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isotopic method

См. также в других словарях:

  • 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 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

  • Коптюг — Коптюг, Валентин Афанасьевич Валентин Афанасьевич Коптюг Дата рождения: 9 июня 1931(1931 06 09) Место рождения: Юхнов, Западная область, СССР Дата смерти: 10 января 1997 …   Википедия

  • glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… …   Universalium

  • High-fructose corn syrup — (HFCS) is any of a group of corn syrups that has undergone enzymatic processing to increase its fructose content, and is then mixed with pure corn syrup (100% glucose), becoming a high fructose corn syrup; the types are: HFCS 90 (mostly for… …   Wikipedia

  • Isoglucose — Sirop de maïs à haute teneur en fructose Le sirop de maïs à haute teneur en fructose (HFCS selon le signe anglais de High fructose corn syrup) désigne une série de sirops de maïs qui ont été soumis à des processus enzymatiques en vue d augmenter… …   Wikipédia en Français

  • Sirop de mais a haute teneur en fructose — Sirop de maïs à haute teneur en fructose Le sirop de maïs à haute teneur en fructose (HFCS selon le signe anglais de High fructose corn syrup) désigne une série de sirops de maïs qui ont été soumis à des processus enzymatiques en vue d augmenter… …   Wikipédia en Français

  • Sirop de maïs à haute teneur en fructose — Mieux connu sous le nom générique de le sirop de glucose fructose (ou tout simplement la glucose fructose[1]), le sirop de maïs à haute teneur en fructose (SGHF, ou HFCS selon le signe anglais de high fructose corn syrup) désigne une série de… …   Wikipédia en Français

  • 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

  • helium dating — Method of dating that depends on the production of helium during the decay of radioactive isotopes of uranium and thorium. Because of this decay, the helium content of any mineral or rock capable of retaining helium will increase during the… …   Universalium

  • dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …   Universalium

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