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  • 1
    Electronic Resource
    Electronic Resource
    Uranium assay in various tobaccos using SSNTDs technique
    Amsterdam : Elsevier
    International Journal of Radiation Applications & Instrumentation. Part D, 12 (1986), S. 781-784 
    Details
    ISSN: 1359-0189
    Keywords: (Uranium ; SSNTD) ; Snuff ; Tobacco
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/1359-0189(86)90701-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Toughened epoxy modified with phenol-nonyl phenol based polymer (2005)
    Bingley : Emerald
    Pigment & resin technology 34 (2005), S. 184-189 
    Details
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Purpose - To evaluate the efficiency of modifying epoxy resin using phenol-nonyl phenol based polymer (PNPF) for toughness improvement and optimise the results of such a modification. Design/methodology/approach - For effective toughening, various compositions were made by incorporating PNPF at different concentrations. The impact and adhesive strengths of the unmodified and modified epoxy networks were characterised. Findings - The modification of epoxy resin using PNPF showed significant enhancement of impact and adhesive strengths over the unmodified one. The modification caused the formation of a chemical linkage between PNPF and resin which led not only to a phase separation, but also to formation of intrinsically strong chemical bonds across the PNPF phase/resin matrix interphase, which was the main cause of the improved impact and adhesive strengths. The optimum results were obtained at 10?phr (parts per 100 parts of epoxy resin) of modifier. Research limitations/implications - The modifier, PNPF, used in the present context was synthesised from phenol, nonyl phenol and formalin using oxalic acid as catalyst. Practical implications - The developed method provided a simple and practical solution to improving the toughness of a cured epoxy. Originality/value - The method for enhancing toughness of a cured epoxy was novel and could find numerous applications in the surface coating and adhesive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03699420510609060
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Crystallochemical analysis of charge and spin dynamics in YBCO substituted by trivalent metal ions at Cu site
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 185-189 (1991), S. 739-740 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(91)91593-S
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Wegener's granulomatosis in North India (1987)
    Springer
    Rheumatology international 7 (1987), S. 243-247 
    Details
    ISSN: 1437-160X
    Keywords: Wegener's granulomatosis ; Clinical features ; Tuberculosis ; Cyclophosphamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Eleven patients with Wegener's granulomatosis were seen at this Institute over a period of 20 years. There were six men and five women. The average age of presentation was 38.3 years, and the mean duration of symptoms was 10.5 months. Constitutional symptoms (82%), cough (82%), ocular symptoms (64%), arthralgias (55%), rhinorrhoea (55%), haemoptysis (45%), nasal granuloma (45%), otorrhoea (36%), sinusitis (36%), skin lesions (27%), and renal failure (27%) were the clinical manifestations encountered. All patients had an elevated ESR, and 55% had leucocytosis. Proteinuria and haematuria were observed in 64% and 55% respectively. Chest radiographs were abnormal in 82%. In four patients the disease had a fulminant course and the patients died before adequate treatment was given. Two patients received corticosteroids alone and have since been lost to follow up. Five (45%) received adequate cytotoxic therapy and have done well for 8–46 months (mean, 24.8 months) after diagnosis. Wegener's granulomatosis in India is apparently similar to that seen elsewhere, but the high incidence of tuberculosis interferes with early diagnosis and treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00270523
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal, Mechanical and Morphological Performance of BisGMA/TiO〈sub〉2〈/sub〉 Nanocomposite (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 29-30 (Nov. 2007), p. 241-244 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Vinyl ester BisGMA [Bisphenol-A-glycidyldimethacrylate] resin has been modified byincorporating Titanium dioxide(TiO2)nanoparticles (0.5%-2% by weight). An ultrasonic mixingprocess was employed to disperse the particles into the resin system prior to casting and curing testspecimens. From TEM investigation, it is found that the particles are nano size (5-60nm) anddispersed throughout the entire volume of the resin. Dynamic mechanical analysis was conductedfor both the neat resin and nanocomposite. In dynamic mechanical analysis, nanocomposite showsincrease in storage modulus (6%), and glass transition temperature (5.8%) from neat resin system.Thermogravimetric analysis shows 7.5% better thermal stability. In addition, the nanocompositeshows enhance in the stiffness by 5% in flexural loading. The Tg and flexural modulus of thenanocomposites were enhanced as the particle volume fraction was enhanced and than decreased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.29-30.241.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Silver Substitution Effect in Growth of Order in Oxygen Disorder 123 Type Cuprate Superconductors (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 223-224 (July 1996), p. 377-380 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.223-224.377.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    DC Electrical Resistivity Study of Granularity in YBa2CU3O7/Ag Composites (1998)
    Springer
    Journal of superconductivity 11 (1998), S. 641-648 
    Details
    ISSN: 1572-9605
    Keywords: Superconductivity ; Ag composites ; percolation ; granularity ; weak-link resistivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Temperature-dependent electrical resistivity in a set of YBa2Cu3O7−x /Ag composites, all prepared under an identical sintering schedule, is analyzed to extract granularity information. The weak-link resistivity ρ wl across the grain boundaries and the percolation factor α arising due to current frustration caused by misalignment of anisotropic grains and sample defects such as voids and cracks are estimated from the residual resistivity ρ0 and the temperature coefficient of resistivity dρ/dT. Variation of these parameters with Ag vol.% quantifying the extent of granularity indicates that granularity in the composites decreases and their electrical characteristics tend to be identical to that of Ag-free YBa2Cu3O7−x single crystals and epitaxial thin films as Ag vol.% approaches a value where onset of current percolation occurs through Ag channels. The increased α and decreased ρ wl observed at higher Ag vol.% explains the larger grains in the composites with narrow size distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022609432697
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  • 8
    Electronic Resource
    Electronic Resource
    Metastability-induced charge and spin fluctuations in 123 type superconductors (1993)
    Springer
    Journal of superconductivity 6 (1993), S. 359-364 
    Details
    ISSN: 1572-9605
    Keywords: Vacancy ordering/disordering ; charge fluctuation ; spin fluctuation ; oxygen coordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Various defects arising from lattice mismatch and coordination incompatibility at the cation sites are known to lend the cuprates a metastable state at temperatures and pressures where they exhibit superconductivity. The present paper considers the metastability induced by coordination incompatibility at Cu(1) sites in oxygen-deficient 123 type systems and looks for their possible effects on charge and spin degrees of freedom. Depending upon the concentration of oxygen vacancies, the resulting unstable charge state at the Cu(1) sites is shown to either temporally fluctuate or spatially equilibrate, providing a mechanism for the 90 K and the 60 K plateaus, with a peak in the former observed in the YBa2Cu3O7-y , samples prepared under thermodynamic equilibrium conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617972
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