Oxygen

Your body can’t live without the oxygen you Do I Need It? Home oxygen therapy can help with many conditions, including: • • • • • • • • • • How Much Will I Need? Your doctor will give you a prescription that spells out how much oxygen you need per minute and when you need to get it. Some people may need oxygen therapy only when they Your doctor will figure out how much extra oxygen you need after they check your usual levels, either with a Equipment You can get oxygen in several ways. The best choice for you depends on how much you need, your lifestyle, and other things. Standard oxygen concentrator. This machine has a motor and runs on electricity or sometimes batteries. It takes in regular air and filters out other gases to get the oxygen. It weighs about 50 pounds and usually has wheels so you can move about while you’re hooked up to it. If you have the plug-in kind, you’ll need a backup source of oxygen in case the power goes out. Portable oxygen concentrator. This is a good choice for when you run errands or go to work. It weighs 3-20 pounds so you can carry it. You can plug some models into your car or run them on battery packs. Liquid oxygen tank. Usually, oxygen is a gas. But at lower temperatures it becomes a liquid. It takes up less space than gas, so you can store a lot more liquid oxygen in a thermos-like tank. When it comes out, the liquid converts to a gas right away so you can breathe it in. A tank can weigh more than 100 pounds, and you need to refill it ev...

oxygen, Gaseous chemical 2. In 2). In photosynthesis, green plants assimilate carbon dioxide in the presence of sunlight and give off oxygen. The small amount of oxygen that dissolves in water is essential for the respiration of fish and other aquatic life. Oxygen takes part in combustion and in corrosion but does not itself burn. It has valence 2 in compounds; the most important is Related Article Summaries

Just the Facts • Atomic Number (number of protons in the nucleus): 8 • Atomic Symbol (on the Periodic Table of Elements): O • Atomic Weight (average mass of the atom): 15.9994 • Density: 0.001429 grams per cubic centimeter • Phase at Room Temperature: Gas • Melting Point: minus 361.82 degrees Fahrenheit (minus 218.79 degrees Celsius) • Boiling Point: minus 297.31 degrees F (minus 182.95 degrees C) • Number of isotopes (atoms of the same element with a different number of neutrons): 11; three stable • Most common isotopes: O-16 (99.757 percent natural abundance) Breath of life Oxygen is the third most abundant element in the universe, according to the Photosynthesis by cyanobacteria was likely ongoing before significant levels of oxygen built up in Earth's atmosphere; a March 2014 study published in the journal Nature Geoscience found that 2.95 billion-year-old rocks found in South Africa contained oxides that would have required free oxygen to form. These rocks were originally in shallow seas, suggesting that oxygen from photosynthesis first began to accumulate in marine environments about half a billion years before it began to accumulate in the atmosphere around 2.5 billion years ago. Life today depends heavily on oxygen, but the initial build-up of this element in the atmosphere was nothing short of a disaster. The new atmosphere caused a mass extinction of anaerobes, which are organisms that don't require oxygen. Anaerobes that were unable to adapt or survive in the pr...

Medicinal oxygen is an essential medicine with no substitution. Healthcare professionals use it to treat respiratory diseases like COVID-19 and pneumonia. It is administered to patients as an inhalation gas. Solely medicinal oxygen shall be applied to patients. Compared to industrial oxygen, medicinal oxygen is tested to meet authorized specifications for its identity, purity and content and is produced, stored and distributed following good manufacturing practices for patient safety. Oxygen systems must consist of an oxygen source, or production , combined with storage and distribution . Medicinal oxygen can be produced by the air-liquefaction process or by pressure swing adsorption. Depending on the source and production method, the medical oxygen has the following characteristics: • By the air-liquefaction process – according to the International Pharmacopoeia and to the Revision of the monograph on Oxygen for inclusion in The International Pharmacopoeia (October 2021) medicinal oxygen produced by air-liquefaction must contain not less than 99.5% V/V of O 2. Cryogenically produced liquid oxygen is always generated off-site (not at a medical facility). • By Pressure Swing Adsorption (PSA) plants– according to the Revision of the monograph on Oxygen for inclusion in The International Pharmacopoeia (October 2021) and to WHO interim guidance technical specifications for PSA plants (June 2020), pressure swing adsorption technology produces medical oxygen with 93%±3% O 2 from...

Glossary Group A vertical column in the periodic table. Members of a group typically have similar properties and electron configurations in their outer shell. Period A horizontal row in the periodic table. The atomic number of each element increases by one, reading from left to right. Block Elements are organised into blocks by the orbital type in which the outer electrons are found. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). Atomic number The number of protons in an atom. Electron configuration The arrangements of electrons above the last (closed shell) noble gas. Melting point The temperature at which the solid–liquid phase change occurs. Boiling point The temperature at which the liquid–gas phase change occurs. Sublimation The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Density (g cm −3) Density is the mass of a substance that would fill 1 cm 3 at room temperature. Relative atomic mass The mass of an atom relative to that of carbon-12. This is approximately the sum of the number of protons and neutrons in the nucleus. Where more than one isotope exists, the value given is the abundance weighted average. Isotopes Atoms of the same element with different numbers of neutrons. CAS number The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from diff...