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  • 1990-1994  (12)
  • 1950-1954  (3)
  • 1930-1934  (1)
  • 1925-1929  (1)
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Year
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  • 11
    Electronic Resource
    Electronic Resource
    Magnetische Hysteresis bei hoher Frequenz (1928)
    Springer
    The European physical journal 51 (1928), S. 355-373 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Zwei Eisensorten, schwedischer Bandstahl und 50%ige Fe-Ni-Legierung der Fr. Krupp-A. G. wurden wechselnder Magnetisierung bei Frequenzen von etwa 500, 1500 und 2550 Hertz unterworfen und die Hysteresiskurven punktweise auf-genommen. Eine Vergleichung mit den statischen Kurven bei gleicher maximaler Magnetisierung ergab ein mit wachsender Frequenz zunehmendes Zurückbleiben der Magnetisierung hinter den statischen Werten. Die Vergrößerung der Hysteresis-verluste betrug für den Bandstahl etwa 3% bei 500 und 8 bis 9% bei 2550 Hertz, für die Fe-Ni-Legierung etwa 20% bei 500 und 60% bei 1500 Hertz. In roher Annäherung ist für eine gegebene Eisensorte scheinbare Vergrößerung der Koerzitivkraft proportional der maximalen Magnetisierungsgeschwindigkeit ∂B/∂t, unabhägig von der Feldamplitude und der Frequenz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338318
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Forces on intraocular lens haptics induced by capsular fibrosis (1990)
    Springer
    Graefe's archive for clinical and experimental ophthalmology 228 (1990), S. 363-368 
    Details
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Electronic dynamometry measurements, performed upon intraocular lens (IOL) haptics of prototype one-piece three-loop silicone lenses, accurately defined the relationships between elastic force and haptic displacement. Lens implantations in the capsular bag of dogs (loop span equal to capsular bag diameter, loops undeformed immediately after the operation) were evaluated macrophotographically 5–8 months postoperatively. The highly constant elastic property of silicon rubber permitted quantitative correlation of subsequent in vivo haptic displacement with the resultant force vectors responsible for tissue contraction. The lens optics were well centered in 17 (85%) and slightly offcenter in 3 (15%) of 20 implanted eyes. Of the 60 supporting loops, 28 could be visualized sufficiently well to permit reliable haptic measurement. Of these 28, 20 (71 %) were clearly displaced, ranging from 0.45 mm away from to 1.4 mm towards the lens' optic center. These extremes represented resultant vector forces of 0.20 and 1.23 mN respectively. Quantitative vector analysis permits better understanding of IOL-capsular interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920063
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    The kinetics of muon-catalyzed dt fusion (1993)
    Springer
    Hyperfine interactions 82 (1993), S. 357-372 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A main source of information about the muon-catalyzed fusion cycle in D-T mixtures are the cycling rates λc, which are characteristic for the kinetic equilibrium of states attained rapidly in dense targets. The measurement, analysis and interpretation of these rates will be discussed, concentrating on the extensive set of rates observed at PSI over the last decade in gaseous, liquid and solid targets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027973
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  • 14
    Electronic Resource
    Electronic Resource
    Epithermal effects in muon-catalyzed dt fusion: comparison of experimental data with theoretical predictions (1993)
    Springer
    Hyperfine interactions 82 (1993), S. 391-406 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Very high dtμ molecular formation rates for epithermal (i.e., not thermalized) muonic tritium atoms have been observed in experiments and are predicted by theory. The present detailed analysis shows qualitative agreement although further calculations will be needed to reach a complete understanding of all processes involved. The importance of epithermal effects for a correct description of muon-catalyzed fusion phenomena has been confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027975
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    Paper (German National Licenses)
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  • 15
    Electronic Resource
    Electronic Resource
    Dissolution of platinum metal alloys contained in the feed clarification sludge (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 152 (1991), S. 199-206 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The dissolution behaviour of two alloys, which represent the metallic precipitates, occurring in the dissolution step of a nuclear reprocessing plant was investigated. The solubility of these alloys, containing Mo, Ru, Rh and Pd, in HNO3-solutions is rather low and dissolution ceases after some time, caused by passivation. A significant acceleration of the dissolution rate takes place if ozone is passed through the alloy/HNO3-suspension, or if an electrolytic dissolver with or without an oxidation catalyst is used. Moreover, Ru can be separated as RuO4 by distillation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02042153
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    Paper (German National Licenses)
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  • 16
    Electronic Resource
    Electronic Resource
    Zur Entwicklungsgeschichte der Naphtol AS-Farbstoffe (1954)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 66 (1954), S. 429-434 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird ein Rückblick auf die vierzigjährige Entwicklung der Naphtol AS-Farbstoffe gegeben, die sich durch eine sehr reichhaltige Palette und große Kombinationsmöglichkeit auszeichnen. Vor allem werden die Besonderheiten ihrer Eigenschaften und deren Variation mit der Art der Substituenten, sowie die Herstellung haltbarer Diazosalze (Echtfärbesalze) behandelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19540661502
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    Paper (German National Licenses)
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  • 17
    Electronic Resource
    Electronic Resource
    Stromträgerrelaxationen in hochohmigen Polymerfestkörpern (1991)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 639-645 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Current carriers can cause currents after variation of the external electrical field, which depend on time just as relaxed dipols. The intensity and the position of the relaxation region and especially the nonlinear dependence between the stored charge and the external field are criterions for this. Blocking contacts cause relaxations of current carriers in poly(phenyl quinoxaline) and poly(ethylene terephthalate) samples. Detailed investigations of this phenomenon make possible informations on the density of the current carriers in the sample volume and on electrical properties of the contact region. Further ac-hopping is to be proved in poly(phenyl chinoxaline).
    Notes: Neben relaxierenden Dipolen können auch Stromträger zeitabhängige Ströme nach Änderung des äußeren elektrischen Feldes bewirken. Als Kriterien dafür werden neben Intensität und Lage des Relaxationsgebietes die nichtlineare Abhängigkeit der gespeicherten Ladung von der äußeren Feldstärke angesehen. In Poly(chinoxalin) und Poly(ethylenterephthalat) werden Stromträgerrelaxationen durch blockierende Kontakte verursacht. Detaillierte Untersuchungen erlauben Aussagen über die Stromträgerdichte im Probenvolumen und Eigenschaften der Kontaktschicht. In Poly(chinoxalin) ist weiterhin Wechselstromhopping nachweisbar.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1991.010421207
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    Paper (German National Licenses)
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