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  • PACS: 73.50.Jt; 73.50.Gr; 81.15.Fg  (1)
  • Porcine  (1)
  • fertilization  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Elastic pressure-volume curves of the respiratory system reveal a high tendency to lung collapse in young pigs (1999)
    Springer
    Intensive care medicine 25 (1999), S. 1140-1146 
    Details
    ISSN: 1432-1238
    Keywords: Key words Animal ; Porcine ; Mechanics ; Compliance ; Elastic recoil ; Recruitment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To study pressure-volume (P/V) curves over a wide pressure and volume range in pigs.¶Design: Dynamic and static P/V curves (Pdyn/V and Pst/V) and compliance of the respiratory system were studied. The effects of recruitment, positive end-expiratory pressure (PEEP) and body position were analysed.¶Setting: Research animal laboratory.¶Materials: Seven anaesthetised, paralysed and ventilated healthy pigs of 21 kg.¶Measurements: P/V curves up to a pressure of about 40 cmH2O were recorded with a computer-controlled ventilator. Pst/V curves were obtained with the static occlusion method and Pdyn/V curves during an insufflation at a low, constant flow rate.¶Results: Pdyn/V recording showed a complex pattern. During the insufflation compliance increased, fell, increased and fell again. A 2nd ¶Pdyn/V recording immediately following the 1st one was displaced towards higher volumes and showed only one maximum of compliance. The difference between the two curves reflected: (1) lung collapse during a period of 5 min of ventilation at zero end-expiratory pressure (ZEEP) following a recruitment manoeuvre, (2) recruitment during the measurement of the 1st Pdyn/V curve. These observations were similar in the supine and in the left lateral position. After ventilation at PEEP, 4 cmH2O, the signs of collapse and recruitment were reduced. It was confirmed that PEEP offers a partial protection against collapse. Pst/V curves showed higher volumes and higher compliance values compared to Pdyn/V curves. This reflects the influence of viscoelastance on Pdyn/V curves.¶Conclusion: The study demonstrates a particularly strong tendency to lung collapse in pigs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340051026
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oxygen deficiency dependence of magnetic and magnetoresistive properties for La0.5Sr0.5CoO3-x thin films prepared by pulsed laser deposition (1999)
    Springer
    Applied physics 68 (1999), S. 533-538 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 73.50.Jt; 73.50.Gr; 81.15.Fg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The complete (001)-oriented thin films of La0.5Sr0.5CoO3-x (LSCO) are deposited on (001) SrTiO3 substrates by pulsed laser deposition under reduced oxygen pressure. It is revealed that the c axis of the film stretches with depleting oxygen. The magnetic, electrical, and magnetoresistive properties of the films are characterized by means of various techniques. Significant dependence of these properties on oxygen deficiency in the films is demonstrated, with enhanced magnetoresistance recorded for the samples deposited over a wide range of reduced oxygen pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050936
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The development of bovine follicular oocytes matured in different culture media (1991)
    Springer
    Veterinary research communications 15 (1991), S. 257-260 
    Details
    ISSN: 1573-7446
    Keywords: cattle ; culture media ; fertilization ; follicular oocyte ; in vitro maturation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430029
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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