Download or read book Boron Isotope Enrichment written by Kenneth O. Hambrock and published by . This book was released on 1957 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method of Separating Boron Isotopes written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of boron isotope enrichment involving the isotope preferential photolysis of (2-chloroethenyl)dichloroborane as the feed material. The photolysis can readily be achieved with CO.sub. 2 laser radiation and using fluences significantly below those required to dissociate BCl.sub. 3.
Download or read book Boron Isotopes written by Horst Marschall and published by Springer. This book was released on 2017-11-16 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume on boron isotope geochemistry offers review chapters summarizing the cosmochemistry, high-temperature and low-temperature geochemistry, and marine chemistry of boron. It also covers theoretical aspects of B isotope fractionation, experiments and atomic modeling, as well as all aspects of boron isotope analyses in geologic materials using the full range of solutions and in-situ methods. The book provides guidance for researchers on the analytical and theoretical aspects, as well as introducing the various scientific applications and research fields in which boron isotopes currently play a major role. The last compendium to summarize the geochemistry of boron and address its isotope geochemistry was published over 20 years ago (Grew &Anovitz, 1996, MSA Review, Vol.33), and there have since been significant advances in analytical techniques, applications and scientific insights into the isotope geochemistry of boron. This volume in the “Advances in Isotope Geochemistry” series provides a valuable source for students and professionals alike, both as an introduction to a new field and as a reference in ongoing research. Chapters 5 and 8 of this book are available open access under a CC BY 4.0 license at link.springer.com
Download or read book Separation of the Boron Isotopes written by George Moseley Murphy and published by . This book was released on 1957 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Separation of the Boron Isotopes written by George Moseley Murphy and published by . This book was released on 1952 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The alpha N Cross Section of Boron written by Raymond L. Walker and published by . This book was released on 1949 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ENGINEERING SCALE STUDIES OF BORON ISOTOPE SEPARATION written by and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemical Separation of Boron Isotopes written by A. A. Palko and published by . This book was released on 1978 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Note on the Feasibility of the Boron Fluoride Monohydrate Process of Boron Isotope Separation written by Slobodan V. Ribnikar and published by . This book was released on 1959 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isotopes for Medicine and the Life Sciences written by Institute of Medicine and published by National Academies Press. This book was released on 1995-01-27 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radioactive isotopes and enriched stable isotopes are used widely in medicine, agriculture, industry, and science, where their application allows us to perform many tasks more accurately, more simply, less expensively, and more quickly than would otherwise be possible. Indeed, in many casesâ€"for example, biological tracersâ€"there is no alternative. In a stellar example of "technology transfer" that began before the term was popular, the Department of Energy (DOE) and its predecessors has supported the development and application of isotopes and their transfer to the private sector. The DOE is now at an important crossroads: Isotope production has suffered as support for DOE's laboratories has declined. In response to a DOE request, this book is an intensive examination of isotope production and availability, including the education and training of those who will be needed to sustain the flow of radioactive and stable materials from their sources to the laboratories and medical care facilities in which they are used. Chapters include an examination of enriched stable isotopes; reactor and accelerator-produced radionuclides; partnerships among industries, national laboratories, and universities; and national isotope policy.
Download or read book Laser Isotope Separation in Atomic Vapor written by Petr Artemovich Bokhan and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading Russian scientists, including Nobel laureate, A.M. Prokhorov (1916-2002), this first book on this important technology allows an understanding of the physics of atomic vapor laser isotope separation and new photochemical methods of laser isotope separation. One entire chapter is devoted to chemical reactions of atoms in excited states, while further chapters deal with the separation of isotopes by one photon isotope-selective and coherent isotope-selective two photon excitation of atoms. A final chapter looks at the prospects for the industrial production of isotope products by laser isotope separation. The whole is rounded off by six appendices.
Download or read book Isotopic Analysis of Enriched Boron by Chemical Ionization Mass Spectroscopy written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A rapid and accurate CI-MS method has been developed for the isotopic analysis of enriched boron. This method involves the formation of volatile methyl borate from boric acid with direct introduction of the methyl borate into the source of a quadrupole mass spectrometer. Data acquisition and storage is computer-controlled. A subsequent BASIC computer program reads the data from the disc file, computes the average 11B/1°B ratio for up to 250 separate spectra per analysis and calculates the weight percent boron-10 from the corrected 11B/1°B ratio using a calibration factor based on a National Bureau of Standards boric acid standard. The relative standard deviation for the analysis of replicate samples of enriched boron with a boron-10 content in the 90 to 95% range does not exceed 0.005%. Analytical results on NBS certified enriched boron agreed to within 0.06% absolute.
Download or read book Boron Proxies in Paleoceanography and Paleoclimatology written by Bärbel Hönisch and published by John Wiley & Sons. This book was released on 2019-05-13 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic carbon dioxide emissions do not only warm our planet but also acidify our oceans. It is currently unclear to which degree Earth’s climate and marine life will be impacted by these changes but information from Earth history, particularly the geochemical signals of past environmental changes stored in the fossil remains of marine organisms, can help us predict possible future changes. This book aims to be a primer for scientists who seek to apply boron proxies in marine carbonates to estimate past seawater carbonate chemistry and atmospheric pCO2. Boron proxies (δ11B and B/Ca) were introduced nearly three decades ago, with subsequent strides being made in understanding their mechanistic functioning. This text reviews current knowledge about the aqueous systematics, the inorganic and biological controls on boron isotope fractionation and incorporation into marine carbonates, as well as the analytical techniques for measurement of boron proxies. Laboratory and field calibrations of the boron proxies are summarized, and similarities between modern calibrations are explored to suggest estimates for proxy sensitivities in marine calcifiers that are now extinct. Example applications illustrate the potential for reconstructing paleo-atmospheric pCO2 from boron isotopes. Also explored are the sensitivity of paleo-ocean acidity and pCO2 reconstructions to boron isotope proxy systematics that are currently less well understood, including the elemental and boron isotopic composition of seawater through time, seawater alkalinity, temperature and salinity, and their collective impact on the uncertainty of paleo-reconstructions. The B/Ca proxy is based on the same mechanistic principles as the boron isotope proxy, but empirical calibrations suggest seawater pH is not the only controlling factor. B/Ca therefore has the potential to provide a second carbonate parameter that could be paired with δ11B to fully constrain the ocean carbonate system, but the associated uncertainties are large. This text reviews and examines what is currently known about the B/Ca proxy systematics. As more scientists embark on characterizing past ocean acidity and atmospheric pCO2, Boron in Paleoceanography and Paleoclimatology provides a resource to introduce geoscientists to the opportunities and complications of boron proxies, including potential avenues to further refine them.
Download or read book Separation Factors for Boron Isotope Exchange written by S. V. Ribnikar and published by . This book was released on 1959 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method for Separating Boron Isotopes written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of separating boron isotopes .sup. 10 B and .sup. 11 B by laser-induced selective excitation and photodissociation of BCl.sub. 3 molecules containing a particular boron isotope. The photodissociation products react with an appropriate chemical scavenger and the reaction products may readily be separated from undissociated BCl.sub. 3, thus effecting the desired separation of the boron isotopes.
Download or read book Boron written by Lawrence M. Anovitz and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 33 of Reviews in Mineralogy reviews the Mineralogy, Petrology, and Geochemistry of Boron. Contents: Mineralogy, Petrology and Geochemistry of Boron: An Introduction The Crystal Chemistry of Boron Experimental Studies on Borosilicates and Selected Borates Thermochemistry of Borosilicate Melts and Glasses - from Pyrex to Pegmatites Thermodynamics of Boron Minerals: Summary of Structural, Volumetric and Thermochemical Data Continental Borate Deposits of Cenozoic Age Boron in Granitic Rocks and Their Contact Aureoles Experimental Studies of Boron in Granitic Melts Borosilicates (Exclusive of Tourmaline) and Boron in Rock-forming Minerals in Metamorphic Environments Metamorphic Tourmaline and Its Petrologic Applications Tourmaline Associations with Hydrothermal Ore Deposits Geochemistry of Boron and Its Implications for Crustal and Mantle Processes Boron Isotope Geochemistry: An Overview Similarities and Contrasts in Lunar and Terrestrial Boron Geochemistry Electron Probe Microanalysis of Geologic Materials for Boron Analyses of Geological Materials for Boron by Secondary Ion Mass Spectrometry Nuclear Methods for Analysis of Boron in Minerals Parallel Electron Energy-loss Spectroscopy of Boron in Minerals Instrumental Techniques for Boron Isotope Analysis
Download or read book Plasma Torch Production of Elemental Boron written by Union Carbide Corporation. Nuclear Division and published by . This book was released on 1964 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
