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  • 1
    Electronic Resource
    Electronic Resource
    Effect of degree of amorphization of Si on the formation of titanium silicide (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 2842-2846 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The mechanisms of the formation of titanium silicide from the reaction of a single thin film of Ti on the silicon substrate with different degrees of substrate amorphization were studied using differential scanning calorimetry. With increased amorphization, an exothermic reaction prior to C49-TiSi2 formation was observed. X-ray diffraction discovered an unidentified phase together with Ti5Si3 and Ti5Si4 that disappeared with subsequent formation of C49-TiSi2 at temperatures above 650 °C. The difference in Gibbs free energy was considered in explaining the formation of Ti5Si3 and Ti5Si4. Based on the Scherrer equation, the resultant C49-TiSi2 grains with higher degrees of silicon substrate amorphization were smaller than those without silicon substrate amorphization. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1432768
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  • 2
    Electronic Resource
    Electronic Resource
    Perspectives on Genetics in China (1995)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 29 (1995), S. 1-20 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.29.120195.000245
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of polyunsaturated phosphatidyl choline in the treatment of acute viral hepatitis (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 9 (1995), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Polyunsaturated phosphatidyl choline is a preparation often advocated for diseases of the liver. Methods: In a randomized open controlled trial, a preparation of polyunsaturated phosphatidyl choline, at a dose of 900 mg orally daily, was given to 22 patients with acute viral hepatitis. A control group of 25 patients was not treated. Results: Serial serum bilirubin and alanine amino transferase levels were measured up to 12 weeks. The falls in their levels after 2 and 5 weeks, and the lengths of time to their normalization, were not significantly different in the treated group compared to the control group. Conclusion: The results indicated that polyunsaturated phosphatidyl choline had no beneficial effect on the course of acute viral hepatitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.1995.tb00441.x
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  • 4
    Electronic Resource
    Electronic Resource
    Treatment of hepatitis B surface antigen carriers in the early stage of the infection using recombinant alpha-interferon with steroid priming (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 9 (1995), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Alpha-interferon has been found to inhibit hepatitis B virus (HBV) replication in Chinese patients with chronic HBV infection although a sustained effect was rarely achieved in those with normal pre-treatment serum alanine amino transferase (ALT) levels. Prednisolone priming has been found to be beneficial over treatment with interferon alone in these subjects. We studied the effect of steroid pre-treatment followed by recombinant interferon alpha-2a in the treatment of asymptomatic HBV carriers with positive hepatitis Be antigen (HBeAg), hepatitis B viral DNA (HBV-DNA) and minimal changes in liver histology. Methods: The treatment regimen included a 6-week prednisolone priming, a 2 week rest followed by 14 weeks of three times weekly 9 mega units of interferon alpha-2a injection and 52 weeks of follow-up. There were seven patients in the treatment group and seven controls. Results: The mean age, pre-treatment ALT (normal in all except for one in each of the treatment and control groups), HBV-DNA levels and histological scores were similar in the two groups. Serum HBV-DNA levels fell in six patients during treatment and became undetectable in two of them by the end. During follow-up, serum HBV-DNA returned to pre-treatment levels in all patients. None of the treated patients had HBeAg sero-conversion and none of the controls had spontaneous clearance of HBV-DNA or sero-conversion of HBeAg. No improvement of liver histology was observed in any of the treated patients. There were only mild flu-like side-effects noted and interferon alpha-2a was well tolerated at the doses given among treated patients. Conclusion: Prednisolone priming followed by interferon alpha-2a treatment has no beneficial effect on HBV carriers in the early stages of chronic hepatitis B infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.1995.tb00417.x
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  • 5
    Electronic Resource
    Electronic Resource
    Erythropoietin-producing Cells in Transgenic Mice Expressing SV40 Large T Antigen Directed by Erythropoietin Control Sequences (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 718 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb55739.x
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  • 6
    Electronic Resource
    Electronic Resource
    Der direkte nachweis eines aromatischen diazonium-carboxylats als zwischenstufe des nitroso-acyl-arylamin-zerfalls.
    Amsterdam : Elsevier
    Tetrahedron Letters 9 (1968), S. 4019-4022 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)76309-X
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  • 7
    Electronic Resource
    Electronic Resource
    Production of Erythropoietin by Liver Cells in Vivo and in Vitro (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 718 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb55703.x
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of epitaxic-layer composition and thickness by double-crystal X-ray diffraction (1989)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 22 (1989), S. 269-276 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Double-crystal X-ray diffraction rocking curves can be used to evaluate composition and thickness of epitaxic layers. In order to assess the limits of this technique, the 004 rocking curves of molecular-beam epitaxy- (MBE) grown coherent AlGaAs/GaAs epitaxic layers have been measured. The composition was calculated both by using theoretical values for the lattice parameters of the limiting compositions together with Vegard's law and also by using an epitaxic layer of AlAs as an in situ standard. The accuracy of this concentration measurement is evaluated by comparing it with an independent measurement of the composition. MBE-grown AlxGa1 − xAs (x = 0.3, 0.5, 0.7) epitaxic layers in the thickness range 0.2–6.0 μm were used to investigate the usefulness of the X-ray rocking-curve method for layer thickness measurement. The experimental rocking curves are compared with those generated from computer simulations based on X-ray dynamical scattering theory. In the thickness range 0.5–2.0 μm Bragg-geometry Pendellösung fringes are also observed. The layer thicknesses calculated from the integrated intensity ratios and the fringe spacings agree with layer thicknesses obtained from scanning electron microscope (SEM) sections. The applicability of this method to multiple layers is investigated using test structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889888014773
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of nitrogen-mustard on Sea-Urchin Eggs (1949)
    Springer
    Cellular and molecular life sciences 5 (1949), S. 164-166 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Es wurde die Wirkung des Stickstoffsenfgases, Methyl-β-(dichloräthyl)-amino-HCl, auf befruchtete und unbefruchtete Eier der SeeigelArbacia lixula undSphaerechinus granularis untersucht. Die Furchungshemmung und das Stadium, bei dem die Entwicklung aufhört, hängen von der Konzentration der verwendeten Substanzen und von der Dauer der Behandlung ab.Vor der Besamung behandelte Eier zeigten eine ausgesprochenere Reaktion als diejenigen, die nach der Besamung behandelt wurden; auch bildeten die ersteren bei höheren Konzentrationen abnorme Befruchtungsmembranen. Die Eier, welchenach der Besamung behandelt wurden, zeigten ein fortschreitendes Abnehmen in der Reaktion auf die Substanz, und zwar in dem Verhältnis, in dem der Zeitabstand zwischen Besamung und Behandlung zunahm. Die Verzögerung der Entwicklung ist in Eiern, die sofort nach der Befruchtung behandelt worden waren, am größten; bei diesen ist der Prozentsatz der Eier, die eine normale Befruchtungsmembran bilden, stark reduziert; sehr häufig tritt eine Polyspermie ein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02174434
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  • 10
    Electronic Resource
    Electronic Resource
    A Frequency-Dependent Direct Adaptive Scheme for Robot Manipulators: A Case of Model-Following Motion Control (1998)
    Springer
    Journal of intelligent and robotic systems 22 (1998), S. 1-22 
    Details
    ISSN: 1573-0409
    Keywords: adaptive control ; model-following control ; dynamic systems ; robot manipulators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents a new frequency-dependent direct adaptive scheme for the optimal and/or suboptimal tracking of the motion of a prescribed model. The idea is based on a closed-loop control scheme in which an 2 H optimal/suboptimal controller is applied in parallel with a direct adaptive technique to guide a robot manipulator to follow a certain prescribed trajectory. The H 2 compensators have to be proper and positively bounded with respect to all dynamic frequencies. Robustness issues are addresses in the paper by lumping all the nonlinear dynamic terms such as the centrifugal and Coriolis effects as well as the mechanical and electrical friction forces of the robot arm, into a general unstructured uncertainty term.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007971904754
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