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  • Articles: DFG German National Licenses  (8)
  • 1995-1999  (3)
  • 1980-1984  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Investigation of the properties of plasma-enhanced chemical vapor deposited silicon nitride and its effect on silicon surface passivation (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 5885-5889 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silicon nitride films grown by plasma-enhanced chemical vapor deposition (PECVD) are used for a variety of applications in integrated circuit and solar cell industries, such as surface passivation and insulation. The objective of this article is to investigate and understand the impact of the PECVD deposition parameters on the silicon surface passivation and establish the correlation between the properties of the silicon nitride and the ensuing silicon surface recombination velocity. All the films were annealed at 350 °C for 20 min in a rapid thermal annealer after the deposition. It is shown that bonded hydrogen and positive charge in the annealed PECVD silicon nitride films have the opposite effect on the surface passivation. The surface recombination velocity decreases with the increase in the positive charge density and the decrease in the bonded hydrogen content. It is found that the deposition temperature has the most influence on achieving low surface recombination velocity. Higher deposition temperature in the range of 200–300 °C produces lower surface recombination velocity. Optimal silicon nitride deposition conditions resulted in a surface recombination velocity of 119 cm/s on 2 Ω cm p-type silicon. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367450
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  • 2
    Electronic Resource
    Electronic Resource
    Neuroendocrine effects of apomorphine in chronic schizophrenic patients under long-term neuroleptic therapy and after drug withdrawal: Relations to psychopathology and tardive dyskinesia (1984)
    Springer
    Psychopharmacology 84 (1984), S. 436-440 
    Details
    ISSN: 1432-2072
    Keywords: Chronic schizophrenics ; Long-term neuroleptic therapy ; Neuroleptic withdrawal ; Growth Hormone ; Prolactin ; Psychopathology ; Tardive Dyskinesia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The sensitivity of the dopaminergic hypothalamic pituitary system, as indicated by growth hormone (GH) release after apomorphine (0.5 mg SC), was studied in 11 chronic schizophrenic in-patients under long-term neuroleptic (NL) therapy and after 12 and 30 days' drug withdrawal. GH peak levels after a 12-day drug-free period were significantly elevated (13.1±12 ng/ml) as compared to NL therapy (4.6±6.1 ng/ml). Controls showed a significant higher mean peak GH response (13.6±10 ng/ml) compared to chronic schizophrenic patients under long-term NL therapy. The GH response of patients with symptoms of tardive dyskinesia (TD) did not differ significantly from that of patients without signs of TD. The prolactin (PRL) serum levels under long-term NL treatment were within the normal range in male schizophrenics but decreased significantly after 12 days' drug withdrawal. The data presented indicate a reduced sensitivity of the hypothalamic-pituitary dopamine receptors under long-term NL therapy. The significant increase in GH response on day 12 probably corresponds to a readjustment from a mostly blunted GH response under NL therapy back to stimulated levels of normal controls. No supersensitivity of the pituitary dopamine recpetors could be detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00555228
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Epstein-Barr virus infection after kidney transplantation (1998)
    Springer
    Transplant international 11 (1998), S. S119 
    Details
    ISSN: 1432-2277
    Keywords: Key words Epstein-Barr virus ; Kidney transplantation ; Infection ; Rejection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Besides the well-known association of Epstein-Barr virus (EBV) and lymphomas developing posttransplantation, there are only a few data concerning the prevalence of EBV antibodies (abs) in organ donors and recipients, the posttransplant development of antibody titer in the recipient population, the extent of EBV-IgM seroconversion, and the clinical and laboratory signs associated with infection. Therefore, in a retrospective analysis, we evaluated the data of 119 organ donors and 215 kidney graft recipients who received their kidney allografts between 1993 and 1995. A total of 665 sera were quantitatively tested by means of immunofluorescence assay for EBV abs against capsid (CA; IgM, IgG), early (IgG), and nuclear (IgG) antigens. Recipient sera were obtained for testing before kidney transplantation (KTx) and at post-KTx days 32, 67, and 649 (mean values). Pre-KTx all organ donors and 98.65 % of the recipients were EBV-CA-IgG positive, only in two cases was there a D+/R− (donor/recipient) combination leading to primary EBV infection. In comparison with the organ donors, in kidney graft recipients the pre-KTx IgG antibody titers (geometric mean) against EBV-CA were significantly elevated (1 : 428 vs 1 : 574; U-test). Post-KTx, EBV-CA-IgM seroconversion was observed in 29.5 % (52 out of 176) of first graft recipients and in 47.8 % (11 out of 23) of regrafted patients up to the last follow-up day 649. In 219 out of these 52 recipients, IgM abs again cytomegalovirus (CMV) could also be detected; the other 23 did not develop CMV-IgM abs. The most frequently associated clinical signs were fever (74 %), elevated aminotransferases (57 %), and deterioration of graft function (26 %). In the EBV-IgM+/CMV-IgM+ group there were significantly more rejection therapies than in the EBV-IgM+/CMV-IgM− group. With respect to the severity of EBV infections, 68 % were asymptomatic or mild, 27 % moderate, and 4 % (only 1) severe. Thus, besides the post-KTx CMV monitoring, EBV monitoring should also belong to the follow-up checks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050442
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    Paper (German National Licenses)
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  • 4
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    Unknown
    Creatio ex nihilo (1995)
    Woodstock, Md., etc : Periodicals Archive Online (PAO)
    Theological Studies. 56:3 (1995:Sept.) 605 
    Details
    ISSN: 0040-5639
    Topics: Theology and Religious Studies
    Notes: SHORTER NOTICES
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3258-1995-056-03-000036
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Frage der aktiven Rötelnimmunisierung im Wochenbett (1981)
    Springer
    Archives of gynecology and obstetrics 232 (1981), S. 534-535 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02429692
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Microvascular surgery in experimental and clinical kidney transplantation (1983)
    Springer
    International urology and nephrology 15 (1983), S. 347-357 
    Details
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An improved microsurgical technique for orthotopic rat kidney transplantation is described in detail. (1) End-to-end anastomosis of renal arteries with 7–8 interrupted 10-0 sutures. (2) End-to-end anastomosis of renal veins with 2 continuous semicircular 10-0 sutures. (3) Non-splinted end-to-end ureteric anastomosis with 4 interrupted full-thickness 11-0 sutures. (4) Simultaneous bilateral nephrectomy. Seventy transplantations were analysed. No failure due to complications of the vascular anastomoses occurred. The ureteric anastomoses were complicated by stenosis in only 5 animals (7%). The operation times for vascular anastomoses were 20 (15–24) minutes and for complete transplantation 50 (45–60) minutes. This technique seems to be less time consuming than other methods. Our method has produced a success rate of 93% with well standardized and reproducible organ quality. Preliminary clinical experiences with extracorporeal microvascular reconstruction in 4 cases of injured small polar kidney allograft arteries support the continued application in appropriate situations to increase the number of suitable donor kidneys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02082555
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  • 7
    Electronic Resource
    Electronic Resource
    The use of pediatric cadaver kidneys in renal transplantation (Experience with 97 cases and comparison with adult kidneys) (1981)
    Springer
    International urology and nephrology 13 (1981), S. 95-104 
    Details
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pediatric cadaver donors are an important pool of kidneys for human allotransplantation. Experiences with 97 transplantations of pediatric cadaveric kidneys (age: 4 months to 15 years) and comparison with 230 transplantations of adult kidneys (age: 16–25 and 40–68 years) are presented. The cumulative patient survival was similar in both groups, however, the graft survival was significantly lower in the pediatric donor group (p〈0.05). This difference was established almost exclusively within the first 3 months after transplantation. In this group the percentage of technical complications in the first month was higher (13.4%) than in the adult kidney group (6.5%). The analysis of the whole pool of harvested kidneys shows a significantly higher rate of transplanted kidneys in the pediatric group (61%) as compared with the adult group (44.7%). In both groups the mode of arterial vascular anastomosis (end-to-end or end-to-side) does not influence the graft survival. Further investigations on pediatric donor kidneys are necessary. The utilization of pediatric cadaveric kidneys for transplantation should be increased because 20–25% of all potential kidney donors are younger than 15 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02082078
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  • 8
    Electronic Resource
    Electronic Resource
    Hot isostatic pressing of beta-alumina (1980)
    Springer
    Journal of materials science 15 (1980), S. 2311-2316 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of hot isostatic pressing on the properties of sintered beta-alumina has been investigated. The mechanical strength is increased as compared with as-sintered material. The ionic resistivity is decreased by hot isostatic pressing but this has been shown to be related to the heat treatment rather than the application of pressure. The changes in mechanical and electrical properties are related to changes in ceramic microstructure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552321
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    Paper (German National Licenses)
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