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  • Electronic Resource  (13)
  • 2000-2004  (3)
  • 1990-1994  (7)
  • 1985-1989  (3)
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  • Electronic Resource  (13)
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  • 1
    Electronic Resource
    Electronic Resource
    Hot workability of R-Fe-B alloys and their magnetic properties : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5829-5831 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The hot workability of R-Fe-B alloys and their magnetic properties were extensively investigated. Modified hot pressing employing a ring which constrains an alloy ingot enabled hot working without cracking at high strain rates up to ε(overdot) = 1 × 10−1/s. Excessive discharging of the liquid R-rich phase was controlled and the refinement of crystal grains occurred at high strain rate hot pressing. Through these effects the maximum Hci reached 18 kOe, and a (BH)max of 33.3 MGOe with a moderate Hci of 15 kOe was obtained in a composition of the Pr-Fe-B-Cu system. Post-heat treatment at 475–525 °C was effective for enhancing Hci. It was found that even in Nd-based alloys, a (BH)max of more than 30 MGOe was achieved by hot pressing at a high strain rate, because the change in composition during pressing is minimized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347863
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  • 2
    Electronic Resource
    Electronic Resource
    High precision polarimeter system for atomic polarization and tilted-foil experiments with 1.7 keV/amu 14N+ beam (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 2045-2049 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A high precision atomic polarimeter system for the use in beam-foil spectroscopy experiments with a few keV/amu heavy-ion beams has been developed. The polarimeter measures the circular polarization of fluorescences from the beam ion in-flight after the beam–foil interaction. The present system has two identical such polarimeters in both sides of the beam axis to reduce the systematic errors such due to the fluctuations of beam current, background and so on. A successful use of an ultrathin carbon foil (1.5 μg/cm2), which was durable for several hours against a few hundred nA beam irradiation, enabled the beam–foil experiments with such low energy heavy-ion beams. A performance test of the polarimeter system was carried out in the tilted foil experiments with a 1.7 keV/amu 14N+ beam. The atomic polarization was observed for the transition 1s22s22p3p 1D→1s22s22p3p 1P, whose fluorescence wavelength is 399.5 nm, in the N+ ion (N II). The polarization was approximately −2% for the tilt angle of −40° and showed monotone increasing with increasing tilt angle up to +2% for +40°. The polarization at 0° was (0.002±0.25)%, which is highly consistent with the expected polarization of 0%. This result indicates the high reliability of the present polarimeter system. This is the first tilted-foil experiment at such low beam energy. The present experimental technique will be very useful for studies of the polarization mechanism of the beam–foil interaction. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150576
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  • 3
    Electronic Resource
    Electronic Resource
    Mechanical properties of hot-rolled Pr-Fe-B-Cu magnets : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6631-6633 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mechanical strength and properties of thin plates were investigated for hot-rolled Pr-Fe-B-Cu magnets. Tensile strengths of the hot-rolled magnets were more than 23.7 kg f/mm2. Bending tests were also applied and the strength of 37.7 kg f/mm2 was obtained. The strengths obtained are definitely higher than that of commercial Nd-based sintered magnets. It was found that the mechanical strengths were enhanced by Pr2Fe14B grain refinement caused by Cu addition. Related to high mechanical strength, hot-rolled Pr-Fe-B-Cu magnets show excellent machinability. Thin plate magnets up to 0.1 mm in thickness with fairly large surface area were produced without any cracking. Moderate energy products better than 20 MGOe were achieved by heat treatment after machining.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356877
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  • 4
    Electronic Resource
    Electronic Resource
    High-energy cast Pr-Fe-B magnets (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5290-5292 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new process has been developed to produce high-energy bulk Pr-Fe-B magnets directly from the melt without the handling of magnetic powder or powderlike ribbons. The process mainly consists of only three steps—casting/hot pressing/annealing—and minimizes the oxygen contamination of magnets. A typical composition of cast alloy is Pr17 Fe76.5 B5 Cu1.5 . Using this type of alloy, a magnetic alignment is easily introduced by hot pressing. Copper plays two important roles: high coercivity and excellent magnetic alignment are achieved simultaneously by the addition of copper. Magnetic properties of hot-pressed Pr17 Fe76.5 B5 Cu1.5 magnets are as follows: Br=12.5 kG, i Hc =10.0 kOe, and (BH)max =36.2 MGOe. The cast alloy of this composition also has an i Hc of 7.4 kOe and a (BH)max of 8.8 MGOe after annealing at 1000 °C for 24 h. The steep rise in the initial magnetization curve indicates a type of nucleation-controlled coercivity mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342395
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  • 5
    Electronic Resource
    Electronic Resource
    Bronchial hyperresponsiveness and airway inflammation in adolescents with asymptomatic childhood asthma (2003)
    Oxford, UK : Munksgaard International Publishers
    Allergy 58 (2003), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background:  About 70% of childhood asthmatics become free of asthma-related symptoms during adolescence. Little is known about bronchial hyperresponsiveness (BHR) and airway inflammation in young adults with “outgrown” childhood asthma.Methods:  We studied 61 nonsmoking medical students (18 intermittent mild asthmatics, 23 students with outgrown childhood asthma but free of asthma-related symptoms for 10 years (asymptomatic asthmatics) and 20 healthy students). BHR and lung function were measured, and induced sputum samples analyzed for eosinophil count, eosinophilic cationic protein (ECP), granulocyte-macrophage colony stimulating factor (GM-CSF), and tumor necrosis factor-α (TNF-α).Results:  BHR was still present in most asymptomatic asthmatics, but it was milder compared with healthy students. Only three subjects with previous asthma had no BHR and no signs of airway inflammation. Percentages of eosinophil, and ECP, TNF-α and GM-CSF concentrations in induced sputum of mild asthmatics and asymptomatic asthma groups were higher than in the healthy group. In asymptomatic asthmatics group, the duration of asthma, sputum eosinophil percentage, and the level of TNF-α in sputum correlated significantly with BHR.Conclusions:  Only a few subjects with longstanding asymptomatic asthma could be considered as cured; most asymptomatic asthmatics continued to exhibit BHR and signs of airway inflammation. The outcome of childhood asthma and BHR was associated with the degree of airway inflammation and the duration of childhood asthma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1398-9995.2003.00053.x
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  • 6
    Electronic Resource
    Electronic Resource
    Pranlukast, a cysteinyl leukotriene receptor 1 antagonist, attenuates allergen-specific tumour necrosis factor alpha production and nuclear factor kappa B nuclear translocation in peripheral blood monocytes from atopic asthmatics (2003)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 33 (2003), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background The cysteinyl leukotriene receptor 1 (cysLTR1) antagonists are useful for oral treatment of bronchial asthma. The underlying mechanism of cysLTR1 antagonists on inhibition of inflammatory cytokine production is yet to be determined.Objective The present study was designed to determine the effect of pranlukast, a cysLTR1 antagonist, on production of inflammatory cytokines by allergen-stimulated peripheral blood monocytes (PBM) from atopic asthmatics.Methods PBM were obtained from normal control (n = 10) and Dermatophagoides farinae (Der f) allergen-sensitized atopic asthmatics (n = 12), and were cultured in the presence of Der f allergen. The production of TNF-α and nuclear-translocation of nuclear factor kappa B (NF-κB) was determined. In atopic asthmatics, pranlukast, tacrolimus or dexamethasone was added before stimulation by Der f. The additive effect of pranlukast and dexamethasone was also determined.Results PBM from atopic asthmatics cultured with Der f exhibited a significant increase in TNF-α production and nuclear translocation of NF-κB compared with normal control (P 〈 0.01). Pranlukast, tacrolimus and dexamethasone significantly inhibited production of TNF-α and nuclear-translocation of NF-κB in PBM of atopic asthmatics (P 〈 0.01). An additive effect of pranlukast on low-dose dexamethasone was also demonstrated. However, LTD4 did not induce TNF-α production or NF-κB nuclear translocation.Conclusion Our results suggest that pranlukast may inhibit TNF-α production via suppression of NF-κB activation through pathways distinct from cysLTR1 antagonism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2222.2003.01656.x
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  • 7
    Electronic Resource
    Electronic Resource
    High resolution study of24Mg(p, d)23Mg for the Ne-E problem (1994)
    Springer
    The European physical journal 348 (1994), S. 59-60 
    Details
    ISSN: 1434-601X
    Keywords: 27.30.+t ; 97.10.Cv ; 97.10.Tk ; 97.30.Qt ; 98.58.Ca
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nuclear levels of23Mg near and above the proton threshold were investigated with high resolution. A new level has been identified at 7.643 MeV (66 keV above the proton threshold) with a possible Jπ=(3/2, 5/2)+. Some other spin-parity and excitation-energy assignments are also made. These results enable the reaction rate estimate of22Na(p,γ)23Mg with much smaller uncertainties, which is critical for the Ne-E problem in nuclear astrophysics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291654
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  • 8
    Electronic Resource
    Electronic Resource
    Carcinoid tumor of the bile duct: Case report (1989)
    Springer
    Abdominal imaging 14 (1989), S. 151-154 
    Details
    ISSN: 1432-0509
    Keywords: Carcinoid tumor ; Bile duct ; Bile duct tumor ; Carcinoma, endocrine ; Carcinoma, bile duct
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Carcinoid tumor of the bile duct is extremely rare. Ten cases have been reported in the literature. This report describes the eleventh case. A 55-year-old woman was hospitalized with biliary stenosis. Sonography (US) and computed tomography (CT) demonstrated a tumor in the upper common hepatic duct (CHD). Percutaneous transhepatic cholangiography showed extraluminal growth of the tumor. The tumor was resected and histologic examination showed carcinoid tumor of the common hepatic duct.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01889181
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  • 9
    Electronic Resource
    Electronic Resource
    Spin-oriented projectile fragments: The first application tog-factor measurements (1992)
    Springer
    Hyperfine interactions 75 (1992), S. 101-108 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ejectile nuclei in the fragmentation of intermediate-energy heavy-ion projectiles were found to be largely spin polarized. The observed polarization as a function of the outgoing momentum was nicely explained by a simple kinematical argument based on the participant-spectator model of projectile fragmentation. The measurements extended to cover several different targets, incident energies, exit channels, and emission angles revealed that substantial polarization shows up widely in projectile fragmentation reactions. Furthermore, this polarization exhibits an interesting behavior which may be interpreted as a manifestation of a gradual change in the deflection angle from positive to negative values as the energy increases and/or the target-Z decreases. The present polarization results also suggests various applications of spin polarized radioactive beams. As the first example of such an application, we present a recent result on theg-factor measurements on neutron-rich nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398968
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  • 10
    Electronic Resource
    Electronic Resource
    Decay properties of the key resonant states in8Li(α, n)11B for primordial nucleosynthesis (1991)
    Springer
    The European physical journal 341 (1991), S. 121-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The particle decay property of the key resonant states in the reaction8Li(α,n)11B for the inhomogeneous big bang models was studied experimentally. The sum of the branching ratios of the 10.572 MeV state for the neutron decays to the excited states in11B is as large as for the ground state, indicating that the neutron decays to excited states are crucial and enhance the reaction rate for heavy element synthesis considerably.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01281284
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