isotopic composition

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• isotopic composition — izotopinė sudėtis statusas T sritis fizika atitikmenys: angl. isotopic composition vok. isotope Zusammensetzung, f; Isotopenzusammensetzung, f rus. изотопный состав, m pranc. composition isotopique, f; constitution isotopique, f …   Fizikos terminų žodynas

• Isotopic dilution — is a technique to increase the precision and accuracy of chemical analysis. First, a known amount of an isotope is added to the sample. For example, to determine the amount of lead in a sample, a known amount of Pb 204, one of the isotopes of… …   Wikipedia

• composition isotopique — izotopinė sudėtis statusas T sritis fizika atitikmenys: angl. isotopic composition vok. isotope Zusammensetzung, f; Isotopenzusammensetzung, f rus. изотопный состав, m pranc. composition isotopique, f; constitution isotopique, f …   Fizikos terminų žodynas

• Isotopic labeling — (or isotopic labelling) is a technique for tracking the passage of a sample of substance through a system. The substance is labeled by including unusual isotopes in its chemical composition. If these unusual isotopes are later detected in a… …   Wikipedia

• Isotopic signature — An isotopic signature (also isotopic fingerprint) is a ratio of stable or unstable isotopes of particular elements found in an investigated material. The atomic mass of different isotopes affect their chemical kinetic behavior, leading to natural …   Wikipedia

• Isotopic — Referring to an isotope, a form of a chemical element with the same atomic number as another element but having a different atomic mass. From the Greek iso , equal, the same + topos , place. Isotopes are used in a number of medical tests. * * *… …   Medical dictionary

• Advanced Composition Explorer — Infobox Spacecraft Name = Advanced Composition Explorer (ACE) Caption = An artist s concept of ACE Organization = NASA Major Contractors = Mission Type = Orbiter Satellite Of = Earth Orbital Insertion Date = Launch = August 25 1997 Launch Vehicle …   Wikipedia

• isotope — isotopic /uy seuh top ik/, adj. isotopically, adv. /uy seuh tohp /, n. Chem. any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in… …   Universalium

• geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …   Universalium

• Pleistocene Epoch — Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began с 1.8 million years ago and ended с 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene… …   Universalium

• Isotope-ratio mass spectrometry — Isotope ratio mass spectrometer with gas bench in foreground Acronym IRMS Classification mass spectrometry Other techniques …   Wikipedia