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  • 1985-1989  (5)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5285-5289 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The hot working conditions were examined for Nd-Fe-B die-upset magnets. The Nd14Fe80B6 ternary composition has the best workability (die upsetting) from stress-strain curves for the initial stage of die upsetting at hot working temperature. The compression ratio defined as the inverse of reduction in height should be larger than 4 to have materials aligned. Alignment of c axis along the compressive stress direction is obtained, but grain coarsening occurs during die upsetting. Of several additional elements investigated, Ga is the best for enhancing the coercivity with a little sacrifice of remanence and no deterioration in hot workability. Typical magnetic properties for Nd14Fe79.25B6Ga0.75 die-upset magnets are Br =12.4 kG, iHc =19 kOe, and (BH)max =36 MGOe. The irreversible loss after exposure up to 160 °C is under 10% (Pc =2). The iHc of powder made by crushing the die-upset magnets is nearly independent of particle size. Decrease in iHc by pulverizing to several hundred micron is about 2 kOe. Anisotropic bonded magnets were developed using this powder. Best energy products of injection and compression molded magnets with Ga addition are 10 and 15 MGOe, respectively. The irreversible losses after exposure up to 120 °C is lower than 5% (Pc =2), which is enough thermal stability for polymer-bonded magnets.
    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 64 (1988), S. 4853-4859 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The kinetics of reversible resistivity changes during structural relaxation in various Co-Fe based metallic glasses was examined using a nonlinear kinetic form Ψ=exp[−(t/τm)n]. It was found that the data excellently fit the nonlinear kinetic form. The compositional dependence of the kinetic parameters (distribution parameter n, activation energy Ea, and preexponential factor τ0) were obtained, and the microscopic mechanism of atomic rearrangements during the relaxation is discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1437-1439 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Interdiffusion and interfacial reaction between a sputter-deposited YBa2Cu3Ox thin film and substrates (MgO, sapphire, quartz, and Si) have been investigated by 2.7 MeV 4He+ Rutherford backscattering spectrometry. The diffusivities of Cu in the substrates and of the substrate elements (Mg, Al, and Si) in the Y-Ba-Cu-O thin films have been determined over the annealing temperature range from 876 to 1226 K in an oxygen atmosphere. Among three metallic elements of Y, Ba, and Cu, Cu diffuses the fastest into the substrates. Copper silicide is observed in the interfacial region between the film and the Si substrate. Among these substrates, MgO is suggested to be the most stable on annealing.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 106 (1987), S. 276-280 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The Pavlik harness was applied to a group of outpatients to treat CDH (group I), to a group of hospitalized patients (group 11), and to a third group who received additional treatment to prevent avascular necrosis of the femoral head, based on the theory that the weight of the lower extremity plays an important role in the successful reduction by the Pavlik harness (group III). The results of the three groups were carefully compared in order to determine the ideal management of infants after application of the harness. No difference was found in the therapeutic results between group I and group III, when the reduction was attempted on the outpatient basis. However, the rates of reduction and anatomical healing were lower in the hospitalized patients of group III than in group 11 patients, but there was no difference in the incidence of avascular necrosis of the femoral head between the two groups. In the treatment of CDH using the Pavlik harness, application of the harness on the outpatient basis should be the first choice. It is fundamental to let the weight of the lower extremity help in effecting abduction of the hip joint, but the general and local reactions of the infant must be watched constantly, because too much pressure on the hip joint could invite avascular necrosis of the femoral head. If reduction at the outpatient clinic fails, the patient should be regarded as having the treatment-resistant type of CDH, and should be treated further with traction of the lower extremity, muscle release, and adjustment of the hip joint angle.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An expression plasmid, ptac-C, was constructed by inserting the cDNA of the coding region of the Sendai virus nonstructural C protein downstream of the tac promoter ofE. coli expression plasmid ptac12-Bam. A new protein produced inE. coli after induction was purified to near homogeneity. The purified protein was found to be identical with the C protein predicted from the C gene cDNA in molecular weight, isoelectric point, amino acid composition, and the amino acid sequence at the N-terminal of the protein as well as those of several fragments obtained on V8 protease digestion. Antiserum raised against the purified protein specifically reacted with the C protein in infected cells. Using this antiserum, the localization of the C protein in infected cells was examined by immunofluorescence, which revealed that it appeared in the cytoplasm but not in nuclei.
    Type of Medium: Electronic Resource
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