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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Langmuir 8 (1992), S. 2140-2146 
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-9136
    Keywords: Earthquake related stress changes ; San Andreas fault ; Tres Pinos earthquake ; Coalinga earthquake ; dislocation models ; creepmeters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Rates of shallow slip on creeping sections of the San Andreas fault have been perturbed on a number of occasions by earthquakes occurring on nearby faults. One example of such perturbations occurred during the 26 January 1986 magnitude 5.3 Tres Pinos earthquake located about 10 km southeast of Hollister, California. Seven creepmeters on the San Andreas fault showed creep steps either during or soon after the shock. Both left-lateral (LL) and right-lateral (RL) steps were observed. A rectangular dislocation in an elastic half-space was used to model the coseismic fault offset at the hypocenter. For a model based on the preliminary focal mechanism, the predicted changes in static shear stress on the plane of the San Andreas fault agreed in sense (LL or RL) with the observed slip directions at all seven meters; for a model based on a refined focal mechanism, six of the seven meters showed the correct sense of motion. Two possible explanations for such coseismic and postseismic steps are (1) that slip was triggered by the earthquake shaking or (2) that slip occurred in response to the changes in static stress fields accompanying the earthquake. In the Tres Pinos example, the observed steps may have been of both the triggered and responsive kinds. A second example is provided by the 2 May 1983 magnitude 6.7 Coalinga earthquake, which profoundly altered slip rates at five creepmeters on the San Andreas fault for a period of months to years. The XMM1 meter 9 km northwest of Parkfield, California recorded LL creep for more than a year after the event. To simulate the temporal behavior of the XMM1 meter and to view the stress perturbation provided by the Coalinga earthquake in the context of steady-state deformation on the San Andreas fault, a simple time-evolving dislocation model was constructed. The model was driven by a single long vertical dislocation below 15 km in depth, that was forced to slip at 35 mm/yr in a RL sense. A dislocation element placed in the seismogenic layer under XMM1 was given a finite breaking strength of sufficient magnitude to produce a Parkfield-like earthquake every 22 years. When stress changes equivalent to a Coalinga earthquake were superposed on the model running in a steady state mode, the effect was to make a segment under XMM1, that could slip in a linear viscous fashion, creep LL and to delay the onset of the next Parkfield-like earthquake by a year or more. If static stress changes imposed by earthquakes off the San Andreas can indeed advance or delay earthquakes on the San Andreas by months or years, then such changes must be considered in intermediate-term prediction efforts.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0630
    Keywords: 73.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The work function of 13 polycrystalline transition metal suicides was measured by photoemission in uhv. Their values are discussed in relationship to their Schottky barrier heights on n-Si. While there appears to be a weak correlation for a certain group of transition metal suicides, the values of the 5d-noble metal suicides including some of the lattice matched Ni suicides appear to be completely uncorrelated. Experimental values of work functions are compared to the values proposed previously by Freeouf.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1076
    Keywords: Cancer ; Leukaemia ; Hepatitis ; Hepatitis-C virus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A total of 203 paediatric cancer treatment survivors were tested for serum antibodies against hepatitis-C virus (anti-HCV). Anti-HCV was detected in 41 patients (20.2%) with first generation anti-HCV ELISA. Positive results were confirmed in all samples retested with a second generation ELISA (n=35) and in all but two cases re-analysed by immunoblotting (n=23). Anti-HCV positive children had received significantly more blood product transfusions compared to seronegative patients. In 75 children (32%) chronic liver disease was found. It was defined as an elevation of serum alanine aminotransferase values to a least 2.5 times the upper limit of normal persisting for 6 months or longer. Hepatitis A was never detected, and in 58 children the chronic hepatopathy was unexplained by hepatitits B (non-A non-B chronic liver disease). Of these patients 29 (50%) were seropositive for anti-HCV. Surprisingly, non-A/non-B chronic liver disease was associated with anti-HCV in 14 of 19 solid tumour patients (78.9%), but in no more than 14 of 39 leukaemia and lymphoma patients (35.9%). This phenomenon was not explained by different rates of cytomegalovirus disease and drug toxicity related hepatopathies between the two groups. It may be related to differences of leukaemia/lymphoma compared to solid tumour therapy schedules (differential immuno-suppression and liver toxicity).
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Herz-, Thorax- und Gefässchirurgie 13 (1999), S. 67-72 
    ISSN: 0930-9225
    Keywords: Schlüsselwörter Aortale Eingangsimpedanz ; Windkesselfunktion ; „Wrapping“ ; Key words Aortic input impedance ; windkessel ; “wrapping”
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A decrease in compliance of the ascending aorta caused by prosthetic replacement or “wrapping” may lead to a partial loss of the arterial Windkessel-function. The following study investigated the effects of this intervention on aortic input impedance.  In 8 pigs, the wall of the ascending aorta was wrapped with a prosthesis. This approach was chosen to minimize additional influence of extended operative procedures on the ascending aorta, like extracorporal circulation, cardioplegia or blood loss. Flow and pressure were recorded before and after the intervention, and following Fourier Transformation, the aortic input impedance was calculated.  Mean pressure, mean flow, and total peripheral resistance were unaltered, while there was a significant increase in blood pressure amplitude and characteristic impedance in response to the “wrapping” procedure. Thus, it becomes obvious that even the loss of elastic properties of the ascending aorta only leads to an increase of left ventricular load.
    Notes: Zusammenfassung Prothetischer Ersatz oder Versteifung der Aorta ascendens durch „Wrapping“ können zu einem teilweisen Verlust der Windkesselfunktion des arteriellen Systems führen. In der folgenden, tierexperimentellen Studie wurde untersucht, welchen Einfluß dieser Eingriff auf das Spektrum der aortalen Eingangsimpedanz hat.  Bei 8 Hausschweinen wurde die Aorta ascendens durch Ummantelung mit einer Prothese versteift. Dieses Vorgehen wurde gewählt, um zusätzliche Einflüsse großer operativer Interventionen an der thorakalen Aorta (extrakorporale Zirkulation, Kardioplegie, Blutverlust) zu vermeiden oder zu minimieren. Vor und nach „Wrapping“ wurden Druck und Fluß in der proximalen Aorta gemessen und die aortale Eingangsimpedanz bestimmt.  Blutdruckamplitude und charakteristische Impedanz stiegen nach dem Eingriff signifikant an, während Mitteldruck, mittlerer Fluß und peripherer Widerstand unverändert blieben. Damit wurde gezeigt, daß bereits der Verlust der elastischen Eigenschaften der Aorta ascendens zu einem meßbaren Anstieg der linksventrikulären Nachlast führt.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 862 (1986), S. 294-302 
    ISSN: 0005-2736
    Keywords: Alkyl maltoside ; Dialysis kinetics ; Vesicle formation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Molecular Basis of Disease 1227 (1994), S. 137-154 
    ISSN: 0925-4439
    Keywords: Bile acid transport ; Drug delivery ; Drug targeting ; HMG-CoA reductase inhibitor ; Liver specificity ; Photoaffinity labeling
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0008-6215
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    The @Journal of Supercritical Fluids 7 (1994), S. 265-274 
    ISSN: 0896-8446
    Keywords: PAH ; adsorption ; carbon dioxide ; contaminated soil ; solubility ; supercritical-fluid extraction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Schizophrenia Research 9 (1993), S. 239 
    ISSN: 0920-9964
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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