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  • 1
    Monograph available for loan
    Monograph available for loan
    Washington, D.C. : Mineralogical Society of America
    Associated volumes
    Call number: 11/M 99.0611
    In: Reviews in mineralogy
    Description / Table of Contents: This volume was written in preparation for a short course by the same title, sponsored by the Mineralogical Society of America, October 22 and 23, 1999 in Golden, Colorado, prior to MSA's joint annual meeting with the Geological Society of America. Research emphasis in traditional mineralogy has often focused on detailed studies of a few hundred common rock-forming minerals. However, scanning the contents of a current issue of American Mineralogist or Canadian Mineralogist, or the titles of recent Reviews in Mineralogy volumes reveals that the emphasis of mineralogical research has undergone considerable change recently. Less-common, low-temperature minerals are receiving ever increasing attention, often owing to their importance to the environment. A tremendous challenge lies ahead for mineralogists and geochemists: the occurrences, structures, stabilities, and paragenesis of perhaps a thousand low-temperature minerals require detailed study if geoscientists are to be properly equipped to tackle environmental problems today and in the future. In many low-temperature environments mineral assemblages are extremely complex, with more than 10 species common in many em-size samples. This Reviews in Mineralogy volume provides detailed reviews of various aspects of the mineralogy and geochemistry of uranium; hopefully the reader will benefit from this presentation, and perhaps more importantly, the reader may develop a sense of the tremendous amount of work that remains to be done, not only concerning uranium in natural systems, but for low-temperature mineralogy and geochemistry in general. The low crustal abundance of uranium belies its mineralogical and geochemical significance: more than five percent of minerals known today contain uranium as an essential constituent. Uranium is a geochemical and geochronological indicator, and the U-Pb decay series has long been one of the most important systems for dating rocks and minerals. Uranium is an important energy source, and the uranium nuclear fuel cycle has generated a great deal of interest in uranium mineralogy and geochemistry since the first controlled nuclear fission reaction nearly sixty years ago. Current interest in uranium mineralogy and geochemistry stems in large part from the utilization of uranium as a natural resource. Environmental issues such as coping with uranium mine and mill tailings and other uranium-contaminated sites, as well as permanent disposal of highly radioactive uranium-based nuclear fuels in deep geologic repositories, have all refocused attention on uranium. More than twenty years have passed since the 1978 Mineralogical Association of Canada's Short Course on Uranium Deposits. A realignment of research focus has clearly occurred since then, from exploration and exploitation to environmental remediation and geological "forecasting" of potential future impacts of decisions made today. The past decades have produced numerous remarkable advances in our understanding of uranium mineralogy and geochemistry, as well as technological and theoretical advances in analytical techniques which have revolutionized research of trace-elements, including uranium. It was these advances that provided us the impetus to develop this volume. We have attempted to produce a volume that incorporates most important aspects of uranium in natural systems, while providing some insight into important applications of uranium mineralogy and geochemistry to environmental problems. The result is a blend of perspectives and themes: historical (Chapter 1), crystal structures (Chapter 2), systematic mineralogy and paragenesis (Chapters 3 and 7), the genesis of uranium ore deposits (Chapters 4 and 6), the geochemical behavior of uranium and other actinides in natural fluids (Chapter 5), environmental aspects of uranium such as microbial effects, groundwater contamination and disposal of nuclear waste (Chapters 8, 9 and 10), and various analytical techniques applied to uranium-bearing phases (Chapters 11-14).
    Type of Medium: Monograph available for loan
    Pages: 679 S.
    ISBN: 0-939950-50-2 , 978-0-939950-50-8
    ISSN: 1529-6466
    Series Statement: Reviews in mineralogy 38
    Classification:
    Mineralogy
    Language: English
    Note: Chapter 1. Radioactivity and the 20th Century by Rodney C. Ewing, p. 1 - 22 Chapter 2. The Crystal Chemistry of Uranium by Peter C. Burns, p. 23 - 90 Chapter 3. Systematics and Paragenesis of Uranium Minerals by Robert Finch and Takaski Murakami, p. 91 - 180 Chapter 4. Stable Isotope Geochemistry of Uranium Deposits by Mostafa Fayek and T. Kurtis Kyser, p. 181 - 220 Chapter 5. Environmental Aqueous Geochemistry of Actinides by William M. Murphy and Everett. L. Shock, p. 221 - 254 Chapter 6. Uranium Ore Deposits: Products of the Radioactive Earth by Jane Plant, Peter R. Simpson, Barry Smith, and Brian F. Windley, p. 255 - 320 Chapter 7. Mineralogy and Geochemistry of Natural Fission Reactors in Gabon by Janusz Janeczek, p. 321 - 392 Chapter 8. Geomicrobiology of Uranium by Yohey Suzuki and Jillian F. Banfield, p. 393 - 432 Chapter 9. Uranium Contamination in the Subsurface: Characterization and Remediation by Abdessalam Abdelouas, Werner Lutze, and H. Eric Nuttall, p. 433 - 474 Chapter 10. Uranium Mineralogy and the Geologic Disposal of Spent Nuclear Fuel by David Wronkiewicz and Edgar Buck, p. 475 - 498 Chapter 11. Spectroscopic Techniques Applied to Uranium in Minerals by John M. Hanchar, p. 499 - 520 Chapter 12. Infrared Spectroscopy and Thermal Analysis of the Uranyl Minerals by Jiri Cejka, p. 521- 622 Chapter 13. Analytical Methods for the Determination of Uranium in Geological and Environmental Materials by Stephen F. Wolf, p. 623 - 652 Chapter 14. Identification of Uranium-bearing Minerals and Inorganic Phases by X-ray Powder Diffraction by Frances C. Hill , p. 653 - 680
    Location: Reading room
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 16 (1985), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: We exploited the large difference in the solubility of SiO2 and ZrO2 in H2O to constrain precisely the Gibbs energy of formation of zircon (ZrSiO4). Solubility in H2O was determined at 800°C, 1.2 GPa, by weight loss of synthetic zircon crystals. The experiments yielded fine-grained monoclinic ZrO2 as an incongruent solution product uniformly coating zircon crystals. Experiments on the ZrO2-coated zircon crystals were also carried out with an initially slightly SiO2-oversaturated fluid, causing weight gain by zircon regrowth. The mean SiO2 concentration for forward and reverse experiments was 0.069±0.010 mol/kg H2O (2σ). When combined with precise activity–composition measurements for aqueous SiO2, the data constrain the Gibbs free energy of zircon from its oxides at 298 K, 105 Pa, to be −19.30±1.16 kJ/mol (2σ). This determination is comparable in precision to the best measurements obtainable by more conventional methods, which suggests that determination of the thermochemical properties of other important ceramic materials may also be amenable to this method.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The structure and compressibility of synthetic lanthanide-doped zircon (ZrSiO4 with a total of 2.0 mol% trivalent Gd, Dy, Er, Yb, and Y, charge-balanced by addition of P5+) were determined from static compression experiments to 25.9 GPa. The sample bulk modulus, KT0=189±1 GPa is 5% lower than KT0 for undoped zircon, and the sample transforms from the zircon to the scheelite structure above 22.6 GPa, 3 GPa greater than the transformation pressure in pure ZrSiO4. A simple model is presented linking compressibility with unit-cell volume for zircon-structured and scheelite-structured ABO4 compounds, allowing prediction of the compressibility of zircon-structured vanadates and phosphates.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 639-641 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Zwilling has suggested that the events of limb development can be divided into two phases: a morphogenetic phase and a phase of cytodifferentiation1. Limb mesoderm cells have a set of properties during the morphogenetic phase which are responsible for the establishment of general limb form1. The ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell reports 10 (1991), S. 200-203 
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Embryogenic callus initiated from basal segments of micropropagated shoots of Oryza rufipogon were used to initiate cell suspension cultures. After approximately 3 months these cultures were capable of yielding large numbers of protoplasts which underwent sustained division in agarose-solidified medium at a frequency comparable to that observed with Japonica rice protoplasts in previous studies. O. rufipogon plants were reproducibly regenerated from the protoplast-derived callus and are currently being grown to maturity. This is the first report of plant regeneration from protoplasts of a wild species of Oryza.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-2048
    Keywords: Chilling stress ; Hydrogen peroxide ; Glutathione ; Antioxidant enzymes ; Oryza ; Oxidative stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chilling of shoot cultures from Oryza sativa L. cv. Taipei 309, to 4 °C leads to conditions of oxidative stress. Tissue H2O2 was observed to increase more than fourfold by 8 d of chilling, and levels of reduced glutathione, which normally rise in growing shoot cultures at 25 °C, were considerably repressed in chilled cultures. Whilst the activity of ascorbate peroxidase in chilled shoots remained similar to the activities in control cultures at 25 °C, the most notable effects of chilling to 4 °C were the very significant loss of catalase and glutathione reductase activity. Although prior exposure of shoot cultures to abscisic acid (ABA) at 25 °C increased levels of catalase activity, such increased levels were not sustained when the pre-treated cultures were placed at 4 °C. Moreover such pre-treatment with ABA did not increase the subsequent ability of shoot cultures to grow at 4 °C.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell, tissue and organ culture 30 (1992), S. 31-39 
    ISSN: 1573-5044
    Keywords: embryogenic-callus ; Leersia ; Leptochloa ; micropropagation ; Oryza ; wild rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A method was developed for the in vitro clonal propagation of shoots from a range of wild rice and other grass species that have important genetic traits such as drought resistance and salinity tolerance. The axenic multiple shoot cultures, which were suitable for DNA and protein extraction or direct protoplast isolation, could be maintained without subculture for between 2 and 3 months or rapidly multiplied for the subsequent production of mature plants and seeds. Basal sections of the micropropagated shoots also provided novel explants for the production of highly embryogenic callus, from some species, that could be regenerated into green plants. It is envisaged that this clonal propagation technique could aid the genetic manipulation of cultivated rice by providing a means to vegetatively conserve valuable genetic resources, a technique to rapidly multiply novel hybrid material and a source of embryogenic callus that will allow the application of biotechnological techniques, such as somatic hybridization and genetic transformation, to previously unexploited species.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The present investigation was undertaken in an attempt to determine the role played by the nerve in the regeneration of the lower jaw of the adult newt, Triturus viridescens. The results indicated that the number of nerve fibers normally available at the amputation surface was very low compared with that of the newt forelimb. Furthermore, denervation of the lower jaw reduced the number of nerve fibers available to an extremely low level and maintained the number at a low level for up to four weeks without intervening redenervations. The regenerative events in the denervated and amputated lower jaws were indistinguishable histologically from those in amputated jaws having normal innervation. This presented an apparent exception to the general rule that regeneration of external body parts is dependent on the nerve. Several possible explanations are proposed by which this apparent exception might be explained. The process following amputation might be an exaggerated form of wound healing and tissue regeneration which can occur in the absence of nerves. The tissues of the lower jaw might be more sensitive to the influence of those nerve fibers present. The nerve fibers themselves might be qualitatively different and thus exert a greater influence on the tissues.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 2006-07-01
    Print ISSN: 0022-3115
    Electronic ISSN: 1873-4820
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Published by Elsevier
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