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  • 1
    Electronic Resource
    Electronic Resource
    Implantation temperature effect on polycrystalline silicon by ion shower doping (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 7114-7117 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a new doping technique using an ion shower doping system with a bucket ion source. Phosphorus atoms were implanted in polycrystalline silicon from room temperature to 300 °C. Sheet resistances were significantly reduced by raising the implantation temperature. With a crystal fraction of 85%, sheet resistance was 5×102 S−1/(D'Alembertian) as implanted. These effects were not due to pure thermal annealing by ion beam heating. A significant improvement was found in sheet resistance as a result of averaging the impurity profile by radiation enhanced diffusion and low temperature recrystallization of the implanted region by collision of atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355026
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  • 2
    Electronic Resource
    Electronic Resource
    Polycrystalline silicon formed by ultrahigh-vacuum sputtering system (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 217-223 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using an ultrahigh-vacuum (UHV) sputtering system, we could grow two new methods of polycrystalline silicon films. The one is as-deposited polycrystalline silicon on glass at substrate temperatures under 500 °C. The other is solid-phase-crystallization by thermal annealing of as-deposited amorphous silicon films in a UHV. As-deposited polycrystalline silicon films were oriented to (220) and grain sizes were determined from half-width of x-ray diffraction to be about 40 nm. From the deposition temperature dependence of the x-ray diffraction peak intensity, the activation energy of the crystalline growth was calculated to be about 0.6 eV. Hydrogen atoms in the sputtering gas lower the reproducibility of as-deposited poly-Si. Polycrystalline silicon films produced by thermal annealing of as-deposited amorphous silicon films at 550 °C in UHV have a (111) orientation. Field-effect mobilities of the as-deposited polycrystalline silicon film and the polycrystalline silicon film by UHV thermal annealing were 5 and 18 cm2/V s, respectively. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360782
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of hydrogen ion shower doping in polycrystalline silicon thin-film transistors (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 31-33 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigated the effect of hydrogen ion shower doping on polycrystalline silicon thin-film transistors (p-Si TFTs). Hydrogen atoms were introduced to the channel region of p-Si TFTs by PH3/H2 ion shower doping of the source/drain contact. Hydrogen concentration in the channel region can be controlled by altering the gate metal thickness. Hydrogen atoms affect the TFT's threshold voltage shifts until it becomes negative, in n-type TFTs. The threshold voltage shift depends on the hydrogen content of the channel region in p-Si TFTs. This is explained by the existence of Si−3 trap states in the grain boundaries. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.114171
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  • 4
    Electronic Resource
    Electronic Resource
    Immunopathology of vitiligo vulgaris, Sutton's leukoderma and melanoma-associated vitiligo in relation to steroid effects (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 11 (1984), S. 0 
    Details
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Microsome, thyroid and DNA tests on patients with generalized vitiligo vulgaris, with or without Sutton's leukoderma, show a high positive rate without thyroid diseases. A small, hut not negligible, amount of IgG and O deposits in the basement-membrane zone and Keratinocytes, has been frequently seen in these diseases by immunohistoogy and immunoelectron microscopy. This evidence strongly suggests an autoimmune character for these diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0560.1984.tb00361.x
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanism of inhibition of IgE-dependent histamine release from rat mast cells by xestobergsterol A from the Okinawan marine spongeXestospongia bergquistia (1993)
    Springer
    Cellular and molecular life sciences 49 (1993), S. 145-149 
    Details
    ISSN: 1420-9071
    Keywords: Xestobergsterol A ; histamine release ; PI-PLC ; IP3 ; signal transduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Histamine release from rat peritoneal mast cells induced by anti-IgE was essentially complete within 4–5 min. Xestobergsterol A and B, which are constituents of the Okinawan marine spongeXestospongia bergquistia Fromont, dose-dependently inhibited anti-IgE-induced histamine release from rat mast cells. The IC50 values of xestobergsterol A and B for histamine release in mast cells activated by anti-IgE were 0.07 and 0.11 μM, respectively. Anti-IgE stimulated PI-PLC activity in a mast cell membrane preparation. Xestobergsterol A dose-dependently inhibited the generation of IP3 and membrane-bound PI-PLC activity. Moreover, xestobergsterol A inhibited Ca2+-mobilization from intracellular Ca2+-stores as well as histamine release in mast cells activated by anti-IgE. On the other hand, xestobergsterol B did not inhibit the membrane-bound and cytosolic PI-PLC activity, IP3 generation or the initial rise in [Ca2+]i in mast cells activated by anti-IgE. These results suggest that the mechanism of inhibition by xestobergsterol A of the initial rise in [Ca2+]i, of the generation of IP3, and of histamine release induced by anti-IgE, was through the inhibition of PI-PLC activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01989419
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  • 6
    Electronic Resource
    Electronic Resource
    Super-active enkephalin analogues (1981)
    Springer
    Naturwissenschaften 68 (1981), S. 210-212 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047210
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  • 7
    Electronic Resource
    Electronic Resource
    Familial amyloidotic polyneuropathy (ATTR Ser50Ile): the first autopsy case report (2000)
    Springer
    Virchows Archiv 436 (2000), S. 345-350 
    Details
    ISSN: 1432-2307
    Keywords: Key words Amyloidosis ; ATTR Ser50Ile ; Autopsy ; Familial amyloidotic polyneuropathy ; Transthyretin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report an autopsy case of a pedigree of familial amyloidotic polyneuropathy (FAP) with a mutation of isoleucine-50 transthyretin (ATTR Ser50Ile). A 47-year-old man started developing severe diarrhea and weight loss at age 41 years, followed by urinary incontinence, autonomic-nervous-system abnormalities and serious heart failure; the diagnosis of FAP (ATTR Ser50Ile) was made on the basis of genetic, histochemical and immunohistochemical analysis. Six years after the initial symptoms, he died of septic shock. Autopsy revealed suppurative peritonitis, perforation of the sigmoid colon and marked systemic amyloid deposition. The total amount of amyloid deposited in the heart was greatly increased and was much lower in the thyroid gland and kidneys compared with amyloid deposits in ordinary FAP (ATTR Val30Met). Amyloid deposition in peripheral vessel walls was prominent, particularly in lymphatics and veins. His elder sister, 54 years old, started to develop orthostatic hypotension at age 49 years, followed by dysesthesia, diarrhea and severe congestive heart failure. Endomyocardial biopsy revealed severe TTR–amyloid deposition; ultrastructural examination demonstrated that amyloid fibrils were deposited disproportionately and extended radially around microvessels. These characteristic patterns of systemic amyloid deposition and distinct clinical manifestations, especially in the cardiovascular system, are considered to be a characteristic feature of ATTR Ser50Ile amyloidosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004280050457
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  • 8
    Electronic Resource
    Electronic Resource
    Inhibitory effect of anti-allergic agent NCO-650 on histamine release induced by various secretagogues (1988)
    Springer
    Inflammation research 25 (1988), S. 17-21 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Histamine release from rat peritoneal mast cells induced by antigen and anti-IgE was essentially complete within 2 min and 3 min, respectively, but that due to Concanavalin A (Con A) was complete only within 9 min. An anti-allergic agent NCO-650 [trans-4-Guanidinomethylcyclohexanecarboxylic acid p-tert-butylphenyl ester hydrochloride], which is a strong inhibitor of trypsin, dose-dependently inhibited anti-IgE-induced histamine release from rat peritoneal mast cells. Moreover, the rate and extent of histamine release from rat peritoneal mast cells induced by various histamine liberators such as antigen, concanavalin A, ionophore A 23187 and compound 48/80 are significantly diminished in samples incubated with NCO-650. The IC50 values of NCO-650 on histamine release induced by antigen, anti-IgE, Concanavalin A, A23187 and compound 48/80 were in the order of micromolar range, i.e. 1.9, 3.6, 4.6, 2.9 and 6.1 μM, respectively. On a molecular basis, NCO-650 is 1000-fold more potent than DSCG, an anti-allergic drug, in inhibiting the antigen-induced histamine release. The present results suggest that the effect of NCO-650 might be due to the inhibition of a common process underlying the release of histamine by various histamine liberators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01969088
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  • 9
    Electronic Resource
    Electronic Resource
    A toxic substance from the sea urchinToxopneustes pileolus induces histamine release from rat peritoneal mast cells (1991)
    Springer
    Inflammation research 32 (1991), S. 224-228 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A toxic substance (P-II fraction), fractionated from the pedicellariae of the sea urchinToxopneustes pileulus, dose-dependently caused the histamine release from rat peritoneal mast cells. The histamine release induced by P-II fraction increased with time, while compound 48/80 caused a more rapid histamine release. The dose-response curve for P-II fraction was studied with concentration 0.03–2.0 mg/ml. This reaction was dependent on Ca2+ and temperature. When glucose (5.5. mM) was omitted during the incubation step, the histamine release induced by P-II fraction was significantly reduced as compared to that of compound 48/80. Pyruvate reversed this reduction. On the other hand, the histamine release induced by P-II fraction was effectively potentiated by the addition of glucose (11.0 mM), but not that by compound 48/80. These results suggest that P-II fraction-induced histamine release differs from that of compound 48/80 disregards to the effects of glucose, because this histamine release appears to be more sensitive to the glycolytic pathway than compound 48/80-induced histamine release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01980878
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  • 10
    Electronic Resource
    Electronic Resource
    The effects of S1319, a novel marine sponge-derived β2-adrenoceptor agonist, on IgE-mediated activation of human cultured mast cells (2000)
    Springer
    Inflammation research 49 (2000), S. 86-94 
    Details
    ISSN: 1420-908X
    Keywords: Key words:β-adrenoceptor agonist — Mast cells — Tryptase — TNF-α— Protein tyrosine phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objective: This study aimed to evaluate the abil-ity of S1319 (4-hydroxy-7-[1-(1-hydroxy-2-methylamino) ethyl]-1,3-benzothiazol-2(3H)-one acetate), a novel β 2-adrenoceptor selective agonist derived from marine sponge, to inhibit IgE-mediated activation of human cultured mast cells (HCMC) in vitro.¶Materials and Methods: We examined the effect of S1319 (racemate) on tryptase release and tumor necrosis factor- α (TNF-α) production in HCMC generated from human cord blood cells, after cross-linking of high affinity immunoglobulin E receptors (FcεRI), compared with those of the non-selective β-adrenoceptor agonist, isoproterenol (R-isomer), the selective β 2-adrenoceptor agonist, salbutamol (racemate), and the selective and long-acting β 2-adrenoceptor agonist, formoterol (racemate). We also evaluated the effect of S1319 on the intracellular cAMP level, inositol phosphate production and protein tyrosine phosphorylation in HCMC.¶Results: S1319 and β-adrenoceptor agonists inhibited the IgE-mediated release of tryptase. Approximate IC50 values of S1319, formoterol, isoproterenol and albuterol for the inhibition of tryptase release were 0.51 ± 0.12, 0.15 ± 0.1, 0.80 ± 0.09, and 28 ± 32.4 nM, respectively. S1319 and β-adrenoceptor agonists also inhibited TNF-α production by HCMC in a concentration-dependent manner. Approximate IC50 values of S1319, formoterol and isoproterenol for the inhibition of TNF-α production were 0.19 ± 0.03, 0.28 ± 0.02 and 0.32 ± 0.03 nM, respectively. S1319 caused a concentration-dependent increase in total cell cyclic AMP levels in HCMC. On the other hand, S1319 inhibited the accumulation of inositol 1,4,5-triphosphate and IgE-mediated protein tyrosine phosphorylation of 42-kDa protein, p42 mitogen activated protein (MAP) kinase (ERK-2).¶Conclusion: These results indicate that S1319 and β-adrenoceptor agonists are potent inhibitors of the IgE-mediated release of mediators from HCMC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000110050563
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