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  • Organic Chemistry  (4)
  • Abnormal urinary tract  (2)
  • ESR spectroscopy  (2)
  • Magnetic resonance imaging  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Lhermitte-Duclos disease associated with syringomyelia (1996)
    Springer
    Neuroradiology 38 (1996), S. 529-531 
    Details
    ISSN: 1432-1920
    Keywords: Key words Lhermitte-Duclos disease ; Dysplastic gangliocytoma ; Magnetic resonance imaging ; Syringomyelia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 23-year-old man presented with a 2-week history of intracranial hypertension. CT showed a large, nonenhancing cerebellar mass with surrounding calcification and displacement of the fourth ventricle. MRI revealed a septate lesion, with low signal on T1-weighted and high signal on T2-weighted images. The cerebellar tonsils were displaced below the foramen magnum and there was associated syringomyelia. The MRI features were characteristic of Lhermitte-Duclos (LD) disease (dysplastic gangliocytoma) and the diagnosis was confirmed following surgery. In this case, we emphasise the usefulness of MRI in the diagnosis of LD disease and consider the possible pathogenesis of the associated syringomyelia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626089
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  • 2
    Electronic Resource
    Electronic Resource
    Lhermitte-Duclos disease associated with syringomyelia (1996)
    Springer
    Neuroradiology 38 (1996), S. 529-531 
    Details
    ISSN: 1432-1920
    Keywords: Lhermitte-Duclos disease ; Dysplastic gangliocytoma ; Magnetic resonance imaging ; Syringomyelia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 23-year-old man presented with a 2-week history of intracranial hypertension. CT showed a large, nonenhancing cerebellar mass with surrounding calcification and displacement of the fourth ventricle. MRI revealed a septate lesion, with low signal on T1-weighted and high signal on T2-weighted images. The cerebellar tonsils were displaced below the foramen magnum and there was associated syringomyelia. The MRI features were characteristic of Lhermitte-Duclos (LD) disease (dysplastic gangliocytoma) and the diagnosis was confirmed following surgery. In this case, we emphasise the usefulness of MRI in the diagnosis of LD disease and consider the possible pathogenesis of the associated syringomyelia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626089
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Pediatric renal transplantation into the abnormal urinary tract (1996)
    Springer
    Pediatric nephrology 10 (1996), S. 113-120 
    Details
    ISSN: 1432-198X
    Keywords: Key words: Renal transplantation ; Abnormal urinary tract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Many children with end-stage renal disease have significant urinary tract problems other than irreversible loss of native kidney function. These significant other urinary tract problems, if not corrected prior to transplantation, may significantly increase recipient mortality, graft loss, and patient morbidity. These other urinary tract problems may cause hydroureteronephrosis in the transplanted kidney, lead to an increased incidence of graft rejection, be the source of sepsis after subsequent immunosuppression, and cause hypertension. In addition, pre-existing urinary diversion, large interabdominal masses, or previous cancer require specific pre-transplant management plans. Potential pediatric transplant recipients with other significant urinary tract problems can be classified according to three parameters: anatomical extent, pathology, and pathophysiology of the significant other problems. Particular attention must be paid to pre-existing lower tract problems. Strategy must be worked out pre transplant as to how the lower urinary tract is going to store, hold, and empty urine. The means for assessing the potential recipients and strategies and techniques for correcting pre-existing problems have been summarized in this article.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00863462
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  • 4
    Electronic Resource
    Electronic Resource
    Pediatric renal transplantation into the abnormal urinary tract (1996)
    Springer
    Pediatric nephrology 10 (1996), S. 113-120 
    Details
    ISSN: 1432-198X
    Keywords: Renal transplantation ; Abnormal urinary tract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Many children with end-stage renal disease have significant urinary tract problems other than irreversible loss of native kidney function. These significant other urinary tract problems if not corrected prior to transplantation, may significantly increase recipient mortality, graft loss, and patient morbidity. These other urinary tract problems may cause hydroureteronephrosis in the transplanted kidney, lead to an increased incidence of graft rejection, be the source of sepsis after subsequent immunosuppression, and cause hypertension. In addition, pre-existing urinary diversion, large interabdominal masses, or previous cancer require specific pre-transplant management plans. Potential pediatric transplant recipients with other significant urinary tract problems can be classified according to three parameters: anatomical extent, pathology, and pathophysiology of the significant other problems. Particular attention must be paid to pre-existing lower tract problems. Strategy must be worked out pre transplant as to how the lower urinary tract is going to store, hold, and empty urine. The means for assessing the potential recipients and strategies and techniques for correcting pre-existing problems have been summarized in this article.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00863462
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Radiation Effects on Dopamine and Norepinephrine (1997)
    Springer
    Pharmaceutical research 14 (1997), S. 1192-1196 
    Details
    ISSN: 1573-904X
    Keywords: dopamine ; norepinephrine ; radiation treatment ; ESR spectroscopy ; dosimetry ; storage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. Radiation sterilization is becoming increasingly popular for the sterilization of many pharmaceutical products. We have investigated the gamma radiation induced effects on dopamine and norepineprine by ESR spectroscopy. Results and Discussion. Equations to describe the evolution of the ESR curves versus doses and time of storage are presented. Linear regression is, for dopamine hydrochloride, applicable for doses ranging from 10 to 25 kGy. Since the radiation dose selected must always be based upon the bioburden of the products and the degree of sterility required, doses in the range 10−25 kGy could be investigated and linear regression would appear to be the least expensive route to follow and gives good results. The comportment of noradrenaline bitartrate is more complex and the use of linear regression would appear more hazardous especially for low doses. For doses higher than 25 kGy, a more general equation is required. Power function using only 2 parameters could give good results but must be validated. Decay kinetics for radicals versus storage were considered. Non-homogenous kinetics with time dependent rate constant and bi-exponential function appeared valid to reproduce the decay of radicals for, respectively, dopamine and norepinephrine. Conclusions. It is worth noting that, at present, ESR is the only technique which proved to be suitable for identification and quantification purposes in irradiated pharmaceuticals. Moreover, other features such as sensitivity, precision, ease and non-destructive readout make ESR superior to other proposed analytical techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012154823638
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  • 6
    Electronic Resource
    Electronic Resource
    Radiation Sterilization of Formoterol (1997)
    Springer
    Pharmaceutical research 14 (1997), S. 810-814 
    Details
    ISSN: 1573-904X
    Keywords: formoterol ; radiation treatment ; ESR spectroscopy ; dosimetry ; storage ; HPLC ; degradation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. Radiation sterilization is becoming increasingly popular for the sterilization of many pharmaceutical products. We have investigated the gamma radiation induced effects on formoterol fumarate by HPLC and ESR spectroscopy. Results and Discussion. Numerical simulation of the evolution of the ESR signal versus dose was performed using linear regression, quadratic fit and power function. The shape of the dosimetric curve is linear in the range 5−30 kGy. Owing to the weak number of free radicals generated during the irradiation, the accuracy of measurements is low. For a dose of 25 kGy, discriminating irradiated from unirradiated samples is possible if the storage period is less than 250 days. The comparison between chromatographic profiles of irradiated and unirradiated samples showed minor differences. Conclusions. From our preliminary results, radiosterilization of formoterol fumarate may be technically feasible. Estimation of the irradiation dose by ESR may be possible but, due to the weak number of free radicals generated during the irradiation, the accuracy of measurements appeared low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012119026422
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  • 7
    Electronic Resource
    Electronic Resource
    Azole. 22.21. Mitt.: BERNARD, M. K.; WRZECIONO, U.: Pharmazie 43 (1988) 723.. 1H- und 13C-NMR Untersuchungen an isomeren 3- und 5-Amino-pyrazol-Derivaten (1989)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 331 (1989), S. 600-610 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Azoles. 22. 1H- and 13C-N.M.R. Investigation of Isomeric-3 and 5-Amino-Pyrazole DerivativesThe 1H- and 13C-n.m.r. spectra of nine pairs of isomeric 3- and 5-amino-pyrazole derivatives 1a - 1i and 2a - 2i and some of their acetylderivatives have been assigned and discussed. It has been found that 1H- and 13C-n.m.r. spectroscopy is a useful tool for differentation of the above mentioned 3- and 5-amino-isomers.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19893310409
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  • 8
    Electronic Resource
    Electronic Resource
    Azole. 2423. Mitt.: BERNARD, M. K.; WRZECIONO, U.: J. prakt. Chem. 331 (1989) 677. Massenspektrometrische Untersuchungen an isomeren 3- und 5- Amino-pyrazol-Derivaten (1989)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 331 (1989), S. 685-689 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Azoles. 24. Mass Spectrometric Studies on Isomeric 3- and 5-Aminopyrazole Derivatives
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19893310422
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  • 9
    Electronic Resource
    Electronic Resource
    Azole. 23.22. Mitt.: BERNARD, M. K.; WRZECIONO, U.: J. prakt. Chem. 331 (1989) 600. Massenspektrometrische Untersuchungen an Derivaten der β-(Pyrazol-4-yl)acryl- bzw. -propionsäure und (Pyrazol-4-yl)methylenmalonsäure (1989)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 331 (1989), S. 677-684 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Azoles. Mass Spectrometric Studies on Derivatives of β-(Pyrazole-4-yl) Acrylic or -Propionic Acid and Pyrazole-4-yl Methylenemalonic Acid
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19893310420
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  • 10
    Electronic Resource
    Electronic Resource
    (25 S)-1α, 25, 26-Trihydroxycholecalciferol, a New Vitamin D3 Metabolite: Synthesis and Absolute Stereochemistry at C(25) (1981)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 64 (1981), S. 2138-2141 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1α, 25, 26-trihydroxy metabolite of vitamin D3, isolated from bovine serum, was shown to possess the (25 S)-configuration by HPLC. comparison of the 1, 3, 26-triacetate derivative with authentic (25 R)- and (25 S)-samples. The convergent synthesis of (25 R)-1α, 25, 26- and (25 S)-1α, 25, 26-trihydroxycholecalciferols (10a) and (10b) has been accomplished.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19810640718
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