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  • 1
    Electronic Resource
    Electronic Resource
    Phosphor plate mammography: contrast studies and clinical experience (1992)
    Springer
    European radiology 2 (1992), S. 483-487 
    Details
    ISSN: 1432-1084
    Keywords: Mammography ; Phosphor plates ; Modulation transfer function ; Image contrast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Mammography and accurate microcalcification detection require very good spatial resolution. We have compared the diagnostic capabilities of reduced-exposure, third-generation, 5 cycles/mm computed radiography (CR) phosphor plates with conventional screen-film in 67 patients. No difference in diagnostic accuracy was detected. The digital characteristics of storage phosphor plates erabled us to study the relationship between contrast and spatial resolution. We developed a computer program to identify a single 100 μm pixel in a digital image and assign various gray levels to that pixel. Using this model, we determined that, for our 5 cycles/mm CR system, the imaged contrast of a 100 μm object was 62% of the original contrast. Current 5 cycles/mm phosphor plate systems cannot adequately detect microcalcifications that approximate 100 μm or smaller unless a magnification technique is used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00176358
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  • 2
    Electronic Resource
    Electronic Resource
    An efficient trap for the collection of a cadmium atomic beam (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 4900-4901 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Precautions are described for the successful operation of a crossed-beam apparatus which uses an atomic cadmium target. These include a novel type of high-voltage trap for the collection of cadmium vapor. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146171
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Sequence and relatedness in other bacteria of the Pseudomonas aeruginosa oprP gene coding for the phosphate-specific porin P (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 4 (1990), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The oprP gene encoding the Pseudomonas aeruginosa phosphate-specific outer membrane porin protein OprP was sequenced. Comparison of the derived amino acid sequence with the known sequences of other bacterial porins demonstrated that OprP could be no better aligned to these porin sequences than it could to the periplasmic phosphate-binding protein PhoS of Escherichia coli. Southern hybridization and restriction mapping of the oprP gene in 37 clinical isolates and the 17 serotype strains of P. aeruginosa revealed that restriction sites in the vicinity of the oprP gene were highly conserved. Several species from the Pseudomonas fluorescens rRNA homology group contained DNA that hybridized to an oprP gene probe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1990.tb00653.x
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    Paper (German National Licenses)
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