PTR can refer to:
*
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 deve ...
, 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
The Bukit Panjang LRT (BPLRT) is a automated guideway transit line in Bukit Panjang, Singapore. The BPLRT is currently the only LRT line operated by SMRT Trains. As the name suggests, it serves 13 stations in the neighbourhood of Bukit Panjan ...
(LRT station abbreviation), Singapore
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PetroChina (NYSE: PTR)
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Photothermal Ratio, light/temperature ratio for a plant
*
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, congestion ...
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 Mars ...
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 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 mar ...
, made by PTR Industries, Inc., US
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A type of DNS record in computer networking
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Pointer
Pointer may refer to:
Places
* Pointer, Kentucky
* Pointers, New Jersey
* Pointers Airport, Wasco County, Oregon, United States
* The Pointers, a pair of rocks off Antarctica
People with the name
* Pointer (surname), a surname (including a list ...
in computer programming (e.g. the PTR keyword in x86 assembly language)
*
Palanivel Thiagarajan
Palanivel Thiagarajan (PTR) is an Indian politician and the current Finance Minister of Tamil Nadu. He was elected to the Tamil Nadu Legislative Assembly election in 2016 and 2021 from Madurai Central.
Early life
He is the son of the late P. ...
, an Indian politician
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