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  • 1
    Electronic Resource
    Electronic Resource
    Thermal noise in high-temperature superconducting-normal- superconducting step-edge Josephson junctions (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 1337-1339 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated YBa2Cu3O7−δ-normal metal-YBa2Cu3O7−δ step-edge Josephson junctions that fit the resistively shunted junction model with Johnson–Nyquist thermal noise. The I-V curves are well fit over a large temperature range for junctions of varying critical current values. There is good agreement between the fitted thermal noise temperature and the measured ambient temperature. This is strong evidence that these junctions are not dominated by superconducting shorts longer than the superconducting coherence length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357798
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  • 2
    Electronic Resource
    Electronic Resource
    Anomalous compositional dependence in in situ growth of YBaCuO films at low oxygen pressure (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 756-758 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The roles of composition and oxygen pressure in in situ growth of superconducting YBaCuO films have been studied. Anomalous results are observed at low oxygen pressure. Off-stoichiometric, Ba-deficient films have superior superconducting properties and more bulk-like crystal structure compared to films made on the 1:2:3 stoichiometry. Films made at low pressure have an expanded c axis compared to the bulk value, although their Tc's are only slightly depressed. Tc and c-axis lattice parameters are reported as a function of the deposition conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104538
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructure of Cu- and Y-rich YBa2Cu3O7−x thin films: Identification of the CuYO2 phase (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 1158-1160 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The CuYO2 delafossite-type structure has been identified as a second phase in thin films of Cu- and Y-rich YBa2Cu3O7−x (123) made by electron beam co-evaporation at conditions of low oxygen pressure; this phase occurs as extremely small, densely distributed, highly oriented precipitates within the 123 matrix. The smallest (sub-100 A(ring)) [00.1] oriented precipitates of this hexagonal phase are strained to give a better lattice match to the surrounding 123 structure. The results suggest that, for thin film deposition conditions of sufficiently low temperature and pressure, there may be a tie line between YBa2Cu3O7−x and CuYO2 in the equilibrium phase diagram. The size and distribution of the precipitates is such as would be expected to influence structurally sensitive superconducting transport properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104224
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  • 4
    Electronic Resource
    Electronic Resource
    High temperature superconductor-normal metal-superconductor Josephson junctions with high characteristic voltages (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1984-1986 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated step edge superconductor-normal metal-superconductor microbridges using YBa2Cu3O7−x(YBCO) and noble metals with critical current-normal resistance (IcRN) products as high as 10 mV and normal resistances up to 38 Ω. Our fabrication process achieves high values of the IcRN product by exploiting the anisotropy in the properties of epitaxial YBCO films, allowing contact only between normal metal and superconductor through the crystalline axes which support the largest Josephson coupling. This results in a dramatic increase in the normal resistance of a junction without decreasing its critical current. We discuss the role of the superconductor-normal metal boundary resistance on the junction electrical properties. We have coupled submillimeter wave rf currents quasioptically into junctions integrated at the feeds of noble metal planar log periodic antennas and have induced up to 7 Shapiro steps in the current-voltage characteristics with a 760 GHz beam from a far infrared laser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110622
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  • 5
    Electronic Resource
    Electronic Resource
    The Proteases and Pathogenicity of Parasitic Protozoa (1993)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Microbiology 47 (1993), S. 821-853 
    Details
    ISSN: 0066-4227
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.mi.47.100193.004133
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  • 6
    Electronic Resource
    Electronic Resource
    Crystallization and preliminary X-ray diffraction studies of the influenza C virus glycoprotein (1996)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 1041-1045 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Influenza C virus contains a single surface glycoprotein in its lipid envelope which is the hemagglutinin-esterase-fusion glycoprotein (HEF). HEF binds cell-surface receptors, is a receptor-destroying enzyme (a 9-O-acetylesterase), and mediates the fusion of virus and host cell membranes. A bromelain-released soluble form of HEF has been crystallized. Two different tetragonal forms have been identified from crystals with the same morphology [P1(3)22, a = b = 154.5, c = 414.4 Å, and P41(3)212, a = b = 217.4, c = 421.4 Å]. Both crystal forms share a common packing scheme. Synchrotron data collection and flash cooling of crystals have been used for high-resolution data collection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444996005021
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  • 7
    Electronic Resource
    Electronic Resource
    Kutane Reaktionen bei Morbus Crohn Vaskulitiden verschiedener Etagen des Hautorgans (1997)
    Springer
    Der Hautarzt 48 (1997), S. 328-331 
    Details
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Morbus Crohn ; Ileitis terminalis ; Kutane Vaskulitis ; Purpura Schönlein-Henoch ; Erythema nodosum ; Key words Crohn disease ; Ileitis terminalis ; Cutaneous vasculitis ; Schönlein-Henoch purpura ; Erythema nodosum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Two young female patients presented with recurrent erythema and Henoch-Schönlein purpura respectively. In both cases clinical, histological and radiological showed relatively mild, but previously undiagnosed Crohn’s disease as a trigger. We describe the treatment of the underlying disease and the symptomatic treatment of skin lesions. Categories of specific and unspecific skin lesions associated with Crohn’s disease, as described in the literature, are presented. Vasculitic changes of the deep versus the superficial dermal plexus are discussed.
    Notes: Zusammenfassung Wir berichten über 2 junge Patientinnen mit rezidivierendem Erythema nodosum, bzw. Purpura-Schönlein-Henoch unklarer Genese. Bei der klinischen, histologischen und radiologischen Diagnostik zeigte sich in beiden Fällen als Trigger ein relativ mild verlaufender, bisher nicht erkannter Morbus Crohn. Die spezifische Therapie der Grunderkrankung bzw. symptomatische Behandlung der Hauterscheinungen wird beschrieben. Die Einteilung der spezifischen und unspezifischen Crohn-assoziierten Hautsymptome in der Literatur wird dargestellt, und die vaskulitischen Veränderungen des tiefen versus des oberflächlichen dermalen Gefäßplexus werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001050050591
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  • 8
    Electronic Resource
    Electronic Resource
    7Li-7Li elastic and inelastic scattering at Elab=8–17 MeV (1993)
    Springer
    The European physical journal 346 (1993), S. 47-61 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.B ; 25.70.H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Elastic and inelastic scattering in the system7Li+7Li was investigated experimentally in the energy range of Elab=8–17 MeV applying the method of kinematic coincidence. Sizeable cross sections were observed in the whole energy range for inelastic excitation of a single7Li nucleus to its first excited state atE *=0.47761 MeV as well as for mutual excitation of both nuclei. Systematic optical model and both one-step and two-step DWBA calculations were performed with the aim of describing in a consistent manner all three channels studied. This was achieved with optical model potentials fitted simultaneously to all elastic scattering data. They were then used to generate form factors for both single and mutual inelastic scattering as well as distorted waves for DWBA description of inelastic scattering considering the same deformation length for all form factors. Potential parameters derived show, despite these constraints, a continuous ambiguity in case of volume absorption while those with surface absorption can be grouped in six distinct families each of them featuring continuous ambiguities. The impact of real and imaginary form factors on single inelastic excitation is reversed for potentials with volume and surface absorption, while mutual excitation is dominated by imaginary form factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290781
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  • 9
    Electronic Resource
    Electronic Resource
    Investigation of the isospin-forbidden reaction6Li(6Li,d 2)10 B 0+,1 (1993)
    Springer
    The European physical journal 346 (1993), S. 173-179 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Hw ; 24.60.Dr ; 25.70.Ef,Gh ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of the isospin-forbidden reaction6Li(6Li, d2)10 B 0+,1 were measured at six beam energies in the range from 3 to 8 MeV. The contribution of two-step transfer mechanism to the reaction under consideration was found to be negligible. Hauser-Feshbach model cross sections, obtained with parameters derived from a previous analysis of isospin-allowed reactions in the6Li +6Li system are consistent with the data, provided a 2% reduction factor reflecting isospin mixing of compound nucleus levels. From this factor an isospin-breaking matrix element of 〈H c 2 〉1/2≈13 keV was deduced. The presence of one broad or several resonances with (J P ,T)=(1−, 1) or (2−,1) concentrated at an excitation energy of about 30.3 MeV in12C seems to be responsible for the observed shape of angular distributions and their energy dependence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01306075
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  • 10
    Electronic Resource
    Electronic Resource
    Six enteropathogens isolated from a case of acute gastroenteritis (1990)
    Springer
    Infection 18 (1990), S. 381-382 
    Details
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei einer deutschen Touristin wurden bei einer akuten Gastroenteritis nach Bali-Aufenthalt insgesamt sechs verschiedene darmpathogene Erreger isoliert, darunterEntamoeba histolytica, Plesiomonas shigelloides, Campylobacter jejuni, sowie drei verschiedene Salmonellenarten (Salmonella typhi-murium, Salmonella blockley, undSalmonella hadar).
    Notes: Summary Isolation of six different gastrointestinal pathogens (Entamoeba histolytica, Plesiomonas shigelloides, Campylobacter jejuni and three differentSalmonella species [Salmonella typhimurium, Salmonella blockley andSalmonella hadar]) in the feces of a German female tourist suffering from acute diarrhoea after a trip to Bali.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01646414
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