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Technetium (43 Tc) is one of the two elements with Z < 83 that have no stable isotopes; the other such element is promethium. [2] It is primarily artificial, with only trace quantities existing in nature produced by spontaneous fission (there are an estimated 2.5 × 10 −13 grams of 99 Tc per gram of pitchblende) [3] or neutron capture by molybdenum.
Technetium (99m Tc) sestamibi ("Cardiolite") is widely used for imaging of the heart. Technetium forms a variety of coordination complexes with organic ligands. Many have been well-investigated because of their relevance to nuclear medicine. [51] Technetium forms a variety of compounds with Tc–C bonds, i.e. organotechnetium complexes.
TC 4: Rolling bearings: TC 5: Ferrous metal pipes and metallic fittings: TC 6: Paper, board and pulps: TC 7: Rivets: Disbanded TC 8: Ships and marine technology: TC 9: Shipbuilding details for sea navigation: Disbanded TC 10: Technical product documentation: TC 11: Boilers and pressure vessels: STANDBY TC 12: Quantities and units: TC 13: Shaft ...
A chart or table of nuclides maps the nuclear, or radioactive, behavior of nuclides, as it distinguishes the isotopes of an element.It contrasts with a periodic table, which only maps their chemical behavior, since isotopes (nuclides that are variants of the same element) do not differ chemically to any significant degree, with the exception of hydrogen.
Technetium-99 (99 Tc) is an isotope of technetium that decays with a half-life of 211,000 years to stable ruthenium-99, emitting beta particles, but no gamma rays. It is the most significant long-lived fission product of uranium fission, producing the largest fraction of the total long-lived radiation emissions of nuclear waste .
Any TC can form one or more SCs depending on the extent of its work programme. SCs define their scope under the parent TC to which they report directly. TC membership is composed of the IEC NCs (National Committees), all of which are free to take part in the work of any given TC.
This is a list of CEN Technical Committees.. The European Committee for Standardization (CEN) is one of three European standardisation organisations in the European Union, listed in ANNEX I of the Regulation (EU) No 1025/2012. [1]
A remote subscriber loop carrier cabinet. A subscriber loop carrier or subscriber line carrier (SLC) provides telephone exchange-like telephone interface functionality. SLC remote terminals are typically located in areas with a high density of telephone subscribers, such as a residential neighborhood, or very rural areas with widely dispersed customers, that are remote from the telephone ...