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  • 1
    Electronic Resource
    Electronic Resource
    Improvement in the boron doping efficiency of hydrogenated amorphous silicon carbide films using BF3 (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 904-906 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Wide optical gap (2.0 eV) boron-doped hydrogenated amorphous silicon carbide films were prepared by the plasma-assisted chemical vapor deposition technique from a SiH4+CH4+BF3+H2 gas mixture for the first time. The film showed a photoconductivity of 1×10−5 S/cm under 1 sun illumination, which was higher by a factor of 5 than the films doped with B2H6.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100803
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation of highly photoconductive hydrogenated amorphous silicon carbide films with a multiplasma-zone apparatus (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2439-2444 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Highly photoconductive hydrogenated amorphous silicon carbide (a-SiC:H) films were prepared by alternating monolayer deposition and hydrogen passivation by the plasma-assisted chemical vapor deposition technique with a multiplasma-zone apparatus. With this apparatus, the hydrogen-coverage factor of the growing film surface was increased by the hydrogen plasma in the H-passivation zone. The a-SiC:H films grown by repeating deposition of the 3-A(ring)-thick layer on the hydrogen-covered surface showed lower densities of spin and tail states than those of continuously deposited films. Infrared spectra showed that absorption intensities of the carbon polyhydride modes (2890 and 2940 cm−1) decreased and those of the silicon monohydride mode (2000 cm−1) increased with decreasing stacking layer thickness, which suggested formation of a dense network structure. The hydrogen-coverage factor of the growing film surface was estimated from the dependence of carbon content in the film on the hydrogen-passivation time and the stacking layer thickness. Under optimized conditions, the film with a photoconductivity of 3×10−5 S/cm and an optical gap of 1.91 eV was prepared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342813
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  • 3
    Electronic Resource
    Electronic Resource
    Characterization of a-Si1−xCx:H/a-Si:H and a-SiN:H/a-Si:H heterojunctions by photothermal deflection spectroscopy (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2346-2351 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The subgap absorption spectra for hydrogenated amorphous silicon carbide/silicon (a-Si1−x Cx :H/a-Si:H) and silicon nitride/silicon (a-SiN:H/a-Si:H) alternatively multilayered films were measured by photothermal deflection spectroscopy and the defect density at the heterojunction was evaluated from the increase in absorption shoulder with the number of layering periods. The defect density at the a-Si0.66 C0.34 :H/a-Si:H heterojunction increased with increasing a-SiC:H layer thickness, while that at the a-Si0.50N0.50@B:H/a-Si@B:H heterojunction showed no dependence on the a-SiN:H layer thickness and was 1.4×1011 cm−2 . The defect density at the a-Si1−x Cx :H/a-Si:H heterojunction increased to 1×1011 cm−2 with increasing carbon content in the 0.1–0.5 range. Hydrogen dilution of the starting gases of the a-SiC:H layer was effective to decrease the interface defect density to less than 2×1010 cm−2 . A graded composition layer at the a-SiC:H/a-Si:H interface did not decrease the defect density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341050
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of p/i interface layer on dark J-V characteristics and Voc in p-i-n a-Si solar cells (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 3494-3499 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Dark current-voltage (J-V) characteristics of p-i-n a-Si solar cells are studied to clarify the effect of the p/i interface layer on the open-circuit voltage (Voc). It is shown that the recombination current in the p/i interface region is predominant in the a-Si solar cells with an i-layer thickness of less than 200 nm and has a great effect on the dark-current transport in the solar cells. It is also shown that the current transport of the cells with the p/i interface layer of constant band gap of a thickness of more than 14 nm is effectively the same as that of a cell in which the band gap of the whole i layer is equal to that of the interface layer. A model in which the dark current of the cell consists of the recombination current at the p/i interface and the recombination current in the bulk region of the i layer is proposed. Using this model, the Voc degradation for the a-Si solar cells with the p/i interface layer is shown to be due to the defects generated in the i layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345340
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  • 5
    Electronic Resource
    Electronic Resource
    Increase of Peripheral Blood B Cells with Fc Receptor for IgA in Patients with IgA Nephropathy (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 17 (1983), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A B-cell subset with Fc receptors for IgA (Bα cells) has been observed in human peripheral blood. To investigate aberrations of B cells in a diseased state, the percentages of Bα cells were enumerated in peripheral blood from patients with IgA nephropathy, which is characterized by preponderant deposition of IgA-dominant immune complexes in the glomerular mesangial area. The present study showed a significant increase in Bα cells in peripheral blood from patients with IgA nephropathy but not in those with chronic proliferative glomerulo-nephritis without mesangial IgA deposition. Most FcαR-bearing cells were observed in surface IgA bearing lymphocytes. No linear correlation was observed between the levels of serum IgA and the percentages of Bα cells. The addition of aggregated IgA to cultures did not induce FcαR-bearing B cells in vitro. It is postulated that Bα cells might have some pathogenetic role in the development of IgA nephropathy and that some antigenic stimuli might play a role in the increase of peripheral blood Bα cells in patients with IgA nephropathy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1983.tb00810.x
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  • 6
    Electronic Resource
    Electronic Resource
    Anterior cruciate ligament reconstruction augmented with Leeds-Keio polyester mesh in rabbits (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of medicine & science in sports 2 (1992), S. 0 
    Details
    ISSN: 1600-0838
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Sports Science
    Notes: The objective of this study was to compare a nonaugmented autogenous anterior cruciate ligament (ACL) graft with an autogenous graft augmented with Leeds-Keio polyester mesh (L-K mesh) when the augmentation was fixed to bone at both ends or fixed to bone at one end. Twenty-six rabbits were divided into 3 groups (nonaugmented, augmented with one-end fixation and augmented with two-end fixation), and were evaluated 12 weeks postoperatively. The gross findings demonstrated adhesion of the proliferated infrapatellar fat pad to the reconstructed ACL in the autogenous group, but not in the augmentation groups. The microangiographic study revealed poor revascularization in the augmentation groups. Histologically, in the L-K two-end fixation group, the biological segment of the reconstructed ACL remained necrotic. The biomechanical study showed that the augmentation groups were significantly stiffer and stronger than the nonaugmented graft
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0838.1992.tb00333.x
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  • 7
    Electronic Resource
    Electronic Resource
    Epidermal adenylate cyclase system is regulated by diacylglycerol-protein kinase C signal, but not by calcium signal (1990)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 122 (1990), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The breakdown of inositol phospholipids is an important transmembrane signalling system that is composed of two kinds of signals: the diacylglycerol-protein kinase C signal, and the inositol trisphosphate-Ca2+ signal. Using membrane-permeable diacylglycerol, 1-oleoy-2-acetylgly-cerol (OAG), and calcium ionophore, A-23187, the effects of these chemicals on the epidermal adenylate cyclase system were investigated. OAG increased forskolin- and cholera toxin-induced cyclic AMP accumulations, but receptor adenylate cyclase responses were markedly decreased by treatment with OAG. The effects of OAG were inhibited by the protein kinase C inhibitor, H-7. Calcium ionophore, A-23187, had no effect on the epidermal adenylate cyclase responses. Combinations of OAG and A-23187 (as well as the calcium chelator, EGTA), showed that the action of OAG was mostly unaffected by the modulation of intracellular and extracellular Ca2+ concentrations. The results suggest that among the signals triggered by the breakdown of inositol phospholipids, only diacylglycerol-protein kinase C signal is involved in the regulation of the epidermal adenylate cyclase system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1990.tb14722.x
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  • 8
    Electronic Resource
    Electronic Resource
    The roles of costimulatory moleeules CD80 and CD86 in IgA nephropathy (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Nephrology 7 (2002), S. 0 
    Details
    ISSN: 1440-1797
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1797.2002.tb00539.x
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  • 9
    Electronic Resource
    Electronic Resource
    In situ hybridization of connective tissue growth factor mRNA in IgA nephropathy (2001)
    Melbourne, Australia : Blackwell Science Pty
    Nephrology 6 (2001), S. 0 
    Details
    ISSN: 1440-1797
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Connective tissue growth factor (CTGF) is a member of the new family of growth regulators. It plays an important role of the pathogenesis of mesangial matrix accumulation and progressive glomerulosclerosis in IgA nephropathy (IgAN).We investigated the expression and localization of CTGF mRNA in renal tissues of patients with IgAN and normal human kidneys (NHK), using in situ hybridization with digoxigenin-labelled oligonucleotide. Open renal biopsy tissues were obtained from 16 patients with IgAN. The renal pathology was categorized into four grades by light microscopic findings. The expression level of CTGF mRNA was quantified by counting all nuclei, as well as nuclei surrounded by CTGF mRNA-positive cytoplasm in randomly selected non-sclerotic glomeruli and expressing the results as the percentage of total cells.Connective tissue growth factor mRNA was mainly expressed in glomerular mesangial and epithelial cells in both IgAN and NHK, and cells of Bowman’s capsule. In IgAN, CTGF mRNA-positive cells were increased in tubulointerstitial fibrotic areas. The percentage of positive cells for CTGF mRNA was significantly higher in IgAN than in NHK. The percentage of positive cells for CTGF mRNA in each IgAN grade was significantly higher than that in NHK. Furthermore, the percentage of positive cells for CTGF mRNA was significantly greater in IgAN with moderate mesangial proliferative lesions (grade 2, grade 3) than in IgAN with mild mesangial proliferative lesions.Our study suggests that CTGF may play an important role in the development and progression of glomerulosclerosis and tubulointerstitial fibrosis in IgAN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1440-1797.2001.00010.x
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  • 10
    Electronic Resource
    Electronic Resource
    Japanese Society of Nephrology newsletter (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Nephrology 2 (1996), S. 0 
    Details
    ISSN: 1440-1797
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1797.1996.tb00103.x
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