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  • 1
    Electronic Resource
    Electronic Resource
    New measuring system for the distribution of a magnetic force by using an optical fiber (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 243-246 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new measuring system using an optical fiber and a position sensing photodetector was developed to measure a three-dimensional distribution of a magnetic force. A steel ball attached to a cantilever made of an optical fiber generated force in a magnetic field. The displacement of the ball due to the force was detected by a position-sensing photodetector with the capability of detecting two-directional coordinates of the position. By scanning the sensing system in a magnetic field, we obtained distributions of two-directional component of the magnetic force vector. The component represents the gradient of a squared magnetic field. The usefulness of the system for measuring the magnetic field distribution in a narrow clearance and for evaluating superconducting machine components such as magnetic bearings was verified experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144444
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of superconducting characteristics of high Tc materials by the magnetic force sensing system (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1049-1052 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A magnetic force sensing system using a highly sensitive force sensor was developed to measure the two-dimensional distribution of superconducting properties of high Tc materials. A probing tip made of a small piece of magnetized material was mounted on a cantilever scanned over superconducting surfaces. Magnetic properties of the superconductor generated force on the tip and the force was measured by an optical displacement sensor. Two kinds of YBCO superconductor were examined by the measuring system in order to compare their repulsive force and shielding characteristics. Two-dimensional distribution of repulsive force due to the Meissner effect of YBCO, which was fabricated by the melt powder melt growth (MPMG) process, showed evident nonuniformity which is attributed to the nonuniformity of chemical composition of the material. Although the MPMG materials are capable to be used as a magnetic shield, they have much larger residual flux than the materials fabricated by the solid phase reaction process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144176
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  • 3
    Electronic Resource
    Electronic Resource
    Conversion of Metmyoglobin to Bright Red Myoglobin Derivatives by Chromobacterium violaceum, Kurthia sp., and Lactobacillus fermenturn JCM1173 (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 58 (1993), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Lactic: acid bacteria (LAB) and various bacteria isolated from the environment were screened on microbiological media for the ability to convert brown metmyoglobin to more desirable bright red derivatives. Of 1,550 environmental isolates tested, two isolates (Kurthia sp. K-22 and Chromobacterium violaceum K-28) were recovered which consistently converted metmyoglobin to more desirable color derivatives as characterized spectrophotometrically. Strains K-22 and K-28 produced oxymyoglobin and nitric oxide myoglobin, respectively. Of 347 LAB tested, one strain (Lactobacillus fermentum JCM1173) was identified that generated nitric oxide myoglobin. These data indicate certain bacteria can effectively convert metmyoglobin to more red forms, and establish the potential of bacterial systems for preserving or improving rhe color of meat products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1993.tb03205.x
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  • 4
    Electronic Resource
    Electronic Resource
    Measurement of spatial coherence of a copper vapour laser beam using a reversal shear interferometer (1991)
    Springer
    Optical and quantum electronics 23 (1991), S. S477 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We measured the spatial coherernce of a copper vapour laser (CVL) beam with an unstable resonator by the reversal shear interferometer. By this method, we can evaluate the spatial coherence function from a single-shot measurement. The spatial coherence width was 5 mm when an unstable resonator with a magnification factor of 60 was used. Moreover we verified the result by the theoretical calculation on the basis of the passive resonator model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619643
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  • 5
    Electronic Resource
    Electronic Resource
    150 Mbits−1 ch−1 12-channel optical parallel interface using an LED and a PD array (1992)
    Springer
    Optical and quantum electronics 24 (1992), S. S479 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract An optical fibre parallel interface has been developed for card-cage to card-cage and board-to-board interconnections, representing a practical and promising optical interconnection. For a system design of a 12 channel, 150 Mbits−1 ch−1 optical parallel interface over a distance of 100 m, it is shown that the choice of a long wavelength LED/PD array with graded index optical fibre array meets the requirements for both power budget and skew limitation over this transmission distance. A 7 mm thick compact package transmitter and receiver module was developed, employing a Zn-doped, mesa structure, 1.3μm LED array and an isolated InGaAs PD array. An optical parallel transmission experiment over 100 m was successfully demonstrated using these modules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619513
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  • 6
    Electronic Resource
    Electronic Resource
    Structure of (−)-(R)-[2-(aminomethyl)pyrrolidine](1,1-cyclobutanedicarboxylato)-platinum(II) monohydrate (DWA-2114R) (1990)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 137-138 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270189009479
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  • 7
    Electronic Resource
    Electronic Resource
    Inhibition of IgM antibody-mediated aggregation ofTrypanosoma gambiense in the presence of complement (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 1002-1006 
    Details
    ISSN: 1420-9071
    Keywords: Trypanosoma gambiense ; monoclonal IgM antibody ; immune reaction ; dissociation ; immunophagocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract This paper deals with the immune reaction betweenTrypanosoma gambiense and monoclonal IgM mouse antibody at equivalence with or without rabbit complement. Antibody-mediated trypanosome clumps formed in the absence of complement, and were readily dissociated by complement to become free. In the presence of complement, on the other hand,T. gambiense were not aggregated by the antibody. Free parasites adhered readily to cultured peritoneal macrophages. Complement-mediated dissociation of the clumped trypanosomes in the equivalence area released a large number of previously bound surface antigens. These antigens were capable of binding again to fresh IgM antibody. Experimental results further indicated that the complement system caused a functional alteration, changing the multivalent nature of the IgM antibody in the immune complex into a univalent one. This phenomenon is of great advantage to the infected host in clearing pathogens in vivo, as it allows more antibodies to attach to trypanosomes and subsequently initiate complement activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01919153
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  • 8
    Electronic Resource
    Electronic Resource
    Preparations of Ion-Exchanged Beta-Alumina by Employing Molten Salts and those Applications to Thermodynamic Investigations (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 73-75 (Jan. 1991), p. 735-740 
    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/2011/0528/02/21/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.73-75.735.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    The characteristics of spiral waves in an axially rotating pipe (1992)
    Springer
    Experiments in fluids 12 (1992), S. 277-285 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental study of the instability of a flow in an axially rotating pipe is performed by means of LDV and flow visualization technique. It is found that the axial velocity of the rotating pipe flow fluctuates like a sine wave at first, then its fluctuating pattern assumes a somewhat sawtooth wave form as a spiral wave appears, which is predicted by means of linear and nonlinear stability analysis. At a certain rotation rate, the amplitude of the velocity fluctuations amounts to 30% of the axial velocity. At the down-stream section, another fluctuating component appears in the velocity, which interferes with the initially appearing component, then the fluctuation becomes one with broad-band spectral components. There is a close analogy between this spectral evolution and that of a Taylor-Couette flow. Deformation of the velocity distribution is obtained from the velocity fluctuating pattern and its phase, and the structure of the spiral wave is considered. The strength, azimuthal wavenumber and angular velocity of the spiral wave obtained from the velocity data are confirmed by flow visualization. The change of pressure loss in the rotating pipe is compared with the case without rotation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00187306
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  • 10
    Electronic Resource
    Electronic Resource
    Diffusion-preventive Al2O3 layer growth at the interface of plasma-sprayed niobium and FeCrAlY in a tungsten fibre-reinforced high-temperature superalloy composite (1991)
    Springer
    Journal of materials science 26 (1991), S. 6809-6816 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The growth mechanism of a diffusion-preventive layer formed at elevated temperatures (∼1500 K) between the plasma-sprayed niobium layer and the plasma-sprayed FeCrAlY matrix in a tungsten fibre-reinforced high-temperature superalloy composite (Nb-coated W fibre/FeCrAlY composite) was studied. The diffusion-preventive layer was identified as α-Al2O3 by scanning electron microscopy/electron probe microanalysis, energy dispersive X-ray spectrometry analysis, and X-ray diffraction. Heat-treatment experiments were implemented systematically and it was found that the Al2O3 layer was also formed at the plasma-sprayed Nb/rolled FeCrAl interface. No Al2O3 layer, however, was formed either at the rolled Nb/plasma-sprayed FeCrAlY interface or at the rolled Nb/rolled FeCrAl interface. In these cases, an intermetallic compound layer was formed instead. A growth mechanism is proposed in which the Al2O3 is attributed to a chemical reaction between the residual oxygen in the plasma-sprayed niobium and aluminium in FeCrAlY or FeCrAl. The magnitude of the driving force was evaluated by a new model based on thermodyanamics. Numerical calculations have shown that the proposed growth mechanism is thermodynamically reasonable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02402677
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