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  • 1
    Electronic Resource
    Electronic Resource
    Interactions of magnetic resonance imaging radio frequency magnetic fields with elongated medical implants (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 6188-6190 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic resonance imaging (MRI) is a well established diagnostic technique, one from which all patients should be able to benefit, including those with implanted medical devices. This paper describes an experimental and numerical study of the temperature rise near the ends of wires by the radio frequency (rf) field in MRI. These wires simulate long wires which may be part of a medical implant. Temperature rise as a function of time was measured for wires of different lengths and diameters in a phantom exposed to the 64 MHz rf field inside a MRI body coil. For wires with no or thin insulation, the maximal rise was about seven times background for a wire length of 20 cm; wires with longer and shorter lengths exhibited less temperature rise. The temperature rise was greater for wires with thicker insulation. Computer simulations using a quasistatic model are in reasonable agreement with the measurements on shorter wires. It is concluded that medical implants with long conducting lead wires may result in potentially unsafe temperature rise during MRI imaging. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372651
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  • 2
    Electronic Resource
    Electronic Resource
    Editorial (2004)
    Oxford, UK : Blackwell Science Ltd
    International journal of food science & technology 39 (2004), S. 0 
    Details
    ISSN: 1365-2621
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2004.00848.x
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  • 3
    Electronic Resource
    Electronic Resource
    The comings and goings of a Y polymorphism (2003)
    [s.l.] : Nature Publishing Group
    Nature genetics 35 (2003), S. 201-202 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] For a chromosome whose evolutionary future has been doubted, the human Y is not doing much to help itself. Roughly 5–10% of men suffer from infertility, which can be attributed to deletions of the AZF (azoospermia factor) regions in 1% of cases. AZFc deletions alone occur in 1 of 4,000 men. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng1103-201
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  • 4
    Electronic Resource
    Electronic Resource
    Photonics On the threshold of success (2000)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 408 (2000), S. 653-655 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Photonic crystals occur naturally as semiprecious opal and the microscopic structures on the wings of some tropical butterflies. They are repeating structures that inhibit the propagation of some frequencies of light. They often produce brilliant colour effects by selecting narrow parts of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35047196
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  • 5
    Electronic Resource
    Electronic Resource
    A neocentromere in the DAZ region of the human Y chromosome (2000)
    Springer
    Chromosoma 109 (2000), S. 318-327 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. We describe a novel rearranged human Y chromosome consisting of an inverted duplication of the long arm heterochromatin and a small amount of euchromatin: rea(Y)(qter–q11.2::q11.2–qter). The normal centromere has been deleted and a neocentromere containing CENP-A, -C, -E and Mad2 but not CENP-B has formed close to the breakpoint. A 2.7 Mb yeast artificial chromosome contig spanning the breakpoint was constructed and the breakpoint was localised to a region of 〈120 kb close to the DAZ gene cluster. Combined immunofluorescence and fluorescence in situ hybridisation showed that the centromeric protein-binding domain of the neocentromere was located near the breakpoint and within the DAZ cluster.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004120000081
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