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  • 1
    ISSN: 1434-601X
    Keywords: 41.50.th ; 41.60.−m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The interference of transition radiation coherently produced from a periodic stack of four polyimide foils of 7.2 μm thickness and a separation of 162 μm was investigated. This stack has been brought into the low emittance (3 π nm rad) electron beam of the 855 MeV Mainz Microtron MAMI. Transition radiation was observed in the energy range from 2 to 15 keV with a LN2-cooled pin photodiode. A good energy resolution of 0.8 keV and angular resolution of 0.15 mrad was achieved simultaneously allowing for the first time to quantitatively study the interference pattern. Good agreement with theoretical calculations is found. Prospects to exploit transition radiation in the x-ray region from a low emittance electron beam as a high brilliant radiation source are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Transgenic research 4 (1995), S. 155-162 
    ISSN: 1573-9368
    Keywords: Drosophila ; transposon ; P element ; enhancer-trap ; FLP/FRT ; reverse genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The introduction of cloned and manipulated genetic material into the germline of an experimental organism is one of the most powerful tools of modern biology. In the case of the fruit fly,Drosophila melanogaster, there is also an unparalleled range of sophisticated genetic tools to facilitate subsequent analysis. In consequence,Drosophila remains a most favourable model organism for the dissection of gene structure and functionin vivo. In this review we look at some of the achievements to date inDrosophila genome manipulation, and at what may be possible in the near future.
    Type of Medium: Electronic Resource
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