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  • 1
    ISSN: 1432-1440
    Keywords: Levodopa ; Inotropic drugs ; Congestive heart failure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To evaluate the long-term effects of orally administered levodopa, 11 patients with chronic congestive heart failure (NYHA III–IV) were studied during maintenance therapy (30±1 days) and after withdrawal from levodopa. The daily levodopa dose was 4 g in six patients; because of side effects the levodopa dose was reduced to 2–3 g in the remaining patients. After withdrawal of levodopa, mean pulmonary capillary wedge pressure and mean right atrial pressure increased significantly (from 19±2 to 24±3 and from 7±2 to 9±2 mmHg, respectively). Effective renal plasma flow was 329±57 during levodopa therapy and decreased significantly to 252±27 ml/min after withdrawal of levodopa. The number of ventricular premature contractions and couplets increased during levodopa therapy and decreased again significantly after withdrawal of levodopa. No significant differences between on and off levodopa were observed in resting heart rate, arterial blood pressure, cardiac index, stroke work index, systemic vascular resistance, sodium and water excretion, or creatinine clearance. Seven patients improved on levodopa therapy by one NYHA class; four of these seven patients deteriorated again by one NYHA class after withdrawal of levodopa. Regarding both clinical and hemodynamic changes after withdrawal of levodopa, three patients were classified as responders to long-term levodopa therapy. All three responders received 4 g levodopa per day. Average dopamine plasma level was 5.3±0.8 ng/ml in the responder group and 2.0±0.5 ng/ml in the nonresponder group. Long-term administration of oral levodopa is associated with beneficial clinical and hemodynamic response in only a minority of patients with chronic congestive heart failure.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 2604-2606 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spectral output characteristics of an injection-controlled XeF(C→A) excimer laser pumped by a short pulse (10 ns), high current density (250 A/cm2) electron beam are reported. A tuning bandwidth of 50 nm full width half maximum, centered at 490 nm, with a peak specific energy density of 1.3 J/l was measured using an injection laser intensity of ∼2 MW/cm2. Continuously tuned output across the entire blue-green region (450–530 nm) with an energy density exceeding 0.2 J/l was achieved. Injection beam spectral linewidths as narrow as 0.001 nm were shown to be preserved in the XeF(C→A) laser output.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 565-567 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The performance of a pulsed laser system consisting of an electron beam pumped XeF(C→A) amplifier injection-controlled by a wavelength-agile dye laser is reported. Random sequence tuning over a 27 nm spectral region, centered at 478.5 nm, was demonstrated at a 1 Hz pulse repetition frequency. Laser output energies of 0.8 J with pulse durations of 10 ns were measured.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 62 (1993), S. 1203-1205 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An ultrahigh-brightness ArF excimer laser system is described that is capable of generating pulse energies of 60 mJ with a pulse duration of ∼700 fs. The system utilizes a newly developed seed pulse generation scheme based on spectrally compensated sum-frequency mixing in beta-barium metaborate (BBO), and a double-pass discharge pumped ArF excimer preamplifier followed by an electron beam pumped power amplifier.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 62 (1996), S. 431-435 
    ISSN: 1432-0649
    Keywords: 42.55.Lt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An X-ray preionized spiker-sustainer XeCl-excimer laser operating at high repetition frequency (1000 Hz) and 220 W of average laser power is demonstrated. The pulse energy and the pulse duration (160 ns) are virtually independent of the repetition frequency. Comparison with aC-L-C circuit shows superior properties of spiker-sustainer excitation for high-frequency operation. Furthermore, a variation of the overshoot mode is proposed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 82 (1984), S. 201-204 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A γ-ray source of ≈300 keV was used in order to excite the fluorescent K-radiation of the heavy elements which is only weakly absorbed in the walls of metal tubes. Thus, uranium can be determined quantitatively in solutions within tubes in the concentration range form 5 mg/l to 100 g/l. The influences of the energy and the activity of the radiation source, the geometrical arrangement, the thickness of the wall and the wall material have been investigated.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of orofacial orthopedics 48 (1987), S. 527-535 
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary There are different causes for functional disturbances of the temporomandibular joint, such as loss of teeth or surgical intervention. However, orthodontic cases may have latent pre-existing conditions, which may be provoked as a result of treatment. All patients shown had no signs or symptoms of TMJ involvement prior to orthodontic treatment. Examples of orthodontically induced TMJ dysfunction are shown, such as internal derangement, with or without reduction. A list of treatment modalities that may produce TMJ problems during treatment is presented.
    Abstract: Résumé On note assez frequemment des perturbations fonctionnelles du système stomatognathique après des traitements prothétiques, dento-chirurgicaux ou maxillo-chirurgicaux. En plus, certains actes orthodontiques peuvent causer des perturbations fonctionnelles pendant un traitement orthodontique, car dans les cas sus-mentionnés aucun patient ne présentait une symptomatologie pathologique de l'articulation temporo-mandibulaire avant le traitement orthodontique. On a trouvé des exemples de perturbations fonctionnelles iatrogènes comme des déplacements de disque avec ou sans craquement articulaire. Enfin, on a établi un tableau indiquant les modalités de traitement impliquant un certain risque de causer des perturbations fonctionnelles.
    Notes: Zusammenfassung Häufiger bekannt sind Funktionsstörungen des stomatognathen Systems nach prothetischen, zahnärztlich-chirurgischen oder kieferchirurgischen Eingriffen. Aber auch gewisse kieferorthopädisch-orthodontische Maßnahmen können mit dem Auftreten von Funktionsstörungen während einer kieferorthopädischen Behandlung in Zusammenhang gebracht werden. Alle angeführten Fallbeispiele zeigten vor einer kieferorthopädischen Behandlung einen unsymptomatischen Gelenkbefund. Beispiele von iatrogenen Funktions-störungen wie Diskusverlagerungen mit oder ohne Gelenkknacken werden aufgezeigt. Eine Tabelle von Behandlungsmodalitäten mit gewissem Risiko für Funktionsstörungen wird besprochen.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 320 (1985), S. 652-652 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 34 (1951), S. 2162-2171 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden einige neue quaternäre Ammoniumsalze aus der Reihe der p-substituierten [Phenoxy-alkyl]-dimethyl-aralkyl-ammonium-salze hergestellt und auf ihre bakterizide Wirkung gegen Staphylococcen und Coli-Bakterien untersucht. Hinsichtlich der Zusammenhänge zwischen Konstitution und Wirkung konnten einige Feststellungen gemacht werden, die sich zum Teil mit den Beobachtungen decken, die von verschiedenen Autoren in andern Stoffklassen gemacht werden konnten.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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