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  • 2000-2004
  • 1995-1999  (7)
  • 1998  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Single-electron transistors fabricated from a doped-Si film in a silicon-on-insulator substrate (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 795-796 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We propose doped-thin-Si-film single-electron transistors (DS-SETs), which are fabricated from a highly doped Si film in a silicon-on-insulator substate by electron-beam lithography with a high-resolution resist (calixarene) and dry etching with CF4 gas. Because the structure can be well controlled, the DS-SET with a 45-nm-diam island shows nearly ideal characteristics of SETs with a charging energy of 1.4 meV. The results demonstrate that single-electron tunneling occurs through a single island without any isolated islands formed in potential fluctuations. We also discuss the discreteness of energy levels in a Si island. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120896
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Calculation of nuclear magnetic shieldings. XII. Relativistic no-pair equation (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 3854-3862 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A Schrödinger-Pauli type two-component perturbation theory has been presented for the calculation of relativistic effects of nuclear magnetic shieldings. The expression for the relativistic nuclear magnetic shieldings are derived from the Douglas-Kroll transformation of the no-pair equation for a molecule, which bears a nuclear magnetic dipole moment, and which is placed in an external magnetic field. The exact form of the relativistic kinetic energy is included in the eigenvalue equation which is solved variationally. We calculated the relativistic mass correction effect on the nuclear magnetic shieldings in the four hydrogen halide molecules, HF, HCl, HBr, and HI, at the coupled Hartree-Fock (CHF) level. It was shown that the mass correction effect increases the nuclear magnetic shieldings of the halogen nuclei. The increments in the shieldings are proportional to about the third power of the atomic numbers of the halogen nuclei. This increase in the shieldings results from the mass correction effect concentrating the electrons in the vicinity of the heavy nucleus, the so-called relativistic contraction. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475788
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Catalytic Si-C bond formation by nucleophilic substitution at silicon by benzyl anions generated over KNH2 loaded on alumina (1998)
    Springer
    Catalysis letters 50 (1998), S. 83-85 
    Details
    ISSN: 1572-879X
    Keywords: solid base ; KNH2 loaded on alumina ; Si-C bond formation ; toluene ; diethylsilane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The catalytic substitution at silicon occurs in the reaction of toluene and diethylsilane in the presence of KNH2 loaded on alumina, the yield of benzyldiethylsilane being 85% in 40 h at 329 K. Benzene also reacted with diethylsilane in the presence of the catalyst to afford a 7.5% yield of benzyl diethylsilane in 20 h at 329 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019006816637
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of angiotensin II and bradykinin on insulin-stimulated tyrosine kinase activity of insulin receptor (1998)
    Springer
    Diabetologia 41 (1998), S. 741-742 
    Details
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250050979
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  • 5
    Electronic Resource
    Electronic Resource
    Anomalous enhancement of DD reaction in Pd and Au/Pd/PdO heterostructure targets under low-energy deuteron bombardment (1998)
    Springer
    JETP letters 68 (1998), S. 823-829 
    Details
    ISSN: 1090-6487
    Keywords: 25.45.−z ; 27.60.+j ; 27.80.+w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Yields of protons emitted in the D+D reaction in Pd, Au/Pd/PdO, Ti, and Au foils are measured by a d E-E counter telescope for bombarding energies between 2.5 and 10 keV. The experimental yields are compared with those predicted from a parametrization of the cross section and stopping power at higher energies. It is found that for Ti and Au target the enhancement of the D(d,p)T reaction is similar to that observed with a deuterium gas target (several tens of eV). The dependence of the yields on the bombarding energy corresponds well to the screening potential parameters U s=250±15 eV for Pd and 601 ±23 eV for Au/Pd/PdO. Possible models of the enhancement obtained are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567800
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  • 6
    Electronic Resource
    Electronic Resource
    Elevation of serum human hepatocyte growth factor (HGF) level in patients with pneumonectomy during a perioperative period (1998)
    Springer
    Intensive care medicine 24 (1998), S. 434-437 
    Details
    ISSN: 1432-1238
    Keywords: Key words Hepatocyte growth factor (HGF) ; Pneumonectomy ; Lung growth ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: Proliferation of alveolar type II cells is thought to be critical for the restoration of lung function after diffuse alveolar damage or pneumonectomy. However, the factors that regulate alveolar type II cell proliferation, and the mechanism that brings about compensatory lung growth are not well understood. Hepatocyte growth factor (HGF) has been shown to have hepatotrophic and nephrotrophic functions for regeneration of the liver and kidney. We have attempted to investigate the involvement of HGF in lung regeneration after lung resection. Desgin: A prospective, controlled study. Setting: Adult surgical patients in a university hospital. Patients and measurements: We measured serum HGF levels in eight patients undergoing major lung resection, and in five patients undergoing mastectomy as controls, by using radioimmunoassay and an enzyme-linked immunosorbent assay. Results: In all cases of pneumonectomy, the serum HGF levels increased 3- to 5-fold at 1–3 days (with a peak at 3 days) after operation, and then decreased to nearly basal levels in 2 weeks. However, these levels in patients undergoing mastectomy did not change much over the first 2 weeks, postoperatively. Conclusions: Serum HGF levels increased in patients after major lung resection, which suggests that HGF might play an important role in lung regeneration or compensatory lung growth in humans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050592
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  • 7
    Electronic Resource
    Electronic Resource
    Immunocytochemical study of lysosomal proteins with a new monoclonal antibody directed against epithelioid macrophages (1998)
    Springer
    Histochemistry and cell biology 109 (1998), S. 223-229 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  A monoclonal antibody, EPI-1, was produced against macrophages in epithelioid granulomas induced in rat foot pads by muramyl dipeptide. This EPI-1 antibody reacted to lysosome-like structures in epithelioid macrophages, peritoneal and pulmonary macrophages, and also in other tissues such as liver, testes, and kidneys. Western blot analysis of epithelioid granulomas, liver, testes, and kidneys revealed the same positive band of 62 kDa. Immunoelectron microscopic study of foot pad granulomas and hepatocytes demonstrated the EPI-1 antigen located in lysosomes and autophagic vesicles, preferentially along their membranes. These findings suggest that the EPI-1 antibody may recognize a novel antigen related to lysosomal membrane proteins in macrophages and other cells, which is useful for identifying lysosomes and their related structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004180050221
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