• Isotope analysis is the identification of isotopic signature, abundance of certain stable isotopes of chemical elements within organic and inorganic compounds. (wikipedia.org)
  • Germanium-74 oxide isotopic material is available with various enrichment levels. (americanelements.com)
  • From milligram-quantity atomic clock crystals, to hundreds of grams for laser production, to hundreds of kilograms for nuclear reactor water chemistry additives, ISOFLEX meets demanding isotopic purity and enrichment requirements. (isoflex.com)
  • Prior to shipment, all isotopes are analyzed and certified as to isotopic enrichment level and purity. (isoflex.com)
  • Quoted isotopic enrichments are guaranteed within 0.5%, unless otherwise noted. (isoflex.com)
  • Inter-comparison of stable iron, copper and zinc isotopic compositions in six reference materials of biological origin. (vliz.be)
  • To produce WGU, uranium needs to be enriched (e.g., with centrifuges) to more than 90 percent of its fissile isotope U-235. (belfercenter.org)
  • Natural uranium has only 0.7 percent of the isotope U-235, and the effort required to enrich it to one SQ of WGU is about 5,000 Separative Work Units (SWUs). (belfercenter.org)
  • Yet even if UF6 stocks are reduced from their current 7.5-8 tons to 500 kg, a breakout time of between seven and eight months would still be possible given the program's enrichment capabilities with natural uranium feed. (belfercenter.org)
  • New brochure focusing on the uranium enrichment consortium Urenco. (laka.org)
  • In its elementary state uranium is only weakly radioactive due to its unstable isotopes, which vary naturally. (euradcom.org)
  • Yellowcake is only mildly reactive and must go through the enrichment process before uranium is usable in a commercial way. (euradcom.org)
  • The gas can then be enriched to make it concentrated in uranium isotope 235, the isotope most needed for nuclear power. (euradcom.org)
  • To do this, the centrifuge process is used, separating the uranium 235 from waste uranium by repeatedly diffusing the gas through a silver-zinc membrane in thousands of fast-spinning vertical tubes. (euradcom.org)
  • These are all considerations based on current power reactors, but moving to fourth-generation fast neutron reactors will change the outlook dramatically, and means that not only used fuel from today's reactors but also the large stockpiles of depleted uranium (from enrichment plants, about 1.2 million tonnes end 2018) become a fuel source. (world-nuclear.org)
  • All uranium isotopes present in natural uranium are radioactive and fissionable, and 235 U is fissile (will support a neutronmediated chain (PDF) Uranium ores: A review ResearchGate,97· The primary uranium ore mineral is uraninite (UO 2) (previously known as pitchblende). (streekfondswaterland.nl)
  • The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). (wikimili.com)
  • Uranium-235 is the only naturally occurring fissile isotope , which makes it widely used in nuclear power plants and nuclear weapons . (wikimili.com)
  • However, because of the extreme scarcity of concentrations of uranium-235 in naturally occurring uranium (which is, overwhelmingly, mostly uranium-238), uranium needs to undergo enrichment so that enough uranium-235 is present. (wikimili.com)
  • Another fissile isotope, uranium-233 , can be produced from natural thorium and is studied for future industrial use in nuclear technology. (wikimili.com)
  • Uranium is weakly radioactive because all its isotopes are unstable (with half-lives of the six naturally known isotopes, uranium-233 to uranium-238, varying between 69 years and 4.5 billion years). (ipfs.io)
  • Uranium-235 has the distinction of being the only naturally occurring fissile isotope . (ipfs.io)
  • Prices are quoted upon request and will depend upon the particular isotope, enrichment level, purity level, form and quantity. (isoflex.com)
  • Stable isotope ratios are measured using mass spectrometry, which separates the different isotopes of an element on the basis of their mass-to-charge ratio. (wikipedia.org)
  • Carbon isotope ratios can also be used to distinguish between marine, freshwater, and terrestrial food sources. (wikipedia.org)
  • Carbon isotope ratios can be measured in bone collagen or bone mineral (hydroxylapatite), and each of these fractions of bone can be analysed to shed light on different components of diet. (wikipedia.org)
  • While traditional stable isotope analyses of tooth enamel (e.g., carbon and oxygen) and trace element ratios (e.g. (blueskytccaalibaba.com)
  • Cadmium and zinc isotope compositions indicate metal sources and retention mechanisms in different soil particle size fractions. (bvsalud.org)
  • Here, two soils were separated into four particle size fractions, namely fine sand , silt, fine silt, and colloidal particles and used to determine cadmium (Cd) and zinc (Zn) concentrations and isotope compositions. (bvsalud.org)
  • Nitrogen isotopes can be used to infer soil conditions, with enriched δ15N used to infer the addition of manure. (wikipedia.org)
  • In this study, we show that the nitrogen isotope composition of organic matter preserved in mammalian tooth enamel (δ 15 N enamel ) records diet and trophic position. (blueskytccaalibaba.com)
  • In contrast, the nitrogen (N) isotope ratio of organic material (expressed as δ 15 N vs. AIR in ‰, where δ 15 N = [( 15 N/ 14 N sample / 15 N/ 14 N reference ) − 1] × 1000) derived from bulk tissues or specific compounds (e.g., amino acids) is a widely used proxy for the dietary and trophic behavior of animals in terrestrial and marine food webs. (blueskytccaalibaba.com)
  • Despite the potential of nitrogen isotopes for trophic reconstruction, their application in the paleontological record has been limited due to the poor preservation of N-containing organic matter. (blueskytccaalibaba.com)
  • Germanium-74 Oxide Isotope is one of over 200 stable isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications. (americanelements.com)
  • Do you need germanium isotopes for neutrino detectors, silicon isotopes for high-energy accelerator research, or zinc isotopes for metabolic studies? (isoflex.com)
  • Takano and co-workers (2017, see reference below) have developed a new method to determine nickel (Ni), copper (Cu) and zinc (Zn) isotopes in seawater. (geotraces.org)
  • of somewhat related interest: As well, in conjunction with bacteria, geological processes helped detoxify the earth of dangerous levels of metal: The Concentration of Metals for Humanity's Benefit: Excerpt: They demonstrated that hydrothermal fluid flow could enrich the concentration of metals like zinc, lead, and copper by at least a factor of a thousand. (uncommondescent.com)
  • Therefore, initial magma enrichment in copper and sulphur, although adding to the metallogenic potential, is not necessary to form a giant deposit. (nature.com)
  • ISOFLEX offers the largest available assortment of difficult-to-find, limited-use isotopes. (isoflex.com)
  • Examining the 12C/13C isotope ratio, it is possible to determine whether animals and humans ate predominantly C3 or C4 plants. (wikipedia.org)
  • Lemaitre and her colleagues realized the simultaneous analysis of the dissolved nickel isotopes and concentrations in the North Atlantic. (geotraces.org)
  • In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction . (wikimili.com)
  • Pure 68Zn and 67Zn are important stable nuclides in the medical industry as these isotopes are used for production of gallium-based radiopharmaceuticals used in positron emission tomography (PET) and single-photon emission computerised tomography (SPECT) scans. (sun.ac.za)
  • Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei. (isotope.one)
  • The biological role and underlying mechanism of action of zinc-finger protein 326 (ZNF326) in malignant tumors, including breast cancer, are still not clear. (cancerindex.org)
  • The light chain is a zinc-metalloprotease which is responsible for the cleavage of three SNARE complex proteins including SNAP-25 (Synaptosome-associated protein of 25 kDa), synaptobrevin-2 (also termed VAMP-2) and syntaxin. (cdc.gov)
  • ENGLISH ABSTRACT: The vast zinc (Zn) reserves in South Africa are currently being underutilized, as the Zn ore refinement and isotope enrichment occurs abroad. (sun.ac.za)
  • A complication is that enrichment also occurs as a result of environmental factors, such as wetland denitrification, salinity, aridity, microbes, and clearance. (wikipedia.org)
  • Particularly in the Bronze Age Mediterranean, lead isotope analysis has been a useful tool for determining the sources of metals and an important indicator of trade patterns. (wikipedia.org)
  • Some metals, such as lithium or zinc, which are usually rare in the environment, can be considerably enriched because of our massive use of high-tech objects, which are little recycled. (anr.fr)
  • Horner and co-authors assess whether nine bioactive trace metals and their isotopes can be used as paleo-productivity proxies. (geotraces.org)
  • This study aimed to investigate, model and optimize resonant ionization spectroscopy (RIS) schemes for the Zn isotopes 68Zn and 67Zn that are suitable for laser-based enrichment of these isotopes from natural Zn. (sun.ac.za)
  • This system was used to investigate a resonance ionization scheme that has potential for laser-based enrichment of Zn isotopes from a natural Zn sample. (sun.ac.za)
  • Isotope analysis has widespread applicability in the natural sciences. (wikipedia.org)
  • The δ 15 N enamel of modern African mammals shows a 3.7‰ increase between herbivores and carnivores as expected from trophic enrichment, and there is a strong positive correlation between δ 15 N enamel and δ 15 N bone-collagen values from the same individuals. (blueskytccaalibaba.com)
  • Interpretation of lead isotope data is, however, often contentious and faces numerous instrumental and methodological challenges. (wikipedia.org)
  • SCOR sponsored WG 131 on The Legacy of in situ Iron Enrichment: Data Compilation and Modeling , which compiled data from the 10 large-scale iron fertilization experiments that had been conducted to that point (see article ). (scor-int.org)
  • Thus, the price quoted for 100 mg of 64 ZnO would apply to 100 mg of Zinc-64 metal , not 100 mg of 64 ZnO compound . (isoflex.com)
  • Carbon isotopes are analysed in archaeology to determine the source of carbon at the base of the foodchain. (wikipedia.org)
  • Other ancient mats have been studied, but Westall says evidence that they photosynthesized has been indirect - either being assumed from their carbon-isotope composition, which Westall argues can also come from non-photosynthetic microbes, or by looking closely at the mat's structure and seeing microbe-like structures. (uncommondescent.com)
  • The term stable isotope has a meaning similar to stable nuclide, but is preferably used when speaking of nuclides of a specific element. (isotope.one)
  • The limiting factor to the isotope selectivity of the RIS experiment was the bandwidth of the dye laser used for the first excitation step. (sun.ac.za)
  • Isotope analysis has been particularly useful in archaeology as a means of characterization. (wikipedia.org)
  • It is also important for the researcher to know the variations of isotopes within individuals, between individuals, and over time. (wikipedia.org)
  • Compound weight is calculated using standard stoichiometry methods, without correction for enrichment. (isoflex.com)