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  • 1
    Digitale Medien
    Digitale Medien
    Feasibility of a detector for nuclear radiation based on superconducting grains (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1471-1476 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: We studied the sensitivity of a radiation detector based on metastable superconducting grains. Radiation is detected by the phase transition from the superconducting to the normal-conducting state of a grain induced by energy absorption. Metastable states of tin and cadmium grains were tested. The phase boundary of a large sample of grains was found to be broadened due to variations of the phase diagrams of single grains. Therefore, the use of superconductors with a low critical temperature Tc and an operation temperature close to Tc seems advisable to increase the sensitivity of the detector. For Cd grains a sensitivity normalized to the grain volume of 12 eV/μm3 was achieved for the detection of γ rays. These grains showed an instability in the superconducting to normal-conducting phase transition for temperatures below 350 mK.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1139383
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  • 2
    Digitale Medien
    Digitale Medien
    Shape selectivity in olefin hydrogenation using rhodium-containing zeolites (1985)
    s.l. : American Chemical Society
    Inorganic chemistry 24 (1985), S. 1800-1803 
    Details
    ISSN: 1520-510X
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ic00206a020
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  • 3
    Digitale Medien
    Digitale Medien
    Effects of alprazolam and diazepam on the daytime sleepiness of non-anxious subjects (1985)
    Springer
    Psychopharmacology 87 (1985), S. 194-197 
    Details
    ISSN: 1432-2072
    Schlagwort(e): Alprazolam ; Diazepam ; Arousal drug effects ; MSLT ; Performance testing ; Tolerance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Eighteen non-anxious volunteers underwent sleep recordings and daytime tests of sleepiness, performance, and mood while receiving, either alprazolam 0.5 mg b.i.d. or diazepam 5 mg b.i.d. for 7 consecutive days. Recordings and tests were done before treatment and on the 1st and 7th days of treatment. Nocturnal sleep changes were similar for both groups; there were no statistically significant changes in mood. However, levels of daytime sleepiness differed. Alprazolam subjects showed more daytime sedation than diazepam subjects on treatment day 1, but showed a significant decreased in Day 1–7 daytime sedation. Although diazepam subjects were less sedated at the onset, they showed no tolerance to this effect; thus by treatment day 7, the two groups did not differ in levels of daytime sleepiness. Results suggested that tolerance to alprazolam's sedative effects (which develops during the 1st week of treatment) may be separable from tolerance to its antianxiety effects (which develops after at least 4 weeks). As daytime sedation is common and potentially dangerous with most anxiolytics, selective tolerance to this side effect is highly desirable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00431806
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  • 4
    Digitale Medien
    Digitale Medien
    Buspirone: An anxiolytic without sedative effect (1985)
    Springer
    Psychopharmacology 87 (1985), S. 371-373 
    Details
    ISSN: 1432-2072
    Schlagwort(e): Arousal ; Drug effects ; Psychomotor performance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Twelve volunteers with a complaint of chronic insomnia participated in a placebo-controlled, doubleblind, crossover study of the effects of buspirone t.i.d. on sleep pattern and daytime function. The drug was tested alone and in combination with flurazepam or triazolam. Buspirone alone did not impair objective measures of daytime wakefulness or performance. Impaired alertness was seen the day after bedtime administration of flurazepam but not after triazolam; buspirone did not alter these effects. Buspirone did not affect the Multiple Sleep Latency Test, a sensitive measure of changes in daytime alertness.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00432724
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  • 5
    Digitale Medien
    Digitale Medien
    Differences of nucleoproteins of human and avian influenza a virus strains shown by polyacrylamide gel electrophoresis and by the peptide mapping technique (1986)
    Springer
    Archives of virology 90 (1986), S. 289-299 
    Details
    ISSN: 1432-8798
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Electrophoretic mobility differences in polyacrylamide gels were detected between (35S)-methionine-labelled nucleoproteins (NPs) induced in monolayer cells by 15 human and 4 avian reference strains of influenza viruses. The (35S)-methionine-labelled tryptic peptides of nucleoproteins of these strains were also analyzed by peptide mapping technique. Based on several detectable hydrophilic peptides the NPs could be arranged in 7 clearly differentiable groups. After radioiodination of NPs from 4 human and 3 avian reference strains the tryptic peptide patterns showed one clear difference between human and avian strains.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01317377
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  • 6
    Digitale Medien
    Digitale Medien
    A comparison of prednisolone with azathioprine and prednisolone with intramuscular gold in rheumatoid arthritis (1988)
    Springer
    Clinical rheumatology 7 (1988), S. 181-187 
    Details
    ISSN: 1434-9949
    Schlagwort(e): Pulse Steroid Therapy ; Gold ; Azathioprine ; Rheumatoid Arthritis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Pulse prednisolone hemisuccinate therapy (500 mg given intravenously on three occasions over two weeks) has been combined with either intramuscular sodium aurothiomalate or azathioprine in an assessment of 30 patients with rheumatoid arthritis. Significant improvement in a variety of clinical and biochemical assessments was seen in both groups. Both treatments were well tolerated by the patients and prednisolone appeared to accelerate the response to sodium aurothiomalate and azathioprine but there was no great evidence that it enhanced it.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02204452
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  • 7
    Digitale Medien
    Digitale Medien
    In-beam investigation of ternary fission (1988)
    Springer
    The European physical journal 330 (1988), S. 189-195 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.85.−w
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Nuclear fission accompanied by long-range alpha particles has been investigated. Fission was induced by irradiating a natural uranium target with 13.5 MeV deuterons. The alpha energy and angular distributions are similar to those observed in spontaneous or thermal neutron induced fission. The correlation angle between alpha particles and light fission fragments has a most probable value of $$\bar \vartheta _{l f - \alpha } = 82.1^\circ \pm 0.9^\circ $$ and a dispersion (FWHM) of Δϑ=18.4°±1.2°. The mean value and dispersion of the energy distribution are $$\bar {\rm E}_\alpha = 14.8 \pm 1.0 MeV$$ and ΔE=9.1±1.2 MeV (FWHM), respectively. The peak-to-valley ratio of the ternary fission fragment mass distribution is found to increase with increasing alpha energy. For near-symmetric mass division, a strong broadening of the angular distribution is observed. The results are discussed in the frame of a multichannel-fission model.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01293395
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  • 8
    Digitale Medien
    Digitale Medien
    Charged particle induced ternary fission (1987)
    Springer
    The European physical journal 328 (1987), S. 495-496 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Ternary fission has been investigated by irradiating a natural uranium target with 13.5 MeV deuterons. The energy and angular distributions of ternary alpha particles do not differ from those observed in spontaneous or thermal neutron induced fission. The angle between alpha particles and light fragments has a most probable value of $$\bar \vartheta _{\ell f - \alpha } = 82.1 \circ \pm 0.6 \circ $$ with a dispersion (FWHM) of $$\Delta \vartheta = 18.4 \circ \pm 1.2 \circ $$ . The corresponding values of the energy distribution are $$\bar E\alpha $$ =(14.8 ±0.5)MeV and ΔE(FWHM)= (9.1±1.1)MeV. The peak-to-valley ratio of the ternary fission fragment mass distribution is found to increase with increasing alpha energy. For near-symmetric mass division a strong broadening of the angular distribution is observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289637
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  • 9
    Digitale Medien
    Digitale Medien
    Shell effects in the evolution of the mass asymmetry in heavy-ion collisions leading to composite systems withZ=108 (1986)
    Springer
    The European physical journal 325 (1986), S. 335-346 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70 Jj ; 25.85 Ge
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Fragment mass distributions are presented obtained in the heavy-ion reactions22Ne+249Cf,32S+238U,40Ar+232Th and56Fe+208Pb leading to composite systems with equal nuclear charge numberZ=108. The experiments were performed at the heavy-ion cyclotron U 300 of the Laboratory of Nuclear Reactions in Dubna. The spectrometer DEMAS was used to measure the time-of-flight values and the laboratory angles of the correlated fragments. The shape of the mass distributions strongly depends on the initial mass asymmetry. When decreasing the bombarding energy down to values near the Coulomb barrier, the mass distributions obtained in the reactions32S+238U and40Ar+232Th exhibit relative maxima ofM≈205 interpreted to be due to stabilizing effects of nuclear shells during the fragmentation process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294618
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  • 10
    Digitale Medien
    Digitale Medien
    Zur Polymerisation von C4-Kohlenwasserstoffen mittels Trimesitylvanadium (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 299-303 
    Details
    ISSN: 0323-7648
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Beschreibung / Inhaltsverzeichnis: Trimesityl vanadium is able to polymerize butadiene whereby polymers are formed with nearly equal portions of cis-1,4-, trans-1,4- and 1,2-structure units after a long incubation period. By the addition of AlBr3 the polymerization is started immediately but the polymers have lower molecular weights. If a C4 hydrocarbon mixture is used as a source for butadiene, formation of copolymers with isobutene results in which the isobutene blocks are separated by butadiene units.
    Notizen: Trimesitylvanadium ist in der Lage, Butadien zu polymerisieren, wobei nach langer Inkubationszeit Polymere mit nahezu gleichen Anteilen an cis-1,4-, trans-1,4- und 1,2-Struktureinheiten entstehen. Durch Zusatz von AlBr3 wird die Polymerisation sofort eingeleitet, es entstehen jedoch Polymerisate mit niedrigeren Molmassen. Wird ein C4-Kohlenwasserstoffgemisch als Butadienquelle eingesetzt, dann kommt es zur Bildung von Copolymeren mit Isobuten, in denen Isobutenblöcke durch einzelne Butadieneinheiten getrennt sind.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/actp.1986.010370511
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