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  • 1995-1999
  • 1990-1994  (7)
  • 1940-1944
  • 1994  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Funnel-shaped vortical structures in wall turbulence (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 6 (1994), S. 3035-3050 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structure of the turbulent boundary layer in a horizontal open channel was investigated experimentally by means of laser Doppler anemometry (LDA) and by flow visualization synchronized with the LDA. These experiments indicate that the dominant structures in the wall region are large scale streamwise vortices which originate at the wall and grow and expand into the outer flow region. The shape of the vortices is that of an expanding spiral, wound around a funnel which is laid sideways in the direction of flow. Most of the observations of wall turbulence phenomena made over the years, such as quasistreamwise vortices, ejections, and sweeps seem to be part of these funnel-shaped vortices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868129
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Biochemical effects of carbaryl on nitrogen assimilating enzymes of cyanobacteria Nostoc muscorum (1994)
    Springer
    Bulletin of environmental contamination and toxicology 52 (1994), S. 886-892 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00200698
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fertile somatic hybrid between sexually incompatible Hyoscyamus muticus and Hyoscyamus albus (1994)
    Springer
    Plant cell reports 13 (1994), S. 537-540 
    Details
    ISSN: 1432-203X
    Keywords: Interspecific ; Somatic hybrid ; Protoplast fusion ; Hyoscyamus muticus ; Hyoscyamus albus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Somatic hybrid plants have been regenerated from fused protoplasts of a chlorophyll deficient mutant of H. muticus (2n=28) with wild type protoplasts of H. albus (2n=68). The inability of protoplasts of H. albus to regenerate was utilized in complementation with achlorophyllous, but regenerating, protoplasts of H. muticus for the selection of green somatic hybrid colonies and plants. The somatic hybrid plants showed intermediate morphological characters, and possessed 82–120 chromosomes, with a modal number of 96 which is also the amphidiploid complement of the two species. The isozyme patterns indicated the presence and expression of genes from both parents. The hybrid plants produced 33–78% viable pollen and set viable seeds upon selfing and backcrossing in a directional manner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232952
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Phosphorus containing polymers. Part 5. Polyazoxyphosphonate (1994)
    Springer
    Colloid & polymer science 272 (1994), S. 1203-1207 
    Details
    ISSN: 1435-1536
    Keywords: Polyazoxyphosphonate ; XPS-L01 ; 31P-NMR ; Flame retardancy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new polyazoxyphosphonate was synthesized by reaction of 4-4′-dihydroxyazoxybenzene and dichlorophenyl phospine oxide by interfacial polycondensation using a phase transfer catalyst. The polymer was characterized and the results obtained by various analytical techniques indicate that it is mostly amorphous, low molecular weight and soluble in organic solvents such as DMF, DMAC, NMP, etc. The high char residue (∼40%) and limiting oxygen index indicate flame retardancy of the polymer which is due to phosphorus. Thermal stability of this polymer is moderate. TheT g appears to be at 152°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657771
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Xylose metabolism in a thermophilic mouldMalbranchea pulchella var.sulfurea TMD-8 (1994)
    Springer
    Current microbiology 29 (1994), S. 349-352 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The thermophilic mouldMalbranchea pulchella var.sulfurea TMD-8 produced extracellular xylanases in wheat straw hemicellulose as well as wheat straw. This mould utilized xylose less efficiently than glucose. Mycelial extracts contained xylose isomerase, xylose reductase, and xylitol dehydrogenase. Xylose isomerase was less thermostable than that from other microorganisms. However, xylitol dehydrogenase and xylose reductase were relatively more thermostable in comparison with these enzymes from other microorganisms. The affinity of xylose isomerase for xylose was very high (Km 10mM), while that of xylose reductase was low (Km 23.5mM). The xylitol dehydrogenase exhibited relatively high affinity for xylitol (Km 0.02mM). The activity of this enzyme, however, declined steeply, in the alkaline range. This is the first report on the occurrence of three intracellular enzymes, xylose isomerase, xylose reductase, and xylitol dehydrogenase in a thermophilic mould, which play an important role in xylose metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570228
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Psychosexual dysfunction in Indian male patients: Revisited after seven years (1994)
    Springer
    Archives of sexual behavior 23 (1994), S. 685-695 
    Details
    ISSN: 1573-2800
    Keywords: psychosexual dysfunction ; erectile dysfunction ; premature ejaculation ; follow-up outcome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Psychology
    Notes: Abstract Short-term (1 year) outcome of 66 male patients with psychosexual dysfunction was studied in the context of patients' sociodemographic and clinical characteristics. A combination of erectile dysfunction and premature ejaculation was the most common diagnosis. Long-term (7 years) outcome of this cohort was evaluated in relation to short-term outcome. Improvement in the short-term indicated favorable long-term outcome. Initial dropout was associated with chronic and continuous sexual dysfunctioning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01541819
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Role of calcium in the inhibition of nitrogenase activity by Methylparathion and Benthiocarb in the cyanobacterium Nostoc muscorum (1994)
    Springer
    World journal of microbiology and biotechnology 10 (1994), S. 303-307 
    Details
    ISSN: 1573-0972
    Keywords: Calcium ; cyanobacterium ; herbicide ; nitrogenase ; insecticide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Methylparathion and Benthiocarb inhibition of N2 fixation in the cyanobacterium Nostoc muscorum was reversed by Ca2+ at 1 mm but not at 0.1 mm. The concentration of intracellular Ca2+ was relatively high in the presence of these pesticides when 1 mm Ca2+ was also present, indicating that intracellular Ca2+ may participate in protecting nitrogenase activity against Methylparathion and Benthiocarb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414869
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    Paper (German National Licenses)
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