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  • 1
    Electronic Resource
    Electronic Resource
    Primary bronchogenic carcinoma in recipients of heart transplants (1997)
    Springer
    Transplant international 10 (1997), S. 312-316 
    Details
    ISSN: 1432-2277
    Keywords: Key words Bronchogenic carcinoma ; heart transplantation ; Heart transplantation ; bronchogenic carcinoma ; Immunosuppression ; bronchogenic carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract With the exception of carcinomas of the skin and lip, carcinoma of the bronchus is the most common carcinoma that afflicts recipients of solid organ grafts. Of 859 tumors occurring in 830 recipients of thoracic organs reported to the Cincinnati Tumor Transplant Registry, 242 were carcinomas and 68 of these were bronchogenic carcinomas, which therefore made up 8 % of the overall total. There are, however, relatively few reports of heart transplant patients with bronchogenic carcinoma in the literature. We present details of four patients who developed this malignancy out of a total of 196 patients who survived and have been followed up for more than 3 months at our center, an incidence of 2 %. The mean period from the time of transplant to diagnosis of malignancy was 58 months (range 11–82 months). The histology was squamous or anaplastic in three cases, and adenocarcinoma in one. Immunosuppressive therapy was reduced in all cases. Resection was carried out in two patients (both of whom died 6 and 11 months later, respectively), resection was combined with chemotherapy and radiation in one patient (alive 15 months later), and therapy consisting of radiation alone was given to one patient (died within 1 month). We conclude that bronchogenic carcinoma is relatively common in patients with heart transplants and that it has a poor prognosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050062
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  • 2
    Electronic Resource
    Electronic Resource
    Thermolysis of polyethylene/polystyrene mixtures (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 60 (1996), S. 2133-2140 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The thermolysis of 60/40 mixtures of polyethylene (PE) and polystyrene (PS) was investigated at temperatures below 440°C. Liquid yield from the mixture, 84.1%, was comparable to yields obtained with the individual polymers. The yields of styrene monomer, 57.1%, and α-olefins, 27.7%, increased over those obtained when the polymers were processed individually. A significant interaction was observed between the polymers in which the addition of PS enhanced the rate of thermolysis of PE. It is proposed that this enhancement was due to the abstraction of hydrogen from the PE fraction by polystyryl radicals. The result of this effect is to increase the rate of volatile production from the PE and increase the solubility of the residue in chloroform. The data also support a mechanism for dimer production other than the generally accepted 1,3 transfer. © 1996 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Thermolysis of polystyrene (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 58 (1995), S. 843-851 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Styrene was recovered from polystyrene (molecular weight of 138,000) by thermolysis in a nitrogen atmosphere at temperatures between 368 and 407°C. The results were independent of the initial weight of polystyrene, which was varied between 30 and 480 g. Up to 90% of the polystyrene was converted to liquid products. The liquid products had a styrene concentration as high as 90% and the styrene yield increased with temperature. Above 390°C, the residue left in the reactor (less than 30% of initial polystyrene charge) consisted mainly of styrene monomer, dimer, and trimer (MW of 190). The kinetics support a first-order reaction with regard to the rate of production of volatiles. The activation energy was estimated to be 166.5 kJ/mol. © 1995 John Wiley & Sons, Inc.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1995.070580501
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