PTR can refer to:
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Particle transfer roller The particle transfer roller, often abbreviated to PTR, is a device for cleaning motion picture film. It consists of a cylindrical roller coated with urethane, over which the surface of the film passes.
History
The particle transfer roller was de ...
, 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 inter ...
, 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 gas pr ...
(NYSE: PTR)
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Photothermal Ratio, light/temperature ratio for a plant
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Physical transmission right Electricity transmission congestion is a condition of the electrical grid that prevents the accepted or forecasted load schedules from being implemented due to the grid configuration and equipment performance limitations. In simple terms, congestio ...
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 algebra
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Pool Test Reactor, 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 reagent ions which are produced in an ion source. PTR-MS is used for online monitoring of volatile organic compounds (VOCs) in a ...
, 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 marke ...
, 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, an Indian politician
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