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  • 1
    Electronic Resource
    Electronic Resource
    Reduction of noise from external sources for floppy disk heads : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5420-5422 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel measurement technique and an analytical model for the determination of externally induced noise in floppy disk heads have been developed. Floppy disk heads are generally susceptible to magnetic fields from, among other things, machinery and CRTs. When an alternating magnetic field is applied to a floppy disk head, a magnetic flux will penetrate into the head, inducing a noise voltage in its coil. Since the floppy disk head has a complex geometry, the magnetic-flux distribution in the head is complicated. The distribution has been studied by a three-dimensional finite-element analysis and effective methods for reducing the noise voltage have been found. New heads have been fabricated according to the analysis results and a noise voltage reduced by 50% has been obtained. The measured noise voltages agree well with the calculated values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347997
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  • 2
    Electronic Resource
    Electronic Resource
    A molecular beam study of alkali promotion of NO sticking on Si(100): Local promotion in a single collision regime (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 3781-3793 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Alkali–metal (K and Cs) promotion for sticking of nitrogen oxide molecule (NO) on Si(100) has been studied using a molecular beam method combined with an Auger electron spectroscopy (AES) and a laser ionization spectroscopy [resonance enhanced multiphoton ionization (REMPI)]. The observed sticking probability S shows a good correlation with alkali coverage, indicating that the alkali promotion is local in nature. The decay of S as a function of NO dose as observed with AES shows an anticorrelation with the evolution of the direct-inelastic scattering intensity as obtained with REMPI. This fact is understood as follows: since the direct-inelastic scattering occurs mostly in a single collision process with the surface, local alkali promotion is realized in a single collision of the incident NO molecule with the alkali–metal adsorbates. The decay of S as a function of NO dose is then analyzed with a reaction cross section. The evaluated reaction cross sections are close to the area of the 2×1 unit cell, and thus the estimated reaction radii are almost equal to but somewhat larger than the covalent radius of a K atom, with a increasing trend with alkali coverage. The alkali promotion is explained in terms of local electron charge transfer from the nonionized alkali adatoms to the affinity level of NO molecules based on the adatom density of state around EF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462959
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  • 3
    Electronic Resource
    Electronic Resource
    Epitaxial growth of CeO2 layers on silicon (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 1332-1333 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CeO2 layer was epitaxially grown for the first time on both (111) and (100) silicon substrates by vacuum evaporation. Characterization using Rutherford backscattering and reflection high-energy electron diffraction proved that a CeO2 layer on (111) Si has considerably good crystalline quality, whereas that on (100)Si contains a large amount of crystallographic defects, especially in the vicinity of the CeO2/Si interface. Auger electron spectroscopy analysis showed a uniform concentration distribution of Ce and O throughout the epitaxial layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103202
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  • 4
    Electronic Resource
    Electronic Resource
    A computer simulation study on electron multiplication of parallel-plate electron multipliers (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 436-445 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Electron multiplication of parallel-plate electron multipliers with a parallel electric field (PPEM-parallel) and with a tilted electric field (PPEM-tilt) have been studied by a Monte Carlo simulation method. The optimum geometrical condition is represented with a ratio of the dynode length Ld to the dynode spacing Ds, Ld/Ds=0.040Vd, for the PPEM-parallel, and with a ratio of the dynode displacement Xd to the dynode spacing Ds, Xd/Ds=0.40, for the PPEM-tilt, where Vd is an applied voltage. For optimum geometrical conditions, the PPEM-parallel and the PPEM-tilt have almost equal characteristic properties of operation such as mean gain, pulse height distribution, and transit time distribution of secondary electrons. These are inherent results of the almost equivalent electron multiplication processes such as collision energy of secondaries and number of electron multiplication steps. A simplified analytical method is used to explain the computer simulation results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144213
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  • 5
    Electronic Resource
    Electronic Resource
    Pressure-Controlled Selective Isomer Formation of Fullerene C78 (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 3090-3091 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100063a008
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  • 6
    Electronic Resource
    Electronic Resource
    Haemopoietic growth factors induce human basophil migration in vitro (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 22 (1992), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Accumulation of basophils in inflammatory sites is an important aspect of the late-phase allergic reaction involving skin and upper and lower airways, suggesting the existence of mechanisms for basophil migration. Because haemopoietic growth factors have been shown to stimulate various functions of human basophils, we tested the ability of haemopoietic growth factors to migrate basophils in vitro. Both IL-3 and granulocyte-macrophage colony-stimulating factor (GM-CSF) induced migration of purified normal basophils (purity c. 80%) in a dose-dependent fashion at picomolar concentrations, while granulocyte (G)-CSF, macrophage (M)-CSF, and IL-4 had no effect at all. Chequerboard analyses indicate that migratory activity of both factors are chemokinetic. These results suggest that local production of both factors during allergic reactions might potentially play an initial role in the recruitment of basophils from the circulation to sites of inflammatory reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1992.tb03099.x
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  • 7
    Electronic Resource
    Electronic Resource
    Cefotiam-induced IgE-mediated occupational contact anaphylaxis of nurses; case reports, RAST analysis, and a review of the literature (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 24 (1994), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cefotiam (CTM) is one of the most popular cephem antibiotics in Japan. Recently we experienced two cases of nurses with CTM-induced contact anaphylaxis. When they were preparing drip infusions of antibiotics or working around other nurses doing so, they suddenly fell into shock with other symptoms such as flushing, urtiearia, abdominal distress, vomiting, dyspnoea and or loss of consciousness. The symptoms never occurred after they avoided exposure to CTM. Passive cutaneous or open patch tests were positive for CTM. Histamine release was induced by CTM from washed leucocytes. RAST analysis using CTM-human serum albumin-coupled dises showed high % RAST count, suggesting that these reactions were mediated by IgE antibodies. A RAST inhibition test suggested that the methyl-thiotetrazol side-chain was the main antigenic determinant. Both patients had hand dermatitis that had appeared preceding the episodes of anaphylaxis. Although the dermatitis had been resistant to treatments, it also disappeared after they avoided exposure to CTM, It seemed likely that it was also induced or exacerbated by CTM and facilitated the penetration of CTM to cause anaphylaxis. The literature is also reviewed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1994.tb00208.x
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  • 8
    Electronic Resource
    Electronic Resource
    Enhancement of basophil histamine release by a human basophil-like cell promoting activity (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 45 (1990), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A basophil-like cell promoting activity (BaPA) is a lymphokine which has the ability to proliferate metachromatically staining cells in human bone marrow. We studied the effect of BaPA on histamine release from human peripheral basophils. BaPA did not directly induce histamine release from basophils. However BaPA ranging from 0.001 to 0.5 U/ml enhanced histamine release from basophils stimulated with anti-IgE, calcium ionophore A23187 or FMLP in a dose-dependent manner. On the basis of recent observations that in addition to their capacity for proliferating progenitor cells, colony-stimulating factors are capable of regulating functions of end-stage cells of the same lineage, this finding that BaPA is able to modulate a basophil function raises the possibility that BaPA also regulates progenitors of basophils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1990.tb00481.x
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  • 9
    Electronic Resource
    Electronic Resource
    Evidence for relatedness of Japanese isolates of birnaviruses from marine fish to IPNV (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 17 (1994), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1994.tb00239.x
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  • 10
    Electronic Resource
    Electronic Resource
    Refined crystal structure of pseudoazurin from Methylobacterium extorquens AM1 at 1.5 Å resolution (1994)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 50 (1994), S. 317-328 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The crystal structure of pseudoazurin from Methylobacterium extorquens AM1 (PAZAM1) has been solved by the molecular replacement method using copper–copper distances as translation parameters, which were obtained from difference Patterson maps calculated with the synchrotron radiation data containing the multiwavelength anomalous-dispersion effect. The structure refinement was carried out by the use of molecular dynamics optimization and the restrained least-squares method. The final crystallographic R factor was 19.9% for the 14 365 reflections greater than 3σ between 1.5 and 8.0 Å resolution. This report describes the characteristic features of the structure of PAZAM 1 as well as the effectiveness of synchrotron radiation for structure analysis of metalloproteins. The environment of the metal active site and the structural differences among blue-copper proteins are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444994000260
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