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  • 1
    Electronic Resource
    Electronic Resource
    AN IMMUNOFLUORESCENT STUDY OF SPERM ISOIMMUNIZATION IN INFERTILE WOMEN (1974)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 81 (1974), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Serum from 32 infertile women and from eight control patients was investigated for antisperm activity using an indirect immunofluorescent antibody technique. The results confirmed previous reports of the surface localization of antigens on human spermatozoa. Specific antibody staining was observed on the sperm acrosome and tail; neck and equatorial segment staining was common and non-specific. Antibodies in the IgM and IgG classes localized on the acrosome, whereas tail staining was exclusively due to IgG antibodies. In seven out of eight sera in which a complement-dependent sperm immobilization test was positive, an IgG antibody was demonstrated which localized on the sperm tail. There was a poor correlation between positive sperm micro-agglutination and specific immuno-fluorescent reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1974.tb00484.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heterodyne interferometer with two-wave mixing in photorefractive crystals for ultrasound detection on rough surfaces (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 3782-3784 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Heterodyne interferometers using two-wave mixing in photorefractive cubic crystals for ultrasound detection on rough surfaces are demonstrated. The speckled scattered beam from a rough surface sample interferes with a planar coherent pump beam inside a photorefractive crystal. A third frequency-shifted beam is used to read the grating. The diffracted readout beam and the transmitted signal beam are wavefront matched, resulting in an optimal heterodyne interference signal. The signal to noise ratio for the two commonly used crystallographic configurations with cubic crystals, G(parallel)〈110〉(parallel) and G(parallel)〈001〉, where G is the grating wave vector, are investigated. Very good sensitivity is demonstrated for the detection of small amplitude ultrasonic surface displacements. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116997
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  • 3
    Electronic Resource
    Electronic Resource
    Self-focusing Rayleigh wave using a time reversal mirror (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 161-163 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Detection of surface and subsurface flaws is achieved using the time reversal process leading to self-focusing Rayleigh waves. The generation of surface waves is accomplished with an array of transducers coupled to the specimen with a Plexiglas wedge. The advantages of this technique are demonstrated with the detection of surface and subsurface holes of subwavelength dimensions. An optical interferometer is used to control the surface acoustic field obtained with such a time reversal process. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116134
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  • 4
    Electronic Resource
    Electronic Resource
    Broadband optical detection of ultrasound by two-wave mixing in a photorefractive crystal (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 3233-3235 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method which allows broadband (from typically 1 KHz) optical detection of ultrasound with large light gathering from a scattering surface is presented. The wave scattered by the surface is mixed inside a BaTiO3 photorefractive crystal with a pump wave directly derived from the laser to provide a sideband-free reference wave. A polarization configuration which provides sensitive and linear ultrasonic displacement detection is described. This method is demonstrated by detecting laser generated ultrasound.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105742
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  • 5
    Electronic Resource
    Electronic Resource
    Awake intubation of the difficult airway with the intubating laryngeal mask airway (1998)
    Oxford : Blackwell Science Ltd
    Anaesthesia 53 (1998), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The intubating laryngeal mask airway is a new device that facilitates intubation of the trachea. We assessed its use in 15 awake patients in whom we anticipated difficulty with tracheal intubation; we would otherwise have secured the patients' airways using a fibreoptic bronchoscope. All patients were sedated and had their airways anaesthetised with local anaesthetic. The tracheas of all 15 patients were successfully intubated. The mean time from start of sedation to successful intubation was 10.8 min. The mean time from completion of sedation and airway local anaesthesia to tracheal intubation was 2.8 min. Patients remained haemodynamically stable throughout, peripheral oxygen saturation was maintained and there were no obvious cases of pulmonary aspiration. Most patients complained of sore throat and hoarseness. We have demonstrated through this descriptive study that the intubating laryngeal mask airway may, in certain circumstances, be used as an alternative to the fibreoptic bronchoscope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2044.1998.429-az0533.x
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  • 6
    Electronic Resource
    Electronic Resource
    Convection warmers — not just hot air (1997)
    Oxford, UK : Blackwell Science Ltd
    Anaesthesia 52 (1997), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We sought to determine whether the forced air convection warmers (nine Bair Huggers, Augustine Medical, and one Warm Touch, Mallinkrodt Medical) used in our operating theatres could be a source of microbial pathogens. Agar plates were placed directly in the air stream of the warmers. Four of these grew potentially pathogenic organisms. When the warmers were set to blow through perforated blankets, no growth occurred. Three of the warmers were swabbed and sites of colonisation were found in their hoses. After fixing a microbial filter to the end of the hose, organisms were no longer detectable. We conclude that these warming devices are a potential source of nosocomial infection. They should only be used in conjunction with perforated blankets, should have their microbial filters changed regularly and their hoses sterilised. The inclusion of a microbial filter into the nozzle of the hose could be incorporated into the design of the warmer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1997.250-az0384.x
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  • 7
    Electronic Resource
    Electronic Resource
    Modale Behandlung linearer periodisch zeitvarianter Bewegungsgleichungen (1995)
    Springer
    Archive of applied mechanics 65 (1995), S. 178-193 
    Details
    ISSN: 1432-0681
    Keywords: Key words Periodic motion ; modal treatment ; itrations ; time variance ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Übersicht  Lineare, periodisch zeitvariante Bewegungsgleichungen treten im Hubschrauber- und Windturbinenbau auf. Der Getriebebau und die Rotordynamik liefern weitere Beispiele. In diesem Bericht wird ein systematischer Weg zu ihrer Lösung dargestellt. Mit dem Ansatz von Hill wird die homogene Lösung über die Lösung eines Eigenwertproblems gewonnen. Nach Anpassung an die Anfangsbedingungen liefert sie die Fundamentalmatrix des Systems. Ähnlich wie bei zeitinvarianten Systemen, existieren auch bei zeitvarianten Systemen Orthogonalitätsbedingungen, die die Eigenvektoren erfüllen. Die Eigenvektoren selbst sind allerdings zeitabhängig. Benutzt man die Eigenvektoren als Ansatzvektor zur Berechnung der erzwungenen Schwingungen (Transformation mit der zeitvarianten Modalmatrix des Systems), so gelingt es, die Bewegungsgleichungen des Systems in entkoppelte, zeitinvariante zu überführen. Sie lassen sich in bekannter Weise lösen. Dieses Vorgehen wird auf eine moderne Windkraftanlage angewandt. Sie wurde zunächst mit 372 Freiheitsgraden modelliert, die aber auf 18 vor der numerischen Weiterbehandlung kondensiert wurden. Das Stabilitätsverhalten und die Antwortspektren auf stochastische Anregung durch den Wind wurden auf dem oben beschriebenen Weg ermittelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799297
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