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  • 1
    Electronic Resource
    Electronic Resource
    Living related kidney donors over 60 years old (1996)
    Springer
    Transplant international 9 (1996), S. 109-114 
    Details
    ISSN: 1432-2277
    Keywords: Kidney transplantation, elderly donors ; Advanced age donors, kidney transplantation ; Elderly donors, kidney transplantation ; Living related kidney transplantation, donor age
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The lack of available cadaveric organs for transplantation has resulted in an increased number of kidney transplants from living donors. During a period of 6 years, 149 kidney transplantations were performed from living related donors in our institute, 33.5% of whom were older than 60 years of age. In this study we examined the survival of patients and grafts as well as the graft function in 50 patients with transplants from donors over 60 years (mean age 65 years) as compared with those of 99 patients with transplants from donors younger than 60 years (mean age 47 years). There were no significant differences in the course of donor nephrectomy, postoperative complications, or remnant kidney function. However, delayed graft function occurred more frequently in recipients of transplants from older donors. Improvement in graft function was also slower in recipients of kidneys from older donors, with significant differences in serum creatinine levels observed during the first 12 months after transplantation. More frequent acute complications and more progressive chronic graft failure, irrespective of the causes, occurred during the 1st post-transplant year in recipients with grafts from older donors. Five-year patient survival (77% vs 92%) and kidney graft survival differed significantly for the same period with worse results for patients receiving grafts from older donors. It may be concluded that kidney grafts from donors older than 60 years — and especially those older than 70 years — may be used for living related kidney transplantation, but with precautions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336387
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  • 2
    Electronic Resource
    Electronic Resource
    Surface recombination in breakdown time delay experiments: Effect of different cathode materials (1996)
    Springer
    Plasma chemistry and plasma processing 16 (1996), S. 195-208 
    Details
    ISSN: 1572-8986
    Keywords: Surface recombination ; nitrogen afterglow ; breakdown time delay ; diffusion ; nitrogen atoms ; secondary electron yield ; Fe, Cu, Al, Au, Mo
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The late afterglow in nitrogen with iron electrode is studied by the breakdown time delay method, i.e., by measuring the breakdown time delay td as a function of the afterglow time τ. It is proposed that the cause of the secondary electrons initiating the breakdown is the energy of the surface recombination of nitrogen atoms on the iron electrode. The gas-phase and macrokinetic diffusive models are used to describe the experimental breakdown time delay data. By fitting the theoretical curve to the experimental data: (1) it has been confirmed that the recombination on the molybdenum glass is of the second order and the value of the surface recombination coefficient is determined at 4 mbar; (2) it has been shown that the surface recombination on the iron electrode is of the second order, and the effective recombination coefficients are determined; (3) the analytical form of the recombination coefficient as a function of the adsorption characteristics of surfaces and the pressure of the parent gas has been derived. In addition, the orders of surface recombination on the molybdenum-, aluminum-, and gold-plated electrode were determined by the same method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570178
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    Paper (German National Licenses)
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