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  • Electronic Resource  (8)
  • 1990-1994  (8)
  • 1992  (3)
  • 1991  (5)
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  • Electronic Resource  (8)
Years
  • 1990-1994  (8)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Magnetic properties of fine crystalline Fe–P–C–Cu–X alloys : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6241-6243 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The crystallization process and magnetic properties of Fe–P–C–Cu–Ge–Si amorphous alloys were investigated. After annealing above the crystallization temperature, the bcc Fe particles, with nanoscale grain size, precipitated in the amorphous alloy for a wide P concentration range. The volume ratio of the bcc Fe phase to amorphous was about 30%. The mixed phase of these alloys shows a drastic decrease of coercive force (Hc) and particle diameter (d) as P concentration increases. The lowest Hc was obtained for Fe78P16C2Cu0.5Ge3Si0.5, and Hc and d were 1.8 A/m and 16 nm, respectively. Observation by in situ Lorentz scanning electron microscopy (SEM) revealed that the width of magnetic domains were 0.01 or 0.1 mm and the domain walls with smaller bcc Fe particles moved in a weaker magnetic field than those with larger ones. So the low Hc is attributed to the decrease of magnetocrystalline anisotropy caused by fine structures. The core loss of fine crystalline Fe–P–C–Cu–Si–Mo alloy, W14/50, was 0.22 W/kg after annealing under a magnetic field of 2.4 kA/m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350008
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Supermodulus effect in a Au/Ni superlattice studied by a diamond anvil cell and SR x ray : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1035-1038 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Elastic and thermal properties of Au/Ni superlattices have been investigated by x-ray diffraction on a synchrotron radiation source at the Photon Factory. An elastic response of [Au(10 A(ring))/Ni(10 A(ring))]50 to hydrostatic pressure generated by a diamond anvil cell has been measured in the layer-stacking direction. Its compressibility obtained from the pressure dependence of its superlattice period (Λ vs P) shows an anomalously small value compared with either bulk Au or Ni metal. Linear thermal expansions has also been measured by a similar method (Λ vs T). A significant anisotropic behavior between the layer-stacking and in-plane direction was found in both [Au(10 A(ring))/Ni(10 A(ring))]50 and [Au(4 A(ring))/Ni(4 A(ring))]210.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143192
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Extremely-low-threshold and high-temperature operation in a photopumped ZnSe/ZnSSe blue laser (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 1401-1403 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A ZnSe/ZnSSe blue semiconductor laser was demonstrated to show very low threshold by direct photopumping of the ZnSe active layer. The lowest threshold at the excitation wavelength of 445 nm was 10 kW/cm2 at 300 K which is equivalent to the current density of 3.6 kA/cm2. This is the lowest threshold ever reported in II-VI photopumped lasers and is approaching the theoretically calculated threshold. The characteristic temperature of the threshold, which characterizes the temperature dependence of the threshold in the exponential form, was 124 K up to the measured 400 K and was comparable to III-V double-heterostructure lasers. The differential quantum efficiency remained the similar level up to 400 K and its decrease observed at 400 K was within 23% of the efficiency at 300 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105319
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  • 4
    Electronic Resource
    Electronic Resource
    Application of an imaging plate to high-pressure x-ray study with a diamond anvil cell (invited) : Proceedings of the 4th International Conference on Synchrotron Radiation Instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 967-973 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In order to obtain reliable data on d values and integrated intensities, an imaging plate (IP) has been applied to high-pressure diffraction experiments with a diamond anvil cell using synchrotron radiation. The IP was found to be more effective than a conventional x-ray film by a factor of 30, and more effective than an energy dispersive method by several times. In order to integrate the intensity data on the IP, a histogram method was successfully developed. This combination proved to give a lattice constant with relative accuracy of 2×10−4, and observed integrated intensities which excellently agree with calculated ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143793
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  • 5
    Electronic Resource
    Electronic Resource
    Acoustic emission monitoring during partial compression to detect early stages of decay (1992)
    Springer
    Wood science and technology 26 (1992), S. 279-287 
    Details
    ISSN: 1432-5225
    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
    Notes: Summary The acoustic emissions (AEs) under partially compression were monitored with two softwood and one hardwood specimens in very eary stages of decay by a brown- and a white-rot fungus. Even slightly decayed specimens emitted AEs immediately after beginning of loading, typically when partial compression stress was applied to brown-rotted wood with the flat-headed attachment. With sound specimens of three wood species, only a few AEs were generated until the load reached at the proportional limit. These results suggest that AE monitoring will be one of the feasible means to detect the incipient stages of decay in a field test.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00200163
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  • 6
    Electronic Resource
    Electronic Resource
    Reordering in the β-Phase of Cu-Zn-Al Shape Memory Alloys (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 56-58 (Jan. 1991), p. 481-485 
    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/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.56-58.481.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    A new mouse model for autoimmune orchitis (1991)
    Springer
    Medical microbiology and immunology 180 (1991), S. 1-14 
    Details
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Experimental autoimmune orchitis (EAO) was induced in SMA mice (H-2nondefined) by repeated injection at intervals of 30 days of syngeneic testis homogenate (TH) together with Klebsiella O3 lipopolysaccharide (KO3 LPS) as a potent adjuvant. EAO was not induced by repeated injection of TH alone or KO3 LPS alone. At 10 days after the secondary injection of TH + KO3 LPS, there was marked infiltration with neutrophils in the seminiferous tubules and in the interstitium of the testis accompanied by destruction of the architecture of the seminiferous tubules and hypospermatogenesis. At 20 days after the secondary injection, infiltration with neutrophils in these areas had been replaced mostly by mononuclear cells (lymphocytes, plasma cells, and macrophages). Histopathological changes of the testes became severer by further injections until the 10th injection. The EAO lesions in the terminal stage were characterized by complete destruction of the tubular architecture of the testis, fibrosis, and aspermatogenesis. Lesions in the terminal stage were not restored at all. Spermagglutinating antibody titers in the serum increased and delayed-type hypersensitivity against TH estimated by footpad swelling developed in mice injected repeatedly with TH + KO3 LPS. Using immunofluorescence, antibodies against acrosomal components and tail components of the spermatozoa were detected in serum of these mice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191695
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  • 8
    Electronic Resource
    Electronic Resource
    Heat capacity and pressure at phase separation and solidification of3He in hcp4He (1991)
    Springer
    Journal of low temperature physics 84 (1991), S. 133-156 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured heat capacity and pressure of 0.45% and 0.9%3He-4He mixtures at pressures between 25 bar and 33 bar and temperatures between 20 mK and 250 mK. The data show the latent heats and the pressure changes associated with the phase separation (or remixing) and with the liquification (or solidification) of the resulting droplets in the hcp matrix. Above about 31 bar, the phase separation and the liquid-solid phase transition are separately observable. From these data, as well as from the heat capacity of the liquid droplets, we conclude that the droplets are filled with almost pure3He showing bulk behavior and that only a part of the separated3He is liquified. The amount of the liquid depends on the history of the sample. The phase separation is reproducible and lasted for many hours. In the pressure range of the hcp-L1-L2 univariant the sample moves along the univariant for a limited temperature range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00681620
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