PO2(OH)

Po2, pO₂, , or PO2 may refer to: * A military rank: **

Petty Officer 2nd Class Petty officer second class (PO2) is a rank found in some navies and maritime organizations. Canada Petty officer, 2nd class, (PO 2), is a Naval non-commissioned member rank of the Canadian Forces. It is senior to the rank of master sailor (for ...

in the Canadian military **

Petty Officer Second Class Petty officer second class (PO2) is a rank found in some navies and maritime organizations. Canada Petty officer, 2nd class, (PO 2), is a Naval non-commissioned member rank of the Canadian Forces. It is senior to the rank of master sailor (f ...

in the United States military *

Polikarpov Po-2 The Polikarpov Po-2 (also U-2 before 1944, for its initial Glossary of Russian and USSR aviation acronyms: Aircraft designations, ''uchebnyy'', 'training', role as a flight instruction aircraft) was an all-weather multirole Soviet Union, Soviet b ...

or U-2, a Soviet aeroplane *

Partial pressure In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature. The total pressure of an ideal g ...

of Oxygen, that is, amount of oxygen in the blood (normally referred to as

Dissolved Oxygen Oxygen saturation (symbol SO2) is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium at the given temperature. It can ...

) * :

Phosphorus dioxide Phosphorus dioxide () is a gaseous oxide of phosphorus. It is a free radical that plays a role in the chemiluminescence of phosphorus and phosphine. It is produced when phosphates are heated to high temperatures. In the ground state the molecule ...

, a gaseous

free radical A daughter category of ''Ageing'', this category deals only with the biological aspects of ageing. Ageing Biogerontology Biological processes Causes of death Cellular processes Gerontology Life extension Metabolic disorders Metabolism ...

that plays a role in the

chemiluminescence Chemiluminescence (also chemoluminescence) is the emission of light (luminescence) as the result of a chemical reaction, i.e. a chemical reaction results in a flash or glow of light. A standard example of chemiluminescence in the laboratory se ...

phosphorus Phosphorus is a chemical element; it has Chemical symbol, symbol P and atomic number 15. All elemental forms of phosphorus are highly Reactivity (chemistry), reactive and are therefore never found in nature. They can nevertheless be prepared ar ...

and

phosphine Phosphine (IUPAC name: phosphane) is a colorless, flammable, highly toxic compound with the chemical formula , classed as a pnictogen hydride. Pure phosphine is odorless, but technical grade samples have a highly unpleasant odor like rotting ...

. * :

Polonide A polonide is a chemical compound of the radioactive element polonium with any element less electronegative than polonium. Polonides are usually prepared by a direct reaction between the elements at temperatures of around 300–400 °C... They a ...

anion * a

power of two A power of two is a number of the form where is an integer, that is, the result of exponentiation with number 2, two as the Base (exponentiation), base and integer as the exponent. In the fast-growing hierarchy, is exactly equal to f_1^ ...

in mathematics {{Letter-NumberCombDisambig