what is the scientific test for oxygen?
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Put the lighted end of a glowing splinter into a test tube containing the subject gas. If it burns or bursts into flames, you have oxygen in there. But if the splinter makes a pop, you have hydrogen instead. If it is extinguished, you got carbon dioxide
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You need to be a little more specific. Would that be in water quality, oxygen in blood, or soil? To measure water quality they just use dissolved oxygen meter, which exploits the electrochemical properties of the water. Or you could do a Winkler titration.
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The boiling point of oxygen is -183°C, or 90°K (-297°F).\n\nThe melting point of oxygen is -218.4°C, or 54.8°K  (-361.1°F)
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Oxygen Sensor - an electronic device that measures the proportion of oxygen in the gas.
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your O2 saturation rate is the % of oxygenated blood running through your body. Normal is around 98% to 99%
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Oxygen Facts\nAtomic Number  8\nSymbol  O\nAtomic Weight  15.9994 \nDiscovery  Joseph Priestley; Scheele 1774. \nElectron Configuration  [He]2s22p4 \nWord Origin  Greek: oxys: sharp or acid and Greek: genes: born, former... 'acid former'. \nIsotopes  Nine isotopes of oxygen are known. Natural oxygen is a mixture of three isotopes. \nProperties  Oxygen gas is colorless, odorless, and tasteless. The liquid and solid forms are a pale blue color and are strongly paramagnetic. Oxygen supports combustion, combines with most elements, and is a component of hundreds of thousands of organic compounds. Ozone (O3), a highly active compound with a name derived from the Greek word for 'I smell', is formed by the action of an electrical discharge or ultraviolet light on oxygen. \nUses  Oxygen was the atomic weight standard of comparison for the other elements until 1961 when the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis. It is the third most abundant element found in the sun and the earth, and it plays a part in the carbon-nitrogen cycle. Excited oxygen yields the bright red and yellow-green colors of the Aurora. Oxygen enrichment of steel blast furnaces accounts for the greatest use of the gas. Large quantities are used in making synthesis gas for ammonia, methanol, and ethylene oxide. It is also used as a bleach, for oxidizing oils, for oxy-acetylene welding, and for determining carbon content of steel and organic compounds. Plants and animals require oxygen for respiration. Hospitals frequently prescribe oxygen for patients. Approximately two thirds of the human body and nine tenths of the mass of water is oxygen. \n\nOxygen can exist in a number of physical forms. Most commonly it is found as a diatomic O-O gas and is called molecular oxygen (O2) or dioxygen. The gas exists as a triplet state but the singlet oxygen can also be formed and is more reactive. This gas can be liquefied at low temperatures to produce a blue liquid oxygen (LOX) and cooled further produces a blue solid. After electrical discharge or photolysis Oxygen may also form the triatomic ozone (O3) and under very extreme conditions atomic oxygen (O•) is produced.
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Several ways to do this. The first that occurs to me is to have the mammalian cell culture in a sealed chamber and measure the gases via IR spectroscopy in the chamber. The loss of oxygen in the gas of the chamber would be the uptake. Such methods are quite sensitive.
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Several companies make packs that generate CO2 and N once opened.  They also bind atmospheric oxygen (O2).  If you plate your specimen on an anaerobic media, then place the media in an airtight container with one of these packs, you should acheive the appropriate environment. (You can use an anaerobic indicator to make sure that you've acheived the right air mix.)\n\nWhile plating the organisms, be sure to be quick.  Some organisms are killed by O2, so the longer it takes you to plate them, the more chance there is for O2 to get in and damage them.
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Oxygen\nWater\nFood\nSunlight\nLove
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The abbreviation for Oxygen is O2 (O subscript 2) because it is diatomic, which means that you find 2 oxygen molecules together naturally.
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Air is about 20% elemental O2.\n\nhttp://www.mountainflying.com/oxygen.htm This site says 21%\nAnd this site:http://www.pubquizhelp.34sp.com/sci/air.html has a nice chart on it.
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Medical oxygen probably has to be USP (United States Pharmacoepia) grade, which means there's a long list of things it can't contain.  It might also have to be dry, but I'm not sure on that one.
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dioxygen is the most common molecule that contains oxygen.  \ncarbon dioxyde, for example has two oxygens and one carbon molecule.
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are you sure you are not on something stronger than oxygen?
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First, suspend 2 test tubes full of water upside-down in a beaker filled with water (be careful not to let any air get in the test tube). Second, put a copper wire into each test tube and have it run over the side of the beaker (make sure the copper wire doesn't touch the bottom of the beaker). Finally, attach one copper wire to the positive side of a 9-volt battery and the other wire to the negative side and let it sit overnight. The test tube that has the most gas is the one with hydrogen gas and the other one has oxygen gas.
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Yup, oxygen oxidises our bodies. As we are carbon based lifeform, we lose carbon when we breathe out - hence, carbon dioxide.
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It is an enzyme that can counteract the damagging effects of oxygen in tissues. Like the vitamin E.