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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Rheumatologie 56 (1997), S. 342-350 
    ISSN: 0340-1855
    Keywords: Schlüsselwörter Arthrose ; Finger ; Judo ; Trauma ; Sport ; Key words Osteoarthritis ; Fingers ; Judo ; Trauma ; Sport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Arthrose ist die häufigste Form der Gelenkerkrankungen. Neben verschiedenen bekannten Faktoren wie z.B. Genetik, Alter und Hormonstatus werden chronisch-repetitive Mikro- und Makrotraumatisierungen bei der Fingerpolyarthrose (FIPO) als Ursache diskutiert. Das Ziel dieser longitudinalen Fallstudie war es, bei Judo-Sportlern, welche in einer früheren Untersuchung klinische und radiologische Zeichen einer Fingerpolyarthrose aufwiesen, den Verlauf der Gelenksveränderungen mittels Photographien und Röntgenbildern zu beobachten. Bei den 8 untersuchten Sportlern des Schweizerischen Judo-Nationalkaders von 1979 fanden sich einerseits die für die Fingerpolyarthrose typischen Weichteilveränderungen der DIP- und PIP-Gelenke. Andererseits zeigten diese Gelenke sowie das CMC I-Gelenk radiologisch die für die Fingerpolyarthrose typischen, im Vergleich zu den Weichteilveränderungen relativ gering ausgeprägten, degenerativen Veränderungen. Dabei konnten wir das für die Fingerpolyarthrose typische Verteilungsmuster nachweisen. Sowohl die klinischen als auch die radiologischen Veränderungen waren symmetrisch und beschränkten sich nicht auf einzelne durch Bänderrisse und Frakturen schwer traumatisierte Gelenke. Radiologisch zeigte sich eine Progredienz der degenerativen Veränderungen (p〈0.05). Diese war bei noch aktiven Sportlern deutlicher ausgeprägt. Die meisten Sportler präsentierten sich mit einem oligosymptomatischen Beschwerdebild. Zusammenfassend ist der Judo-Sport, intensiv und über Jahre praktiziert, ein Risikofaktor für die Entwicklung einer Fingerpolyarthrose. Dabei scheint eine chronisch-repetitive Mikro- und Makrotraumatisierung wesentlich.
    Notes: Summary Osteoarthritis is the most common joint disease. In addition to known risk factors e.g. genetics, age and hormonal status it has been suggested that chronic-repetitive micro- and substantial (macro-) injury may play an important pathogenetic role. In a longitudinal case-study we examined Judo-players for clinical and radiological changes of the finger joints over the course of 16 years. All examined 8 players demonstrated soft tissue changes including Heberden nodes and radiological changes typical for osteoarthritis of the finger joints. Changes were symmetrical and were not restricted to joints with tendon ruptures or fractures in the anamnesis. Degenerative changes were progressive and more pronounced in active players. Subjectively, symptoms were usually mild. Extensive Judo seems to be a risk factor for the development of osteoarthritis of the finger joints due to chronic-repetitive micro- and substantial (macro-) injury.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 979-990 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The experimental characterization of the current/outer potential (I/U) behavior during the electrochemical CO oxidation on Pt(100), Pt(110) and Pt(111) is used as the first step towards a thorough investigation of the processes occurring during the electrochemical formic acid oxidation. The CO study is followed by new cyclovoltammetric results during the electrochemical formic acid oxidation on the corresponding Pt single crystals. At high concentrations of formic acid, the cyclovoltammograms revealed a splitting of the large current peak observed on the cathodic sweep into two peaks whose dependence on scan rate and reverse potential was investigated. It turned out that the presence of a sufficiently large ohmic resistance R was crucial for oscillatory instabilities. Given an appropriate resistance, all three Pt surfaces were found to exhibit current oscillations at both low and high formic acid concentrations. On Pt(100) stable mixed-mode oscillations were observed. In addition, the sensitivity of the oscillations to stirring was investigated. Whereas the period-1 oscillations were found to be independent of stirring, the mixed-mode oscillations transformed into simple oscillations with stirring. The mechanism giving rise to instability and oscillations is described. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 991-1003 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A kinetic model is developed for the electrocatalytic oxidation of formic acid on Pt under potentiostatic control. The model development proceeds stepwise via a simple model of the electrocatalytic CO oxidation. The full model consists of four coupled, nonlinear ordinary differential equations. The scanned and stationary current/outer potential (I/U) behavior, stationary current oscillations, two-parameter bifurcation diagrams and stirring effects are simulated using realistic model parameters. The numerical findings are found to be consistent with the experimental results given by Strasser et al. The model reproduces period-1 as well as mixed-mode oscillations. Furthermore, a mechanistic analysis of the model was performed: two suboscillators are identified whose characteristics allow a plausible interpretation of the observed dynamics. After a classification of the suboscillators into previously described categories, an attempt is made to identify the minimal mechanistic requirements for electrochemical current oscillations. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    FEBS Letters 330 (1993), S. 13-18 
    ISSN: 0014-5793
    Keywords: Actin-binding protein ; Bacterial expression ; Calponin ; Smooth muscle
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0014-5793
    Keywords: C-terminus ; E. coli expression ; Metavinculin ; Sequence ; Vinculin ; Xenopus
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Planta 168 (1986), S. 381-385 
    ISSN: 1432-2048
    Keywords: Aspartate/glutamate (uptake, release) ; Cyanobacterium ; Glutamate carrier ; Nostoc ; Symbiont
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The permeability properties of the cell membrane of a symbiotic Nostoc sp. for glutamate and aspartate were investigated. These compounds were translocated across the plasmalemma by a transport system which showed a very high affinity for glutamate and a lower one for aspartate. Since a concomitant release of glutamate was observed during the uptake of these two amino acids it is concluded that the transport proceeds via a counterexchange mechanism. In addition to this counterexchange a net release of glutamate occurred in the dark. Some aspects concerning the possible function of this transport system in the symbiotic association Geosiphon pyriforme are discussed.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Muon-catalyzed fusion was investigated in thin solid deuterium films to determine the experimental feasibility of slow µ− production by detection of dd fusion protons as well as slow µ− collection utilizing a large-acceptance magnetic spectrometer. The spatial distribution of the fusion reaction in the film was extracted, and an optimum thickness for slow µ− emission was deduced. Collected 10 keV µ− were also successfully detected. However, the dd fusion yield being insufficient, we were not able to distinguish slow µ− via µCF from degraded µ−.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 119 (1999), S. 317-322 
    ISSN: 1572-9540
    Keywords: muonic X-ray spectroscopy ; exotic atom ; solid hydrogen film ; ion implantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method is proposed to extend muonic atom X-ray spectroscopy to the study of nuclear beams, including radioactive beams, by stopping both muon and nuclear beams in a solid hydrogen film. The muon transfer reaction to higher Z nuclei is used then to form muonic atoms. This method would allow studies of the nuclear charge distribution of unstable atoms.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 82 (1993), S. 543-549 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Slow μ− production via dd-μCF using a two-layer arrangement is investigated. To determine its feasibility, experimental measurements are now in progress using the muonic X-ray detection method. The following experimental steps are being considered: (1) measurement of the number of μ− stopped inside a solid H2/D2 layer by detecting pμ Kα X-rays, (2) “hot” dμ emission detection by placing a secondary target at a distance of 10–30 mm from the layer and by detecting specific delayed X-rays, (3) measurement of the disappearance of dμ emission as the added D2 layer is increased, (4) dd-μCF measurement by detecting fusion protons, and (5) slow μ− emission detection. Results of the initial test experiment are presented.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A concept, a design, a construction and an account of commissioning experiments are given for the recently completed ultra-slow muon facility at the pulsed muon facility of UT-MSL/KEK. The intense (more than 103/s) slow μ+ beam with an extremely narrow phase-space volume (0.2 eV×(3 cm)2) to be produced in this facility will open a new muon science including surface physics and chemistry and fundamental atomic physics.
    Type of Medium: Electronic Resource
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