PTR can refer to:
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Particle transfer roller The particle transfer roller, often abbreviated to PTR, is a device for cleaning film stock, motion picture film. It consists of a cylindrical roller coated with ethyl carbamate, urethane, over which the surface of the film passes.
History
The part ...
, for cleaning motion picture film
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Peak-to-trough ratio
Peak-to-trough ratio (PTR), also known as peak-to-trough variation or peak-to-trough fluctuation, is a parameter in pharmacokinetics which is defined as the ratio of Cmax (peak) concentration and Cmin (trough) concentration over a dosing interv ...
, a parameter in pharmacokinetics
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Petir LRT station (LRT station abbreviation), Singapore
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PetroChina
PetroChina Company Limited () is a Chinese oil and gas company and is the listed arm of state-owned China National Petroleum Corporation (CNPC), headquartered in Dongcheng District, Beijing. The company is currently Asia's largest oil and ga ...
(NYSE: PTR)
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Photothermal Ratio, light/temperature ratio for a plant
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Physical transmission right in the electricity market
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Physikalisch-Technische Reichsanstalt
The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks. It is a higher federal authority and a public-law institution directly under fed ...
, later Physikalisch-Technische Bundesanstalt, a German research institute
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Pitrilysin
Pitrilysin (, ''Escherichia coli protease III'', ''protease Pi'', ''proteinase Pi'', ''PTR'', ''Escherichia coli metalloproteinase Pi'') is an enzyme. This enzyme catalyses the following chemical reaction:
: Preferential cleavage of -Tyr16- Leu- ...
, an enzyme
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Planar ternary ring
In mathematics, an algebraic structure (R,T) consisting of a non-empty set R and a ternary mapping T \colon R^3 \to R \, may be called a ternary system. A planar ternary ring (PTR) or ternary field is special type of ternary system used by Marsha ...
in algebra
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Pool Test Reactor
Pool Test Reactor (PTR) was a 10 kWt ordinary (light) water moderated pool-type reactor fueled with highly enriched uranium built at Chalk River in 1957. It used 93% enriched uranium-aluminum plate-type fuel. The reactor, was used for burnup meas ...
, Canada
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Proton-transfer-reaction mass spectrometry
Proton-transfer-reaction mass spectrometry (PTR-MS) is an analytical chemistry technique that uses gas phase hydronium ion, hydronium reagent ions which are produced in an ion source. PTR-MS is used for online monitoring of Volatile organic compoun ...
, used in chemical analysis
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PTR rifle
The PTR rifle is a family of modern, American-manufactured, semi-automatic rifles based on the Heckler & Koch G3 battle rifle. These rifles are produced by PTR Industries, Inc. of Aynor, South Carolina for the law enforcement and civilian market ...
, made by PTR Industries, Inc., US
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A type of DNS record in computer networking
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Pointer in computer programming (e.g. the PTR keyword in x86 assembly language)
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Palanivel Thiagarajan
Dr. Palanivel Thiagarajan (PTR) (born 7 March 1966) is an Indian politician and the current Minister of Information Technology and Digital Services of Tamil Nadu. He was elected to the Tamil Nadu Legislative Assembly election in 2016 and 2021 ...
, an Indian politician
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Puerto Rico
; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territo ...
, ITU country code
* Public Test Realm, a server in ''
Overwatch
''Overwatch'' (abbreviated as OW) is a multimedia franchise centered on a series of multiplayer first-person shooter (FPS) video games developed by Blizzard Entertainment. ''Overwatch (video game), Overwatch'' was released in 2016 with a success ...
'' where updates are tested by developers for player feedback
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PaRappa the Rapper
is a rhythm video game developed by NanaOn-Sha and published by Sony Computer Entertainment for the PlayStation. It was originally released in Japan in 1996 and worldwide in 1997. Created by music producer Masaya Matsuura in collaboration w ...
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