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  • 1995-1999  (6)
  • 1970-1974  (1)
  • 1999  (6)
  • 1974  (1)
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Years
  • 1995-1999  (6)
  • 1970-1974  (1)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Single crystalline ZnO films grown on lattice-matched ScAlMgO4(0001) substrates (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2635-2637 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Lattice-matched (Δa/a=0.09%) ScAlMgO4(0001) substrates were employed to grow single crystalline quality ZnO films by laser molecular-beam epitaxy. Extremely smooth surface represented by atomically flat terraces and half unit cell (0.26 nm) high steps and extremely small orientation fluctuations both in-plane (〈0.02°) and out-of-plane (〈0.01°) are achieved. The films have high mobility (∼100 cm2/V s) together with low residual carrier concentration (∼1015 cm−3). Excellent optical properties, including a clear doublet of A and B exciton peaks in absorption spectra, were also observed. These features could not be simultaneously achieved for ZnO films grown on sapphire(0001) having a large lattice mismatch (Δa/a=18%). © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125102
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  • 2
    Electronic Resource
    Electronic Resource
    XANES study of the electronic structure of molten germanium (1999)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 6 (1999), S. 540-542 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0909049598015957
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Excess Thermal Expansion Factors of Polar Mixtures and Aqueous Solutions (1999)
    Springer
    Journal of thermal analysis and calorimetry 57 (1999), S. 759-763 
    Details
    ISSN: 1572-8943
    Keywords: aqueous solution ; excess thermal expansion factor ; polar mixture ; the cross entropyvolume fluctuation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Excess thermal expansion factor of non-polar mixtures is the order of 10−6 K−1 and within an experimental error. On the other hand, those of polar mixtures and aqueous solutions are very large and the order of 10–5 K−1, up to the order of 10−4 K−1 in an extreme case. The excess thermal expansion factors express well the excesses of entropy volume cross fluctuation and enthalpy volume cross fluctuation estimated from thermal expansion factor and molar volume. Those of aqueous solutions are, however, reduced by small molar volume of water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010173604826
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    DTA von Polymer-Lösungsmittel-Systemen. 2. Mitt (1974)
    Springer
    Colloid & polymer science 252 (1974), S. 185-185 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , 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/BF01555681
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  • 5
    Electronic Resource
    Electronic Resource
    Reaction of LaCl3 with dipivaloylmethane in gas phase (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 240 (1999), S. 53-57 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The complex formation of LaCl3 with dipivaloylmethane (dpm) was investigated in a view of the applicability to a rapid chemistry. It was found that the complex formation of lanthanum chloride with dpm in a gas phase was recognized and a volatile LaCl2 (dpm) which was formed by substitution of a chloride atom in LaCl3 by dpm molecule was mainly produced. A temperature dependence of LaCl2 (dpm) formation was examined and the activation energy of the reaction was deduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349136
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  • 6
    Electronic Resource
    Electronic Resource
    Solvent extraction of technetium(VII) by cyclic amides (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 377-380 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction behavior of heptavalent technetium with cyclic amides inn-dodecane from nitric acid solution was studied. The amides investigated are N-(2-ethyl)hexylbutyrolactam(EHBLA). N-(2-ethyl)hexylvalerolactam(EHVLA), N-(2-ethyl)hexyl-caprolactam (EHCLA), N-octylcaprolactam(OCLA), a mixture of 3-octyl-N-(2-ethyl)hexylvalerolactam and 4-octyl-N-(2-ethyl)hexylvalerolactam (3,4,OEHVLA), 2-octyl-N-(2-ethyl)hexylcaprolactam(2OEHCLA), a mixture of 3-octyl-N-(2-ethyl)hexylcaprolactam and 5-octyl-N-(2-ethyl)hexylcaprolactam(3,5,OEHCLA) and that of 3-octyl-N-octylcaprolactam and 5-octyl-N-octylcaprolactam(3,5,OOCLA). From the results of the distribution ratio of Tc(VII) as a function of acid concentration, cyclic amides concentration and HTcO4 concentration, the effects of both the ring size of cyclic amide and structure of the substituents attached to different positions of the cyclic ring on the extraction behavior of Tc(VII) were discussed. A clear steric hindrance was observed. For applications, 3,4,OEHVLA is proposed as the best extractant for Tc from acidic solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349515
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  • 7
    Electronic Resource
    Electronic Resource
    Study on the extraction of trivalent lanthanide ions with N,N′-dimethyl-N,N′-diphenyl-malonamide and diglycolamide (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 381-384 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction of trivalent lanthanide (Ln(III) ions with two diamides: (1) N,N′-dimethyl-N,N′-diphenyl-malonamide (MA) and (2) N,N′-dimethyl-N,N′-diphenyl-diglycolamide (DGA) from nitric acid solution was studied. Chemical bond properties of extracted complexes were investigated by UV-VIS and FT-IR spectroscopies. The chemical bond strength between Ln(III) ions and the ligands in extracted complexes was closely related with the magnitude of the distribution ratios of Ln(III) ions: the extracted complex having a stronger bond between Ln(III) ion and the ligand showed a higher magnitude of the distribution ratio of Ln(III) ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349516
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