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  • 1990-1994  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Reversibility of cerebral ischaemia dynamic and xenon computed tomography study on ischaemic cerebrovascular disease (1994)
    Springer
    Acta neurochirurgica 127 (1994), S. 151-156 
    Details
    ISSN: 0942-0940
    Keywords: Dynamic CT ; xenon CT ; ischaemic cerebrovascular disease ; reversibility of ischaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Flow studies using dynamic CT and xenon (Xe) CT were carried out in 25 patients with ischaemic stroke in the territory of the middle cerebral artery to define the clinical characteristics of cerebral ischaemia at a chronic stage. The parameter of peak height/mean transit time (PH/MTT) obtained from dynamic CT can provide an accurate index for blood circulation in the cerebral vascular bed. Xe CT measurements revealed various kinds of ischaemia around the infarction even in the chronic stages. In mild ischaemia of more than 30ml/100g/min, reduction of cerebral blood flow (CBF) was well correlated to the PH/MTT. However, in severe ischaemia between 20 and 30 ml/100 g/ min, changes of CBF were no longer correlated with the PH/MTT. There were cases showing severe reduction of CBF but which showed sufficient blood circulation (moderate value of PH/MTT). Mild reductions of CBF in parallel with decreased blood supply were often found in the peri-infarct area of infarctions in the centrum semiovale. On the other hand, infarctions in the cortico-subcortical region showed severe ischaemia, in even where blood circulation was relatively well sustained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01808758
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Superconducting thin films of Bi-Pb-Sr-Ca-Cu-O synthesized by the spray-inductively coupled plasma technique (1991)
    Springer
    Journal of materials science 26 (1991), S. 5929-5932 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Superconducting thin films of Bi-Pb-Sr-Ca-Cu-O were synthesized on polycrystalline MgO substrates by injecting atomized aqueous solutions of appropriate nitrates into an inductively coupled r.f. plasma (ICP) under atmospheric pressure (the spray-ICP technique). 1–2 μm thick films composed ofc-axis oriented phases (c=2.4 and 3.0 nm) could be synthesized in runs of 15–20 min. The phase compositions of the films were varied fromc=2.4 nm phase toc=3.0 nm phase through their mixed phases by increasing the distance of the substrates from the ICP. In some cases the mixed phases contained a small amount ofc=3.7 nm phase. Annealing in air (850 °C for 10 min and then 800 °C for 5 h) convertedc=2.4 nm phase toc=3.0 nm phase. The best as-deposited film showedT c (resistance = 0) at 55 K, and after annealing its resistance began to drop around 110 K and reached zero at 75 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01130136
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis of ultrafine single-component oxide particles by the spray-ICP technique (1992)
    Springer
    Journal of materials science 27 (1992), S. 679-684 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultrafine oxide particles were synthesized by introducing aqueous solutions of metal salts into a high-temperature r.f. inductively coupled plasma (the spray-ICP technique). The particles synthesized were spherical for ZrO2, Y2O3, Sm2O3, La2O3, δ-Al2O3, TiO2 (anatase), β-Bi2O3 and CuO, plate-like for Nd3O2, Cr2O3 and Pr2O3, polyhedral for PrO2, CeO2 and γ-Fe2O3, cubical for NiO, MgO, CaO, Co3O4 and Mn3O4, bar-like for SnO2 and ZnO, and foil-like for β-PbO and MoO3. The products of the alkaline earth group except for magnesium, were hydroxides and/or carbonates, spoiled by atmospheric H2O and/or CO2. The particle morphology suggests that particle growth is controlled predominantly by the gas-solid reaction occurring on the surface of nuclei condensed from the gas phase. Some of the oxides revealed a particle morphology characteristic of their crystal structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00554036
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Deposition of TiO2 on heated substrates by the spray-inductively-coupled-plasma technique (1993)
    Springer
    Journal of materials science 12 (1993), S. 1854-1855 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: 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/BF00540009
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of ultrafine single-component oxide particles by the spray-ICP technique (1992)
    Springer
    Journal of materials science 27 (1992), S. 679-684 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultrafine oxide particles were synthesized by introducing aqueous solutions of metal salts into a high-temperature r.f. inductively coupled plasma (the spray-ICP technique). The particles synthesized were spherical for ZrO2, Y2O3, Sm2O3, La2O3, δ-Al2O3, TiO2 (anatase), β-Bi2O3 and CuO, plate-like for Nd3O2, Cr2O3 and Pr2O3, polyhedral for PrO2, CeO2 and γ-Fe2O3, cubical for NiO, MgO, CaO, Co3O4 and Mn3O4, bar-like for SnO2 and ZnO, and foil-like for β-PbO and MoO3. The products of the alkaline earth group except for magnesium, were hydroxides and/or carbonates, spoiled by atmospheric H2O and/or CO2. The particle morphology suggests that particle growth is controlled predominantly by the gas-solid reaction occurring on the surface of nuclei condensed from the gas phase. Some of the oxides revealed a particle morphology characteristic of their crystal structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403879
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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