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  • 2000-2004  (6)
  • 1990-1994  (5)
  • 1975-1979  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    One-phonon Raman scattering studies of chains of crystalline-Si nanospheres (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 3232-3235 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Chains of crystalline-Si nanospheres were studied by means of Raman scattering spectroscopy. We found that the one-phonon Raman scattering peak from the chains was asymmetric and broader than that from bulk Si. This phenomenon can be attributed to a phonon confinement in the silicon nanospheres. The phonon confinement became more obvious by decreasing the size of the silicon nanospheres in the chains. We also found that the Si nanospheres in the chains were under compressive stress by the covering oxide layers through the analysis of the Raman shift. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1446222
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  • 2
    Electronic Resource
    Electronic Resource
    Ocean Bottom Seismographs used in a crustal study of an area covered with flood-basalt off Lofoten, N. Norway (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Terra nova 5 (1993), S. 0 
    Details
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Seismic refraction measurements were made in August 1988 to study the crustal structure off Lofoten, Northern Norway. Twenty-four 3-component Ocean Bottom Seismographs (OBS) were used, of which seven were deployed in the area covered by landward-flowing basalt deposited during the early Eocene break-up between Norway and Greenland. The main purpose of the OBS survey was to investigate whether this method can be used to map structures below the basalt, which is not easy to penetrate with conventional seismic reflection techniques. The records obtained showed that the OBS data contain considerable information about structures below the flood-basalt; preopening sediments up to 4.0 km thick is indicated below the 1.0–2.5 km-thick landward-flowing basalt. The success of the OBS survey indicates that such measurements can become an important tool in investigations on passive volcanic margins and, potentially, in other areas where highly reflective boundaries make the reflection technique difficult to apply.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3121.1993.tb00228.x
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  • 3
    Electronic Resource
    Electronic Resource
    Crustal and upper mantle structure in the Ryukyu Island Arc deduced from deep seismic sounding (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 102 (1990), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In 1984 an extensive geophysical investigation was conducted in the northernmost part of the Ryukyu Island Arc, south of Kyushu Island. Japan. The aim of this investigation was to obtain new information on the nature of crust and upper mantle at the continental margin through various geophysical measurements (seismic profiling, gravity, magnetism, sea beam and heat flow).This paper presents the crust and upper mantle structure deduced from ocean bottom seismographic profiling conducted along two lines. One line, 190 km long, was taken behind the northernmost part of the Ryukyu Island Arc, parallel to the major tectonic units, i.e. the Okinawa Trough, Ryukyu Arc and Ryukyu Trench. The other, 295 km long, was perpendicular to the tectonic units. Along these profiles, we deployed ocean bottom seismograms spaced 10-20 km apart. As a controlled source, we used both explosives and an airgun array. The experiment was successful and provided quite important information on the tectonics of a trench-island arc-back arc system.The velocity structure obtained for the profile behind the Ryukyu Islands has continental properties. The sediment thickness is 3-4 km. although it shows lateral variations due to basement undulation. The velocities of the upper and lower crust are 5.8-6.2 and 6.6-6.8 km s-1, respectively. The total crustal thickness decreases southwestward, from 27-30 to 23-24 km. This is direct evidence for crustal thinning associated with the process of back-arc spreading.The velocity structure along the profile from the trench to the island arc clearly shows the subduction, accretion and deformation at this margin. The crust beneath the trench has oceanic properties. The sediment thickness is 1.3-3.0 km, beneath which the igneous basement shows severe undulation. The total crustal thickness is 7-8 km. The Pn velocity is slightly less than 8.0 km s-1. Our seismic data revealed a huge sedimentary wedge located 50-150 km landward of the trench. The maximum thickness of this wedge exceeds 12 km. The origin of this wedge may be oceanic because the P-wave velocity in its eastern half is almost comparable to that obtained for the trench area. The velocity structure landward of the wedge is continental and similar to that obtained for the profile behind the island arc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1990.tb04587.x
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  • 4
    Electronic Resource
    Electronic Resource
    Crustal Structure Beneath Lofoten, N. Norway, From Vertical Incidence and Wide-Angle Seismic Data (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 114 (1993), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A high-quality multichannel seismic reflection line was acquired in 1987 along a 175 km long profile across the continental shelf off Lofoten, northern Norway. A seismic wide-angle experiment was performed in 1988 along the same profile, using seven three-component Ocean Bottom Seismographs (OBS) with 20-25 km spacing and shotpoint intervals of 240 m.The study of the data has shown that the combination of the multichannel reflection and the wide-angle (OBS) technique provides information about the crustal structure beneath the Lofoten shelf that could not have been achieved using only one of the techniques. the multichannel reflection data provide a detailed image of the shallow (Cretaceous) structures, which represents an important basis for inversion of the OBS data. the lower crust and the Moho are also well mapped in some parts of the area with the multichannel reflection technique.The OBS data reveal that significant amounts of pre-Cretaceous sediments exist along almost the entire profile, with a maximum thickness of about 5 km in the Vestfjorden Basin. From the OBS data the thickness of the lower crust is inferred to decrease from about 11.5 km under the Røst High to about 2 km below the Lofoten Ridge. the OBS data indicate further that the Moho position under the Vestfjorden Basin is considerably deeper than can be inferred from the reflection data.About 10km below Moho a strong dipping event is observed in the OBS data. This upper mantle reflection might be related to a possible seaward dipping master fault, and/or presence of layers of partially hydrated peridotite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1993.tb01471.x
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  • 5
    Electronic Resource
    Electronic Resource
    A mouse model of pemphigus vulgaris by adoptive transfer of naive splenocytes from desmoglein 3 knockout mice (2004)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 151 (2004), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Pemphigus vulgaris (PV) is an autoimmune blistering disease caused by antidesmoglein3 (anti-Dsg3) IgG autoantibodies. Recently, we developed a PV mouse model by adoptive transfer of splenocytes from recombinant Dsg3-immunized Dsg3–/– mice to Rag2–/– immunodeficient mice that expressed Dsg3.Objectives  We determined whether the adoptive transfer of naive splenocytes from nonimmunized Dsg3–/– mice induces the anti-Dsg3 IgG production and the PV phenoytpe in recipient mice.Methods  We adoptively transferred naive Dsg3–/– splenocytes into Rag2–/– mice and compared their PV phenoytpe with those mice receiving immunized Dsg3–/– splenocytes. The numbers of splenocytes and their subpopulations required for anti-Dsg3 IgG production were examined.Results  Mice that received naive Dsg3–/– splenocytes produced anti-Dsg3 IgG, which bound to keratinocyte cell surfaces in vivo, and developed the PV phenotype, including oral erosions with suprabasilar acantholysis. Antibody production and the appearance of the PV phenotype were delayed by approximately 2 weeks in mice that received naive splenocytes compared with mice that received immunized splenocytes. However, once the PV phenotypes developed, there were no apparent differences in disease severity between the two models. Interestingly, the anti-Dsg3 IgG titres were significantly lower in mice that received naive splenocytes than in mice that received immunized splenocytes, suggesting that the former antibodies were more potent than the latter. The frequency of anti-Dsg3 IgG production depended on the number of transferred naive splenocytes. Both CD4+ T cells and B220+ B cells from naive Dsg3–/– mice were essential for the production of anti-Dsg3 IgG antibodies.Conclusions  Dsg3-specific naive lymphocytes in Dsg3–/– mice can be primed and activated by the endogenous Dsg3 in recipient mice to produce pathogenic anti-Dsg3 IgG without active immunization. This approach using naive lymphocytes provides a unique model to dissect immunological mechanisms of tolerance against peripheral autoimmune targets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.06056.x
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  • 6
    Electronic Resource
    Electronic Resource
    Probing bulk states of correlated electron systems by high-resolution resonance photoemission (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 403 (2000), S. 396-398 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Electron correlations are known to play an important role in determining the unusual physical properties of a variety of compounds. Such properties include high-temperature superconductivity, heavy fermion behaviour and metal-to-insulator transitions. High-resolution photoelectron spectroscopy ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35000140
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of a Functional Null Cell Line Derived from (NZB × NZW)F1 Mice (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: We attempted to establish a null cell line from NZBxNZW(B/W)Fl mice in order to investigate a regulatory role of null cells during polyclonal B cell activation in autoimmune diseases. NB2.2, a representative subclone of resulting null cell lines, was maintained in long-term tissue culture with 10% mouse ConA supernatant (MCAS). Interestingly, the cell free supernatant of the NB2.2 cells (NB-CFS) showed marked synergistic effects on IgM secretion by B cells induced by IL-5. In addition, NB-CFS had the ability to augment the production of autoantibodies against bromelain-treated mouse red blood cells (BrMRBC) and single-stranded DNA (ssDNA) by B cells induced by IL-5. To determine whether NB2.2 cells induce polyclonal B cell activation and autoantibody generation in vivo, BALB/c mice were injected with NB2.2 cells. The results showed that the level of anti-ssDNA antibodies in sera of BALB/c mice injected with NB2.2 cells was significantly higher than that of control BALB/c mice injected with FDC-P2 cells. In addition, splenic B cells from mice injected with NB2.2 cells significantly proliferated in vitro in response to IL-4 and IL-5, and produced anti-ssDNA antibodies in the presence of IL-5. These results suggest that NB2.2, a null cell line established from B/WF1 mice, produces mediators capable of promoting polyclonal B cell activation and inducing autoantibody secretion, and that this kind of null cell may play an important role in the pathogenesis of autoimmune diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1994.tb03522.x
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  • 8
    Electronic Resource
    Electronic Resource
    High-resolution soft X-ray absorption spectroscopy of solids (2001)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 8 (2001), S. 339-341 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The present research deals with the high-resolution soft x-ray absorption spectra (XAS) of Si, Ce- and Sm- compounds measured at BL25SU of SPring-8. The spectra are compared with theoretical results. The Si 1s spectrum shows good agreement with the calculated empty density of states so far reported. The Ce 3d spectra are very sensitive to the local electronic structure. The Sm 3d XAS of SmS shows clear temperature dependence, which is partly explained by a calculation for Sm2+ ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0909049500015016
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  • 9
    Electronic Resource
    Electronic Resource
    A new synthesis ofβ-fluoroaspartic acid (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 850-851 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary β-Fluoroaspartic acid, a new amino acid, was synthesized by a diazotization of diaminosuccinic acid in liquid hydrogen fluoride.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01955104
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular dynamics study of adhesion strength and diffusion at interfaces between interconnect materials and underlay materials (2000)
    Springer
    Computational mechanics 25 (2000), S. 78-86 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A molecular-dynamics technique for determining the adhesion strength and analyzing diffusion at interfaces between different materials has been developed. The adhesion strength is determined by calculating the adhesive fracture energy defined as the difference between the total potential energy of the material-connected state and that of the material-separated state. This technique is used to determine the adhesion strength and analyze diffusion at the interfaces between Cu films and high-melting-point materials that are used as underlay materials for Cu interconnects in ULSIs. The adhesive fracture energy shows that the adhesion strength of the Cu/Ru and Cu/Ir interfaces is much higher than that of the Cu/W, Cu/TiN, and Cu/Ta interfaces. Because the diffusion of Cu atoms at the Cu/Ru and Cu/Ir interfaces is suppressed, the surface smoothness of Cu films on Ru and Ir is much better than that on W, TiN, and Ta. It is also found that adhesion strength and smoothness increase with decreasing lattice mismatch between Cu and the underlay material. These results are confirmed by SEM (scanning electron microscope) and scratch testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050017
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