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  • 1
    Electronic Resource
    Electronic Resource
    Early detection of air embolism (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 38 (1983), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1983.tb12215.x
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  • 2
    Electronic Resource
    Electronic Resource
    Thermoluminescence dosimetry of rare-earth doped tellurite phosphate glasses
    Amsterdam : Elsevier
    Materials Chemistry & Physics 36 (1994), S. 365-370 
    Details
    ISSN: 0254-0584
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0254-0584(94)90056-6
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  • 3
    Electronic Resource
    Electronic Resource
    Inhibition of diffusion controlled corrosion in pipelines by drag reducing polymers under turbulent flow conditions (1984)
    Springer
    Journal of applied electrochemistry 14 (1984), S. 75-78 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The effect of adding carboxymethylcellulose drag reducing polymer on the rate of corrosion of aluminium tube through which sodium hydroxide solution flows, was studied by a weight loss technique. The variables studied were solution flow rate and polymer concentration. Reynolds number and polymer concentration were varied over the range 3500 to 30 000 and 10 to 500 ppm, respectively. Polymer addition was found to decrease the rate of corrosion by a maximum of 63% depending on polymer concentration and Reynolds number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00611260
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  • 4
    Electronic Resource
    Electronic Resource
    Mass transfer in smooth and rough annular ducts under developing flow conditions (1997)
    Springer
    Journal of applied electrochemistry 27 (1997), S. 201-207 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Rates of solid–liquid mass transfer were measured at the inner surface of an annular duct by the electrochemical technique under developing flow conditions. Variables studied were physical properties of the solution, velocity, length of the annulus, inlet port diameter and surface roughness. Inlet port diameter was found to have no effect on the rate of mass transfer. For smooth annuli the laminar flow data fit the equation: Sh = 1.029Sc0.33Re0.55(L/d)-0.472 The turbulent flow data fit the equation: Sh = 0.095Sc0.33Re0.85(L/d)-0.472 Surface roughness in the form of V-threads normal to the flow was found to have a negligible effect on the rate of mass transfer in the laminar flow region while in the turbulent region the data fit the equation: Sh = 0.167Sc0.33Re(L/d)-0.472(e/d)0.33 Under the present conditions, where the dimensionless roughness height e+ lies between 0.5 and 22, the rate of mass transfer was found to increase by an amount ranging from 10% to 200% depending on e+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018408125105
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  • 5
    Electronic Resource
    Electronic Resource
    The role of mass transfer in the electrolytic reduction of hexavalent chromium at gas evolving rotating cylinder electrodes (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 1161-1166 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The rate of electrolytic reduction of hexavalent chromium from acidic solution at a hydrogen-evolving rotating cylinder lead cathode was studied under conditions of different current densities, Cr6+ concentrations and rotation speeds. The rate of the reaction was found to follow a first order rate equation. The specific reaction rate constant was found to increase with increasing rotation speed until a limiting value was reached with further increase in rotation speed. Mechanistic study of the reaction has shown that at relatively low rotation speeds the reduction of Cr6+ is partially diffusion controlled, at higher speeds the reaction becomes chemically controlled. The limiting specific reaction rate constant was related to the operating current density by the equationK=0.044i 1.385. The current efficiency of Cr6+-reduction was measured as a function of current density, initial Cr6+ concentration and rotation speed. Possible practical applications are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297418
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  • 6
    Electronic Resource
    Electronic Resource
    Mass transfer characteristics of gas-sparged fixed-bed electrodes composed of stacks of vertical screens (1986)
    Springer
    Journal of applied electrochemistry 16 (1986), S. 374-378 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Mass transfer rates at a gas-sparged fixed-bed electrode made of stacks of vertical screens were studied by measuring the limiting current for the cathodic reduction of potassium ferricyanide. Variables studied were air flow rate, physical properties of the solution and bed thickness. The mass transfer coefficient was found to increase with increasing air flow rate up to a certain point and then remain almost constant with further increase in air flow rate. Increasing bed thickness was found to decrease the mass transfer coefficient. Mass transfer data were correlated by the equation $$J = 0.2(ReFr)^{ - 0.28} ({L \mathord{\left/ {\vphantom {L d}} \right. \kern-\nulldelimiterspace} d})^{ - 0.28} $$ For a single vertical screen electrode the data were correlated by the equation $$J = 0.187(ReFr)^{ - 0.26} $$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008847
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  • 7
    Electronic Resource
    Electronic Resource
    Thermoluminescence and storage stability of TLD-100 dosimeter irradiated with 60Co-gamma rays (1991)
    Springer
    Journal of materials science 26 (1991), S. 2240-2244 
    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 Thermoluminescence glow curves of TLD-100 revealed three peaks at 373, 460 and 518 K for all samples irradiated with gamma ray doses of 0.5 to 700 Gy. The total thermoluminescence response and the height of the main peak at 460 K showed similar characteristics to radiation dose. On the other hand, the total area under the glow curve increases continuously with radiation dose up to 1000 Gy. All irradiated samples investigated showed no significant fading over 28 d. Activation energy, E, and escape frequency factor, s, for the main glow peak were calculated by the modified empirical equation, as well as by methods depending on the shape of the glow peak. It was found that E has a value of 1.33 to 1.83 eV and s falls between 5.8×1013 and 3.06×1019 sec−1, depending on the method used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549194
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  • 8
    Electronic Resource
    Electronic Resource
    Nature of luminescence transition in low-resistivity n-type ZnS single crystals (1988)
    Springer
    Journal of materials science 23 (1988), S. 2382-2386 
    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 cathodoluminescence spectra of low-resistivity n-type ZnS single crystals were recorded. The emission peak energy shifted towards higher energies with a corresponding decrease in the half-width of the emission band as the temperature was decreased. Time-resolved emission spectra and the decay of luminescence were measured at 77 K, in which the energy of the emission band at its maximum shifted to lower energies during decay. The decay of luminescence was found to be non-exponential. These studies gave experimental evidence that the blue self-activated emission of low-resistivity n-type ZnS crystals is of the donoracceptor pair transition nature, and thereby the difference of emission peak energy for emitting ZnS diodes with different Schottky contacts was interpreted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01111892
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  • 9
    Electronic Resource
    Electronic Resource
    Thermoluminescence dosimetry in the μGy range of neodymium-doped tellurite-phosphate glass (1993)
    Springer
    Journal of materials science 28 (1993), S. 5133-5137 
    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 Thermoluminescence (TL) of tellurite-phosphate glass of the composition of (TeO20.81-P2O50.19) doped with different concentrations of Nd2O3 was prepared. The optimum concentration of Nd2O3 was experimentally determined as 10−3 wt% Nd2O3 in this glass. TL showed a single, isolated glow curve which peaked at approximately 498–513 K (depending on the Nd concentration). This peak is very suitable for radiation dosimetry, and obeys second-order kinetics. The TL response against the irradiation dose was found to be linear in the low-dose region (11.2–224.2 μGy), indicating the high sensitivity of our glass samples to low-dose γ rays. Finally, the trap depth was also calculated, using methods concerning the second-order kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00570052
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  • 10
    Electronic Resource
    Electronic Resource
    Diffusion in aqueous polymer solutions (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 20 (1976), S. 3247-3253 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The diffusion of Direct Blue 76 dye in aqueous dilute polymer solutions was studied using the capillary method. The polymer systems studied included dilute solution of carboxymethyl cellulose, poly(ethylene oxide), and polyacrylamide. It was found that the diffusion coefficient of Direct Blue 76 in carboxymethyl cellulose is higher than that in pure water, while in polyacrylamide and poly(ethylene oxide) solutions the value is lower than that in pure water. The diffusion coefficient of Direct Blue was found to decrease with increasing polymer concentration in case of poly(ethylene oxide) and polyacrylamide, while in case of carboxymethyl cellulose the diffusion coefficient increases with polymer concentration. The effect of temperature on the diffusion coefficient of Direct Blue 76 in the three polymers was found to obey the Arrhenius equation. The activation energy for diffusion of Direct Blue 76 in water, poly(ethylene oxide), polyacrylamide, and carboxymethyl cellulose was found to be 4.38, 7.7, 5.44, and 5 kcal, respectively, for polymer concentration of 0.25 g/l.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1976.070201206
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