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  • 1
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Polymers-Deterioration. ; Radiochemistry. ; Electronic books.
    Description / Table of Contents: Part of the series "New Concepts in Polymer Science", this volume contains information on the main theoretical and practical problems involved in radiation chemistry of polymers.
    Type of Medium: Online Resource
    Pages: 1 online resource (340 pages)
    Edition: 1st ed.
    ISBN: 9781466563353
    DDC: 620.1920422
    Language: English
    Note: Cover -- Half Title -- Series Page -- Title Page -- Copyright Page -- Table of Contents -- Foreword -- Preface -- Lectori -- Nomenclature -- Introduction -- Chapter 1: Main Concepts, Principles, Methods, and Instrumentation of the Radiation Chemistry of Polymers -- 1.1. Types of Ionizing Radiation -- 1.2. Units of Characteristics of the Radiation Field and the Activity of Radionuclides -- 1.3. Sources of Ionizing Radiation -- 1.3.1. Electron Accelerators -- 1.3.2. Long-Lived Radionuclide Sources -- 1.3.3. Radiation-Chemical Gamma Sources -- 1.3.4. Radiation Contours -- 1.4. Dosimetry -- 1.4.1. Direct Dosimetric Methods -- 1.4.2. Indirect Dosimetric Methods -- 1.5. Interaction of Radiation with Matter -- 1.5.1. Primary and Secondary Radiation-Chemical Processes -- 1.5.2. Reversible and Irreversible Radiation Effects -- 1.5.3. Thermal Effects -- 1.6. Calculation of Radiation-Chemical Yields -- Chapter 2: Radiation-Induced Polymerization -- 2.1. Liquid-State and Gas-State Polymerization -- 2.1.1. Kinetics and Mechanism of Radiation-Induced Polymerization -- 2.1.2. Calculation of the Radiation-Chemical Yields of Polymerization -- 2.1.3. Effect of Various Factors on Radiation-Induced Polymerization -- 2.1.4. Gel Effect -- 2.1.5. Post-Effect -- 2.1.6. Conditions and Mechanism of Free-Radical and Ionic Polymerization -- 2.1.7. Main Features of Radiation-Induced Emulsion Polymerization -- 2.1.8. Co-Polymerization -- 2.1.9. Telomerization -- 2.1.10. Side Processes in Radiation-Induced Polymerization, Caused by Monomer Radiolysis -- 2.2. Solid-State Polymerization -- 2.2.1. Fundamental Features of Radiation-induced Solid-State Polymerization -- 2.2.2. Effect of Temperature on Solid-State Polymerization -- 2.2.3. Post-Polymerization -- 2.2.4. Preparation of Stereoregular Polymers -- 2.3. Polymerization in the Glassy State. , 2.4. Principles of Sensitization of Radiation-Induced Polymerization -- 2.4.1. Sensitization Based on Physical Phenomena -- 2.4.2. Sensitization Based on Chemical Phenomena -- Chapter 3: Radiation-Chemical Transformations of Polymers -- 3.1. Modification of Polymers by Graft Co-Polymerization -- 3.1.1. Methods of Graft Co-Polymerization -- 3.1.2. Mechanism and Kinetics of Graft Co-Polymerization -- 3.1.3. Grafting from the Gas Phase -- 3.1.4. Sensitization of Radiation-Induced Grafting -- 3.1.5. Properties of Graft Co-Polymers -- 3.2. Polymer Structurization -- 3.2.1. Main Relationships and Crosslinking Mechanism of Structurization -- 3.2.2. Methods for the Determination of the Radia-tion- Chemical Yield of Crosslinking -- 3.2.3. Crosslinking of Thermoplastics -- 3.2.4. 'Memory' Effect -- 3.2.5. Effect of the Supermolecular Structure of Polymers on Their Radiation-Induced Crosslinking -- 3.2.6. Vulcanization of Elastomers -- 3.2.7. Curing of Oligomers -- 3.2.8. Sensitization of Radiation-Induced Structurization -- 3.3. Polymer Degradation -- 3.3.1. Radiolysis of Macromolecules -- 3.3.2. Sensitization of Degradation (Scission) Processes -- 3.3.3. Determination of Gc and Gs in the Simultaneous Processes of Crosslinking and Scission -- 3.4. Cyclization of Macromolecules -- 3.5. Polymer-analogous Transformations -- 3.5.1. Surface Oxidation of Polymers -- 3.5.2. Halogenation and Sulphochlorination of Polymers -- 3.5.3. Cis-trans Isomerization of Unsaturated Polymers -- 3.6. Stabilization of Radiation-Modified Polymers -- Chapter 4: Radiation Resistance of Polymers and Polymer Materials -- 4.1. Evaluation of Radiation Resistance -- 4.2. Principles of Increasing Radiation Resistance. Radiation Protection -- 4.2.1. Internal Protection -- 4.2.2. External Protection. Anti-rad Additives -- Chapter 5: Fields of Application of the Radiation Chemistry of Polymers. , 5.1. Principles of Selection of Radiation-Chemical Processes for Industrial Use -- 5.2. Choice of Radiation Sources for Various Types of Processes. Organization of Flow Lines and Integrated Power and Chemical Plants Combined with Nuclear Reactors -- 5.3. Radiation-chemical Polymer Processes -- 5.3.1. Polymerization -- 5.3.2. Telomerization -- 5.3.3. Modification of Polymer Materials by Graft Co-Polymerization -- 5.3.4. Production of Heat-Shrinkable and Heat-Expanding Polymer Materials and Articles -- 5.3.5. Production of Thermally Stable and Mechanically Strong Polymer Materials and Products -- 5.3.6. Vulcanization of Rubber Mixes -- 5.3.7. Production of Self-Adhesive Insulating Materials -- 5.3.8. Curing of Coatings and Paints -- 5.3.9. Production of Composite Materials -- 5.3.10. Production of Polymer Carriers for Biomedical Purposes -- 5.3.11. Polymer Degradation -- 5.3.12. Production of Electron and X-Ray Resists -- 5.3.13. Radiation-Resistant Composites -- 5.3.14. Industrial Sewage Treatment -- 5.3.15. Sterilization of Polymer Products for Medical Purposes -- Conclusion -- Control Questions -- Appendix -- Recommended References -- Subject Index.
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  • 2
    In: Journal of geophysical research. C, Oceans, Hoboken, NJ : Wiley, 1978, 113(2008), 2169-9291
    In: volume:113
    In: year:2008
    In: extent:15
    Description / Table of Contents: A mesoscale eddy formed by the interaction of inflows of Atlantic water (AW) from Fram Strait and the Barents Sea into the Arctic Ocean was observed in February 2005 off the Laptev Sea continental slope by a mooring equipped with a McLane Moored Profiler. The eddy was composed of two distinct, vertically aligned cores with a combined thickness of about 650 m. The upper core of approximately ambient density was warmer (2.6°C), saltier (34.88 psu), and vertically stably stratified. The lower core was cooler (0.1°C), fresher (34.81 psu), neutrally stratified and ~0.02 kg/m3 less dense than surrounding ambient water. The eddy, homogeneous out to a radius of at least 3.4 km, had a 14.5 km radius of maximum velocity, and an entire diameter of about 27 km. We hypothesize that the eddy was formed by the confluence of the Fram Strait and Barents Sea AW inflows into the Arctic Ocean that takes place north of the Kara Sea, about 1100 km upstream from the mooring location. The eddy's vertical structure is likely maintained by salt fingering and diffusive convection. The numerical simulation of one-dimensional thermal and salt diffusion equations reasonably reproduces the evolution of the eddy thermohaline patterns from the hypothesized source area to the mooring location, suggesting that the vertical processes of double-diffusive and shear instabilities may be more important than lateral processes for the evolution of the eddy. The eddy is able to carry its thermohaline anomaly several thousand kilometers downstream from its source location.
    Type of Medium: Online Resource
    Pages: 15 , graph. Darst
    ISSN: 2169-9291
    Language: English
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  • 3
    In: Journal of climate, Boston, Mass. [u.a.] : AMS, 1988, 21(2008), 2, Seite 364-384, 1520-0442
    In: volume:21
    In: year:2008
    In: number:2
    In: pages:364-384
    Description / Table of Contents: Recent observations show dramatic changes of the Arctic atmosphereiceocean system. Here the authors demonstrate, through the analysis of a vast collection of previously unsynthesized observational data, that over the twentieth century the central Arctic Ocean became increasingly saltier with a rate of freshwater loss of 239 ± 270 km3 decade-1. In contrast, long-term (1920-2003) freshwater content (FWC) trends over the Siberian shelf show a general freshening tendency with a rate of 29 ± 50 km3 decade-1. These FWC trends are modulated by strong multidecadal variability with sustained and widespread patterns. Associated with this variability, the FWC record shows two periods in the 1920s-30s and in recent decades when the central Arctic Ocean was saltier, and two periods in the earlier century and in the 1940s-70s when it was fresher. The current analysis of potential causes for the recent central Arctic Ocean salinification suggests that the FWC anomalies generated on Arctic shelves (including anomalies resulting from river discharge inputs) and those caused by net atmospheric precipitation were too small to trigger long-term FWC variations in the central Arctic Ocean; to the contrary, they tend to moderate the observed long-term central-basin FWC changes. Variability of the intermediate Atlantic Water did not have apparent impact on changes of the upperArctic Ocean water masses. The authors’ estimates suggest that ice production and sustained draining of freshwater from the Arctic Ocean in response to winds are the key contributors to the salinification of the upper Arctic Ocean over recent decades. Strength of the export of Arctic ice and water controls the supply of Arctic freshwater to subpolar basins while the intensity of the Arctic Ocean FWC anomalies is of less importance. Observational data demonstrate striking coherent long-term variations of the key Arctic climate parameters and strong coupling of long-term changes in the ArcticNorth Atlantic climate system. Finally, since the high-latitude freshwater plays a crucial role in establishing and regulating global thermohaline circulation, the long-term variations of the freshwater content discussed here should be considered when assessing climate change and variability.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1520-0442
    Language: English
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  • 4
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and experimental chemistry 9 (1975), S. 193-196 
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Publication Date: 2014-10-10
    Description: A distinct, subsurface density front along the eastern St. Anna Trough in the northern Kara Sea is inferred from hydrographic observations in 1996 and 2008–2010. Direct velocity measurements show a persistent northward subsurface current (~ 18 cm s−1) along the St. Anna Trough eastern flank. This sheared flow, carrying the outflow from the Barents and Kara seas to the Arctic Ocean, is also evident from shipboard observations as well as from geostrophic velocities and numerical model simulations. Although we cannot substantiate our conclusions by direct observation-based estimates of mixing rates in the area, we hypothesize that the enhanced vertical mixing along the St. Anna Trough eastern flank favors the upward heat loss from the intermediate warm Atlantic water layer. Modeling results support this hypothesis. The upward heat flux inferred from hydrographic data and model simulations is of O(30–100) W m−2. The region of lowered sea ice thickness and concentration seen both in sea ice remote sensing observations and model simulations marks the Atlantic water pathway in the St. Anna Trough and adjacent Nansen Basin continental margin. In fact, the sea ice shows a delayed freeze-up onset during fall and a reduction in the sea ice thickness during winter. This is consistent with our results on the enhanced Atlantic water heat loss along the Atlantic water pathway in the St. Anna Trough.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 8
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 9
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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