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  • Electronic Resource  (10)
  • 1990-1994  (6)
  • 1985-1989  (3)
  • 1965-1969  (1)
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  • Electronic Resource  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    A novel phased array acousto-optic Bragg cell (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 3732-3734 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Asymmetry introduced to an otherwise planar phased array Bragg cell transducer design results in the elimination of one of two steering acoustic wave fronts. Therefore, all of the acoustic power is applied to the acousto-optic interaction process. In addition, a factor of 1.8 improvement in wide-band acousto-optic Bragg cell interaction efficiency is realized over the planar phased array design. The technique to establish the asymmetry was to use a periodic silver film as a quarter-wave step. This new technique is particularly suitable for the construction of wideband Bragg cells at microwave frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337583
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  • 2
    Electronic Resource
    Electronic Resource
    Development of a controlled spray generator (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1291-1296 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A multiorifice spray generator with two different modes of operation is developed. The impulse jet operation mode covers a wide range of droplet frequencies and produces arrays of droplets with controllable spacing, but with a wide size spectrum. This ejector also operates in pressurized flow mode. In this mode, optimum disturbance frequency breaks up the liquid jets into uniform size droplets, resulting in a monosized spray. Precise control of fuel flow rate and droplet size is achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139456
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High misfit epitaxial growth: Superconducting YBa2Cu3O7−x thin films on (100)BaF2 substrates (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 1509-1511 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In situ epitaxial growth of YBa2Cu3O7−x superconducting thin films on (100)BaF2 substrates has been successful by an off-axis dc planar magnetron sputtering method. The zero-resistance temperatures of these thin films are about 81–84 K with transition width of 1.5 K. The characteristics of the films were examined by x-ray diffraction, reflection high energy electron diffraction, Rutherford backscattering spectroscopy ion channeling techniques, and scanning electron microscopy. The experimental results suggest that BaF2 is a promising material as substrates or buffer layers for the epitaxial growth of high Tc superconducting thin films, especially in high frequency applications. Discussions on the heteroepitaxy of the YBCO/BaF2 system are propounded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106295
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  • 4
    Electronic Resource
    Electronic Resource
    A flexible/polarizable simple point charge water model (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 6211-6217 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100169a031
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  • 5
    Electronic Resource
    Electronic Resource
    Water structure affected by a weak base (1990)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 112 (1990), S. 5698-5700 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00171a003
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  • 6
    Electronic Resource
    Electronic Resource
    Anodic Oxidation of Carbohydrates and their Derivatives in Neutral Saline Solution (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 921-922 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The work reported here is a continuation of studies2 on the anodic oxidation of glucose and related carbohydrates at platinized electrodes, with the object of obtaining small amounts of usable power to drive the blocking oscillator circuit of a cardiac pacemaker. The ultimate form of such a fuel ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/224921a0
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  • 7
    Electronic Resource
    Electronic Resource
    Solid electrolyte carbon dioxide sensor using sodium ionic conductor and lithium carbonate-based auxiliary phase (1993)
    Springer
    Applied physics 57 (1993), S. 25-29 
    Details
    ISSN: 1432-0630
    Keywords: 82.80 ; 85.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A solid electrolyte CO2 sensor using a sodium ionic conductor and a lithium carbonate-based auxiliary phase was investigated. The sensor responded excellently to CO2 in the temperature range of 350–600° C, without being affected by coexistent water vapor. The EMF responses to varying partial pressures of CO2 (P CO 2) followed a 2-electron reaction of CO2 under fixed P O 2. Under fixed P CO 2 (2×10−3 atm), the EMF was found to be almost independent of P O 2 at temperatures above 450° C, while it depended on P O 2 following a 2-electron reaction of O2 at 305° C and below. Two alternative sensing electrode reactions were proposed to take place depending on the working temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331212
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  • 8
    Electronic Resource
    Electronic Resource
    Heterogeneity among heat-labile enterotoxins produced by porcine enterotoxigenic Escherichia coli (1992)
    Springer
    European journal of epidemiology 8 (1992), S. 543-547 
    Details
    ISSN: 1573-7284
    Keywords: Heat-labile enterotoxins (LT) ; A and B subunits ; pI value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The heat-labile enterotoxins (LT) produced by various porcine strains (LTp) of enterotoxigenic Escherichia coli were purified to homogeneity and their molecular properties were compared with each other. By double gel diffusion and rabbit skin permeability test, LTps from WT-1 (LTp-WT-1) and BO-149 (LTp-BO-149) strains were antigenically and biologically identical. By polyacrylamide gel electrophoresis with sodium dodecyl sulfate (SDS), the mobilities of A and B subunits of LTp (BO-149) were identical to those of LTp (WT-1). However, on polyacrylamide gel electrophoresis without SDS, LTp (BO-149) and LTp (WT-1) differed in mobility, suggesting their molecular differences. Though the pI value of the B subunit of LTp (BO-149) was identical to that of LTp (WT-1), the pI value of the A subunit of LTp (BO-149) was higher than that of LTp (WT-1). These data suggest that there is molecular heterogeneity among LTps produced by the two porcine enterotoxigenic Escherichia coli strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146374
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  • 9
    Electronic Resource
    Electronic Resource
    A mechanistic model for two-phase annular-mist flow in vertical pipes (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 1008-1012 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The physical phenomena associated with two-phase annular-mist flow in vertical pipes are considered. A new mechanistic model is developed to predict liquid entrainment, liquid film thickness, in situ velocities, and pressure drop. The model is compared to field data and found to be superior to the three commonly used empirical correlations.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330613
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  • 10
    Electronic Resource
    Electronic Resource
    Comparison of amperometric and UV-spectrophotometric monitoring in the HPLC analysis of pesticides (1991)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 339 (1991), S. 207-211 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Studies have been carried out to compare different detection techniques including amperometric detection in the reductive and oxidative mode and UV detection following the HPLC separation of pesticides. By the example of 4,6-dinitro-o-cresol (DNOC), 2-sec-butyl-4,6-dinitrophenol (Dinoseb) and 2-tert-butyl-4,6-dinitrophenol (Dinoterb), it is shown that the electrochemical detection exhibits higher sensitivities than the UV-technique. The detection limits are in case of the oxidative amperometric technique 0.1 ng for all pesticides, in the reductive mode 0.3 ng for DNOC and 1 ng for Dinoseb and Dinoterb. By UV-monitoring the detection limits were found to be 2 ng for DNOC and 24 ng for Dinoseb and Dinoterb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325738
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