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  • 1
    Electronic Resource
    Electronic Resource
    Global energy confinement under coupling of the transport process with magnetohydrodynamic modes (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 2753-2759 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Macroscopic instabilities are governed by transport-determined plasma profiles and transport, in turn, is affected by instabilities. It is clear that neither transport process nor the behavior of instabilities can be treated in isolation. A model is developed for investigating the effects of the instabilities on global energy confinement in tokamaks. The results clearly demonstrate that magnetohydrodynamic (MHD) instabilities coupled with the transport process change not only the value of global energy confinement time, but also, perhaps more importantly, the energy confinement scaling law. While considering MHD effects, global energy confinement becomes sensitively dependent on the boundary transport conditions, and the cases with and without MHD stability can result in quite different parameter behavior of the global energy confinement. Such coupling should be considered when attempts are made to analyze the global energy confinement in tokamaks. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871240
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  • 2
    Electronic Resource
    Electronic Resource
    Studies of Pd-Fe fine particles (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5907-5907 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A vapor-deposition technique was used to prepare Pd-Fe fine particles. Since palladium is fairly inert, it is our hope to develop magnetic particles which are stable in air. An as-cast alloy of bulk Pd-Fe was made by an arc-melting method. This as-cast ingot was evaporated from an alumina crucible in argon gas at a pressure of 2.0 Torr. Particles formed in the gas and were then deposited on a water-cooled copper plate by thermophoresis. Chemical analysis, x-ray diffraction and transmission electron microscopy were used to investigate the composition, structure, and morphology of the particles. The as-received fine particles were amorphous. They showed a Curie temperature of 420 °C, which was lower than that of the as-cast ingot (600 °C). Saturation magnetization and coercivity were 53.5 emu/g and 2000 Oe at 10 K as measured by a SQUID magnetometer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346012
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rapid magnetic reconnection in the Earth’s magnetosphere mediated by whistler waves (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 410 (2001), S. 557-560 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Magnetic reconnection has a crucial role in a variety of plasma environments in providing a mechanism for the fast release of stored magnetic energy. During reconnection the plasma forms a ‘magnetic nozzle’, like the nozzle of a hose, and the rate is controlled by how fast plasma ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35069018
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  • 4
    Electronic Resource
    Electronic Resource
    Modulation of tendon healing by nitric oxide (1997)
    Springer
    Inflammation research 46 (1997), S. 19-27 
    Details
    ISSN: 1420-908X
    Keywords: Key words: Nitric oxide — Tendon healing — Free radical — Wound healing — Nitric oxide synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Nitric oxide (NO.) is a small, diffusible free radical that is generated from L-arginine by a family of enzymes, collectively termed the nitric oxide synthases. We investigated the role of NO. in tendon healing. NO. synthase activity and immunoreactivity was absent in un-injured rat Achilles tendon. After surgical division there was a five-fold increase in NO. synthase activity and immunoreactivity within the healing tendon at day 7, with a return to near baseline levels at day 14. Inhibition of NO. synthase activity with oral administration of N〈omega〉-nitro-L-arginine methyl ester (L-NAME) resulted in a significant reduction in cross-sectional area (30% at day 7, p 〈 0.01, 50% at day 15, p 〈 0.001) and failure load (24% at day 7, p 〈0.01) of the healing Achilles tendon constructs. Rats fed the same regimen of the enantiomer of L-NAME, (D-NAME) had normal tendon healing. These results indicate that nitric oxide synthase is induced during tendon healing and inhibition of nitric oxide synthase inhibits this tendon healing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000110050027
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    Paper (German National Licenses)
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