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  • Digitale Medien  (2)
  • 61.41.+e  (1)
  • Colon malformation  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Pediatric surgery international 5 (1990), S. 124-126 
    ISSN: 1437-9813
    Schlagwort(e): Short colon ; Congenital short colon ; Pouch colon syndrome ; Colon malformation ; Anorectal agenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract There have not been many case reports of imperforate anus with congenital short colon (pouch colon syndrome). On the Indian subcontinent it is a commonly encountered entity in high ano rectal anomalies. Eighteen cases of pouch colon syndrome were treated in a period of 2 1/2 years, which constituted 26.08% of all high anorectal anomalies. All patients were male and the invertogram was diagnostic in all cases. Associated congenital malformations were common. Most of the patients were in poor general condition at the time of admission. Post-operative pulmonary complications and septicaemia were common. Pouch colostomy was performed in all cases. In the immediate post-operative period 44.44% of all patients died. A pull-through colonorraphy was done as a definitive procedure in 1 case.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-0630
    Schlagwort(e): 78.70.Bj ; 71.60.+z ; 61.41.+e
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Positron Annihilation Lifetime Spectroscopy (PALS) is used to probe the micro-structural changes in the polymer polycarbonate in terms of the changes in free volume hole size and their content as a function of temperature. The measured spectra are best fitted to three lifetime component analysis. The average hole size in the amorphous regions is determined from the measured Ortho Positronium (O-Ps) lifetime τ3 by following the treatment of Nakanishi et al. On the other hand, information about defects in the crystalline regions is revealed by trapped positrons lifetime τ2. In this polymer the average hole radius varies from 2.71 Å to 2.77 Å. The present study indicates that this polymer has a glass transition temperature of 152°C. Further, we have calculated the trapping rates in the ordered and disordered regions of the polymer based on Goldanskii's kinetic equations and an attempt is made for the first time to estimate the activation energy in the amorphous and crystalline regions separately.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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