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  • 1
    Electronic Resource
    Electronic Resource
    Temperature-dependent roughness of electronically excited InP surfaces (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5968-5972 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Topographical evolution of 100 MeV Au8+-ion-irradiated InP surfaces was studied using atomic-force microscopy (AFM). The surfaces were roughened under dense electronic excitations. Root-mean-square roughness measured from AFM studies showed an exponential saturation behavior with fluence. Sample temperature during irradiation was found as a parameter to control the amount of roughness on the surface and the evolution of irradiated surface topography is discussed in terms of thermal spike model. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1416864
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  • 2
    Electronic Resource
    Electronic Resource
    Episome-like behaviour of donor DNA in transformed strains of Neurospora crassa (1976)
    [s.l.] : Nature Publishing Group
    Nature 264 (1976), S. 251-253 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We used DNA-intercalating drugs to eliminate the non-integrated episomes from the transformed strains of Neuro-spora. Both ethidium bromide and acridine have been used successfully to induce loss of autonomous episomes from bacteria6'8 and their mode of action is well known9?11. The drug-induced ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/264251a0
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  • 3
    Electronic Resource
    Electronic Resource
    Appearance of superparamagnetism on heating nanosize Mn0.65Zn0.35Fe2O4 (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 475-477 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nanosize particles (average size ∼12 nm) of mixed ferrite Mn0.65Zn0.35Fe2O4 were prepared by the hydrothermal precipitation route and studied using x-ray diffraction, transmission electron microscopy, differential scanning calorimetry, magnetization measurements, and Mössbauer spectroscopy. The as-prepared sample was largely ferrimagnetic and, as the sample was annealed at temperatures above 250 °C, it gradually became superparamagnetic. This unexpected behavior is explained by assuming that the cation distribution in the nanosize as-prepared sample is in a metastable state and, as the sample is heated, this distribution changes to a more stable state while the grain size remains nearly the same. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125792
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  • 4
    Electronic Resource
    Electronic Resource
    Galactosyltransferase of Neurospora (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 864-865 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An enzyme, galactosyltransferase, able to catalyze the formation of galactose polymers was detected in cell-free extracts of a wild type strain of Neurospora crassa. Enzyme activity was found in both the supernatant and the particle fractions after centrifugation at 100,000 xg. The enzyme assayed in the 100,000 xg supernatant showed a 4fold difference in specific activity as compared to that found in the particle fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951247
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  • 5
    Electronic Resource
    Electronic Resource
    An ethidium bromide induced mutant of Neurospora crassa defective in mitochondrial DNA (1989)
    Springer
    Current genetics 16 (1989), S. 303-305 
    Details
    ISSN: 1432-0983
    Keywords: Ethidium bromide ; Stopper ; mtDNA ; Restriction enzyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Slow growing mutants of Neurospora crassa were obtained by ethidium bromide treatment of the wild type strain. A particular mutant ER-3 showed stopper phenotype accompanied by deficient cytochrome spectra. The mutant showed an altered restriction pattern of the mtDNA which indicated a deletion of 25,000bp. The phenotype of the ethidium bromide induced mutant ER-3 seem to be related to the loss of several essential genes due to a deletion in its mtDNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422117
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  • 6
    Electronic Resource
    Electronic Resource
    A Neurospora DNA polymerase (1978)
    Springer
    Naturwissenschaften 65 (1978), S. 63-64 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00420642
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of cyclic adenosine monophosphate on the growth ofNeurospora crassa (1976)
    Springer
    Naturwissenschaften 63 (1976), S. 485-485 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624588
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  • 8
    Electronic Resource
    Electronic Resource
    DC Electrical Resistivity Study of Granularity in YBa2CU3O7/Ag Composites (1998)
    Springer
    Journal of superconductivity 11 (1998), S. 641-648 
    Details
    ISSN: 1572-9605
    Keywords: Superconductivity ; Ag composites ; percolation ; granularity ; weak-link resistivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Temperature-dependent electrical resistivity in a set of YBa2Cu3O7−x /Ag composites, all prepared under an identical sintering schedule, is analyzed to extract granularity information. The weak-link resistivity ρ wl across the grain boundaries and the percolation factor α arising due to current frustration caused by misalignment of anisotropic grains and sample defects such as voids and cracks are estimated from the residual resistivity ρ0 and the temperature coefficient of resistivity dρ/dT. Variation of these parameters with Ag vol.% quantifying the extent of granularity indicates that granularity in the composites decreases and their electrical characteristics tend to be identical to that of Ag-free YBa2Cu3O7−x single crystals and epitaxial thin films as Ag vol.% approaches a value where onset of current percolation occurs through Ag channels. The increased α and decreased ρ wl observed at higher Ag vol.% explains the larger grains in the composites with narrow size distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022609432697
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  • 9
    Electronic Resource
    Electronic Resource
    Metastability-induced charge and spin fluctuations in 123 type superconductors (1993)
    Springer
    Journal of superconductivity 6 (1993), S. 359-364 
    Details
    ISSN: 1572-9605
    Keywords: Vacancy ordering/disordering ; charge fluctuation ; spin fluctuation ; oxygen coordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Various defects arising from lattice mismatch and coordination incompatibility at the cation sites are known to lend the cuprates a metastable state at temperatures and pressures where they exhibit superconductivity. The present paper considers the metastability induced by coordination incompatibility at Cu(1) sites in oxygen-deficient 123 type systems and looks for their possible effects on charge and spin degrees of freedom. Depending upon the concentration of oxygen vacancies, the resulting unstable charge state at the Cu(1) sites is shown to either temporally fluctuate or spatially equilibrate, providing a mechanism for the 90 K and the 60 K plateaus, with a peak in the former observed in the YBa2Cu3O7-y , samples prepared under thermodynamic equilibrium conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617972
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  • 10
    Electronic Resource
    Electronic Resource
    Formation of YAG from coprecipitated yttrium aluminium hydroxides (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 1701-1708 
    Details
    ISSN: 1572-8943
    Keywords: yttrium aluminium hydroxides ; coprecipitated ; hydroxy garnet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Thermal decomposition of the amorphous coprecipitate of yttrium and aluminium hydroxides forming yttrium aluminium garnet has been investigated employing thermal analyses, X-ray diffraction and IR spectroscopy. On heating, the coprecipitate progressively loses water forming a stable but highly disordered hydroxy garnet which crystallizes at ∼1180 K and decomposes to YAG at ∼1290 K. Nucleation of the crystalline phase appears to begin at ∼800 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01980915
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