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  • 1990-1994  (3)
  • Magnetic resonance imaging  (1)
  • Methane  (1)
  • Papillary carcinoma  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Oxidative coupling of methane over CaO-MgO mixed oxide (1990)
    Springer
    Catalysis letters 4 (1990), S. 241-244 
    Details
    ISSN: 1572-879X
    Keywords: Methane ; oxidative coupling ; oxide ; MgO ; CaO
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mixed oxide catalyst prepared by co-precipitating magnesium oxide and calcium oxide showed an excellent activity for the oxidative coupling of methane. The high performances were presumed to arise from the high basicity of the mixed oxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00765940
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rat urinary bladder carcinomas induced by N-butyl-N-(4-hydroxybutyl)-nitrosamine and N-methyl-N-nitrosourea (1990)
    Springer
    Urological research 18 (1990), S. 323-326 
    Details
    ISSN: 1434-0879
    Keywords: N-butyl-N-(4-hydroxybuty)nitrosamine ; N-Methyl-N-nitrosourea ; Rat bladder carcinogenesis ; Papillary carcinoma ; Non-papillary carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The present investigation was conducted to examine the combination effect of N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN) and N-methyl-N-nitrosourea(MNU) in rat urinary bladder carcinogenesis. Experiment 1 was performed in the groups treated by oral BBN administration in combination with MNU intraversical instillation and their control groups. In the groups given both BBN and MNU, the ratio of rats with the nonpapillary type to carcinoma-bearing rats was significantly higher than in the controls. Since most of the carcinomas were non-invasive, the observation period was prolonged in the groups given both BBN and MNU in experiment 2. However, even after a longer observation period, no invasive carcinoma was observed. These results suggest that high-grade and invasive carcinomas similar to those induced by BBN and MNU in the heterotopically transplanted rat bladder cannot be induced in the natural bladder of the rat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300780
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic resonance imaging of ganglion cell tumours (1993)
    Springer
    Neuroradiology 35 (1993), S. 181-184 
    Details
    ISSN: 1432-1920
    Keywords: Magnetic resonance imaging ; Lhermitte-Duclos disease ; Ganglioglioma ; Gd-DTPA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The MRI and CT studies of four patients with ganglion cell tumours, one with a cerebellar gangliocytoma (Lhermitte-Duclos disease), and three with gangliogliomas are reported. MRI in Lhermitte-Duclos disease clearly demonstrated a mass of low signal intensity in the left cerebellum on T1-weighted spin-echo (SE) images and an area of high signal intensity with a blurred margin on T2-weighted SE images. These MRI studies were useful for delineating the lesion, which was verified at surgery. In the ganglioglioma, MRI demonstrated two isointense solid masses on T1-weighted SE images, which enhanced clearly with Gd-DTPA. The enhancement study was advantageous in planning surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588488
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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