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  • 78.70  (1)
  • Abdominoperineal resection  (1)
  • Pyrano[3,2-c]quinoline-alkaloids  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 42 (1999), S. 626-630 
    ISSN: 1530-0358
    Keywords: Continent perineal colostomy ; Abdominoperineal resection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: For patients with distal rectal or anal tumors, quality of life can be compromised after abdominoperineal resection and iliac colostomy. This study examines our experience with a continent perineal colostomy constructed from a colonic smooth-muscle cuff wrap. METHODS: Between 1987 and 1996, 63 patients with distal rectal or anal tumors (0–5 cm from the anal verge) underwent abdominoperineal resection and construction of a colonic smooth-muscle cuff at the site of the perineal colostomy. Postoperatively, all patients required colonic irrigations daily or every two days. The complications, continence at 6 and 12 months, and degree of satisfaction were prospectively evaluated using a standard questionnaire. RESULTS: Early complications included partial perineal dehiscence in 14 (22.5 percent) patients, pelvic abscess in 2 (3 percent) patients, and colostomy necrosis in 1 (1.6 percent) patient. Late complications were colostomy stricture in 7 (11.8 percent) patients, perineal sinus tract in 4 (6.7 percent) patients, and mucosal prolapse in 12 (20 percent) patients. Satisfactory continence (complete continence to stool and incontinence to gas) at 6 and 12 months was achieved in 30 (55.6 percent) and 27 (59 percent) patients, respectively. Patient satisfaction was noted in 85 percent. CONCLUSION: Continent perineal colostomy can serve as an alternative to conventional iliac colostomy. Most patients were satisfied. The modest complication rate can be minimized with patient selection.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-4475
    Keywords: Pyrano[3,2-c]quinoline-alkaloids ; 4-Hydroxyquinoline-2-ones ; Alkylation ; Phase-transfer-catalysis ; Sigmatropic rearrangement ; “Späth type” chromene synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The pyrano-cyclisation of 4-hydroxy-(1-methyl)-1H-quinoline-2-one with 3-chlor-3-methylbut-1-yne, supposed to proceed via an ether or vinyl intermediate, is studied by alkylating different 4-hydroxyquinolines. The nine derivatives characterized favour the ether-pathway (“Späth type” chromene synthesis).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 54 (1992), S. 204-207 
    ISSN: 1432-0630
    Keywords: 73.60 ; 78.70 ; 68.55
    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 optical spectral response between 340–860 nm and electrical conductivity measurements were made on thermally evaporated gold films in the thickness range 50–130 Å in order to identify optimal properties for their use as the top layer of MIS solar cells. Films of lower evaporation rate and thickness range 70–100 Å were found to have high transmittance and low reflectance, which is desirable for the above purpose. Films thinner than 70 Å had poor electrical conductivity and thicker than 100 Å had poor solar transmittance, hence were rejected. Improved transmittance and conductivity were obtained upon annealing the film at 250°C for about two hours.
    Type of Medium: Electronic Resource
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