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  • 1
    Electronic Resource
    Electronic Resource
    Induction of SOS like responses by nitrofurantoin in Vibrio cholerae el tor cells (1993)
    Springer
    Archives of microbiology 159 (1993), S. 98-100 
    Details
    ISSN: 1432-072X
    Keywords: Prophage induction ; Weigle reactivation ; Mutation ; Filamentation ; Nitrofurantoin ; Vibrio cholerae el tor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Treatment of Vibrio cholerae el tor strain SLH22(J) with nitrofurantoin induced dose-dependent prophage ‘kappa’, the maximum induction being 6-fold the spontaneous induction level. UV-inactivated ‘kappa’ phages were Weigle reactivated, the maximum Weigle factor being 1.8 and 2.0 respectively in nitrofurantoin and UV pretreated el tor strain H218 Smr. Nitrofurantoin treatment also caused significant filamentation of the el tor strain H218 Smr and mutation of these cells from ampicillin sensitivity to ampicillin resistance. The levels of the four SOS-like responses induced by this drug were low but significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00244270
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  • 2
    Electronic Resource
    Electronic Resource
    Electrical and optical properties of ZnS0.05Se0.95 nanocrystalline thin films (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5652-5660 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: ZnS0.05Se0.95 nanocrystalline films were deposited onto fused silica and GaAs (100) substrates by the magnetron sputtering technique. The electrical conductivities of the films deposited onto fused silica substrates were measured in the temperature range of 180–300 K. It was observed that the low temperature conductivity could be explained by hopping of the charge carriers in the Coulomb gap while at elevated temperature Mott hopping is the predominant mode of conduction in these films. A distinct cross over from Efros–Shklovoskii to Mott hopping is observed for all the films. Optical spectra were found to be dominated by the combined effects of optical losses due to absorption and scattering. The absorption spectra indicated a blueshift, the extent of which depended on the crystallite size. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1370113
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  • 3
    Electronic Resource
    Electronic Resource
    Grain boundary scattering in CuInSe2 films (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 841-845 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electrical conductivity and Hall mobility of CuInSe2 films were measured in the temperature range of 77–400 K. The films were deposited with different Cu/In ratios ranging from 0.7–0.9 and at substrate temperatures of 620–720 K. Effects of grain boundary scattering on the electron transport properties were studied carefully and it was observed that scattering at the grain boundaries is a predominant factor controlling the electron transport properties at lower temperatures while complex scattering mechanisms become operative at higher temperatures. The energy values of trap levels and the densities of trap states were also obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349644
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  • 4
    Electronic Resource
    Electronic Resource
    Structural studies of CdSe films deposited on to glass, NaCl and KCI substrates by a hot-wall technique (1987)
    Springer
    Journal of materials science 6 (1987), S. 366-369 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01729355
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  • 5
    Electronic Resource
    Electronic Resource
    A new optical study of supersonic flow past wedge profiles by hydraulic analogy (1993)
    Springer
    Experiments in fluids 14 (1993), S. 210-213 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189513
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  • 6
    Electronic Resource
    Electronic Resource
    A Lower Carboniferous Lepidodendropsis flora in Kashmir (1979)
    [s.l.] : Nature Publishing Group
    Nature 281 (1979), S. 295-297 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Gund Formation comprises about 500 m of cyclic sediments consisting of conglomerates, sandstones and shales. It overlies unconformably the Syringothyris Limestone, regarded as of Tournaisian age on faunal grounds, and is overlain by the Fenestella Shale Formation of Upper Visean to Bashkirian ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/281295a0
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  • 7
    Electronic Resource
    Electronic Resource
    Surface plasmon resonance in nanocrystalline silver in a ZnO matrix (2004)
    Springer
    The European physical journal 39 (2004), S. 491-498 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Silver nanoparticles embedded in ZnO matrix were deposited onto fused silica substrates using high pressure (~40 Pa) d.c. sputtering techniques. The particle size in the films was tailored by varying the system pressure and substrate temperature, while the metal volume fraction was controlled by adjusting the relative time of sputtering of the targets. Blue-shift of the surface plasmon resonance peak was observed with the reduction in size and volume fraction of metal particles. A surface plasmon peak in the absorption spectra was found to be absent in the films with particle size and metal concentration below a critical value. A sharp absorption edge in the absorbance spectra within the UV-VIS range indicated semiconducting behavior of the ultrafine silver particles. Films deposited at lower substrate temperature showed a narrow distribution of nanoparticles, nearly spherical in shape. Increase in substrate temperature resulted in a non-uniform size and shape in the films due to the agglomeration of the nanoparticles. These size and shape distributions have a profound effect on the optical absorbance spectra and result in a broad and asymmetric surface plasmon band. A shape distribution introduced in the Maxwell-Garnett or Bruggeman effective medium theory was found to give a reasonable description of the experimentally observed optical absorption spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2004-00222-x
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  • 8
    Electronic Resource
    Electronic Resource
    An ellipsometric investigation of Ag/SiO $\mathsf{_2}$ nanocomposite thin films (2003)
    Springer
    The European physical journal 34 (2003), S. 25-31 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Dielectric properties of silver/SiO2 nanocomposite thin films grown by high-pressure d.c. sputtering technique were studied by spectroscopic ellipsometry (300-800 nm). The dielectric behavior of the nanocomposite thin films largely depended on the particle size, its number density and the surrounding environments. The films showed semiconductor-like behavior up to a critical particle size and concentration, beyond which the films exhibited the typical surface plasmon resonance characteristics in their optical properties. The refractive index was also found to have a strong dependence on the particle size and its dispersion in the matrix. The results were found to be consistent with those obtained from UV-VIS optical absorbance data. Bruggeman effective medium theory was used to explain the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00192-5
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  • 9
    Electronic Resource
    Electronic Resource
    Optical properties of ZnTe films (1987)
    Springer
    Applied physics 43 (1987), S. 81-84 
    Details
    ISSN: 1432-0630
    Keywords: 78.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Optical properties of p-type ZnTe films, deposited by hot-wall vacuum evaporation, were studied extensively in the range of incident photon energy 0.6–2.6 eV. Variations of refractive index, absorption and extinction coefficients with incident photon energy are reported in this communication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615211
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  • 10
    Electronic Resource
    Electronic Resource
    Wave propagation in an infinite piezoelectric crystal under a thermal field (1978)
    Springer
    Czechoslovak journal of physics 28 (1978), S. 807-812 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper deals with the propagation of vibrational waves in an infinite piezoelectric crystal plate belonging toC 2 (monoclinic system) when some sort of heat flow is maintained. The dispersion equations have been determined under a thermal field and also in the case when the heat flow is absent, both for small and large values of the frequency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01596003
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