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  • 1
    Electronic Resource
    Electronic Resource
    Deposition and reduction of Nd1.85Ce0.15CuO4−y superconducting thin films (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 2356-2358 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting thin films of Nd1.85Ce0.15CuO4−y (NCCO) were grown at 720–820 °C by pulsed laser deposition in N2O atmosphere. The reduction subsequent to the deposition was found to be critical, and was studied systematically for various temperature, atmosphere, and duration. An ac susceptibility technique was used to stringently characterize the film quality. Very high quality films were made with optimized reduction conditions which showed a Tc(R=0) of 22.4 K, with a transition width of 0.2 K and a Jc (4.2 K) of 8×105/cm2 at zero field. Microwave surface resistance Rs was measured at 9.6 GHz and a value of ∼3 mΩ was obtained at 4.2 K in a 5000 A(ring) thick NCCO film.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108242
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  • 2
    Electronic Resource
    Electronic Resource
    Electric field effect in high Tc superconducting ultrathin YBa2Cu3O7−x films (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 3470-3472 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A multilayer high Tc superconducting field-effect transistor-like structure was made from ultrathin YBa2Cu3O7−x films. An epitaxially grown dielectric SrTiO3 insulation layer, which had a forward bias breakdown voltage of about 20 V, allowed an electric field induced change in the channel layer of 1.25×1013 carrier/cm2 per volt of the gate voltage. A significant modulation of the normal state and superconducting properties was observed in samples with YBa2Cu3O7−x channel layers of a few unit cells thick. By applying gate voltage of different polarities, Tc was both suppressed and enhanced by ∼1 K. The resistance was modulated by as much as 20% in the normal state and by over 1500% near the zero resistance temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105656
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  • 3
    Electronic Resource
    Electronic Resource
    Sr2AlTaO6 films for multilayer high-temperature superconducting device applications (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1718-1720 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of Sr2AlTaO6 (SAT) and multilayers of YBa2Cu3O7 (YBCO)/SAT have been grown by pulsed laser deposition on [001] LaAlO3 substrates. X-ray diffraction shows that SAT grows on [001] LaAlO3 with the c-axis oriented normal to the substrate plane. X-ray rocking curve and Rutherford backscattering channeling measurements on SAT films yield full width at half maximum of 〈0.3° and minimum backscattering yield χmin of 5%–7%, respectively, indicating good crystallinity. The real part of the dielectric constant εr is found to be ∼23–30, with ∼6×107 V/m static breakdown electric field. Both the dielectric constant and the static breakdown field show negligible temperature dependence between 10 and 300 K. A 100 nm×10 μm×50 μm YBCO film on SAT shows zero-field critical current density of ∼1.3×106 A/cm2 at 77 K, with a superconducting transition temperature Tc0 of ∼89.2 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108408
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  • 4
    Electronic Resource
    Electronic Resource
    Torsade de pointes and long QT syndrome following major blood transfusion (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We report a rare complication following transfusion of a large volume of blood in an adult patient. An electrophysiological disturbance of the cardiac cycle with prolongation of the QT interval developed, which was followed by recurrent episodes of torsade de pointes, a unique form of ventricular tachycardia. The most likely cause of this acquired long QT syndrome was hypomagnesaemia secondary to massive blood transfusion. Treatment with a magnesium infusion restored the QT interval to normal and temporary ventricular pacing prevented further ventricular arrhythmias.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb02008.x
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of rigid-rod star-block copolymers of a varying number of arms (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 1373-1376 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00031a001
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  • 6
    Electronic Resource
    Electronic Resource
    Solvent evaporation induced torsad texture of sheared liquid-crystalline polymers (1991)
    s.l. : American Chemical Society
    Macromolecules 24 (1991), S. 4942-4947 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00017a034
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  • 7
    Electronic Resource
    Electronic Resource
    Generation of synthetic seismograms with layer reduction (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 111 (1992), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The surface motion in a plane multilayered half-space has been considered. Layer matrices of SH and P-SV motions are written as sums of matrices. Using these it is seen that when shear wave velocity of a layer, say the lth, is greater than the phase velocity, and layer thickness is large compared to wavelength, the surface motion can be written with the lth layer as the terminating half-space. Thus in computation of surface motion, the depth of the terminating half-space in a given structure depends on phase velocity and frequency. Further, if the source is below the terminating half-space, it has no contribution to surface motion at that phase velocity and frequency for which the terminating half-space has been obtained. This layer reduction formulation is applied in the generation of synthetic seismograms. As this generation requires computation over large ranges of phase velocity and frequency, the present method is important in avoiding excess computation time for unnecessary layers and in avoiding overflow due to the above mentioned lth layer. The method is most useful in low phase velocity and high frequency ranges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1992.tb00556.x
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of muscarinic receptor agonists and antagonists on dopamine-mediated behavioural paradigms (1991)
    Springer
    Journal of neural transmission 84 (1991), S. 241-246 
    Details
    ISSN: 1435-1463
    Keywords: Post-swim grooming response ; apomorphine-induced climbing behaviour ; dopamine-mediated behaviour ; muscarinic M1 and M2 receptors ; heteroreceptors ; cholinergic modulation of dopaminergic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effects of some muscarinic M1 and M2 receptor agonists and antagonists on two dopamine-mediated behavioural paradigms, namely postswim grooming response and apormorphine-induced climbing behaviour, was investigated in mice. The M1 agonists and M2 receptor antagonists attenuated both paradigms, whereas the M1 receptor antagonists and M2 receptor agonists facilitated both behaviours. However, carbachol and physostigmine, exhibited a similar dose-dependent dual effect with the lower doses augmenting and the higher doses inhibiting both the behaviours, suggesting that the M2 agonist receptor specificity is lost on dose increment. The findings indicate that the central cholinergic muscarinic heteroreceptors, like the other muscarinic receptors, are functionally divisible into M1 and M2 receptor subtypes in their modulation of dopaminergic activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01244975
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  • 9
    Electronic Resource
    Electronic Resource
    Hydration behavior of mixed ligand chromium complexes. Part I: partial molar volumes and partial molar adiabatic compressibilities of oxalato and mixed oxalato — Ethylxanthato chromate(III) complexes (1992)
    Springer
    Journal of solution chemistry 21 (1992), S. 699-710 
    Details
    ISSN: 1572-8927
    Keywords: Partial molar volume and adiabatic compressibility ; hydration number ; potassium ethylxanthate ; dioxalato ethylxanthato chromate ion ; K[Cr(ox)2(H2O)2] ; K3[Cr(ox)3] ; K2[Cr(ox)2SSCOC2H5]
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Densities and ultrasonic velocities in aqueous solutions of cis-K[Cr(ox)2(H2O)2], K3[Cr(ox)3] and KSSCOC2H5 and a mixed ligand complex K2[Cr(ox)2SSCOC2H5], where SSCOC2H5 is the ethylxanthate ligand, have been measured at 25, 35 and 45°C. Limiting partial molar volumes, partial molar adiabatic compressibilities and hydration numbers of the complex salts as well as of the ligand have been calculated. The implication of the findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650762
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  • 10
    Electronic Resource
    Electronic Resource
    Surface wave and lithospheric structure across the northwestern part of the Indian peninsula (1991)
    Springer
    Pure and applied geophysics 135 (1991), S. 53-59 
    Details
    ISSN: 1420-9136
    Keywords: Surface wave ; lithospheric structure ; Indian peninsula
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Group velocities of fundamental mode Rayleigh and Love waves have been obtained across the central highlands in the northwestern part of the Indian peninsula and across the plateau region of the peninsula. Such data across the latter region were also obtained earlier and revealed model lithosphere IP11 for this region. Data of the two regions are similar and show that the lithospheric model IP11 continues from the plateau region to the central highlands. The model IP11 has been verified by comparing observed Love wave forms with synthetics ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877008
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