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Chromium-51 is a synthetic radioactive isotope of chromium having a half-life of 27.7 days and decaying by electron capture with emission of gamma rays (0.32 MeV); it is used to label red blood cells for measurement of mass or volume, survival time, and sequestration studies, for the diagnosis of gastrointestinal bleeding, and to label platelets to study their survival.
The classical method of detecting this is the chromium-51 [51 Cr] release assay; the sulfur-35 [35 S] release assay is a little used radioisotope-based alternative. Target cell lysis is determined by measuring the amount of radiolabel released into the cell culture medium by means of a gamma counter or scintillation counter.
The World Health Organization recommends a maximum allowable concentration of 0.05 milligrams per litre of chromium(VI) in drinking water. [7] In Europe, the use of hexavalent chromium is regulated by the Restriction of Hazardous Substances Directive. Hexavalent chromium can be found in some dyes and paints, as well as in some leather tanning ...
most commonly used medical radioisotope, used as a radioactive tracer Iodine-129: 53: 76: 15,700,000 y: β −: 194 Cosmogenic: longest lived fission product; groundwater tracer Iodine-131: 53: 78: 8 d: β −: 971 Fission product: most significant short-term health hazard from nuclear fission, used in nuclear medicine, industrial tracer Xenon ...
Radioactive isotopes are used in medicine for both treatment and diagnostic scans. The most common isotope used in diagnostic scans is Technetium-99m, used in approximately 85% of all nuclear medicine diagnostic scans worldwide. It is used for diagnoses involving a large range of body parts and diseases such as cancers and neurological problems ...
Note that medical isotopes may be not radioactive, for example deuterium (2 H) in deuterated drug. Pages in category "Medical isotopes" The following 34 pages are in this category, out of 34 total.
Radiopharmaceuticals are used in the field of nuclear medicine as radioactive tracers in medical imaging and in therapy for many diseases (for example, brachytherapy). Many radiopharmaceuticals use technetium-99m (Tc-99m) which has many useful properties as a gamma-emitting tracer nuclide .
Because of environmental and health regulations on chromates, alternative coating methods are under development. [77] Chromic acid anodizing (or Type I anodizing) of aluminium is another electrochemical process that does not lead to the deposition of chromium, but uses chromic acid as an electrolyte in the solution. During anodization, an oxide ...