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  • 2000-2004
  • 1995-1999  (7)
  • 1975-1979
  • 1997  (7)
  • 1
    Electronic Resource
    Electronic Resource
    A vital staining technique with fluorescein diacetate (FDA) and propidium iodide (PI) for the determination of viability of myxosporean and actinosporean spores (1997)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish diseases 20 (1997), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: A vital staining technique with fluorescein diacetate (FDA) and propidium iodide (PI) was used for determination of viability of myxosporean stage spores of Myxobolus artus and actinosporean stage spores of M. cultus. Viable spores stained green with FDA and non-viable spores stained red with PI were clearly distinguishable in M. artus myxosporean spores released from live infected fish, while the spores collected from pseudocysts were not well stained with FDA. Immediately after release from the oligochaete, Branchiura sowerbyi, actinosporean spores of M. cultus, stained bright green in the sporoplasms and red in the spore processes. In vitro survivability tests revealed that the longevity of M. artus spores was 5 months at 25°C and 15 months at 18°C. Drying and ultraviolet irradiation (36 000 mW s cm–2 for M. artus myxosporean spores, 600 mW s cm–2 for M. cultus actinosporean spores) were most effective as sporicidal treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.1997.00293.x
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  • 2
    Electronic Resource
    Electronic Resource
    Planar Chirality in 2,2-Diphenyl-1,3,6,9-tetraoxacycloundecane (1997)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 759-761 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270197000905
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Room-Temperature Form of Manganese Hexafluorosilicate Hexahydrate: a New Model with Submicroscopic Twinning (1997)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 833-836 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270196015454
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular Motion and Conformational Interconversion of Azobenzenes in Crystals as Studied by X-ray Diffraction (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 662-672 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Crystal structures of (E)-azobenzene (1), (E)-2,2′- dimethylazobenzene (2), (E)-3,3′-dimethylazobenzene (3) and (E)-4,4′-dimethylazobenzene (4) were determined by X-ray diffraction at various temperatures. An apparent shrinkage of the N=N bond and its temperature dependence were observed and are interpreted in terms of an artifact caused by the torsional vibration of the N—Ph bonds in crystals. In the crystal structures of (1), (3) and (4) the dynamic disorder was observed. The disorder is accounted for by the torsional vibration whose amplitude is large enough to give rise to the conformational interconversion. No disorder was observed for a crystal of (2). This is ascribed to the large difference in energy of the two conformers as free molecules. The true length of the N=N bond in azobenzenes was estimated to be 1.26–1.27 Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768197002772
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Microstructural characteristics of alumina-based composite prepared by in situ reaction of alumina-silicon carbide-nickel system (1997)
    Springer
    Materials research innovations 1 (1997), S. 10-15 
    Details
    ISSN: 1433-075X
    Keywords: Key words In situ reaction ; Alumina-based composite ; Carbon nanoball ; Encapsulated nanocrystals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  In situ reaction of nickel and silicon carbide has been attempted to prepare alumina-based composites containing some kinds of dispersed phases. The composites were fabricated by reducing and sintering of Al2O3/NiO/SiC mixtures. Reaction products (Ni3Si and C) and metallic Ni were found to disperse at the matrix grain boundaries, while Ni was partly trapped into Al2O3 grains. In addition, carbon nanoballs encapsulating Ni3Si were produced and dispersed in the composites. The carbon cages were approximately 80–100 nm in diameter with polyhedral shape, and had lattice spacing of 0.35 nm that was typical for the graphite. Encapsulated Ni3Si had facet planes which were parallel to the carbon layers surrounding. Production of metal encapsulated carbon nanoball within ceramic materials is the first successive result that might promote researches on such novel ceramic composites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100190050012
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  • 6
    Electronic Resource
    Electronic Resource
    Recoil implantation of7Be formed from ligands in metal β-diketonates (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 222 (1997), S. 105-108 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A series of metal β-diketonates were irradiated with bremsstrahlung of maximum energy of 50 MeV and the recoil behavior of7Be, formed from12C of ligands through12C(γ, αn)7Be reaction, was investigated.7Be nuclides thus formed were detected partially as central metal atoms of the complexes. Complex yields of7Be were compared and an anomalously high yield was observed in tris-acetylacetonatocobalt(III) [Co(acac)3].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034255
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Impact friction test method by applying stress wave (1997)
    Springer
    Experimental mechanics 37 (1997), S. 398-402 
    Details
    ISSN: 1741-2765
    Keywords: Kinetic friction ; dynamic testing ; stress wave analysis ; Hopkinson pressure bar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract To understand the dynamic response of two bodies in contact, kinetic friction during impact presently is focused on. A new testing technique, which provides the normal and the tangential impact force independently, is developed by modifying the split Hopkinson pressure bar method. Normal and torsional stress wave propagation in a one-dimensional framework of an axial impact of an input tube on a rotating output tube is analyzed and is experimentally verified. Kinetic friction of brass was clarified at a high rate of sliding up to 5 m/s and is found to be almost constant independent of normal force and sliding velocity. The present technique provides direct measurement of kinetic friction with simple configuration and data analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02317304
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