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  • 1985-1989  (11)
  • 1975-1979  (8)
  • 1925-1929
  • 1986  (11)
  • 1975  (8)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 2313-2322 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temporal growth rates, spatial behavior, and saturation characteristics of stimulated Brillouin scattering (SBS) occurring in a CO2 laser–gas jet experiment are investigated experimentally by picosecond Thomson scattering of ruby laser light as well as by intensity and spectral measurements of the backscattered light. Exponential temporal growth of the ion acoustic waves was observed and found to have a growth rate in good agreement with theory. Spatial modulations in the ion-acoustic-wave amplitude resulting from plasma inhomogeneities were found to limit the backscattered reflectivity to less than 10%. The ion acoustic waves saturate at a fluctuation amplitude of 〈20%. Ion trapping is shown to account for the observed saturation as well as temporal modulations in the ion-acoustic-wave amplitude and sibebands in the backscattered spectra.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Sociology 1 (1975), S. 223-246 
    ISSN: 0360-0572
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Sociology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 3451-3455 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Stimulated Raman scattering (SRS) in a CO2 laser(λ0=10.6 μm) produced plasma has been studied experimentally. The enhanced electron plasma wave (epw) fluctuations observed with ruby laser Thomson scattering have been compared with the scattered infrared (IR) spectra and the high-energy (near 100 keV) electrons. No scattered IR light in the range 1.5λ0 〈λ〈2λ0 was observed although the epw fluctuations suggested there should be IR light in this range. A signal was detected at 2λ0 which is due to the two plasmon decay instability. The number and energy spectra of the fast electrons are well correlated with the Thomson scattered wave vector spectra.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 13 (1986), S. 0 
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The hardening ability of a dental palladium–silver (Pd–Ag–Sn–In) bonding alloy has been investigated, and the distribution of the elements along the metal–ceramic interface have been studied by microprobe analysis. The alloy was found to be highly heterogeneous in its ‘as-cast’ condition, but homogenized alloy was obtained after heating the alloy at 1000°C for 2h. Hardening occurred after annealing at 650°C for 1 h. A longer thermal treatment caused the hardness to decrease (over-ageing). The change in hardness could be attributed to an internal oxidation phenomenon. The additional elements tin and indium segregated towards the ceramic–metal interface, with a diffusion of indium only into the porcelain. Diffusion of silver in the ceramics, supposed to be the cause of the ‘greening’ of dental porcelains baked on silver-rich alloys, has not been detected by the microprobe across the interface.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1435-2451
    Keywords: Aortocoronary bypass surgery ; Aorto-coronare Bypass-Chirurgie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von den bis Juli 1974 am Texas Heart Institute durchgeführten 3780 aorto-coronaren Bypass-Operationen waren 95 Patienten 70 Jahre oder älter. Die anfänglich hohe Operationsmortalität in dieser Altersgruppe mit 27% stand in klarem Gegensatz zur Gesamtmortalität von 7,1% und konnte im letzten Jahr - hauptsächlich auf Grund von Verbesserungen in der Operationstechnik - von 27 % auf 4,8 % reduziert werden. Damit kann auch beim alten Patienten, im Einzelfall, eine coronare Bypass-Operation als Behandlungsmöglichkeit ins Auge gefaßt werden.
    Notes: Summary From October 1969 through June 1974, 95 patients over 70 years of age underwent aortocoronary bypass at the Texas Heart Institute. The primary indication for surgery was severe angina, which was present in 88 patients. The mean coronary artery score was 9.51. Improvements in surgical technique are responsible for a reduction in the hospital mortality from 22.1 percent in all 95 patients to only 4.8 percent in the 21 patients operated upon during the first 6 months of 1974.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1435-2451
    Keywords: Endocarditis ; Valvular complications ; Endokarditis ; Herzklappenprothesen ; Komplikationen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 225 Patienten wurden wegen aktiver bakterieller Endokarditis oder der Klappenkomplikationen operiert. Die Frühmortalität betrug 12%. Bei 16 Patienten kam es zur Prothesendehiszenz - davon überlebten 6 Patienten die notfall mäßige Reoperation und 7 Patienten verstarben -, eine Indikation zu ausgedehnter Resektion des erkrankten Gewebes. Das mittlere Operationsalter betrug 43 Jahre. Auf Grund der vorliegenden Daten darf angenommen werden, daß die Mortalität durch eine kombinierte klappenchirurgische- und Coronararterien-Operation - falls indiziert-weiter gesenkt werden kann.
    Notes: Summary Between 1959 and 1973, 225 patients were operated on because of active bacterial endocarditis or its valvular complications. The hospital mortality was 12 percent and 60 patients died an average of 2 years after the operation. Seven early deaths occurred among 16 cases of acute dehiscence of the prosthetic valve-an indication for extensive resection of all diseased tissues. The average age was 43 years and there were 21 deaths due to myocardial infarction. The authors believe that the operative mortality can be further reduced through combined valvular and coronary artery surgery where this is indicated.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 42 (1986), S. 104-104 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-069X
    Keywords: X-Linked ichthyosis ; Carriers ; Aryl sulfatase C ; Leukocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    The international journal of cardiovascular imaging 2 (1986), S. 21-30 
    ISSN: 1573-0743
    Keywords: transesophageal echocardiography ; valve surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 17 patients (10 patients with mitral insufficiency, 5 patients with tricuspid regurgitation, 2 patients with mitral stenosis) the result of valve reconstruction was evaluated by intraoperative two-dimensional transesophageal contrast-echocardiography (TEE). Therefore, 1–2 cc of an agitated contrast-medium (GelifundolR) were injected into the left or right ventricle. The result of reconstruction was assessed by the extent of regurgitant microbubbles into the left or right atrium. A successful valve repair could be demonstrated in 15 patients without or with only minimal regurgitation of contrast-fluid. In one patient residual severe mitral insufficiency after valve reconstruction could only be detected when valve function was examined by contrast-TEE in the beating heart. An intraoperative decision for valve replacement was made. In another patient, mild to moderate residual mitral incompetence was shown; no further surgical intervention was done. By TEE the function of reconstructed valves can be examined under physiological conditions in the beating heart. Surgeons can obtain additional intra-operatively information and certainty about the result of reconstruction and an early decision for valve replacement can be made if necessary.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 7 (1975), S. 127-130 
    ISSN: 1432-0630
    Keywords: Superconductivity ; Non-equilibrium transport properties ; Current induced transition
    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 current-induced step structure in the phase transition from the superconducting to the normal conducting state of whiskers of tin shows hysteretic behaviour. By shunting the whisker by a small normal conductor a stable reentrant part of theV(I)-characteristic (negative differential resistance) could be measured for the first step both by de and ac instruments. If the condition of stabilization is not fullfilled, the voltage in the hysteretic region shows oscillations. These oscillations were measured and calculated with a simple model.
    Type of Medium: Electronic Resource
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