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technetium | A Wisdom Archive on technetium | | technetium A selection of articles related to technetium | |
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technetium
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| ARTICLES RELATED TO technetium | | | |  technetium: Encyclopedia II - Sellafield - History
Sellafield - Windscale.
The Sellafield site is built on land that was formerly part of the Windscale nuclear site, which is named after a nearby village. Windscale was owned by the United Kingdom Atomic Energy Authority, but when part of it was transferred to BNFL, the transferred part was renamed as "Sellafield". The remainder of the site remains in the hands of the UKAEA and is still called Windscale.
Two air-cooled, graphite-moderated Windscale reactors constituted the first British weapons grade plutonium 239 production facility, built for the British nuclear weapon ...
See also:Sellafield, Sellafield - History, Sellafield - Windscale, Sellafield - The Windscale Piles, Sellafield - The B204 reprocessing plant, Sellafield - Calder Hall nuclear power station, Sellafield - The Windscale fire, Sellafield - Windscale Advanced Gas Cooled Reactor WAGR, Sellafield - Magnox reprocessing plant, Sellafield - Thermal Oxide Reprocessing Plant, Sellafield - The Beach Incident, Sellafield - The Vitrification Plant, Sellafield - The Sellafield MOX Plant, Sellafield - 2005 Thorp plant leak, Sellafield - Sellafield and the local community, Sellafield - Sellafield Visitors Centre, Sellafield - Controversy, Sellafield - Leukemia risks, Sellafield - Irish objections, Sellafield - Norwegian objections, Sellafield - Plutonium records discrepency, Sellafield - Sellafield in art Read more here: » Sellafield: Encyclopedia II - Sellafield - History |
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| | | | | technetium: Encyclopedia II - Nuclear reprocessing - Possible methods for future use
Nuclear reprocessing - Aqueous methods.
The PUREX process can be modified to make a UREX (URanium EXtraction) process which could be used to save space inside high level nuclear waste disposal sites, such as Yucca Mountain, by removing the uranium which makes up the vast majority of the mass and volume of used fuel.
The UREX process is a PUREX process which has been modified to prevent the plutonium being extracted. This can be done by adding a plutonium reductant before the fi ...
See also:Nuclear reprocessing, Nuclear reprocessing - History, Nuclear reprocessing - Spent nuclear fuel, Nuclear reprocessing - Old Methods which are no longer used, Nuclear reprocessing - Bismuth phosphate, Nuclear reprocessing - Hexone or Redox, Nuclear reprocessing - Butex ββ'-dibutyoxydiethyl ether, Nuclear reprocessing - Current methods which are in use, Nuclear reprocessing - PUREX, Nuclear reprocessing - Possible methods for future use, Nuclear reprocessing - Aqueous methods, Nuclear reprocessing - Non aqueous methods, Nuclear reprocessing - Economics of reprocessing nuclear fuel, Nuclear reprocessing - list of nuclear reprocessing sites Read more here: » Nuclear reprocessing: Encyclopedia II - Nuclear reprocessing - Possible methods for future use |
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| | | | | technetium: Encyclopedia II - Congenital hypothyroidism - Causes Around the world, the most common cause of congenital hypothyroidism is iodine deficiency, but in most of the developed world and areas of adequate environmental iodine, cases are due to a mixture of known and unknown causes. Most commonly there is a defect of development of the thyroid gland itself, resulting in an absent (athyreosis) or underdeveloped (hypoplastic) gland. A hypoplastic gland may develop higher in the neck or even in the back of the tongue. A gland in the wrong place is referred to as ectopic, and an ectopic gland at ...
See also:Congenital hypothyroidism, Congenital hypothyroidism - Causes, Congenital hypothyroidism - Diagnostic evaluation, Congenital hypothyroidism - Treatment, Congenital hypothyroidism - Symptoms, Congenital hypothyroidism - Prognosis Read more here: » Congenital hypothyroidism: Encyclopedia II - Congenital hypothyroidism - Causes |
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| | | | | technetium: Encyclopedia II - Henry Moseley - Biography Moseley was born in Weymouth, England. In 1906 he entered Trinity College of the University of Oxford, and on graduation from that institution went to Manchester University to work with Ernest Rutherford. For his first year at Manchester, he had a full teaching load, but after a year he was relieved of his teaching duties and began full-time research.
In 1913, by using x-ray spectra obtained by diffraction in crystals, he found a systematic relation between wavelength and atomic number, Moseley's law. Previous to this, atomic numbers ...
See also:Henry Moseley, Henry Moseley - Biography, Henry Moseley - Quotation Read more here: » Henry Moseley: Encyclopedia II - Henry Moseley - Biography |
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| | | | | | | technetium: Encyclopedia II - Fission product - Fission products listed according to atomic number For fission of Uranium-235 the most common radioactive fission products include isotopes of Iodine, Caesium, Strontium, Xenon and Barium. Many of the fission products decay through very shortlived isotopes to form stable isotopes, but also a considerable number of the radioisotopes have half lives longer than a day. Some fission products are useful as beta and gamma sources in medicine and industry, see common beta emitters and commonly used gamma emitting isotopes for more details. Few fission products are alpha particle emitters, but ...
See also:Fission product, Fission product - Physical process of nuclear fission, Fission product - Mass vs. yield curve, Fission product - FPs in power reactors, Fission product - Fission products listed according to atomic number, Fission product - Krypton, Fission product - Strontium, Fission product - Zirconium, Fission product - Molybdenum, Fission product - Technetium, Fission product - Ruthenium, Fission product - Rhodium, Fission product - Palladium, Fission product - Tellurium-132, Fission product - Iodine, Fission product - Xenon, Fission product - Cesium, Fission product - Barium, Fission product - Lanthanides Lanthanum cerium neodymium and samarium, Fission product - Countermeasures against the worst fission products found in accident fallout, Fission product - Iodine, Fission product - Cesium, Fission product - Strontium, Fission product - Fission products within the back end of the nuclear fuel cycle Read more here: » Fission product: Encyclopedia II - Fission product - Fission products listed according to atomic number |
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| | | | | | technetium: Encyclopedia II - Chemical element - Nomenclature The naming of elements precedes the atomic theory of matter, although at the time it was not known which chemicals were elements and which compounds. When it was learned, existing names (e.g., gold, mercury, iron) were kept in most countries, and national differences emerged over the names of elements either for convenience, linguistic niceties, or nationalism. For example, the Germans use "Wasserstoff" for "hydrogen" and "Sauerstoff" for "oxygen," while some romance languages use "natrium" for "sodium" and "kalium" for "potassium," and the French prefer the o ...
See also:Chemical element, Chemical element - Chemistry terminology, Chemical element - Description, Chemical element - Nomenclature, Chemical element - Chemical symbols, Chemical element - Specific chemical elements, Chemical element - General chemical symbols, Chemical element - Nonelement symbols Read more here: » Chemical element: Encyclopedia II - Chemical element - Nomenclature |
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| | | | | technetium: Encyclopedia II - Cholecystitis - Radiology Sonography is a sensitive and specific modality for diagnosis of acute cholecystitis; adjusted sensitivity and specificity for diagnosis of acute cholecystitis are 88% and 80%, respectively. The 2 major diagnostic criteria are cholelithiasis and sonographic Murphy's sign. Minor criteria include gallbladder wall thickening greater than 3mm, pericholecystic fluid, and gallbladder dilatation.
The reported sensitivity and specificity of CT scan findings are in the range of 90-95%. CT is more sensitive than ultrasonography in the depiction ...
See also:Cholecystitis, Cholecystitis - Diagnosis, Cholecystitis - Radiology, Cholecystitis - References, Cholecystitis - Therapy, Cholecystitis - Complications, Cholecystitis - of cholecystitis, Cholecystitis - of cholecystectomy Read more here: » Cholecystitis: Encyclopedia II - Cholecystitis - Radiology |
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| | | | | technetium: Encyclopedia II - Cardiology diagnostic tests and procedures - Medical imaging
Cardiology diagnostic tests and procedures - Coronary catheterization.
Coronary catheterization uses pressure monitoring and blood sampling through a catheter inserted into the heart through blood vessels in the leg to determine the functioning of the heart, and, following injections of radiocontrast dye, uses X-ray fluoroscopy, typically at 30 frame/s, to visualize the position and size of blood of within the heart chambers and arteries. Coronary angiography is used to determine the patency and configuration of the coronary artery lumens.
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See also:Cardiology diagnostic tests and procedures, Cardiology diagnostic tests and procedures - Bedside, Cardiology diagnostic tests and procedures - History, Cardiology diagnostic tests and procedures - Auscultation, Cardiology diagnostic tests and procedures - Laboratory, Cardiology diagnostic tests and procedures - Blood tests, Cardiology diagnostic tests and procedures - Electrophysiology, Cardiology diagnostic tests and procedures - Electrocardiogram, Cardiology diagnostic tests and procedures - Holter monitor, Cardiology diagnostic tests and procedures - Event monitor, Cardiology diagnostic tests and procedures - Cardiac stress testing, Cardiology diagnostic tests and procedures - Medical imaging, Cardiology diagnostic tests and procedures - Coronary catheterization, Cardiology diagnostic tests and procedures - Echocardiogram, Cardiology diagnostic tests and procedures - Intravascular ultrasound, Cardiology diagnostic tests and procedures - Positron emission tomography, Cardiology diagnostic tests and procedures - Computed axial tomography, Cardiology diagnostic tests and procedures - Magnetic resonance imaging, Cardiology diagnostic tests and procedures - Related topics Read more here: » Cardiology diagnostic tests and procedures: Encyclopedia II - Cardiology diagnostic tests and procedures - Medical imaging |
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| | | | | | technetium: Encyclopedia II - Congenital hypothyroidism - Symptoms Infants born with congenital hypothyroidism may show no effects, or may display mild effects that often go unrecognized as a problem: excessive sleeping, reduced interest in nursing, poor muscle tone, low or hoarse cry, infrequent bowel movements, exaggerated jaundice, and low body temperature. If fetal deficiency was severe because of complete absence (athyreosis) of the gland, physical features may include a larger anterior fontanel, persistence of a posterior fontanel, a ...
See also:Congenital hypothyroidism, Congenital hypothyroidism - Causes, Congenital hypothyroidism - Diagnostic evaluation, Congenital hypothyroidism - Treatment, Congenital hypothyroidism - Symptoms, Congenital hypothyroidism - Prognosis Read more here: » Congenital hypothyroidism: Encyclopedia II - Congenital hypothyroidism - Symptoms |
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| | | | | | | technetium: Encyclopedia II - Congenital hypothyroidism - Treatment The goal of newborn screening programs is to detect and start treatment within the first 1-2 weeks of life. Treatment consists of a daily dose of thyroxine, available as a small tablet. The generic name is levothyroxine, and several brands are available. Commonly used brands in North America are Synthroid, Levoxyl, Unithroid, and Levothroid. The tablet is crushed and given to the infant with a small amount of water or milk. The most commonly recommended dose ...
See also:Congenital hypothyroidism, Congenital hypothyroidism - Causes, Congenital hypothyroidism - Diagnostic evaluation, Congenital hypothyroidism - Treatment, Congenital hypothyroidism - Symptoms, Congenital hypothyroidism - Prognosis Read more here: » Congenital hypothyroidism: Encyclopedia II - Congenital hypothyroidism - Treatment |
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| | | | | | technetium: Encyclopedia II - Chemical element - Chemical symbols
Chemical element - Specific chemical elements.
Before chemistry became a science, alchemists had designed arcane symbols for both metals and common compounds. These were however used as abbreviations in diagrams or procedures; there was no concept of one atoms combining to form molecules. With his advances in the atomic theory of matter, John Dalton devised his own simpler symbols, based on circles, which were to be used to depict molecules. These were superceded by the current typographical system in which chemi ...
See also:Chemical element, Chemical element - Chemistry terminology, Chemical element - Description, Chemical element - Nomenclature, Chemical element - Chemical symbols, Chemical element - Specific chemical elements, Chemical element - General chemical symbols, Chemical element - Nonelement symbols Read more here: » Chemical element: Encyclopedia II - Chemical element - Chemical symbols |
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| | | | | technetium: Encyclopedia II - Cholecystitis - Diagnosis The classic patient with acute cholecystitis presents with acute right upper quadrant pain, nausea/vomiting, and fever. On physical examination, he or she has a Murphy's sign, which is a diaphragm spasm (due to the intense pain) when the region of the gall bladder is palpated by the examiner.
Laboratory values may be notable for an elevated alkaline phosphatase, possibly an elevated bilirubin (although this could indicate choledocholithiasis), and possibly an elevation of the white blood cell count. The degree of elevation of these la ...
See also:Cholecystitis, Cholecystitis - Diagnosis, Cholecystitis - Radiology, Cholecystitis - References, Cholecystitis - Therapy, Cholecystitis - Complications, Cholecystitis - of cholecystitis, Cholecystitis - of cholecystectomy Read more here: » Cholecystitis: Encyclopedia II - Cholecystitis - Diagnosis |
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| | | | | | technetium: Encyclopedia II - Nuclear reprocessing - Spent nuclear fuel Spent low enriched uranium fuel contains:
3% of the mass consists of fission products of 235U (also indirect products in the decay chain), nuclear poisons considered radioactive waste or separated further for various industrial and medical uses. The fission products include every element from zinc through to the lanthanides, much of the fission yield is concentrated in two peaks, one in the second transition row (Zr, Mo, Tc, Ru, Rh, Pd) while the other is later in the periodic table (I, Xe, Cs, Ba, La, Ce, Nd). Many o ...
See also:Nuclear reprocessing, Nuclear reprocessing - History, Nuclear reprocessing - Spent nuclear fuel, Nuclear reprocessing - Old Methods which are no longer used, Nuclear reprocessing - Bismuth phosphate, Nuclear reprocessing - Hexone or Redox, Nuclear reprocessing - Butex ββ'-dibutyoxydiethyl ether, Nuclear reprocessing - Current methods which are in use, Nuclear reprocessing - PUREX, Nuclear reprocessing - Possible methods for future use, Nuclear reprocessing - Aqueous methods, Nuclear reprocessing - Non aqueous methods, Nuclear reprocessing - Economics of reprocessing nuclear fuel, Nuclear reprocessing - list of nuclear reprocessing sites Read more here: » Nuclear reprocessing: Encyclopedia II - Nuclear reprocessing - Spent nuclear fuel |
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