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  • 1985-1989  (5)
  • 1989  (2)
  • 1988  (3)
Materialart
Erscheinungszeitraum
  • 1985-1989  (5)
Jahr
  • 1989  (2)
  • 1988  (3)
  • 1987  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 1989-1991 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Samples of LaBa2 Cu3 O7−y have been synthesized, which show a superconducting transition above 90 K. One of the samples shows a superconducting transition with an onset at 93 K and a zero resistivity at 92 K. These temperatures are the highest among those reported so far on this system and even higher than those in YBa2 Cu3 O7−y. The magnetic susceptibility measurement also shows that it has a superconducting transition with onset at around 93 K. To synthesize such good LaBa2 Cu3 O7−y requires two important procedures. First is sintering above 950 °C in N2 gas atmosphere and the second is annealing at 300 °C in dried O2 gas atmosphere.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4095-4102 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The high-Tc superconductor LaBa2Cu3Oy has been prepared under various conditions, and characterized by x-ray and neutron powder diffraction techniques, dc and ac magnetic susceptibility measurements, and dc resistivity measurement. It has been found that samples with excellent superconducting characteristics and also with good structural properties are obtained in a reproducible way if the following three procedures are performed: preheat treatment of La2O3 powders, sintering in N2, and low-temperature annealing in dried O2. Long-time annealing in undried O2 was sometimes found to degrade the grain boundaries and to lead to a lower zero-resistance temperature.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 1719-1721 
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: This paper outlines the status of a 6-GeV synchrotron radiation designed at RIKEN. This facility consists of a main storage ring, a booster synchrotron, a 1.5-GeV preinjector linac, positron injection linacs, and others. The electronan GeV. The storage ring has a circumference of 1069.2 m and 7-m-long straight sections for insertion devices. The lattice of the main ring is a Chasman–Green-type one and has 36 periodicity. The low emittance (εx=8.2 nm rad) and large dynamic aperture are expected even with field errors and misalignments of magnetic elements. Three years of a preconstruction research and development period and 5 years of construction period are scheduled.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 141-148 
    ISSN: 1570-7458
    Schlagwort(e): rice leaf roller ; Cnaphalocrocis medinalis ; insect migration ; mating ; ovarian development ; light trap
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Résumé Une différence géographique dans l'activité reproductrice des papillons de la population de C. medinalis a été observée dans les champs de paddy d'automne du Kyushu septentrional au Japon. Cette différence géographique dans la fréquence des accouplements de la population ressemble à celle de l'importance de la densité d'immigration au début de l'été: la proportion de femelles inséminées est élevée dans les populations de la côte occidentale de Kyushu et basse dans la région intérieure. Les captures de papillons aux pièges lumineux, en 1985, suggèrent l'existence au Kyushu septentrional d'invasions d'outre-mer venant de Chine. Ces immigrations potentielles automnales de papillons dans les champs de paddy à maturité expliqueraient correctement les variations au cours de la même saison de l'activité reproductrice des papillons suivant les localités. Ces migrations ne sont apparemment pas adaptatives puisque les immigrants ou leur progéniture seront immédiatement tués à la récolte ou par le froid hivernal.
    Notizen: Abstract A geographical difference in reproductive status of moths in populations of C. medinalis Guénée was recognized in autumn paddy fields of north Kyushu, south-west Japan. This geographical variation in mating frequency of the population resembled the intensity of immigrant density in early summer: the proportion of mated females in the population was high in the west coast regions of Kyushu and low in inland areas. Light trap catches of moths in 1985 suggested overseas invasions from China in the autumn to westerly regions of north Kyushu. The potential autumn immigrations of moths in ripening paddy fields would satisfactorily explain the variations in reproductive status of moths with locality in the same season. These migrations are apparently non-adaptive because immigrants or their progeny would soon be killed at harvest or from cold weather.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Origins of life and evolution of the biospheres 19 (1989), S. 229-230 
    ISSN: 1573-0875
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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