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  • 1
    Electronic Resource
    Electronic Resource
    Preparation and photoelectrolytic behavior of the systems tungsten oxide (WO3-x) and tungsten fluoride oxide (WO3-xFx) (1978)
    s.l. : American Chemical Society
    Inorganic chemistry 17 (1978), S. 977-980 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50182a036
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal growth and characterization of the transition-metal phosphides copper diphosphide, nickel diphosphide, and rhodium triphosphide (1978)
    s.l. : American Chemical Society
    Inorganic chemistry 17 (1978), S. 283-286 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50180a018
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  • 3
    Electronic Resource
    Electronic Resource
    Recovery of spatial learning deficits after decay of electrically induced synaptic enhancement in the hippocampus (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 545-548 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Experiments were performed on 12 male F-344 rats (10 months of age). Under deep sodium pentobarbital anaesthesia, all rats underwent bilateral implantation of electrodes9 for stimulation of perforant path fibres in the vicinity of the angular bundle and for recording the resulting synaptic and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/342545a0
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  • 4
    Electronic Resource
    Electronic Resource
    The theory of the Taylor dispersion technique for liquid diffusivity measurements (1980)
    Springer
    International journal of thermophysics 1 (1980), S. 243-284 
    Details
    ISSN: 1572-9567
    Keywords: diffusion coefficient ; liquid mixtures ; Taylor dispersion ; liquid diffusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents a complete analysis of the theory of an instrument to measure the diffusion coefficients in liquid mixtures based upon the phenomenon of Taylor dispersion. The analysis demonstrates that it is possible to design an instrument that operates very nearly in accordance with the simplest mathematical description of the dispersion of a solute pulse in a fluid in laminar flow within a straight, circular cross-section tube. The small departures of a practical instrument from the ideal are evaluated as corrections by means of a general perturbation treatment that allows them to be examined one at a time. The corrections considered include the effects of the finite volume of the injection pulse, the finite volume of the concentration monitor, the coiling of the tube, and the nonuniformity and noncircularity of the cross section, as well as the variation of the fluid properties with composition. All the equations necessary for the design of an instrument of this type, and for the evaluation of experimental data free from significant systematic errors, are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00517126
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  • 5
    Electronic Resource
    Electronic Resource
    Mutual diffusivity in binary mixtures of n-heptane with n-hexane isomers (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 973-982 
    Details
    ISSN: 1572-9567
    Keywords: binary diffusion ; 2,2-dimethylbutane ; 2,3-dimethylbutane ; n-heptane ; n-hexane ; liquid mixtures ; 3-methylpentane ; Taylor dispersion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents a study of the influence of branching in the binary diffusion coefficients of n-heptane + n-hexane isomers, in the liquid state. The measurements have been made with the Taylor dispersion technique, at several compositions, at 283 and 298 K, for the X + n-heptane mixtures, where X= n-hexane, 3-methylpentane, 2, 3-dimethylbutane, and 2, 2-dimethylbutane. The results show a very interesting behavior of the composition dependence of the binary diffusion coefficients, presenting a maximum, for compositions about a molar fraction of n-heptane of 0.5, which increases with the increase in the degree of branching, suggesting the possibility of order-disorder effects caused by stereochemically favored packing in the liquid phase and energetically favored segment interaction in the liquid mixtures. An attempt to apply the van der Waals model to these data could not predict the experimental binary diffusion coefficients of these systems within the experimental accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503166
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  • 6
    Electronic Resource
    Electronic Resource
    Radiative heat transfer in transient hot-wire measurements of thermal conductivity (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 985-997 
    Details
    ISSN: 1572-9567
    Keywords: radiative heat transfer ; thermal conductivity ; toluene ; transient hot-wire technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New measurements of the thermal conductivity of liquid toluene between 300 and 550 K have been used to study the importance of radiative heat transfer when using the transient hot-wire technique. The experimental data were used to obtain the radiation correction to the hot-wire temperature rises. Radiationcorrected values of thermal conductivity are reported. This study shows that the transient hot-wire method is much less affected by radiation than steady-state techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503514
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  • 7
    Electronic Resource
    Electronic Resource
    Status of the round robin on the transport properties of R134a (1995)
    Springer
    International journal of thermophysics 16 (1995), S. 63-78 
    Details
    ISSN: 1572-9567
    Keywords: R134a ; dilute gas ; refrigerant ; saturation properties ; 1,1,1,2-tetrafluoroethane ; thermal conductivity ; transport properties ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper contains a status report on an international project coordinated by the Subcommittee on Transport Properties of Commission 1.2 of the International Union of Pure and Applied Chemistry. The project has been conducted to investigate the large discrepancies between the results reported by various authors for the transport properties of R134a. The project has involved the remeasurement of the transport properties of a single sample of R134a in nine laboratories throughout the world in order to test the hypothesis that at least part of the discrepancy could be attributed to the purity of the sample. This paper provides an intercomparison of the new experimental results obtained to data in this project for the viscosity and the thermal conductivity in both gaseous and liquid phases. The agreement between the viscosity data from the laboratories contributing to the project was improved with several techniques, now producing consistent results. This suggests that the purity of the samples of R134a used in previous work was at least partly reponsible for the discrepancies observed. For the thermal conductivity in the liquid phase the results of the measurements are also more consistent than before, although not for all experimental techniques. Not all of the previous measurements suffered from significant sample impurities, so the present measurements on a consistent high-purity sample can he used to detect data sets which are outhers, possibly because of impurities. Identification of laboratories and techniques with systematic differences may require the examination of data for several fluids. The implications for future measurements of the transport properties of other refrigerants are significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438958
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  • 8
    Electronic Resource
    Electronic Resource
    Density of 1,1-dichloro-1-fluoroethane (HCFC 141b) as a function of temperature and pressure (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 551-560 
    Details
    ISSN: 1572-9567
    Keywords: density ; HCFC 141b ; pressure ; temperature ; Tait equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The density of HCFC 141b has been measured at several temperatures between 260 and 320 K, Mid pressures up to 20 MPa, with a mechanical oscillator densimeter. The densimeter was calibrated with 2,2,4-trimethylpentane, whose density was obtained from a correlating cyuation with 0.3% uncertainty. The density data obtained for HCFC 14H) hits a reproducibility of 0.05% and an uncertainty of 0.3%. The data obtained were fitted to a Tait-type equation. which reproduced the experimental densities within 0.11 % and were compared with the data obtained in other works.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441502
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  • 9
    Electronic Resource
    Electronic Resource
    The dielectric constant of liquid HFC 134a and HCFC 142b (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 573-585 
    Details
    ISSN: 1572-9567
    Keywords: density ; dielectric constant ; dipole moment ; HFC 134a ; HCFC 142b ; Kirkwood equation ; refrigerant ; Vedam equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents measurements of the dielectric constant of HFC 134a and HCFC 1426, as a function of pressure and temperature, in the temperature range from 200 to 300 K and pressures up to 20 M Pa, using a direct capacitance method, The samples used had a stated purity of 99.8 and 99.9%, respectively, The values of the dielectric constant have a precision of 0.01 % and an accuracy of 0.1%, The data obtained were correlated as a function of density and pressure, The theory developed by Vedam et al,, based on the Eulerian strain. and the Kirkwood equation for the variation of modified molar polarization with temperature and density were applied to analyze the data and to obtain the dipole moment of both refrigerants in the liquid state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441504
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  • 10
    Electronic Resource
    Electronic Resource
    Thermal conductivity measurement of n-butane over wide temperature and pressure ranges (1983)
    Springer
    International journal of thermophysics 4 (1983), S. 11-33 
    Details
    ISSN: 1572-9567
    Keywords: butane ; corresponding states ; critical region ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal conductivity of n-butane has been measured by a coaxial-cylinder method over a pressure range from 0.1 MPa up to 70 MPa and a temperature range from room temperature to 600 K, covering all fluid states. The estimated accuracy of the method is about 2%. Special emphasis has been given to the behavior of the thermal conductivity near the critical point, and the critical enhancement has been studied for 3.6 K〈δT〈176 K. The effect of inelastic collisions upon transport properties of the dilute gas has been discussed. The results obtained for the reduced critical enhancement as a function of the reduced critical temperature confirm the universality of the critical exponent, for the n-alkanes, whereas the reduced excess thermal conductivity outside the critical region is a function of the reduced density and of the n-alkane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00504479
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