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  • 2005-2009
  • 1985-1989  (5)
  • 1988  (2)
  • 1985  (3)
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  • 2005-2009
  • 1985-1989  (5)
Year
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5452-5452 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Transparent iron-oxide films were fabricated by sol-gel synthesis using a solution of ferric nitrate (III) dissolved in ethylene glycol.1 The solution was kept at 80 °C and stirred constantly in a nitrogen atmosphere. The gel with an appropriate viscosity was spin coated on soft glass plates, then dried and heated in air at various temperatures for 5 h. The films thus prepared are about 0.2 μm thick, amber colored, and especially transparent in the near-infrared region, whose transmittance exceeds 90%. Maximum saturation magnetization 4πMs=0.74 kG [curve (a)] was obtained by annealing at 450 °C, which is still insufficient to use practical application. Reduction heat treatment in a hydrogen atmosphere is found to be very effective to improve magnetic properties: 4πMs is increased to 3 kG [curve (b)], which is about four times as large as the previous one, but the films become semitransparent due to formation of magnetite particles. Original high transmittance recovers by successive annealing in air at 400 °C without any degradation of magnetic properties [curve (c)], where diffraction peaks of maghemite were observed. This strongly suggests that magnetic anisotropy may be arbitrarily controlled by forming linear chains of ferromagnetic particle clusters through reduction heat treatment in a magnetic field. Faraday rotation θF of the samples was also measured. These films are promising as a new type magneto-optic material.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3882-3884 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magneto-optical, compositional, and magnetic properties of Biz(LuSmPb)3−zFe5O12 (z=0.05–0.9) grown epitaxially on Nd3Ga5O12 substrates from melts with different PbO/Bi2O3 ratios were studied. Chemical analysis by an x-ray microanalyzer indicates that Bi is incorporated into these films primarily by replacing Sm. Room-temperature Faraday rotation θF was measured at a wavelength of 633 nm. θF is proportional to Bi concentration z in the film and is −2×104 deg/cm for z=1.0. θF of Ga-substituted films for a Ga concentration of 0.6 was about 20% smaller than that of the unsubstituted film. The magnetic uniaxial anisotropy field Hk measured by a vibrating sample magnetometer ranged from 2500 to 5400 Oe. From the analysis of Hk data, it was found that Pb-Lu and Bi-Lu pairs were major contributors to Hk of the present garnet films.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 15 (1985), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In vitro IgE secretion by atopic and normal peripheral-blood lymphocytes was examined in culture with pokeweed mitogen or Staphylococcus aureus strain Cowan-I (StaCw) or without mitogen. IgE secreted in culture supernatants was measured with double antibody radioimmunoassay. Enumeration of IgE-secreting cells was made by a protein-A plaque assay. IgE was detected in increasing quantities in supernatants of cultured lymphocytes without mitogen up to the 12th day. IgE-plaque-forming cells were formed by the lymphocytes in large numbers on days 4–7 in cultures with mitogen. These results suggest that not only mitogen-independent but also mitogen-dependent subpopulations may exist in the IgE-secreting cells.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 73 (1988), S. 337-364 
    ISSN: 1432-2234
    Keywords: Triplet instability ; Radical character ; Spin projected UMP ; Reaction mechanism ; Transition structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The triplet-instability analysis of the closed-shell RHF solutions has been carried out in relation to the orbital and spin correlation effects for various transition structures (TS) and reaction intermediates. It is found that the RHF solutions even for cyclic transition states of the Woodward-Hoffmann symmetry-allowed reactions often involve the triplet instability, indicating the crucial role of correlation corrections. The di- and tetra-radical characters for the transition structures are calculated by the projected UHF (PUHF) solutions resulting from the instability. The spin projection is also crucial for the UHF Møller-Plesset (UMP) correlated wavefunctions obtained for the transition structures of 1,3-dipolar, Diels-Alder, ene and related reactions. The relative stability between cyclic and acyclic TS for these reactions is examined at the approximately projected UHF MP2 (APU MP2) level. The former is found to be more favorable than the latter if the correlation correction is taken into account for TS in a well-balanced manner.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Wir berichten über unsere Studien zu Superinfektionen bei Infektionen der Atemwege, die von 1981–1984 behandelt wurden. Die isolierten Stämme vonStaphylococcus aureus, Staphylococcus epidermidis, Streptococcus faecalis undStreptococcus faecium sowie von Glukose nicht fermentierenden gramnegativen Stäbchen wiePseudomonas aeruginosa waren resistent gegen Cephem-Antibiotika der dritten Generation. Es zeigte sich, daß diese Erreger in den Krankenhäusern weit verbreitet waren; sie wurden häufig aus Sputum, Lungenexzisaten und Herzblut isoliert. Untersuchungen zur Kolonisation des Sputums vor, während und nach der Therapie mit Cephem-Antibiotika der dritten Generation ließen eine Tendenz für das Auftreten dieser Bakterien im Anschluß an die Behandlung erkennen. Unter den grampositiven Kokken warS. faecium am resistentesten gegen diese Antibiotika,S. faecalis, S. epidermidis undS. aureus zeigten eine in der genannten Reihenfolge geringgradigere Resistenz. Die Inzidenz resistenter Isolate war 1984 höher als 1983, was auf eine jährliche Zunahme resistenter Bakterien schließen läßt.
    Notes: Summary This paper is a report on our studies on superinfections in respiratory tract infections treated during the years 1981–1984. The isolated strains ofStaphylococcus aureus, Staphylococcus epidermidis, Streptococcus faecalis, Streptococcus faecium and glucose non-fermentative gram-negative rods such asPseudomonas aeruginosa were resistant to third-generation cephem antibiotics. These organisms proved to be widely distributed in hospitals and were frequently isolated from the sputum, excised lung and cardiac blood. The colonization of the sputum by bacteria in respiratory tract infections before, during and after treatment with third-generation cephem antibiotics revealed a tendency for these organisms to appear after treatment. Among the gram-positive cocci,S. faecium was most resistant to these antibiotics, followed byS. faecalis, S. epidermidis andS. aureus in that order. The incidence of resistant isolates in 1984 exceeded that in 1983, suggesting an annual increase in resistant bacteria.
    Type of Medium: Electronic Resource
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