(n.) An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is used as a pigment in porcelain painting. Symbol U. Atomic weight 239.
Example Sentences:
(1) These steps signify a willingness for engagement not seen before, but they have been overshadowed by the "nuclear crisis" triggered in October 2002 when Pyongyang admitted to having the "know-how", but not the technology, for a highly enriched uranium route to nuclear weapons.
(2) It paves the way for Iran to get nuclear weapons.” Under the deal, Iran committed to reducing the number of its centrifuges by two-thirds, capping its level of uranium enrichment well below the level needed for bomb-grade material, reducing its enriched uranium stockpile from around 10,000kg to 300kg for 15 years, and submitting to international inspections to verify its compliance.
(3) A simple method for distinction between RNA- and DNA-containing structures in aldehyde- and osmiumtextroxide-fixed electron microscopic autoradiographs (or ordinary thin sections) is described: the developer and the acetic acid used for processing autoradiographs extract selectively uranium acetate from DNA containing-structures which, after staining with lead citrate, leads to a characteristically 'bleached' appearance of the DNA.
(4) When the reactor is running, high-speed particles called neutrons strike the uranium atoms and cause them to split in a process known as nuclear fission.
(5) Lung dissolution of industrial uranium tetrafluoride (UF4) was tested in rats and baboons by intratracheal instillation and inhalation, to check the W classification given to UF4 by the International Commission on Radiological Protection.
(6) We aggressively push new uranium deals to countries like India , whose nuclear industry has been called unsafe by its own auditor general , and which point blank refuses to sign the global nuclear non-proliferation treaty .
(7) A chemist working at Iran's main uranium enrichment plant was killed on Wednesday when attackers on a motorbike stuck a magnetic bomb to his car.
(8) The 20%-enriched uranium stockpile would be at the heart of the new diplomatic effort.
(9) The aim of the present study was to determine whether the nephrotoxicity of the uranium-containing compound uranyl fluoride (UO2F2) is enhanced after unilateral nephrectomy.
(10) After fixing, some specimens were embedded in resin and prepared in ultra thin sections before being triple stained with tannic acid-ethanol uranium-lead.
(11) Among the ideas on the table were cutting Iran’s uranium stockpile, slowing the speed of the centrifuges or reconfiguring them.
(12) He was responsible for securing vital uranium-enrichment technology, photographing centrifuge blueprints that a German executive had been bribed into temporarily "mislaying" in his kitchen.
(13) Obama described the site, apparently a second Iranian facility for enriching uranium, as a "disturbing revelation".
(14) In kidney and bone, only administration of Tiron at 0, 0.25, or 1 hr after uranium injection, or gallic acid at 1 hr after uranium exposure significantly reduced tissue uranium concentrations.
(15) The following correction was printed in the Guardian's Corrections and clarifications column, Saturday November 17 2007 The obituary below said that some of the uranium used in the Little Boy atom bomb was snatched from Soviet-occupied Germany in 1945 by an Anglo-American special unit.
(16) The six powers (US, UK, France, Russia, China and Germany) will make it clearer to Iran that relief from the current severe sanctions regime will be available if Iran stops producing 20%-enriched uranium – a particular proliferation concern as it could easily turned into weapons-grade uranium should Iran take the decision to make a bomb.
(17) Using the Kaplan-Meier method, actuarial survival data were estimated in cancer patients registered in the Cancer Registry of Health Institute of Uranium Industry during 1976-1983, and in those followed up for 3 years and longer after the initiation of their treatment.
(18) Seventy-three rats were exposed to an aerosol of enriched uranium dioxide (UO2), giving initial lung burdens of 26 to 447 micrograms at 6 days post-inhalation (PI).
(19) Does Obama include the right to enrich uranium, which Iran is entitled to do as a signatory of the nuclear non-proliferation treaty?
(20) A future in which Iran doesn’t have a single centrifuge for enriching uranium?
Uranyl
Definition:
(n.) The radical UO2, conveniently regarded as a residue of many uranium compounds.
Example Sentences:
(1) Chemical binding studies showed that the teichoic acid was the major uranyl binding component in isolated walls, from which it might be inferred that teichoic acid was located in the densely staining regions.
(2) Several attempts to use a complementary oligodeoxynucleotide to direct a uranyl "warhead" against an oligodeoxynucleotide target were unsuccessful.
(3) Sixteen chelating agents were examined to determine their relative efficacy as antidotes in acute uranyl acetate intoxication in mice after subcutaneous administration.
(4) When negatively stained with uranyl acetate, LPSI was ribbon-like but LPSII exhibited hexagonal lattice structures.
(5) The aim of the present study was to determine whether the nephrotoxicity of the uranium-containing compound uranyl fluoride (UO2F2) is enhanced after unilateral nephrectomy.
(6) It uses carbohydrazide as an osmium bridging agent and both osmium tetroxide and uranyl acetate as electron staining agents.
(7) Polymerization of azole-activated nucleotides was conducted in an aqueous medium with uranyl ion as a catalyst.
(8) A combination of 2% osmium tetroxide-2% uranyl acetate or 2% gallic acid alone resulted in optimum fixation as ascertained by least extraction of radiolabels.
(9) DNA breakage in spermiogenic stages of mice treated with enriched uranyl fluoride (UO2F2) was studied using an alkaline elution technique.
(10) Prefixed virus was round with peak diameters of 141 and 130 nm, respectively, in phosphotungstate, and 148 and 117 nm, respectively, in uranyl acetate.
(11) Electron microscopic examination of embryos stained en bloc with uranyl acetate, and the study of junction permeability using horseradish peroxidase and lanthanum nitrate provided information on structure, intermembrane spacing and permeability of the junctional complexes.
(12) The absorption of U within the male Wistar rat was determined following oral gavage with uranyl nitrate solutions at seven different dosages.
(13) This capsule stained with lead citrate and uranyl acetate, but not with ruthenium red.
(14) Uranyl formate-contrasted specimens displayed an elongated hexagonal nucleocapsid with a neck region; the cross-striated tail possessed a starlike base plate.
(15) Finally, uranyl photocleavage of the internal control region (ICR) of the 5S-RNA gene yields a cleavage modulation pattern fully compatible with that obtained by DNase I which also--in a more complex way--senses DNA minor groove width.
(16) Dense laminae were revealed in sections of osmium-fixed walls stained with ruthenium red which corresponded to similar regions stained by uranyl and lead.
(17) At 3 h total cortical RBF decreased to 35% of control values and the ration of blood flow in outer to inner cortical zones also decreased, reflecting outer cortical ischaemia, PRA increased in the first hour after uranyl nitrate and slowly declined therafter, though not to control values.
(18) To investigate a capsular swelling reaction of the strain K-9 of Klebsiella pneumoniae, possessor of large capsule, ultra-thin sections of the organisms were stained with uranyl acetate and lead citrate and were treated with rabbit antiserum.
(19) Results confirm the recommendations of ICRP that uranyl nitrate and bicarbonate should be treated as class D compounds; but imply that some of the parameters used in the ICRP lung model are not applicable to soluble uranium compounds.
(20) Cd2+ increased both amplitude and duration of the contractile response to direct stimulation in either 0.25 mM Ca2+ Krebs or 2.5 mM Ca2+ Krebs containing the K+-channel blockers, 4-aminopyridine, uranyl nitrate or tetraethylammonium ion.