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  • 1990-1994  (11)
  • 1985-1989  (4)
  • 1970-1974  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Characterization of the free-carrier concentrations in doped β-SiC crystals by Raman scattering (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 354-358 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: LO phonon-overdamped plasmon coupled modes in n-type epitaxial films of β-SiC have been measured in the carrier concentration range from 6.9×1016 to 2×1018 cm−3. The carrier concentrations and damping constants are determined by line-shape fitting of the coupled modes and compared with the values derived from Hall measurements. The concentrations obtained from the two methods agree fairly well. The Faust–Henry coefficient determined from the fitting is 0.35. The line-shape analysis of the coupled mode has shown that the dominant scattering mechanisms in β-SiC are deformation-potential and electro-optic mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338830
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Silicon-to-silicon direct bonding method (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 2987-2989 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It was found that strong bonding takes place when a pair of clean, mirror-polished silicon surfaces are contacted at room temperature after hydrophilic surface formation. Bonding strength reaches the fracture strength of silicon bulk after heating above 1000 °C. Electric resistivity at the interface is less than 10−6 Ω/cm2. Bonding p-type silicon to n-type silicon forms a diode. The reaction between silanol groups formed on the surface may cause the bonding force. Heating above 1000 °C was thought to diffuse oxygen to inside the silicon bulk, forming an epitaxial-like lattice continuity at the interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337750
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of the transcriptional activity of the hut promoter in Bacillus subtilis and identification of a cis-acting regulatory region associated with catabolite repression downstream from the site of transcription (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 6 (1992), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Levels of transcripts initiated at a hut promoter in Bacillus subtilis were analysed. The addition of histidine to the culture medium increased the level of the transcript sixfold. In the presence of histidine and glucose together, the level of the transcript was reduced to the level in the absence of Induction. Furthermore, addition of a mixture of 16 amino acids to cultures of induced cells and of catabolite-repressed cells decreased levels of the transcript 16-fold and 2.6-fold, respectively. Thus, it appears that at least three regulatory mechanisms associated with induction, catabolite repression, and amino acid repression, control the transcriptional activity of the hut promoter. Expression of the hut promoter–lacZ fusions that contained various regions of the hutP gene and deletion analysis of the hutP region revealed a cis-acting sequence associated with catabolite repression that was located between positions +204 and +231 or around position +203.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1992.tb01434.x
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  • 4
    Electronic Resource
    Electronic Resource
    SINGLET OXYGEN FROM DISCHARGE-FLOW SYSTEMS (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 171 (1970), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1970.tb39322.x
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  • 5
    Electronic Resource
    Electronic Resource
    B Lymphoblasts show Oxidase Activity in Response to Cross-Linking of Surface IgM and HLA-DR (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 35 (1992), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human B lymphocytes express components of the superoxide generating system of phagocytes, NADPH oxidase. We studied regulation of this ‘B-cell oxidase’ during in vitro blast transformation, using Lucigenin-amplified chemiluminescence (CL) to detect superoxide release. While freshly isolated tonsil B lymphocytes showed no CL responses, culture with phorbol myristate acetate (PMA) and ionomycin induced susceptibility to CL triggering by anti-IgM and anti-HLA-DR. Maximal effects were observed after 3 days of culture with 0.4 ng/ml PMA+1μg/ml ionomycin. Cells from such B lymphoblast cultures showed no CL responses to opsonized zymosan. In contrast, peripheral blood mononuclear cells, where monocytes are the predominant oxidant source, showed CL responses to opsonized zymosan but not to anti-IgM and anti-HLA-DR, either before or afterculture with PMA+ionomycin.Culture of B cells with the surface immunoglobulin cross-linking agent staphylococcus aureus Cowan 1 also led to emergence of a CL response to anti-IgM, which was enhanced by interferon-γ. Interestingly, markedly fewer B blasts than freshly isolated B lymphocytes expressed cytochrome b-558 surface antigen. Thus, the B-cell oxidase is up-regulated during blast transformation and can be triggered via surface IgM and HLA-DR; however, this appears to be restricted to a subset of B lymphoblasts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1992.tb03255.x
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  • 6
    Electronic Resource
    Electronic Resource
    GD2 Ganglioside-Specific Monoclonal Antibody Reacts with Murine Cytotoxic T Lymphocytes Reactive with FBL-3N Erythroleukaemia (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 40 (1994), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Ganglioside expression on cytotoxic T lymphocytes induced against the mouse erythroleukaemia line FBL-3N, was analysed, compared with that of naive T lymphocytes in the thymus, lymph nodes and spleen. Although normal uncultured and cultured T lymphocytes expressed no GD2, GD3 or GM2 gangliosides, cytotoxic T cells with CD4+ CD8−, CD4−CD8+, and CD4−CD8− phenotypes reacted with anti-GD2 monoclonal antibody with various intensities. The reactivity with anti-GD2 was associated with the intensity of cytotoxic activity as analysed using cytotoxic T lymphocyte (CTL) clones established from the bulk CTLs of each phenotype. An increase of the mRNA expression of GM2/GD2 synthase gene was demonstrated by Northern blot hybridization using RNA extracted from thymocytes, spleen cells, Con A-treated spleen cells and various types of CTL cells. These results indicated that GD2 ganglioside expression might be associated with the functional differentiation of murine T lymphocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1994.tb03504.x
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  • 7
    Electronic Resource
    Electronic Resource
    A plasmid vector for an extreme thermophile, Thermus thermophilus (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 72 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The host-vector system for an extreme thermophile, Thermus thermophilus HB27, was developed. The host strain has a mutation in tryptophan synthetase gene (trpB), and the mutation was determined to be a missense mutation by DNA sequence analysis. A Thermus-E. coli shuttle vector pYK109 was constructed. pYK109 consists of Thermus cryptic plasmid pTT8, tryptophan synthetase gene (trpB) of Thermus T2 and E. coli plasmid vector pUC13. pYK109 transformed T. thermophilus HB27 trpB5 to Trp to a frequency of 106 transformants per μg DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb03869.x
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  • 8
    Electronic Resource
    Electronic Resource
    1,2-Benzisoxazole-3-acetamidoxime hydrochloride, a new psychotropic agent (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 405-405 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Le PF-257 ou chlorhydrate de benzisoxalzole-1,2 acétamidoxime-3 produit des effets variés sur le système nerveux central des animaux. Le profil pharmacologique et l'action fondamentale de cet agent paraissent nouveaux, comparés à ceux des psychotropiques actuels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921689
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  • 9
    Electronic Resource
    Electronic Resource
    Measurement of acetabular angle using ultrasound (1993)
    Springer
    Archives of orthopaedic and trauma surgery 112 (1993), S. 131-133 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have developed a method of measuring the acetabular angle by using ultrasound. Normal acetabular roofs are delineated as curvilinial hyperechoic lines on the screen, whereas in displastic hips the outlines of the acetabular roofs are shallower and more vertical. The values of 150 acetabular angles of 75 babies measured by ultrasound were in reasonably good agreement with those derived from roentgenography. This is a safe, handy, and effective for measuring the acetabular angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00449988
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  • 10
    Electronic Resource
    Electronic Resource
    Nucleation process of stacking fault tetrahedra in gold studied by positron lifetime spectroscopy (1985)
    Springer
    Applied physics 37 (1985), S. 65-72 
    Details
    ISSN: 1432-0630
    Keywords: 61.70 ; 78.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract By component analyses of positron lifetime spectra in quenched gold, it was found that positrons are strongly trapped by stacking fault tetrahedra (SFT) at which the lifetime is about 160 ps remarkably smaller than that for monovacancies (∼200 ps) or divacancies (∼220 ps). Positron lifetimes at small vacancy clusters were also estimated in relation to the nucleation process of SFT, with the aid of computer simulation of kinetics of vacancy clustering during quenching and on subsequent isochronal annealing. The results show that large atomic relaxation occurs in small vacancy clusters among which pentavacancies have the largest open-space, thereby having the lifetime of about 230 ps larger than that of trior tetra-vacancies (∼160ps). It is also suggested that tetra- and penta-vacancies act as prenuclei for stable nuclei of SFT consisting of six or more vacancies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618855
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