labeled compounds

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 out (esp. in transportation service) for a missing article, as a letter or an express package. [Webster 1913 Suppl.]

4. (Mil.) a type of ammunition that emits light or smoke as it moves toward its target, providing a visible path of the projectile in flight so that the point of impact may be observed; -- called also {tracer ammunition}. [PJC]

5. (Mil.) the chemical substance used in tracer ammunition to cause it to be visible in flight. [PJC]

6. a chemical substance with properties, such as radioactivity or fluorescence, which make it easily measurable, used to observe the movements of chemically related substances through a biological, physical, or chemical system; -- in biochemistry, also called {labeled compounds}.

Note: Radioactive tracers are used, for example, to measure the retention or distribution of residues of drugs after administration to an animal, to determine the type and rate of metabolism; also, to measure the rate of motion of molecules in electrophoresis or the leakage of small quantities of material from a container. Small fluorescent tracers may be attached in many cases to macromolecules such as proteins or nucleic acids, allowing the motions of such macromolecules to be easily observed by their acquired fluorescence, without appreciably changing their properties. In biological and biochemial systems the common radioactive isotopes used in tracers are carbon-14, tritium (hydrogen-3), sulfur-35, phosphorus-32, and iodine-131; other isotopes are also used, including non-radioactive isotopes such as carbon-13. [PJC]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Lily Young — in New Brunswick. [ [http://www.cook.rutgers.edu/ biotech/FACULTY/YOUNG.HTML Lily Young’s research interests] ] She is a member of the Biotechnology Center for Agriculture and the Environment (Biotech Center) and has her academic appointment in… …   Wikipedia

  • Autoradiogram — Au to*ra di*o*gram, n. [Auto + radiogram.] (Biochemistry) an image produced upon photographic film by exposure of the film to a radioactive substance in close proximity to (usually in contact with) the film. Note: Recording the distribution of… …   The Collaborative International Dictionary of English

  • Cerilliant Corporation — Type Private Founded (incorporated 2000 (2000)) Headquarters 811 Paloma Drive, Suite A Round Ro …   Wikipedia

  • radiochemistry — 1. The science of using radionuclides to synthesize labeled compounds for biochemical or biologic research, or radiopharmaceuticals for clinical diagnostic studies. 2. The study of methods of labeling compounds with radionuclides. 3. The science… …   Medical dictionary

  • 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

  • Ligand (biochemistry) — Myoglobin (blue) with its ligand heme (orange) bound. Based on PDB 1MBO For other uses of Ligand , see Ligand (disambiguation). In biochemistry and pharmacology, a ligand (from the …   Wikipedia

  • SINAP — National System of Protected Areas (Spanish: Sistema Nacional de Áreas Protegidas ) SINAP, is the Nicaraguan National Parks administrator, and is part of the Nicaraguan Ministry of Environment and Natural Resources (MARENA). SINAP is entrusted to …   Wikipedia

  • chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

  • Chemical biology — is a scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems.… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”