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  • 1
    Electronic Resource
    Electronic Resource
    Dissociation of the 1.014 eV photoluminescence copper center in silicon crystal (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 3896-3898 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In order to determine dissociation energy of the 1.014 eV photoluminescence (PL) Cu center in silicon crystal, decay of the PL intensity of the center by annealing samples at various temperatures was measured. The samples were prepared by contamination of Cu from Cu solution and heat treatment at 700 °C followed by rapid cooling to room temperature. From the temperature dependence of the time constant of the decay of the PL center, activation energy of dissociation of the center was obtained. The value was 0.47+±0.05 eV, which was much smaller than that (1.02 eV) obtained by the decay of the deep level transient spectroscopy Cu center peak at Ev+0.09 eV. The present value could reasonably explain the rapid thermalization of rearrangement of the centers after the release of stress which had been observed earlier. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122928
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  • 2
    Electronic Resource
    Electronic Resource
    Oxygen participation in the formation of the photoluminescence W center and the center's origin in ion-implanted silicon crystals (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 1347-1349 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The relationship between the photoluminescence (PL) intensity due to the W (or I1) center and the oxygen concentration in implanted silicon crystals was studied. The PL intensity of the W center decreased consistently with increasing oxygen concentration for carbon-implanted samples with a wide range of carbon fluences, while it showed no dependence on the oxygen concentration for samples implanted with elements such as hydrogen, silicon, and heavy metals. Based on these results and considerations of the reactions of intrinsic defects generated by implantation, the origin of the PL W center was attributed to a defect composed of silicon self-interstitials. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120990
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  • 3
    Electronic Resource
    Electronic Resource
    Number of Cu atom(s) in the 1.014 eV photoluminescence copper center and the center's model in silicon crystal (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 2325-2327 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Number of Cu atom(s) in the 1.014 eV copper center in silicon crystal was determined from an accurately measured relationship between the photoluminescence (PL) intensity of the center and Cu concentration in the crystal. For Cu concentrations lower than about 1×1014 atom/cm3, the PL intensity increased linearly with increasing Cu concentration. From this result and the law of mass action, it was concluded that the Cu center had only one Cu atom in it, contradicting the long-believed pair Cu model. Based on already published data and the present result, a structural model in which the Cu atom was bonded at the center of the Si–Si bond was presented for the Cu center. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121811
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  • 4
    Electronic Resource
    Electronic Resource
    Expression of leptin in two-layered culture of gastric mucous cells and fibroblasts: effect of Helicobacter pylori attachment (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 20 (2004), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Our recent histochemical studies have revealed an increase in myofibroblasts and in leptin and its receptor in endothelial cells, and myofibroblasts in Helicobacter pylori-infected human and Mongolian gerbil fundic mucosa.Aim : The present study was undertaken to clarify the H. pylori–induced interaction between leptin in cultured gastric surface mucous cells and fibroblasts.Methods : GSM06 cells were incubated with an air− liquid interface on a collagen gel layer containing mouse fibroblast cell line L929. Medium containing H. pylori bacilli (ATCC43504) at 10–100 times higher concentration than the GSM06 cells was added from the luminal side and the localization of leptin was observed by immunohistochemistry. The transformation of L929 cells to myofibroblasts was detected by electron microscopy and PR 2D3 immunoreactivity.Results : L929 cells in the control group showed a spindle shape with scarce cytoplasm. In the H. pylori-treated group, L929 cells showed features characteristic of myofibroblasts, and most GSM06 and L929 cells showed leptin immunoreactivity. In contrast, L929 cells incubated with H. pylori alone did not undergo this differentiation.Conclusions : Attachment of H. pylori to surface epithelial cells caused conversion of fibroblasts to myofibroblasts. We suggest that leptin plays a role in this transformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2004.01981.x
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  • 5
    Electronic Resource
    Electronic Resource
    Vital role of the itch–scratch response in development of spontaneous dermatitis in NC/Nga 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  The itch sensation and the resultant response, scratching, are important symptoms of atopic dermatitis (AD) and have a significant impact on the quality of life of affected patients. However, the influence of the itch–scratch response on the pathology of AD has not been precisely elucidated.Objectives  To investigate the role of scratching behaviour in the development of spontaneous dermatitis using conventionally raised NC/Nga mice (Conv-NC mice), which are known to be an animal model for human AD.Methods  Capsaicin-sensitive sensory nerves of the mice were ablated by neonatal capsaicin treatment (Cap-NC mice), and the development of spontaneous dermatitis in the Cap-NC mice was compared chronologically with that in Conv-NC mice.Results  Scratching behaviour was almost completely prevented in Cap-NC mice raised for 84 days under conventional conditions, and the development of dermatitis and elevation of the serum IgE level were significantly suppressed. Histological analysis revealed that the numbers of infiltrating eosinophils and mast cells in the lesional skin of Cap-NC mice were lower than those in Conv-NC mice. Immunological studies showed that the capability of spleen T cells to produce both T-helper (Th) 1 (interferon-γ) and Th2 [interleukin (IL)-5 and IL-13] cytokines was diminished in Cap-NC mice. Furthermore, serum levels of IL-18 were approximately twice higher in Conv-NC mice than in Cap-NC mice.Conclusions  These observations suggest that scratching behaviour contributes to the development of dermatitis by enhancing various immunological responses in the murine AD model, implying that prevention of the itch sensation and/or itch-associated scratching behaviour is an effective treatment for AD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.06036.x
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetodynamic Formation of Jets in Accretion Process of Magnetized Mass onto the Central Gravitator — Cases of Forming Stars and Active Galactic Nuclei (1998)
    Springer
    Astrophysics and space science 264 (1998), S. 195-212 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A magnetodynamic model to deal with the acceleration and collimation of jets as a part of the global process of gravitational contraction of the magnetized gas to the central gravitator is discussed. We first review its application to the star forming jet case with several observational supporting evidence. Then, a justification will be given for the extension of this to the AGN jet case, despite of the difference in orders of magnitudes in the scales as well as in the physical parameters. The results of actual application of this magnetodynamic mechanism to the AGN case will be presented together with the discussions for the origin of the radio lobes and hotspots, and we show that this mechanism can explain the enhancement of accretion and the formation of the jet + lobe system consistently with the genetic consideration of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002450221625
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  • 7
    Electronic Resource
    Electronic Resource
    Fluorescence replication banding of frog chromosomes (1997)
    Springer
    Cellular and molecular life sciences 53 (1997), S. 73-77 
    Details
    ISSN: 1420-9071
    Keywords: Key words. Late replication banding; DAPI; actinomycin D; frogs.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. To identify individual chromosomes of a frog karyotype by their fluorescence banding patterns, chromosomes were stained with actinomycin D and 4,6-diamidino-2-phenylindole (DAPI) after incorporation of BrdU during the late S-phase. The chromosomes of three Rana species which were selected for this study (R. ridibunda, R. lessonae and R. japonica) showed well-defined late replication bands. The fluorescence patterns obtained were the reverse of those produced by a 4Na-EDTA Giemsa-staining technique. Fluorescence patterns of the two water frog species (R. ridibunda and R. lessonae) were similar to each other, except for the different fluorescence of the centromeric heterochromatin, which gave extremely bright signals in R. ridibunda but no signal in R. lessonae. Experiments also showed differences between the fluorescence patterns of R. lessonae chromosome 13 in the Italian and Luxembourgian populations. These results sho w that the fluorescence replication banding using actinomycin D and DAPI is very effective in identifying individual frog chromosomes and detecting their structural changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00000582
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  • 8
    Electronic Resource
    Electronic Resource
    Renal length changes with position (1998)
    Springer
    Pediatric radiology 28 (1998), S. 197-197 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002470050332
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  • 9
    Electronic Resource
    Electronic Resource
    A Controlled Atmosphere Cutting Apparatus for Understanding Tribological Behavior of Lubricants in Near-Dry Machining (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 257-258 (Feb. 2004), p. 9-14 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.257-258.9.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Thoracoscopic resection of a ganglioneuroma in the posterior mediastinum of 3-year-old boy (1998)
    Springer
    Pediatric surgery international 14 (1998), S. 151-151 
    Details
    ISSN: 1437-9813
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003830050467
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