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  • 11
    Electronic Resource
    Electronic Resource
    Effect of Divalent Elements on the Grain Growth of TZP (1999)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 304-306 (Feb. 1999), p. 471-476 
    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/2011/0528/02/04/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.304-306.471.pdf
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  • 12
    Electronic Resource
    Electronic Resource
    Effect of CoO Doping on the Sintering Ability and Mechanical Properties of Y-TZP (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 449-452 (Mar. 2004), p. 265-268 
    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
    Notes: The effect of CoO addition into Y-TZP (Yttria doped Tetragonal Zirconia Polycrystals) was studied on the evolution of its sintering ability, grain size, grain boundary structure and mechanical properties. The doping of a small amount of CoO effectively reduced the sintering temperature. A small amount of CoO up to ~ 0.3 mol% was effective for the suppression of grain growth, but the addition of 1.0 mole % resulted in an enhanced grain growth. The hardness and toughness of the CoO doped TZP were about the same as those of undoped TZP. Furthermore, despite the grain refinement, CoO doped TZP did not exhibit improved mechanical properties. Thismay be suggesting that CoO dopant had weakened the grain boundary strength
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/08/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.449-452.265.pdf
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  • 13
    Electronic Resource
    Electronic Resource
    Dose Rate Dependence of Ion-Induced-Damage in Si Evaluated by Spectroscopic Ellipsometry (2001)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 78-79 (Apr. 2001), p. 341-344 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/26/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.78-79.341.pdf
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  • 14
    Electronic Resource
    Electronic Resource
    Studies on the oxygen stoichiometry in superconducting cuprates by thermoanalytical methods (1997)
    Springer
    Journal of thermal analysis and calorimetry 48 (1997), S. 1123-1141 
    Details
    ISSN: 1572-8943
    Keywords: oxygen stoichiometry ; superconductors ; themal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Thermoanalytical methods provide important means for studying oxygen stoichiometries in highT c superconducting cuprates. The optimum annealing temperature for a desired oxygen content in the superconducting product or in related materials can be established by thermogravimetric measurements. By performing the final annealing in a thermobalance the amount of the incorporated or released oxygen can be conveniently both controlled and determined. Furthermore, the absolute oxygen content in the end product can be analyzed by the thermogravimetric reduction method. Finally, the stability of the oxygen content under various atmospheres can be checked utilizing either thermogravimetric or differential thermal analysis techniques. The potential and applications of thermal analysis within the above themes of cuprate superconductor research are reviewed and discussed using illustrative examples from the authors' own experimental works as well as from the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01979158
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  • 15
    Electronic Resource
    Electronic Resource
    Hormone-cytokine response (1997)
    Springer
    Surgical endoscopy and other interventional techniques 11 (1997), S. 907 -910 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Laparoscopic cholocystectomy — Pneumoperitoneum — Wall-lifting — Hormone — Cytokine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Changes in blood hormone and cytokine were investigated in patients who underwent laparoscopic cholecystectomy via insufflation (CO2 group) vs those who had abdominal wall-lifting (Air group). Methods: Seventeen female patients with cholecystolithiasis were randomly divided into two groups. Peripheral blood samples were obtained during perioperative period, and plasma hormone levels (ACTH, cortisol) and serum cytokine levels (TNFα, IL-1β, IL-6, IL-10) were measured. Results: The number of circulating lymphocytes significantly decreased at 1 h after surgery in both groups, but the decrease in the CO2 group was significantly smaller than that in the Air group. There was no significant difference in hormone elevation between groups. Serum concentrations of IL-6 and IL-10 in the Air group were significantly higher than in the CO2 group. Conclusions: CO2 insufflation may reduce cytokine production in laparoscopic cholecystectomy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649900484
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  • 16
    Electronic Resource
    Electronic Resource
    Processing and utilization of sugi (Cryptomeria japonica D. DON) barks – preparation and grading of fibers (1999)
    Springer
    Holz als Roh- und Werkstoff 57 (1999), S. 150-151 
    Details
    ISSN: 1436-736X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001070050031
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  • 17
    Electronic Resource
    Electronic Resource
    Control of Hole Distribution and Superconducting Properties in Bi2Sr2(Ca1-x Y x )Cu2O8+δ (1999)
    Springer
    Journal of low temperature physics 117 (1999), S. 837-841 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dependence of Hirr on the concentration and distribution of holes in the Bi2Sr2(Ca1-xYx)Cu2O8+δ (Bi-2212) system was investigated. Coulometric Cu(I)/(II) and Fe(II)/(III) titrations were applied to determine oxygen contents and distinct Cu and Bi valences and to thereby estimate the hole distribution among the $$SrO - Bi_2 O_{2 + \delta ^ - } SrO$$ and (Ca1-xYx)Cu2O4 blocks. With increasing Y-substitution level, x, continuous increase in the oxygen content and decrease in the thickness of the $$SrO - Bi_2 O_{2 + \delta ^ - } SrO$$ “blocking” block were observed. The extra oxygen taken in the structure only partially counteracts the trivalent-Y to divalent-Ca substitution, and consequently the hole concentration in both blocks was found to decrease. With increasing x and δ, Hirr was not enhanced but rather depressed. This suggests that the thickness of the blocking block is not the primary parameter in determining the Hirr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022530219507
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  • 18
    Electronic Resource
    Electronic Resource
    Peak Effect Caused by Compositional Modulation in Superconducting (Hg,Pb)(Ba,Sr)-1223 Single Crystal (1999)
    Springer
    Journal of low temperature physics 117 (1999), S. 933-937 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have discovered fish-tail phenomenon / peak effect in a (Hg,Pb)(Ba,Sr) 2 Ca 2 Cu 3 O 8+δ [(Hg,Pb)(Ba,Sr)-1223] single crystal. Microscopic analyses and observations were performed to elucidate the origin of peak effect in terms of the micro-structure of the (Hg,Pb)(Ba,Sr)-1223 single crystal. In a [001] ED pattern of the crystal, streaks were observed along 〈110〉 at each spot. Distortions were seen along 〈110〉 in HRTE-micrograph of the (001) plane, and a compositional modulation was clearly detected with respect to the Hg/Pb ratio along [110] with an average periodicity of ∼18 nm. Such a spinodal-wave-like inhomogeneity in the local composition may yield mesoscopically distributed weak pinning centers which is most likely responsible for the appearance of peak effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022563226776
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  • 19
    Electronic Resource
    Electronic Resource
    Control of Carrier Distribution for Tailoring Superconducting Properties of Layered Cuprates (1999)
    Springer
    Journal of low temperature physics 117 (1999), S. 813-822 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A general view has been developed to correlate spatial inhomogeneity in the carrier density over different dimensions in crystals of high-T c cuprate superconductors to basic superconducting properties such as T c , H irr and “peak effect”. Employing the BVS concept, it is shown that there are three different routes for doping the CuO 2 plane with holes, and that the more confined holes are in the middle of the CuO 2 -plane stack, the higher is T c . With the Cu(Ba,Sr) 2 (Yb,Ca)Cu 2 O 6+z system it is shown that the distribution of holes is different when holes are generated with different doping routes, and further that the more homogeneous the hole distribution along the c axis is, the better is the H irr characteristics. This agrees with observations made for Hg-1223 and Cu-1223 that the more overdoped these phases are, the more improved is the H irr characteristics. Studies on peak effect in various high-T c superconductors indicate that some mesoscopical inhomogeneity in oxygen content or hole density causes the peak. Thus control of hole density over dimensions from atomic bonds to tens of nanometers is essential in tailoring the fundamental superconducting properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022574001761
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  • 20
    Electronic Resource
    Electronic Resource
    Superconducting Cuprates with Charge Reservoir Consisting of either Peroxide-type Oxygen or H2O (1999)
    Springer
    Journal of low temperature physics 117 (1999), S. 843-847 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two novel homologous series of superconductive M-m2(n-1)n copper oxides with the charge-reservoir block consisting of either peroxide-type oxygen [0 (Ba) 2(n-1)n phases] or water [H-m2(n-1)n phases] are reported. The former phases with T c 's higher than 100 K are obtained in the Ba-Ca-Cu-O system from high-pressure synthesis under oxidizing conditions. When exposed to open air, the latter phases spontaneously form from the highly unstable 0 (Ba) 2(n-1)n phases due to incorporation of H 2 O molecules into the structure when exposed to open air. Besides water, the phase change is believed to involve additional protons from a redox reaction between water and the highly oxidized copper/peroxide-type oxygen of the 0 (Ba) 2(n-1)n phases. Upon the phase change the 0 (Ba) 2(n-1)n phases are reduced considerably, as was also confirmed by wet-chemical redox analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022582303578
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