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  • 1
    Electronic Resource
    Electronic Resource
    Experimental study of the bifurcation nature of the electrostatic potential of a toroidal helical plasma (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 4152-4183 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The bifurcation nature of the electrostatic structure is studied in the toroidal helical plasma of the Compact Helical System (CHS) [K. Matsuoka et al., Proceedings of the 12th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Nice, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411]. Observation of bifurcation-related phenomena is introduced, such as characteristic patterns of discrete potential profiles, and various patterns of self-sustained oscillations termed electric pulsation. Some patterns of the electrostatic structure are found to be quite important for fusion application owing to their association with transport barrier formation. It is confirmed, as is shown in several tokamak experiments, that the thermal transport barrier is linked with electrostatic structure through the radial electric field shear that can reduce the fluctuation resulting in anomalous transport. This article describes in detail spatio-temporal evolution during self-sustained oscillation, together with correlation between the radial electric field and other plasma parameters. An experimental survey to find dependence of the temporal and spatial patterns on plasma parameters is performed in order to understand systematically the bifurcation property of the toroidal helical plasma. The experimental results are compared with the neoclassical bifurcation property that is believed to explain the observed bifurcation property of the CHS plasmas. The present results show that the electrostatic property plays an essential role in the structural formation of toroidal helical plasmas, and demonstrate that toroidal plasma is an open system with a strong nonlinearity to provide a new attractive problem to be studied. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1290483
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  • 2
    Electronic Resource
    Electronic Resource
    Development of far-infrared Ge:Ga photoconductor having a longitudinal configuration (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 3099-3101 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In order to efficiency obtain a two-dimensional (2D) image in the 3 THz range, it is important to develop a 2D far-infrared detector array. We have developed a gallium-doped germanium (Ge:Ga) far-infrared photoconductor that has a longitudinal configuration. This structure is suitable for a large format monolithic 2D array. In this letter, we show that a transparent electrode that is responsive in the far-infrared range can be formed by ion implantation, and this layer contributed to increasing quantum efficiency. We obtained a high responsivity (16.2 A/W) and good noise equivalent power (2.6×10−17 W/Hz1/2) of Ge:Ga photoconductor in longitudinal configuration by combination of ion-implanted layers and Ge:Ga bulk material. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1323742
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  • 3
    Electronic Resource
    Electronic Resource
    Reduction method for low-frequency noise of GaAs junction field-effect transistor at a cryogenic temperature (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 1844-1846 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A GaAs junction field-effect transistor (JFET) is a promising candidate for low-frequency, low-noise, and low-power cryogenic electronics to read out high-impedance photodetectors. We report on the spectral noise characteristics of a SONY n-type GaAs JFET, operating at the depression mode, at a cryogenic temperature of 4.2 K. If the GaAs JFET is turned on at 4.2 K, a random telegraph signal (RTS) is found to be the dominant noise source at low frequencies. However, the switching rate of RTS can be drastically reduced if the GaAs JFET is heated up to 55 K and cooled down again to 4.2 K while keeping the same drain current flow. We refer to this phenomenon as the thermal cure (TC). With TC, low-frequency noise can be reduced to below 1 μV/Hz1/2 at 1 Hz. The critical temperature for TC is found to be ∼35 K for our GaAs JFET. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1461421
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  • 4
    Electronic Resource
    Electronic Resource
    MBP deposition in eosinophilic gastroenteritis [A young bo] (2000)
    Copenhagen : Munksgaard International Publishers
    Allergy 55 (2000), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1398-9995.2000.00786.x
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  • 5
    Electronic Resource
    Electronic Resource
    Multilocular giant epidermal cyst (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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.06227.x
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  • 6
    Electronic Resource
    Electronic Resource
    Production and detection of cold antihydrogen atoms (2002)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 419 (2002), S. 456-459 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A theoretical underpinning of the standard model of fundamental particles and interactions is CPT invariance, which requires that the laws of physics be invariant under the combined discrete operations of charge conjugation, parity and time reversal. Antimatter, the existence of which was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01096
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  • 7
    Electronic Resource
    Electronic Resource
    Flocculation of dispersed systems stabilized by nonionic surfactant (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 1122-1124 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Wässerige Suspensionen und Emulsionen, die durch nichtionogene Tenside vorn Polyoxyäthylentyp allein stabilisiert sind, werden durch Zusatz polymerer Säuren (z. B. Polyakrylsäure) und Elektrolyten (Säure und neutrale Salze polyvalenter Kationen) geflockt. Die destabilisierende Wirkung der polymeren Säuren wird der Wechselwirkung zwischen der Polymersäure und dem nichtionogenen Tensid zugeschrieben. Einige Beispiele für die Flockungsreaktion werden mitgeteilt.
    Notes: Summary Aqueous suspensions and emulsions stabilized solely by nonionic surfactant of the polyoxyethylene type are flocculated by adding polymeric acid (for example, poly-acrylic acid) and electrolyte (acid and neutral salts of polyvalent cations). This destabilization effect of polymeric acids is ascribed to the interaction between the polyacid and nonionic surfactant on the colloid particles. Some examples of the flocculation reaction are shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01549900
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  • 8
    Electronic Resource
    Electronic Resource
    Alterations in neutral amino acid transport across the blood-brain barrier in hepatic failure (1983)
    Springer
    Research in experimental medicine 183 (1983), S. 11-18 
    Details
    ISSN: 1433-8580
    Keywords: Blood-brain barrier ; Neutral amino acid ; Hepatic failure ; Amino acid transport into the brain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The accelerated transport of the blood neutral amino acids into the brain in encephalopathic patients with fulminant hepatitis and advanced liver cirrhosis was demonstrated not only by determining the cerebrospinal fluid (CSF) aminogram but also by calculating the predicted velocity of the amino acid transport through the blood-brain barrier. Significant elevation in CSF aromatic amino acid (AAA) and methionine levels was observed in the encephalopathic patients. Arousal from hepatic encephalopathy by drip infusion of a branched chain amino acid (BCAA)-enriched solution was obtained coincidentally with the elevated BCAA levels and diminished concentrations of AAA and methionine in CSF. These clinical observations were confirmed experimentally in rats treated with carbon tetrachloride (CCl4) andd-galactosamine by obtaining the elevation of neutral amino acid contents in the brain and the slight increase in the brain uptake index (BUI) of a radiolabeled amino acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851759
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  • 9
    Electronic Resource
    Electronic Resource
    Stereochemical aspects of micellar properties of esterified glucoside surfactants in water: apparent molar volume, adiabatic compressibility, and aggregation number (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 576-580 
    Details
    ISSN: 1435-1536
    Keywords: Key words Sugar surfactant ; Anomerism ; Micelle ; Compressibility ; Static light scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The apparent molar volume and the apparent molar adiabatic compressibility of the sugar-based surfactants methyl 6-O-octanoyl-α-d-glucopyranoside (α-MOnG), methyl 6-O-octanoyl-β-d-glucopyranoside (β-MOnG), and octyl β-d-glucoside were measured over a wide concentration range. Also, the aggregation number of their micelles was determined from the Debye plot using static light scattering data. It was found that the micellar aggregation number for α-MOnG is 179 at 35 °C, which is 1.5 times larger than that for β-MOnG, suggesting that the anomerism of the head group influences the packing of the monomers during micelle formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050558
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  • 10
    Electronic Resource
    Electronic Resource
    Reaction mechanism of 6Li scattering at 600 MeV (2000)
    Springer
    The European physical journal 7 (2000), S. 367-375 
    Details
    ISSN: 1434-601X
    Keywords: PACS: 24.50.+g Direct reactions – 25.60.Gc Breakup and momentum distributions – 27.20.+n 6 ≤ A ≤ 19
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Elastic scattering and inclusive breakup of 6Li particles on 12C, 58Ni, 90Zr, and 208Pb targets are measured at 100A MeV. The elastic scattering data are compared with single channel and Coupled Discretized Continuum Channels calculations. The coupling-effect between the elastic and the breakup channels is important even at an incident energy of 100A MeV and cannot be neglected. The inclusive breakup data are investigated for orbital dispersion effects which are found to be less significant at 100A MeV. The longitudinal momentum distributions are broader than predicted by theoretical expectations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00013619
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