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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Environmental chemistry. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (270 pages)
    Edition: 1st ed.
    ISBN: 9783540461135
    Series Statement: The Handbook of Environmental Chemistry Series ; v.4 / 4B
    DDC: 577.276
    Language: English
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Radiation, Background. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (307 pages)
    Edition: 1st ed.
    ISBN: 9780080474892
    Series Statement: Issn Series ; v.Volume 10
    DDC: 363.72892
    Language: English
    Note: Front cover -- Radioactivity in the Terrestrial Environment -- Copyright page -- Contents -- Chapter 1. Introduction -- 1. Radionuclides in the environment -- 2. Sources and attributes of radionuclides -- 3. The aims and methods of radioecology -- 4. Key topics in terrestrial radioecology -- References -- Chapter 2. Behaviour of radionuclides in soil/crop systems following contamination -- 1. Introduction -- 2.Physical and chemical behaviour of relevant radionuclides in arable soils -- 3. Physiological aspects of crop root-uptake and translocation of radionuclides in arable systems -- 4. Quantification of soil-plant transfer -- 5. Overall mass/activity balances of radionuclides in arable systems -- 6. Possible countermeasures -- 7. Conclusions -- Acknowledgements -- References -- Chapter 3. Phytoremediation of soils contaminated with radionuclides -- 1. Phytoremediation-a 21st century challenge for radioecology -- 2. A phytoremediation perspective on the biogeochemistry of radionuclides -- 3. Phytoremediation of soil contaminated with radionuclides -- 4. Assessing the feasibility of phytoremediation of radionuclides using a simple model -- 5. The future of phytoremediation for radionuclides -- 6. Conclusions and prospects -- References -- Chapter 4. Transfer of radionuclides in animal production systems -- 1. Introduction -- 2. Animal production systems -- 3. Transfer of radionuclides to animals -- 4. Quantification of the transfer of radionuclides in animal products -- 5. Countermeasures -- 6. Concluding remarks -- References -- Chapter 5. Radionuclides in grassland, heath, mire and mountain ecosystems -- 1. Introduction -- 2. Global distribution of fallout and affected ecosystems -- 3. The material cycles in ecosystems -- 4. The importance of soil properties for bioavailability -- 5. Time-dependent changes in bioavailability. , 6. Partitioning and fluxes of radionuclides -- 7. Seasonality -- 8. Plant species differences -- 9. The influence of management -- 10. Conclusions -- List of plant species mentioned -- References -- Chapter 6. Radionuclides in forest ecosystems -- 1. Forests as receptors of atmospheric pollutants -- 2. Relevant time scales -- 3. Pathways and processes within forests -- 4. Radionuclides in forests after Chernobyl -- 5. Strontium in forests -- 6. Plutonium in forests -- 7. Technetium in forests -- 8. Iodine and chlorine in forests -- 9. Radiation exposures associated with forest products -- 10. Conclusions -- References -- Chapter 7. Radioecology of terrestrial arctic ecosystems -- 1. Introduction -- 2. The arctic terrestrial environment -- 3. Radionuclides in arctic terrestrial ecosystems -- 4. Arctic specific processes -- 5. Conclusions -- References -- Chapter 8. The distribution and transport of radionuclides in dryland ecosystems -- 1. Introduction -- 2. Characteristics of dryland ecosystems -- 3. Sources of radionuclides in dryland environments -- 4. Radioecology in dryland ecosystems -- 5. Radionuclide distribution in arid ecosystems -- 6. Conclusions -- References -- Chapter 9. Radionuclides in tropical and subtropical ecosystems -- 1. Introduction -- 2. Input of fallout radionuclides in tropical areas and critical foods for human intake of radionuclides -- 3. Soil-to-crop transfers of radionuclides in (sub-)tropical areas -- 4. Paddy field ecosystems -- 5. Radioecology of the Marshall Islands -- 6. Conclusions -- Acknowledgements -- References -- Chapter 10. Naturally occurring radionuclides from industrial sources: characteristics and fate in the environment -- 1. Introduction -- 2. Geochemical behavior of naturally occurring radionuclides in the lithosphere -- 3. Form, fate and transport of radionuclides in the biosphere. , 4. Bioavailability -- 5. Oil and natural gas production and processing -- 6. Phosphate fertilizer and elemental phosphorus production -- 7. Water and wastewater treatment residuals -- 8. Coal mining and combustion -- 9. Mineral sands -- 10. Site reclamation -- 11. Assessing radionuclide partitioning in TENORM disposal environments -- References -- Chapter 11. Protection of the environment from exposure to ionising radiation -- 1. Introduction -- 2. The current conceptual basis for protection of the environment from ionising radiation -- 3. State of the art at the end of the 20th century -- 4. Developments at the national level -- 5. Developments at the international level -- 6. Example of the Environment Agency assessment approach in England and Wales -- 7. The Tees estuary assessment-a case study -- 8. Conclusions-significance for regulators and operators -- Acknowledgements -- References -- Chapter 12. Concluding remarks -- References -- Author Index -- Keyword Index.
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 4249-4251 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Energy and time-resolved photoluminescence data have been obtained for nominally undoped (n 4.5×1015 cm−3) bulk InP grown by the vertical-gradient freeze method. The data were taken as a function of temperature, from 80 to 290 K, and analyzed using a solution to the continuity equation. The resulting lifetime values range from 300 ns to 3.2 μs, and surface recombination velocities were fund to be on the order of 103 cm/s. The temperature dependence can be explained by assuming a radiatively limited recombination with a resulting B coefficient ≥5.9×10−11 cm3/s at 300 K.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 1629-1635 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The annealing behavior of the reverse bias current-voltage curves of 1 MeV electron irradiated In0.53Ga0.47As photodiodes has been measured at 300 K. The observed decay is shown to be correlated with the reduction of the E2 peak height with time, as measured by deep level transient spectroscopy. The reverse current is found to decay with a logarithmic time dependence, which can be explained by a model in which the annealing of the E2 defects is controlled by a distribution of thermal energy barriers.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 7244-7249 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The reverse dark current-voltage (dark I-V) curves of InGaAs photodiodes have been measured as a function of temperature following irradiation with 1-MeV electrons. Prior to irradiation, the I-V curves are well described by a diffusion term alone indicating that the junctions are of good quality. Irradiation produces a large increase in the generation current which can be modelled as resulting from a single defect center with an energy Ec−0.29 eV. Such a defect center called E2 has been detected using deep level transient spectroscopy.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5373-5375 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An extensive study of the low-field (μ0H ≤ 8 mT) dc initial susceptibility χin has been performed using micrometer-sized HTSC powders of varying sizes and methods of preparation. It is found, as before, that χin(T) is essentially constant for T (approximately-less-than) 0.4Tc. This supports s-wave pairing and implies no zeros of the gap on the fermi surface. Additionally, χin(T) finds reasonable description in a London model for superconducting spheres and a two-fluid model λ(T).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 29 (1907), S. 1747-1750 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 36 (1981), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The accumulation of the polyamine spermine into 0.1-mm prisms of rat cerebral cortex has been investigated at both 37°C and at 4°C. Kinetic analysis of the temperature-sensitive portion of uptake indicates two high-aftinity saturable components together with an unsaturable component at high concentrations. The ‘very high’– affinity saturable system (Km= 3.8 nM) was temperature- and sodium-dependent, and significantly reduced by metabolic inhibitors, findings that are consistent with an active transport system for spermine into brain tissue. The ‘high’– affinity saturable component (Km= 0.44 μM) was sodium-dependent and inhibited by ouabain, but only partially susceptible to inhibition by 2,4-dinitrophenol and sodium cyanide. The significance of these results with respect to the function of spermine in the central nervous system is discussed.
    Type of Medium: Electronic Resource
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