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  • 11
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 33 (1992), S. 2039-2042 
    ISSN: 0040-4039
    Keywords: Microwave irradiation ; addition reactions ; homogeneous catalysis
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 13 (1972), S. 4103-4106 
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 15 (1974), S. 3193-3196 
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 17 (1994), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— The cyclic stress-strain response of two heats of austenitic stainless steel 3 16L was experimentally studied under a wide range of cyclic plastic strain amplitudes. Three domains on the cyclic stress- strain curve were found. In the middle domain the plateau behaviour corresponds to fatigue softening. The domain at low plastic strain amplitudes is characterized by stabilized behaviour and the domain of the highest plastic strain amplitudes by continuous hardening. Individual domains were correlated with observed dislocation structures. The existence of the plateau can be related to the localization of the cyclic strain into persistent slip bands. A Manson-Coffin plot of the material over a wide cyclic amplitude range is curved and can be approximated by a double logarithmic dependence.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Schizophrenie ; Magnetencephalographie ; Akustisch-evozierte Felder ; Geschlechtsunterschiede ; Hemisphärenasymmetrie ; Key words Schizophrenia ; Magnetoencephalography ; Acoustically evoked fields ; Gender differences ; Hemispheric asymmetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In this magnetoencephalography study the issue of hemispheric lateralisation in patients with schizophrenia was addressed using acoustically evoked neuromagnetic fields. The characteristics of dipoles in the superior temporal gyrus, the primary auditory cortex, were calculated. In contrast to other studies, alterations did not concern the localisation, but rather the orientation of dipoles. Of pathophysiological interest was that the dipoles abnormalities were found left-hemispherically in male (p=0.02) and right-hemispherically in female patients with schizophrenia (p=0.01) when compared to controls. The findings suggest gender-specific alterations of hemispheric lateralisation in schizophrenia.
    Notes: Zusammenfassung In dieser Magnetenzephalographiestudie wurde die Frage der Hemisphärenlateralisation bei Patienten mit einer Schizophrenie mittels akustisch evozierter neuromagnetischer Felder untersucht und die Charakteristika von Dipolen berechnet, die im Bereich des Gyrus temporalis superior, dem primären Hörkortex, entstehen. Im Gegensatz zu Vorbefunden betrafen die Alterationen weniger die Dipollokalisation als vielmehr die Dipolorientierung. Pathophysiologisch aufschlußreich war, daß die Dipolabweichungen im Vergleich zu Kontrollen bei männlichen Schizophrenen linkshemisphärisch (p=0,02), bei weiblichen Schizophrenen rechtshemisphärisch (p=0,01) nachweisbar waren. Dieses Ergebnis spricht für geschlechtsspezifische Unterschiede der Hemisphärenlateralisation bei Schizophrenien.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 10 (1979), S. 77-81 
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Было исследовано присоединение зтилцианоацетата к 1-децену и зтил 10-ундециленоату, катализированное CuO, термически и ди-трет.-бутилперекисью. Реакция, катализированная CuO, протекает с высокой скоротью уже при 80°C, даваф аддукты с составом 1∶1 с высоким выходом. Эта реакция представляет собой первый пример катализа в реакциях радикального присоединеиня негалогенированных соединений.
    Notes: Abstract CuO catalyzed additions of ethyl cyanoacetate, initiated thermally and by di-tert-butyl peroxide, to 1-decene and ethyl 10-undecylenoate were investigated. The CuO catalyzed reaction proceeds already at 80°C at a high rate, produces 1∶1 adducts in high yields and represents the first example of catalysis in radical addition reactions of non-halogenated compounds.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 120 (1890), S. 497-535 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-1084
    Keywords: Becker dystrophy ; Duchenne dystrophy ; High-energy phosphates ; 31P MR spectroscopy ; Principal component analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A total of 14 boys with the Duchenne and Becker forms of muscular dystrophy (DMD, BMD) were examined using 31P magnetic resonance (MR) spectroscopy; 12 boys were examined repeatedly. The results were correlated with clinical findings (including those of genetic tests) and with data obtained from examinations of an age-matched control group. Evaluation of results using principal component analysis revealed maximum variability in the following ratios: phosphocreatine/inorganic phosphate (PCr/Pi), phosphocreatine/phosphodiesters (PCr/PDe) and phosphocreatine/phosphomonoesters (PCr/PMe). A decrease in PCr/Pi correlates with weakness of the hip girdle and of the lower part of the shoulder girdle in DMD/BMD patients. The values of all ratios in the group of patients with the DMD phenotype differ significantly from results obtained in the group with the BMD phenotype. Continoous follow-up of patients using 31P MR spectroscopy revealed a marked decrease in PCr/Pi in DMD/BMD patients at an age that could be expected in subjects with a typical clinical course of DMD/BMD. An attempt to manage a concomitant disease with prednisone and carnitene was followed by an increase in PCr/Pi in 3 cases. A rise in the PCr/Pi ratio signalled clinical improvement in the patients. A decrease in PCr/Pi was found after controlled physical training, a finding consistent with data obtained from clinical observations describing an adverse effect of physical stress on the dystrophic process.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 238 (1989), S. 203-207 
    ISSN: 1433-8491
    Keywords: Narcolepsy ; Bright white light ; Circadian rhythms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Bright white light (5001x) for 4 h/day was applied to seven narcoleptic patients (age 47–65 years, mean 55 years). The effects of the light on the disturbed sleep-wake cycle in narcoleptics were investigated by the measurement of the following parameters: (1) excessive daytime sleepiness and sustained attention (multiple sleep latency test); (2) rest-activity cycles; (3) self-ratings (mood, anxiety, tiredness); (4) urinary cycles of 6-OH melatonin sulphate and cortisol; (5) sleep EEG. Treatment with bright light showed neither objective nor subjective changes in the clinical symptoms of narcolepsy. While similar “dosage” light applications can phase shift human circadian rhythms and improve depression and hypersomnia in winter depression, it is not an appropriate treatment for narcolepsy.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 55 (1985), S. 237-241 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The flexibility of a cantilever beam caused by a symmetrical crack in the damped cross-section and the resulting decrease of the natural frequencies is simulated by a spring at the cantilever's support point. Fracture mechanics provide a means for the estimation of the magnitude of the spring stiffness.
    Notes: Übersicht Die durch einen am Einspannquerschnitt vorhandenen Riß bedingte Nachgiebigkeit und weiter die daraus resultierende Eigenfrequenzabsenkung wird durch eine Einspann-Drehfeder des Kragträgers simuliert. Die Größe dieser Drehfeder wird anhand einer vorliegenden Lösung des bruchmechanischen Problems abgeschätzt.
    Type of Medium: Electronic Resource
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