half-life in Russian
half-life in Russian
пери́од полураспа́да
(nuclear physics) The time required for half the nuclei in a sample of an isotope to undergo radioactive decay.
[[период|пери́од]] [[полужизнь|полужи́зни]]
(physical chemistry) In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
[[период|пери́од]] [[полувыведение|полувыведе́ния]]
(medicine, pharmacology) The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacological, physiologic, or radiological activity.