PAH or Pah may refer to:

Science and technology

Chemistry

Polycyclic aromatic hydrocarbon A polycyclic aromatic hydrocarbon (PAH) is a class of organic compounds that is composed of multiple aromatic rings. The simplest representative is naphthalene, having two aromatic rings and the three-ring compounds anthracene and phenanthrene. ...

, one of a class of chemical compounds, organic pollutants **

PAH world hypothesis The PAH world hypothesis is a speculative hypothesis that proposes that polycyclic aromatic hydrocarbons (PAHs), known to be abundant in the universe, including in comets, and assumed to be abundant in the primordial soup of the early Earth, playe ...

, hypothesis that proposes that the use of polycyclic aromatic hydrocarbons was a means for the origin of life *

Polyallylamine hydrochloride Polyallylamine hydrochloride (CAS No. 71550-12-4) is a cationic polyelectrolyte Polyelectrolytes are polymers whose repeating units bear an electrolyte group. Polycations and polyanions are polyelectrolytes. These groups dissociate in aqueous ...

, a polyelectrolyte used in polymer sheets *

Polyanhydrides {{No footnotes, date=July 2019 Polyanhydrides are a class of biodegradable polymers characterized by anhydride bonds that connect repeat units of the polymer backbone chain. Their main application is in the medical device and pharmaceutical industry ...

, a class of biodegradable polymers

Medicine

Para-aminohippurate Aminohippuric acid or ''para''-aminohippuric acid (PAH), a derivative of hippuric acid, is a diagnostic agent useful in medical tests involving the kidney used in the measurement of renal plasma flow. It is an amide derivative of the amino acid ...

, a substance used in the measurement of blood flow in the kidneys ** PAH clearance, Para-aminohippuric acid clearance, a measurement of renal plasma flow * Paradoxical adipose hyperplasia, a potential complication of cryolipolysis *

Phenylalanine hydroxylase Phenylalanine hydroxylase. (PAH) () is an enzyme that catalyzes the hydroxylation of the aromatic side-chain of phenylalanine to generate tyrosine. PAH is one of three members of the biopterin-dependent aromatic amino acid hydroxylases, a class ...

, an enzyme involved in breaking down phenylalanine * Primary alveolar hypoventilation, a condition of inadequate air movement in the lungs * Pulmonary arterial hypertension, a condition of elevated blood pressure in the pulmonary artery

Organizations

Plataforma de Afectados por la Hipoteca Plataforma de Afectados por la Hipoteca (PAH; Platform for People Affected by Mortgages) is a Spanish grassroots organization that takes direct action to stop evictions and campaigns for housing rights. The PAH was set up in Barcelona in February ...

, a Spanish housing rights organization * Polish Humanitarian Action, a Polish non-governmental organisation (Polish: Polska Akcja Humanitarna) *

Russian Academy of Sciences The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across ...

, Russian: Российская Академия Наук (РАН)

People

* Pah Wongso, born Victor Wijnhamer, Jr., (Chinese: 伯王梭; pinyin: Bó Wángsuō), an Indo social worker

Places

Pan-American Highway The Pan-American Highway (french: (Auto)route panaméricaine/transaméricaine; pt, Rodovia/Auto-estrada Pan-americana; es, Autopista/Carretera/Ruta Panamericana) is a network of roads stretching across the Americas and measuring about in to ...

* Pah, Gujarat, a village and former non-salute Rajput princely state in Gujarat, INdia *

Pah Homestead The Pah Homestead is a historic home located in the suburb of Hillsborough in Auckland, New Zealand. It is owned by the Auckland Council, and is currently used as an art gallery, housing the James Wallace Art Trust's collection of New Zealand ar ...

, a historic home in Hillsborough, Auckland, New Zealand *

Barkley Regional Airport Barkley Regional Airport is 14 miles west of Paducah, in McCracken County, Kentucky, United States. It is used for general aviation and sees one airline, subsidized by the Essential Air Service program. 100 people are employed at the airport. T ...

, Paducah, Kentucky, U.S., IATA airport code PAH * Pah-Ute County, Arizona Territory

Other

* Pah, the lunar deity in

Pawnee mythology Pawnee mythology is the body of oral history, cosmology, and myths of the Pawnee people concerning their gods and heroes. The Pawnee are a federally recognized tribe of Native Americans, originally located on the Great Plains along tributaries o ...

Pah Wraith The Bajorans (variously pronounced , , ) are a fictional species in the science-fiction ''Star Trek'' franchise. They are a humanoid extraterrestrial species native to the planet Bajor, who have a long-standing enmity with the Cardassians, owi ...

, in the fictional ''Star Trek'' universe {{disambiguation