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  • 1
    Electronic Resource
    Electronic Resource
    Ultraviolet light assisted oxygenation process for submicron YBa2Cu3O7−δ thin film devices (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 5411-5418 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have successfully fabricated superconducting nanobridges and grain-boundary junctions from epitaxial YBa2Cu3O7−δ thin films with thickness between 20 and 30 nm and width down to ∼100 nm. The patterning process turned out to severely deteriorate the transport properties resulting in structural damage, corrosion, and oxygen loss. The most crucial steps are the baking procedure used to cure the electron beam resist, the resist development, and the ion beam etching process. By optimizing these steps and applying a suitable post-treatment procedure a significant enhancement of the sample quality could be achieved. An ultraviolet light assisted oxygenation procedure after the patterning process enabled us to achieve superconducting transition temperatures between 80 and 87 K and critical current densities at 4.2 K up to 4×107 A cm−2 for the nanobridges and 5×103–2×105 A cm−2 for the grain boundary junctions. At 4.2 K junctions with width down to 100 nm corresponding to a junction area down to 2.3×10−3 μm2 showed superconductivity. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1459599
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of Josephson vortex flow transistors with different gate line configurations (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1095-1097 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We performed numerical simulations and experiments on Josephson vortex flow transistors based on parallel arrays of YBa2Cu3O7–δ grain boundary junctions with a cross gate line allowing us to operate the same devices in two different modes named the Josephson fluxon transistor (JFT) and Josephson fluxon–antifluxon transistor (JFAT). The simulations yield a general expression for the current gain versus number of junctions and normalized loop inductance and predict higher current gain for the JFAT. The experiments are in good agreement with simulations and show improved coupling between gate line and junctions for the JFAT as compared to the JFT. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1346625
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  • 3
    Electronic Resource
    Electronic Resource
    Spin-dependent transport in the double-perovskite Sr2CrWO6 (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 3654-3656 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the preparation and characterization of the double-perovskite compound Sr2CrWO6 with a Curie temperature of 390 K. We have fabricated both Sr2CrWO6 bulk sintered polycrystalline bars and high-quality epitaxial thin films on SrTiO3 substrates by pulsed-laser deposition. The samples were characterized by thermogravimetric analysis, x-ray diffraction, electrical transport, and magnetization measurements. Polycrystalline samples containing a large number of grain boundaries show a large low-field magnetoresistance of up to 100% at 5 K. At room temperature, this effect is reduced to a few percent. Our results show that Sr2CrWO6 is an interesting candidate for room-temperature magnetoelectronic materials. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1421227
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  • 4
    Electronic Resource
    Electronic Resource
    Demonstration of a biogenetically unprecedented side chain in the marine sterol, gorgosterol (1970)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 92 (1970), S. 2179-2180 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00710a089
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  • 5
    Electronic Resource
    Electronic Resource
    Modulation of Aβ peptides by estrogen in mouse models (2002)
    Oxford, UK : Blackwell Science, Ltd
    Journal of neurochemistry 80 (2002), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Clinical studies have shown that estrogen deprivation through menopause is a risk factor in both the initiation and progression of Alzheimer's disease (AD) and that estrogen replacement therapy may be protective. One of the major pathological features in the human AD brain is the senile plaque, a proteinaceous structure composed mainly of heterogeneous peptides collectively known as A-beta (Aβ). In vitro studies have linked estrogen with Aβ modulation, suggesting that one-way that estrogen depletion at menopause may exacerbate the features of AD is through Aβ accumulation. To test this, two studies were performed on transgenic models of amyloidosis. Firstly, transgenic mice without detectable amyloid aggregates were subjected to ovariectomy and estradiol supplementation, and Aβ levels were assessed. Secondly, the effects of estrogen modulation were assessed in mice at an age when plaques would be forming initially. Overall, Aβ levels were higher in estrogen-deprived mice than intact mice, and this effect could be reversed through the administration of estradiol. These data suggest that, in vivo, estrogen depletion leads to the accumulation of Aβ in the CNS, which can be reversed through replacement of estradiol. These results provide evidence that post-menopausal estrogen depletion may be linked to an increased risk of AD through Aβ modulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.0022-3042.2001.00690.x
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic differentiation of European grayling populations across the Main, Danube and Elbe drainages in Bavaria (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 58 (2001), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Analysis of mitochondrial (ND-1/3/4 genes) and nuclear (GH-1 gene, four microsatellite loci) DNA markers of European grayling Thymallus thymallus populations identified strong genetic differentiation between the Rhine/Main, Elbe and Danube drainages in Bavaria, as a result of both present processes and past history. The Danube and the Main-Elbe group diverged about five times earlier than the populations of Main and Elbe. These data suggest that exchange and transfer of grayling stocking material between these drainages should be avoided, to maintain the genetic diversity and integrity of populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00513.x
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  • 7
    Electronic Resource
    Electronic Resource
    A hidden pseudogap under the ‘dome’ of superconductivity in electron-doped high-temperature superconductors (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 422 (2003), S. 698-701 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The ground state of superconductors is characterized by the long-range order of condensed Cooper pairs: this is the only order present in conventional superconductors. The high-transition-temperature (high-Tc) superconductors, in contrast, exhibit more complex phase behaviour, which ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01488
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  • 8
    Electronic Resource
    Electronic Resource
    60. Systemerkrankungen als Grenzen thoraxchirurgischer Eingriffe (1970)
    Springer
    Langenbeck's archives of surgery 327 (1970), S. 534-540 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Art der Erkrankung und die Durchführbarkeit vom Kranken her bestimmen die Indikationen thoraxchirurgischer Eingriffe. Systemerkrankungen, bei denen eine Thorakotomie gewöhnlich nutzlos und manchmal schädlich wäre, können ⊕uch oligosymptomatisch oder isoliert die Lungen und das Mediastinum betreffen. Dazu gehören die Gruppen der chronischen Entzündungen, der Kollagenosen, der lymphoretikulären Erkrankungen, der Gefäßleiden und Blutungsübel, der Stoffwechselstörungen. Die praktisch wichtigsten werden aufgeführt. Obwohl nicht zu den Systemerkrankungen im engeren Sinn gehörig, sind auch folgende Gruppen von Krankheiten im allgemeinen Kontraindikationen thoraxchirurgischer Eingriffe. Metastasen maligner Tumoren, entzündliche Lungenveränderungen, Lungenveränderungen aus physikalischer oder chemischer Ursache, Beteiligung der Bronchien oder des Lungenparenchyms an allergischen Erkrankungen, Mißbildungen und Entwicklungsstörungen. Abschließend wird afgezeigt, wie mit Hilfe mathematischer Optimierungsverfahren die Indikationsstellung verbessert werden kann.
    Notes: Summary The type of disorder and the suitability of the patient determine the indications for thoracic surgery. Systemic disorders, in which thoracotomy is usually useless and sometimes dangerous, may involve-either oligosymptomatically or isolatedly-the lungs or the mediastinum. They include chronic inflammations, collagen disorders, lymphoreticuloses, vascular and blood diseases, metabolic disorders. The following disorders, although not proper systemic disorders, are generally also contraindications for thoracic surgery: metastases of malignant tumors, pulmonary inflammations, pulmonary disorders due to physical or chemical causes, involvement of the bronchi or of the pulmonary parenchyma in allergic disorders, deformities, developmental disorders. Finally, the usefulness of mathematical optimalisation procedures for the improvement of indications is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259085
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  • 9
    Electronic Resource
    Electronic Resource
    4. Indikationen zum chirurgischen Eingriff —Wandlungen und Entwicklungen in internistischer Sicht (1974)
    Springer
    Langenbeck's archives of surgery 337 (1974), S. 65-74 
    Details
    ISSN: 1435-2451
    Keywords: Indications for Surgery, from a Medical Point of View ; Chirurgische Indikationen in internistischer Sicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die durch neuere Entwicklungen eingeführten, ausgeweiteten und eingeschränkten Indikationen chirurgischer Eingriffe werden gegliedert in mehr diagnostische und mehr therapeutische, die letzteren in direkte (Resektionen und/oder prothetischer Ersatz, Transplantationen) und in indirekte (auf pathophysiologischen Erwägungen beruhende) Eingriffe. Die Gesichtspunkte des Internisten werden zu den präoperativen Untersuchungen, zur Differentialdiagnose, zur Indikationsstellung und zur Nachbehandlung eingebracht. Eine Ausdehnung chirurgischer Eingriffe auf sorgfältig ausgewählte metastasierte Tumoren im Rahmen einer multidisziplinären onkologischen Therapie wird empfohlen.
    Notes: Summary Recent developments have both extended and restricted the indications for surgical intervention. In this review, surgical operations are divided into direct (e. g. resections, prosthetic substitution, organ transplantations) and indirect ones performed on the basis of pathophysiological factors. The author considers the internist's points of view on preoperative diagnostics, differential diagnosis, indications and postoperative treatment. He recommends the extension of surgery also to carefully selected cases of metastasizing tumours within a combined treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01278636
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  • 10
    Electronic Resource
    Electronic Resource
    Equivalence of continuous infusion and single injection of3H-thymidine for analysis of intravascular kinetics of neutrophilic granulocytes in the rat (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 816-817 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Einmalige und kontinuierliche Applikation von3H-Thymidin führen bei der Ratte zu identischen Markierungskurven der Blutgranulocyten. Eine Einzelinjektion des radioaktiven Vorläufers ermöglicht deshalb die autoradiographische Analyse der intravaskulären Granulocytenkinetik.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924203
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