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  • 35.10  (1)
  • Cyanobacteria  (1)
  • High risk  (1)
  • Key words MR imaging  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Magnetresonanztomographie ohne und mit Gadolinium-DTPA zur Beurteilung von Nierentransplantaten (1997)
    Springer
    Der Radiologe 37 (1997), S. 225-232 
    Details
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Magnetresonanztomographie ; Nierentransplantate ; Kontrastmittel ; Key words MR imaging ; Renal allografts ; Contrast medium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Purpose: To determine the value of MR imaging in differentiating the various causes of human renal allograft dysfunction. Methods: A total of 123 human renal allografts (normal n = 20, acute rejection n = 57, acute tubular necrosis n = 14, interstitial fibrosis n = 11, chronic allograft glomerulopathy n = 11, cyclosporine nephrotoxicity n = 3, cortical necrosis n = 7) were investigated by means of MR imaging. Axial T1-weighted spin-echo images and coronal T1-weighted gradient-echo images were obtained before and after Gd-DTPA injection. Diagnostic parameters included corticomedullary contrast and allograft size and shape on the pre-contrast sequences. Results: None of the diagnostic parameters used could differentiate among the various diagnostic groups. Diagnosis of cortical necrosis could be made only on post-contrast scans. Contrast-enhanced scans were superior to pre-contrast images in detection of focal allograft lesions. Otherwise, contrast-enhanced scans did not provide any more information than pre-contrast studies. Spin-echo and gradient-echo sequences displayed the same diagnostic value. Conclusions: MR imaging has a limited value in differentiating the various causes of renal allograft dysfunction.
    Notes: Zusammenfassung Um den Stellenwert der MRT bei der Klärung der Fehlfunktion von Nierentransplantaten zu untersuchen, wurden 123 menschliche Nierentransplantate (unauffällig: n = 20, akute Rejektion: n = 57, akute tubuläre Nekrose: n = 14, interstitielle Fibrose: n = 11, Transplantatglomerulopathie: n = 11, Cyclosporinschaden: n = 3, kortikale Nekrose: n = 7) MR-tomographiert. An einem 1,5-T-Gerät wurden axiale T1-gewichtete Spinecho- und koronare T1-gewichtete Gradientenechoaufnahmen vor und nach Gabe von Gd-DTPA akquiriert. Als Beurteilungskriterien wurden der kortikomedulläre Kontrast sowie die Größe und Form des Transplantatorganes in der Nativuntersuchung herangezogen. Keines der Kriterien ermöglichte die Differenzierung der verschiedenen Diagnosegruppen. Abgesehen von der kortikalen Nekrose, die nur anhand der kontrastmittelunterstützten Sequenzen erkennbar war, lieferte die Gd-DTPA-Applikationen für die Differenzierung der verschiedenen parenchymalen Komplikationen keine Zusatzinformationen. Beim Nachweis fokaler Parenchymläsionen war die Kontrastmittelserie der Nativuntersuchungen überlegen. Die Spinecho- und Gradientenechoaufnahmen führten zu ähnlichen Resultaten. Schlußfolgernd kann davon ausgegangen werden, daß die statische MRT bei der Klärung der Fehlfunktion einer Transplantatniere eine untergeordnete Rolle spielt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001170050203
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  • 2
    Electronic Resource
    Electronic Resource
    Gas vesicles are strengthened by the outer-surface protein, GvpC (1992)
    Springer
    Archives of microbiology 157 (1992), S. 229-234 
    Details
    ISSN: 1432-072X
    Keywords: Cyanobacteria ; Gas vesicles ; Protein reassembly ; Anabaena flos-aquae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The critical collapse pressure of gas vesicles isolated from Anabaena flos-aquae decreased from 0.557 to 0.190 MPa when GvpC, the hydrophilic 22 kDa protein present on the outer surface of the gas vesicle, was removed by rising in 6 M urea. Recombinant GvpC was purified from inclusion bodies, produced in an E. coli strain containing an expression vector bearing the gene ecoding GvpC from A. flos-aquae, and then solubilised in 6 M urea. This recombinant GvpC became bound to gas vesicles that had been stripped of their native protein, when the urea was removed by dialysis; the amount which bound increased with the concentration of GvpC present. The critical pressure of these reconstituted gas vesicles increased to 0.533 MPa, 96% of the original value. These results indicate that the function of GvpC is to increase the strength of the structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00245155
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  • 3
    Electronic Resource
    Electronic Resource
    Tacrolimus and cyclosporine efficacy in high-risk kidney transplantation (1998)
    Springer
    Transplant international 11 (1998), S. S73 
    Details
    ISSN: 1432-2277
    Keywords: Key words Tacrolimus ; Cyclosporine ; Kidney transplantation ; High risk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The efficacy and safety of tacrolimus- and cyclosporine-based immunosuppressive regimens were compared in a prospectively defined subgroup of kidney transplant recipients from the European, open, multicentre, 2 : 1 randomised, parallel group study. Patients were stratified as high risk for immunological events if they had a panel-reactive antibodies grade greater than 80 % and/or a previous transplant functional for less than 1 year. The primary efficacy variables evaluated were the incidence of acute rejection, steroid usage and patient and graft survival. Safety was assessed based on adverse events and laboratory evaluations. At 1 year, the tacrolimus group (n = 22) had a lower incidence of biopsy-proven acute rejection (31.8 %) and a higher graft survival (86.0 %) than the 11 patients in the cyclosporine group (54.5 % and 72.0 %, respectively). The frequencies of adverse events were similar between the two groups. The tacrolimus regimen appears more beneficial for high risk patients than cyclosporine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00014036
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  • 4
    Electronic Resource
    Electronic Resource
    Fine structure and hyperfine structure in the excited configuration 5p 26s of the antimony I spectrum (1986)
    Springer
    The European physical journal 1 (1986), S. 151-156 
    Details
    ISSN: 1434-6079
    Keywords: 32.90 ; 32.30 ; 35.10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By optical interference and VUV spectroscopy the doublet system of SbI 5p 26s was investigated, so that now the hyperfinestructure of all 8 levels of 5p 26s (A- andB-splitting constants) are known. From the analysis we receive a spin-orbit parameter ζ5p =3,538(57) cm−1 and from the hyperfine-analysis single electron splitting constantsa 5p 01 =52.4(4.6),a 5p 10 =−1.6(7.3),a 5p 12 =72.3(2.3),a 6s 10 =91.7(4.1),b 5p 02 =−49.6(1.1) andb 5p 11 =30.4(3.2) (all values in mK). For all calculations in the fs- and hfs-analysis the 5p 26s 2 D 3/2 has to be excluded (see discussion). With the figures given above the quadrupole moment121 Q(5p 26s)=−0.44(3) barn was obtained. It is in good agreement with the121 Q(5p 3). For the core-polarization by the 5p electron in the innerfieldns-shells (n=1, 2, 3, 4, 5) and the unpaired 6s electron a field of +500(300) kG was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436548
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