing gas — is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other artificial gases, either pure gases or mixtures of gases, are used in breathing equipment and enclosed… …   Wikipedia