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Topic: Isotope

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  What is an Isotope?
An isotope is a variant on a basic element, a substance made of atoms with a different number of neutrons than is typical.
Besides the occasional tendency to be radioactive, an isotope tends to behave similarly to the natural element it is a variant on.
Carbon-14, which comprises a trace amount of all carbon on earth, is a radioactive isotope with concentration levels that can be used to determine the precise age of an artifact or fossil.
www.wisegeek.com /what-is-an-isotope.htm   (400 words)

 International Isotope Society / Home
The International Isotope Society is a chartered, international organization independent of special interests groups or companies, makers or users of isotopes (radioactive or stable), etc. It is run entirely by the enthusiastic and unselfish dedicated volunteer work of its members.
The mission and principal aims of the International Isotope Society are to encourage throughout the scientific community the advancement in knowledge of the synthesis, measurement, and applications of isotopes and isotopically labeled compounds through the effective promotion of awareness and actions on key issues by providing a communications network and forum through its membership.
Overall, the International Isotope Society aims to promote the uses of isotopes and isotopically labeled compounds for studies to further improve the quality of life worldwide.
www.intl-isotope-soc.org   (270 words)

  ISOTOPE - Definition
An alternate form of an element that has the usual number of protons but a nonstandard number of neutrons; the fewer or additional neutrons give the isotope a different atomic weight than the regular element and may make the isotope radioactive, but otherwise an isotope has the same chemical action as the regular element.
Because of this, isotopes (such as radioactive carbon) are used as tracers in biological systems or processes.
Radioactive isotopes are commonly used to make DNA probes and metabolic tracers.
www.hyperdictionary.com /dictionary/isotope   (140 words)

  NationMaster - Encyclopedia: Stable isotope   (Site not responding. Last check: )
Isotopes This isotope table shows all of the known isotopes of the chemical elements, arranged with increasing atomic numbers (proton numbers) from left to right and increasing neutron numbers from top to bottom.
Isotopes are forms of an element whose nuclei have the same atomic number–-the number of protons in the nucleus--but different atomic masses because they contain different numbers of neutrons.
In scientific nomenclature, isotopes (nuclides) are specified by the name of the particular element by a hyphen and the number of nucleons (protons and neutrons) in the atomic nucleus (e.g., helium-3, carbon-12, carbon-14, iron-57, uranium-238).
www.nationmaster.com /encyclopedia/stable-isotope   (722 words)

 About Cambridge Isotope Laboratories
Cambridge Isotope Laboratories, Inc. (CIL) is the world's premier producer of stable isotope labeled compounds and the world leader in the field of isotope separations with an annual production capacity of 120 kilograms of Carbon-13 and annual production capacity of 250 kilograms of Oxygen-18.
For more than 20 years, CIL has specialized in the development, production, and marketing of stable (non-radioactive) isotopes and chemical compounds labeled with stable isotopes.
CIL's chemists are experts in their fields, with extensive years of experience exclusively in the synthesis of stable isotope labeled compounds.
www.isotope.com /cil/about/index.cfm   (157 words)

 Isotope Explorer - nuclear data a mouse-click away
Isotope Explorer - nuclear data a mouse-click away
Isotope Explorer is a Windows application to interactively access and display nuclear data and to search for literature references.
Isotope Explorer supports a nuclear chart interface, it can display systematics of nuclear properties by color coding a nuclear chart, and it can perform complex searches and calculations with the built-in script language.
ie.lbl.gov /isoexpl/isoexpl.htm   (98 words)

 Isotope - Faculty of Science - The Open University
ISOTOPE is an ongoing two-year NESTA-funded research project.
The project team are using an action research approach to inform the co-production of an open source web portal of advice and guidance for those interested in participating science outreach and public engagement activities.
The ISOTOPE Project will be complimented by a second project conducted at the Institute of Advanced Studies at the University of Bristol, led by Professor Kathy Sykes.
www.open.ac.uk /science/outreach/outreach-projects/isotope.php   (305 words)

 Schlumberger, Multiple Isotope Tracer Tool
Schlumberger sharpens your evaluation of stimulation stages by discriminating between gamma ray-emitting isotopes with the MTT log.
When your pad fluid is tagged with one isotope, and each proppant stage with others, a single wireline run can log independently the extent of the fracture and the degree of proppant placement.
Isotope identification by the MTT log is virtually immediate.
www.slb.com /content/services/evaluation/other/mtt.asp?seg=www%2Ebakerjardine%2Ecom&printView=true%2C+true%2C+true%2C+true%2C+true%2C+true%2C+true%2C+true%2C+true&   (324 words)

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