Tracers are used

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• Organic molecular tracers — Organic molecular tracers, also referred to as organic molecular markers, are compounds or compound classes of interest in the field of air quality because they can help identify particulate emission sources, as they are relatively unique to… …   Wikipedia

• Tracer use in the oil industry — Tracers are used in the oil industry in order to qualitatively or quantitatively gauge how fluid flows through the reservoir, as well as being a useful tool for estimating residual oil saturation. Tracers can be used in either interwell tests or… …   Wikipedia

• Flow tracer — A flow tracer is any fluid property used to track flow. The concentration of a chemical compound in the fluid can be used as a chemical tracer, and characteristics such as temperature are physical tracers. Tracers may be artificially introduced,… …   Wikipedia

• labeled compounds — Tracer Tra cer, n. One who, or that which, traces. [1913 Webster] 2. A person engaged (esp. in the express or railway service) in tracing, or searching out, missing articles, as packages or freight cars. [Webster 1913 Suppl.] 3. An inquiry sent… …   The Collaborative International Dictionary of English

• Tracer — Tra cer, n. One who, or that which, traces. [1913 Webster] 2. A person engaged (esp. in the express or railway service) in tracing, or searching out, missing articles, as packages or freight cars. [Webster 1913 Suppl.] 3. An inquiry sent out (esp …   The Collaborative International Dictionary of English

• tracer ammunition — Tracer Tra cer, n. One who, or that which, traces. [1913 Webster] 2. A person engaged (esp. in the express or railway service) in tracing, or searching out, missing articles, as packages or freight cars. [Webster 1913 Suppl.] 3. An inquiry sent… …   The Collaborative International Dictionary of English

• Passage (novel) — infobox Book | name = Passage title orig = translator = image caption = Cover of first edition (hardcover) author = Connie Willis cover artist = country = United States language = English series = genre = Science fiction novel publisher = Bantam… …   Wikipedia

• water tracing —    Underground drainage links through unexplored caves confirmed by labeling input water and identifying it at points downstream. The common labeling techniques involve the use of fluorescent dyes (fluorescein, rhodamine, leucophor, pyranine… …   Lexicon of Cave and Karst Terminology

• Spider-Man's powers and equipment — The fateful spider bite that gave Peter Parker his powers. Amazing Fantasy #15, art by Steve Ditko. Spider Man s powers, abilities, and equipment are used by Marvel Comics superhero Spider Man in tandem to combat his many foes. He receives most… …   Wikipedia

• Semiconductor curve tracer — The Type 575 Transistor Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5 inch cathode ray tube. Several different transistor characteristic curves may be displayed, including the… …   Wikipedia

• Tracer ammunition — thumb|right|200px|Tracers from M16 rifles on U.S. Army firing rangeTracer ammunition (tracers) are special bullets that are modified to accept a small pyrotechnic charge in their base. Ignited upon firing, the composition burns very brightly,… …   Wikipedia