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  • Springer  (60)
  • Oxford University Press  (9)
  • Wiley-Blackwell  (8)
  • American Institute of Physics (AIP)  (5)
  • BioMed Central  (2)
  • Blackwell Publishing Ltd  (2)
  • National Academy of Sciences  (2)
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  • American Association for the Advancement of Science (AAAS)
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  • 1995-1999  (57)
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  • 1
    Digitale Medien
    Digitale Medien
    Factors suppressing transport critical current in Ag/Bi2223 tapes (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 7877-7882 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The microstructural factors limiting the critical current density Jc have been investigated for the silver-sheathed Bi2223 tapes prepared by the powder-in-tube technique. In a hierarchy among them, which factor is the most effective in determining Jc depends on how extensively each of them occurs. The Jc was found to increase when the volume fraction of 2223 phase increases, suggesting the importance of the connectivity among 2223 grains. The Jc also increased with decreasing amount of residual carbon. The temperature and magnetic field dependences of Jc indicated characteristics of Josephson currents through superconducting–normal–superconducting barriers. After a discussion based on the alternative current limiting mechanisms proposed up to now, it is suggested that the homophase grain boundary limits the Jc. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.362398
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  • 2
    Digitale Medien
    Digitale Medien
    Ultrahigh resolution of calixarene negative resist in electron beam lithography (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 1297-1299 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A nonpolymer material, calixarene derivative (hexaacetate p-methnylcalix[6]arene) was tested as a high-resolution negative resist under an electron beam lithography process. It showed under 10-mm resolution with little side roughness and high durability to halide plasma etching. A sub-10-nm Ge quantum wire was perfectly etched off without defects. Such a performance is suitable for nanoscale device processes. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.115958
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  • 3
    Digitale Medien
    Digitale Medien
    Sub-10 nm lithography and development properties of inorganic resist by scanning electron beam (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 3064-3066 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We report the self-developing properties of an AlF3-doped LiF inorganic resist under irradiation by a scanning electron beam with an energy of 20–50 keV are reported. The self-development properties strongly depended on both AlF3 concentration and film thickness. To explain this behavior, we presented an exposure model that takes into account a balance between a carbon contamination and a diffusion process. By optimizing resist qualities, we were able to delineate 5 nm linewidth patterns with 60 nm periodicity using a 30 kV electron beam. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.114279
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  • 4
    Digitale Medien
    Digitale Medien
    Kinetics of thermal oxidation of AlAs in water vapor (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 1898-1900 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We have investigated the lateral thermal oxidation of AlAs in water vapor in vertical cavity surface emitting laser structures. At low temperatures and short oxidation times, oxide growth was found to be reaction rate limited. Conversely, diffusion across the oxide was the rate controlling mechanism at higher temperatures and longer oxidation times. Lasers are typically processed at intermediate values of temperatures and time. The observed growth can be modeled by rate equations by which the two component growth mechanisms can be separated. Activation energies of 1.6 and 0.8 eV were determined for the reaction rate and diffusion limited mechanisms, respectively. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.116287
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  • 5
    Digitale Medien
    Digitale Medien
    High-power truncated-inverted-pyramid (AlxGa1−x)0.5In0.5P/GaP light-emitting diodes exhibiting 〉50% external quantum efficiency (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2365-2367 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A truncated-inverted-pyramid (TIP) chip geometry provides substantial improvement in light extraction efficiency over conventional AlGaInP/GaP chips of the same active junction area (∼0.25 mm2). The TIP geometry decreases the mean photon path-length within the crystal, and thus reduces the effects of internal loss mechanisms. By combining this improved device geometry with high-efficiency multiwell active layers, record-level performance for visible-spectrum light-emitting diodes is achieved. Peak efficiencies exceeding 100 lm/W are demonstrated (100 mA dc, 300 K) for orange-emitting (λp∼610 nm) devices, with a peak luminous flux of 60 lumens (350 mA dc, 300 K). In the red wavelength regime (λp∼650 nm), peak external quantum efficiencies of 55% and 60.9% are measured under direct current and pulsed operation, respectively (100 mA, 300 K). © 1999 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.125016
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  • 6
    Digitale Medien
    Digitale Medien
    Immunochemical characterisation and epitope mapping of a novel fimbrial protein (Pg-II fimbria) of Porphyromonas gingivalis (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS immunology and medical microbiology 11 (1995), S. 0 
    Details
    ISSN: 1574-695X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Abstract Mouse monoclonal antibody (mAb) Pgf-II specific for a 72-kDa major cell-surface protein (72K-CSP) derived from Porphyromonas gingivalis OMZ 409 was prepared. Immunoblotting analysis revealed that mAb Pgf-II reacted with 72K-CSP but not with 41-kDa fimbrial subunit protein (41K-fimbrilin) derived from P. gingivalis 381. Electron microscopic observation revealed that P. gingivalis OMZ 409 possessed peritrichous, thin fimbriae on their surface. Immunogold electron microscopy also demonstrated that mAb Pgf-II bound to the 72K-CSP examined with the gold particles arranged along the fibril array originating from the cell surface of the bacteria. These findings suggested that P. gingivalis 72K-CSP was identifiable as another fimbriae (termed Pg-II fimbriae) different from the fimbriae (termed Pg-I fimbriae) composed of a 41K-fimbrilin. Using multipin peptide synthesis technology, 102 sequential overlapping peptides covering the entire 514 amino-acid stretch of Pg-II fimbriae were synthesised. Seven immunodominant regions within Pg-II fimbrial protein molecule, which definitely reacted with the serum of patients with periodontal diseases, were detected.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-695X.1995.tb00122.x
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  • 7
    Digitale Medien
    Digitale Medien
    Evaluation of three individual glucosyltransferases produced by Streptococcus mutans using monoclonal antibodies (1996)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 145 (1996), S. 0 
    Details
    ISSN: 1574-6968
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Abstract We previously established murine hybridomas producing a monoclonal antibody monospecific against three glucosyl-transferases (I, SI and S) of Streptococcus mutans which contribute to dental caries formation. Here, we developed a new immunochemical technique (cross-dot system) with which individual levels of glucosyltransferases expressed by S. mutans can be evaluated. We also examined glucosyltransferase production and in vitro artificial plaque formation by a reference strain and several clinical isolates of S. mutans. The findings indicate that the levels of glucosyltransferases produced greatly vary with the cells and the culture medium, and that the cells producing high levels of both glucosyltransferase-SI and glucosyltransferase-I enzymes may possess high in vitro artificial plaque forming ability. We suggest that the cross-dot system will be useful for estimating the cariogenic potential of S. mutans isolates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6968.1996.tb08611.x
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  • 8
    Digitale Medien
    Digitale Medien
    $l$ -independence of the trace of monodromy (1999)
    Springer
    Mathematische Annalen 315 (1999), S. 321-340 
    Details
    ISSN: 1432-1807
    Schlagwort(e): Mathematics Subject Classification (1991):14F20, 14F30, 14G25
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/PL00004247
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  • 9
    Digitale Medien
    Digitale Medien
    Substrate-assisted laser patterning of indium tin oxide thin films (1999)
    Springer
    Applied physics 69 (1999), S. S875 
    Details
    ISSN: 1432-0630
    Schlagwort(e): PACS: 61.80.Ba; 81.65.Cf
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract. Maskless laser patterning of indium tin oxide (ITO) thin films was studied by the use of a diode-pumped Q-switched Nd:YLF laser. The ITO films were sputter-deposited either on lime glass, the standard substrate material for flat panel display applications, or fused quartz so that the efficiency of laser patterning as a function of substrate absorption could be studied. The laser wavelength was varied among infrared (λ=1047 nm), visible (λ=523 nm), and ultraviolet (λ=349 nm and λ=262 nm). It is observed that strong light absorption by the substrate is a crucial requirement for a residue-free patterning of the ITO film. Observations and numerical calculations of the laser-induced surface temperature indicate that material removal occurs via thermal vaporization and that other mechanisms such as photochemical decomposition or spallation can be neglected.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003390051550
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  • 10
    Digitale Medien
    Digitale Medien
    Collection of trace elements on tin(IV) hydroxide (1974)
    Springer
    Microchimica acta 62 (1974), S. 915-920 
    Details
    ISSN: 1436-5073
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Mikrogrammengen Fe, Co, Cu und Zn können in wäßrigen Lösungen an Zinn(IV)hydroxidniederschlägen bei pH 4–8 zu mehr als 95% angereichert werden. Sn kann als Bromid leicht abgedampft werden. Dieses Trennverfahren wurde zur emissionsspektrographischen Bestimmung geringer ppm-Verunreinigungen in hochgereinigtem Magnesiummetall angewendet.
    Notizen: Summary Microgram quantities of iron, cobalt, copper, and zinc in aqueous solutions can be collected on tin(IV) hydroxide precipitates in greater than 95% yields over the range of pH 4 to 8. Tin is easily removed by evaporation as bromide. This separation technique has been applied to the emission spectrographic determination of low ppm level impurities in high-purity magnesium metal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01218313
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