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  • 2000-2004  (3)
  • 1995-1999  (7)
  • 1985-1989  (7)
  • 1940-1944  (3)
  • 1910-1914  (4)
  • 1
    Electronic Resource
    Electronic Resource
    A two magnetron sputter deposition chamber for in situ observation of thin film growth by synchrotron radiation scattering (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 3344-3348 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design of a sputter deposition chamber for the in situ study of film growth by synchrotron x-ray diffraction and reflectivity is reported. Four x-ray windows, sealed with low cost, nonhazardous Kapton, enable scattering both in the horizontal as well as in the vertical scattering planes. The chamber fits into a standard six-circle goniometer from Huber which is relatively widespread in synchrotron laboratories. Two miniature magnetron and additional gas inlets allow for the deposition of compound films or multilayers. Substrate heating up to 650 °C and different substrate bias voltage are possible. The performance of the chamber was tested with the deposition of high quality TiN films of different thicknesses. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1384432
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of electron trap states due to InAs quantum dots in GaAs (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 2916-2918 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: InAs quantum dots grown in a GaAs matrix are investigated using capacitive transient spectroscopy and transmission electron microscopy (TEM). Two deep levels are detected which are energetically too deep to be the intrinsic electron levels of the quantum dots. Both TEM as well as the detailed non-exponential behavior of the electron capture indicate that the traps do not result from dislocations in the GaAs matrix. We propose that the measured trap levels are due to point defects in or near the quantum dots. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126516
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  • 3
    Electronic Resource
    Electronic Resource
    CuAu-type ordering in epitaxial CuInS2 films (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 785-787 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ordering of Cu and In atoms in near-stoichiometric CuInS2 epitaxial films grown on Si (111) by molecular beam epitaxy was studied by transmission electron microscopy. Nonchalcopyrite ordering of the metal atoms in CuInS2 is observed, which is identified as CuAu-type ordering. Sharp spots in electron diffraction patterns reveal the ordered Cu and In atom planes alternating along the [001] direction over a long range. High-resolution electron microscopy confirms this ordering. The CuAu-ordered structure coexists with the chalcopyrite ordered structure, in agreement with theoretical prediction. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122001
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  • 4
    Electronic Resource
    Electronic Resource
    Transmission electron microscopy investigation of structural properties of self-assembled CdSe/ZnSe quantum dots (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 1329-1331 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CdSe quantum dots on ZnSe, grown by molecular beam epitaxy and formed during reorganization of an initially uniform film by thermal activation, are microstructurally elucidated in cross section and plan view, using transmission electron microscopy. In diffraction contrast, an almost uniform wetting layer is clearly visible. Dark contrast features with a distinctly larger extension into growth direction mark the location of quantum dots. Individual quantum dots can be identified in high-resolution imaging both by lattice expansion and contrasts arising from their strain fields. Plan-view images show the coexistence of two classes of quantum dots with an average lateral size of ≤10 nm (area density 100 μm−2) and 10–50 nm (20 μm−2), respectively. The shape of the larger entities is pyramidlike. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120984
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  • 5
    Electronic Resource
    Electronic Resource
    Mutation of p53 with loss of heterozygosity in the osteosarcomatous component of a dedifferentiated chondrosarcoma (2000)
    Springer
    Virchows Archiv 436 (2000), S. 494-497 
    Details
    ISSN: 1432-2307
    Keywords: Key words Dedifferentiated chondrosarcoma ; p53 mutation ; p53 LOH
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We investigated a dedifferentiated chondrosarcoma of a 61-year-old woman with an osteosarcomatous high-grade component for p53 alteration. The low-grade cartilaginous and the high-grade osteosarcomatous components of the tumor were macrodissected and evaluated separately by immunohistochemistry and molecular biology. We used PCR-SSCP analysis and direct sequencing to screen exons 4–8 for p53 mutations. The p53 intron 1-polymorphism was investigated for loss of heterozygosity. A functionally relevant p53 missense mutation in codon 193 of exon 6 (A-to-T transversion) with loss of wild-type allele was detected only in the dedifferentiated component. Using the monoclonal antibody DO-1, immunohistochemistry failed to show p53 overexpression. This evidence of p53 mutation may be regarded as at least a co-factor that ”switched” the preexisting low-grade conventional chondrosarcoma to a highly malignant dedifferentiated tumor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004280050478
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen über den Einfluss von Alttuberkulin Koch und Tuberkulin Rosenbach auf die Impftuberkulose des Meerschweinchens (1913)
    Springer
    Lung 27 (1913), S. 21-31 
    Details
    ISSN: 1432-1750
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Schluss Zusammenfassend kann man also als Ergebnis der Untersuchungen folgendes aufstellen: 1. Eine günstige Einwirkung einer Behandlung mit Alttuberkulin, in der Weise wie sie etwa in der Humanmedizin angewendet wird, konnte ich bei der Impftuberkulose des Meerschweinchens ebensowenig wie Haupt und frühere Untersucher beobachten, weder was die Lebensdauer noch was die klinischen und anatomischen Veränderungen betrifft. 2. Behandlung mit ziemlich grossen Dosen Rosenbachschen Tuberkulins scheint in solchen Fällen, die schon an sich zu sehr chronischem Verlauf neigen, noch eine weitere Verlangsamung des Krank heitsablaufes herbeiführen zu können, also immerhin günstig, wenn auch nicht heilend wirken zu können. 3. Beide Mittel werden von den Tieren in grossen Mengen vertragen. Eine immunisierende Wirkung haben beide nicht. Selbstverständlich berechtigt dieses Ergebnis keineswegs dazu, etwa bei der menschlichen Tuberkulose die Versuche mit dem Rosenbachschen Präparat aufzugeben, ebenso wie man ja das Alttuberkulin trotz seiner Unwirksamkeit gegen die Meerschweinchen tuberkulose in der Humanmedizin mit Nutzen verwendet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01866438
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  • 7
    Electronic Resource
    Electronic Resource
    1,1-Dimethyl-3,3,4,4-tetraphenylgermacyclopentane, C30H30Ge (1985)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 912-915 
    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/S0108270185005972
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  • 8
    Electronic Resource
    Electronic Resource
    Interpretation of the shape of electron diffraction spots from small polyhedral crystals by means of the crystal shape amplitude (1988)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 890-897 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The influence of the crystal shape on the fine structure of transmission electron diffraction (TED) patterns described by the crystal shape amplitude is discussed. A general algebraic expression for the crystal shape amplitude of any crystal polyhedron is used for computing the intensity distribution of TED reflections. The computer simulation method is applied to the analysis of the fine structure of TED patterns of small gold and palladium crystals having octahedral and tetrahedral habits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767388005458
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  • 9
    Electronic Resource
    Electronic Resource
    1,3-Di-tert-butyl-2,2-dimethyl-5,8-diphenyl-1,3,5,6,7,8-hexaaza-2-sila-4-germaspiro[3.4]oct-6-ene (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 574-575 
    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/S0108270187011296
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  • 10
    Electronic Resource
    Electronic Resource
    Diphenyl(2,2-diphenylvinyloxy)acetaldehyde (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 374-375 
    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/S0108270187095726
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