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  • 1
    Electronic Resource
    Electronic Resource
    Biochemical Characterization of the T-Cell Mitogen Derived from Mycoplasma arthritides. (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 24 (1986), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A biochemical procedure is described to purify the T-cell mitogen in the supernatant of cultured Mycoplasma arthritidis organisms. The mitogenic material was bound on an affigel blue column. The eluate of this column was then acylated at 0°C for 1.5 h and subsequently chromatography on a Sepharose C1 6B and a Superose 12HR column were performed. SDS-PAGE showed a major band at MW 26,000 and some minor bands at 50,000. With this material biological tests were performed, including induction of lymphoproliferation and interferon induction in murine spleen cell cultures. Purified Mycoplasma arthritidis supernatant (MAS) vigorously stimulated spleen cell cultures of A/J, CBA, C3H/He, and DBA/2 mice, whereas a low-grade hut definitive response was observed in C57BL/6 spleen cells. Cultures of Balb/c nu/nu mice, in contrast to those of their euthymic littermates, were non-reactive. When induction of interferon was tested, a marked response to purified MAS was observed in CBA and C3H/HeJ spleen cell cultures, whereas C57BL/6 spleen cells were non-reactive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1986.tb02091.x
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  • 2
    Electronic Resource
    Electronic Resource
    Phase behaviour and physical properties of the cationic quaternary system tetradecyldimethylamine oxide hydrochloric acid 1-hexanol water (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 137-142 
    Details
    ISSN: 1435-1536
    Keywords: Key words Small vesicles ; Phase behaviour ; Small-angle neutron scattering ; Charged surfactants
    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 phase behaviour and properties of the tetradecyldimethylamine oxide/HCl/hexanol/water quaternary surfactant system have been studied by means of electric conductivity, rheology, freeze-fracture transmission electron microscopy (FF-TEM) and small-angle neutron scattering (SANS). In this system the originally zwitterionic surfactant can become increasingly charged by protonation through the addition of HCl, i.e. the degree of charging can be changed continuously. An interesting, isotropic phase (L1 * phase) of low viscosity was observed for intermediate degrees of charging. From viscosity and conductivity measurements this phase can clearly be distinguished from the conventional L1 phase that is composed of micelles. Investigation of the structures present by means of FF-TEM and SANS showed that the L1 * phase is made up of unilamellar vesicles of extremely small diameter of 8–10 nm. Evidently such highly curved structures are stabilized by the electrostatic conditions in this system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050023
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  • 3
    Electronic Resource
    Electronic Resource
    Large-scale configuration of the magnetic field in spiral galaxies (1986)
    Springer
    Astrophysics and space science 119 (1986), S. 191-194 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Global configuration of magnetic field in several spiral galaxies were determined by analysing characteristic variation of Faraday rotation within the galaxy disks. The majority has an open spiral, bisymmetric field configuration, while some (10–20%) have a ring field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648844
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  • 4
    Electronic Resource
    Electronic Resource
    Search for narrow dibaryon resonances in neutral pion photoproduction from the deuteron (2000)
    Springer
    The European physical journal 9 (2000), S. 309-311 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 13.60.Le Meson production – 14.20.Pt Dibaryons – 25.20.Lj Photoproduction reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The reaction γd↦π0 X has been measured with TAPS at MAMI in the energy range E γ = 140-300 MeV. Using the Glasgow tagging spectrometer a photon energy resolution of 0.8 MeV was achieved. The energy excitation functions of integral and differential total cross-sections show no structures of statistical significance 〉 2σ. Upper limits for the production of narrow isoscalar or isovector dibaryons with masses m? 2100 MeV/c2 were deduced. They are in the range 2-5 μb averaged over the 0.8 MeV energy resolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070015
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  • 5
    Electronic Resource
    Electronic Resource
    Reliability of cranial CT versus intracerebral pressure measurement for the evaluation of generalised cerebral oedema in children (2000)
    Springer
    Pediatric radiology 30 (2000), S. 439-443 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective. To examine the extent to which intracranial pressure (ICP) in children after severe brain trauma can be determined by cranial CT.¶Materials and methods. Two experienced paediatric radiologists, without any knowledge of the clinical symptoms, evaluated 124 CT scans from 65 children (average age 5.4 years) who underwent intracranial measurement of their cerebral pressure.¶Results. CT had high sensitivity (99.1 %) for ’high cerebral pressure' but a much lower specificity (78.1 %). The examiners tended to estimate ICP as ’high' even when actual ICP was low. Since therapy for lowering cerebral pressure involves potential risks, actual cerebral pressure measurement, particularly in children, should be considered before intervention (e. g. hyperventilation or trepanation). We report the change in different intracerebral fluid compartments with varying cerebral pressure and modifications of the density of the brain tissue in an inter- and intraobserver comparison.¶Conclusion. The radiologist cannot differentiate, for methodological reasons, between a change in the intracranial fluid compartments not associated with a change in ICP and one in which it is critically elevated. Before any interventional treatments such as decompression-trepanation or hyperventilation are instituted, measurement of ICP should be considered, especially in children.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002470000255
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  • 6
    Electronic Resource
    Electronic Resource
    Ein 3-D-Kapselsackmodell zur Beschreibung der biomechanischen Eigenschaften neuer Kunstlinsentypen (2000)
    Springer
    Der Ophthalmologe 97 (2000), S. 546-551 
    Details
    ISSN: 1433-0423
    Keywords: Schlüsselwörter 3-D-Kapselsackmodell ; Intraokularlinsen ; Kapselsackverformung ; Keywords Three-dimensional capsular bag model ; Intraocular lenses ; Capsular bag distortion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background. This study quantified the geometric deformation of the capsular bag following implantation of various intraocular lenses (IOL) using a three-dimensional capsular bag model made of silicone caoutchouc. Methods. After implantation of 13 different IOLs (polymethylmethacrylate, silicone acrygel) into the artificial bag, the induced capsular bag deformation was measured and analyzed. The posterior space between IOL and capsule was examined by ultrasonographic biomicroscopy. Results. Polymethylmethacrylate IOLs with C-haptic design induced a greater deformation of the capsular bag than silicone lenses; however, both types showed a larger gap posterior to the IOL than acrygel lenses. Acrygel IOLs with different haptic design revealed only minimal deformation with close contact posteriorly. Conclusions. The presented three-dimensional model simulates the biomechanical and geometrical parameters of the vital capsular bag. Further investigations may determine a correlation of close posterior IOL contact and lens epithelial cell progression.
    Notes: Zusammenfassung Hintergrund. Zur Bestimmung einer eventuellen Verformung des Kapselsackes nach Implantation von. Intraokularlinsen (IOL) aus unterschiedlichem Material und Design wurde mit Hilfe einer geeigneten Preßvorrichtung aus Silikonkautschuck ein 3-dimensionales Modell des Kapselsackes hergestellt. Material und Methode. Nach Einsetzen von 13 verschiedenen Intraokularlinsen aus PMMA, Silikon und Acrygel in den künstlichen Kapselsack wurden die Verformungsgrade mit Hilfe von Deformierungsquotienten und -faktoren bestimmt. Mit Hilfe des Ultraschallbiomikroskopes (UBM) wurde die Größe des Spaltes zur Kapselsackrückwand ermittelt. Ergebnisse. Intraokularlinsen aus PMMA mit C-Haptik-Design bewirkten eine relativ stärkere Verformung des Kapselsackes als Linsen aus Silikon. Beide Linsentypen zeigten einen relativ breiten Spalt zwischen Optik und Kapselsackrückwand. Intraokularlinsen aus Acrygel mit atypischen Haptikkonfigurationen oder C-Haptik erzielten bessere Ergebnisse hinsichtlich der Verformung und spaltfreier Lage der Optik zur Kapselsackrückwand. Schlussfolgerungen. Ein 3-D-Silikonkautschuckmodell ist geeignet, eine mögliche Verformung des Kapselsackes nach der Implantation einer IOL und die Lage der Optik zur Kapselsackrückwand außerhalb des Auges zu simulieren. Aus den gewonnenen Ergebnissen hinsichtlich der spaltfreien Lage der Optik zur Kapselsackrückwand könnte man Rückschlüsse auf die zu erwartende Nachstarentwicklung ziehen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003470070063
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  • 7
    Electronic Resource
    Electronic Resource
    Fast-axial-flow CO2-laser with integrated turbo-blower (1987)
    Springer
    Applied physics 42 (1987), S. 233-236 
    Details
    ISSN: 1432-0649
    Keywords: 42.5E
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new type of CO2-laser with high-power capability is described. It employs fast axial flow driven by a high-frequency radial impeller. Due to the coaxial design which integrates discharge tube, blower, and gas cooler into a single cylindrical housing, a very compact laser unit is realized. The discharge is rf excited (13.56 MHz). With a specific input power of 21 W/cm3 an output of 800 W is generated at an efficiency of 16%. The discharge can easily be operated in a pulsed mode with frequencies up to 10 kHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693941
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  • 8
    Electronic Resource
    Electronic Resource
    Acceleration of cosmic-ray electrons by large-scale galactic spiral shocks — An observational report (1989)
    Springer
    Astrophysics and space science 156 (1989), S. 195-198 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hypothesis that large-scale shocks accompanying spiral density waves are the main sources of cosmic-ray electrons for whole galactic disks has been tested utilizing results of 10.7 GHz observations of spiral galaxies. It is suggested that the 10.7 GHz emission of galactic disks is largely controlled by star-forming processes, and that large-scale shocks apparently play a minor role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646365
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  • 9
    Electronic Resource
    Electronic Resource
    Double- π0 photoproduction from the deuteron (2000)
    Springer
    The European physical journal 9 (2000), S. 1-4 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 13.60.Le Meson production – 25.20.Lj Photoproduction reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The photoproduction of two neutral pions from the deuteron has been studied for incident photon energies from 200 MeV to 820 MeV with the TAPS spectrometer at MAMI (Mainz Microtron). The total cross-section was determined and used to deduce the cross-section from the neutron. Due to the good statistical quality of the data Dalitz plots for the three particles in the exit channel (π0π0 N) could be constructed. The invariant mass distributions derived from them are presented in this paper. They indicate that the important reaction mechanism in the second resonance region is a sequential decay pattern involving the population of the Δ(1232)-resonance as an intermediate state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070047
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  • 10
    Electronic Resource
    Electronic Resource
    Photoproduction of neutral pion pairs from the proton (2000)
    Springer
    The European physical journal 9 (2000), S. 5-8 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 13.60.Le Meson production – 25.20.Lj Photoproduction reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Double neutral pion photoproduction from the proton has been measured at MAMI for photon energies between threshold and 820 MeV. The reaction was identified by an invariant mass and missing mass analysis. From threshold up to 370 MeV the total cross-section does not exceed 30 nb. For higher energies it shows a smooth rise until it reaches a maximum of about 10 μb at E γ = 740 MeV. Dalitz plots of m 2(π0π0) versus m 2(p,π0) for seven bins of incident photon energy have been analysed. For E γ 〉 610 MeV, a strong contribution of a sequential decay is observed with the Δ(1232)-resonance as intermediate state. A comparison to model calculations shows that these sequential decays presumably originate from the D 13(1520) and also the P 11(1440)-resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070048
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