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  • Polymer and Materials Science  (2)
  • Key words Trilateral retinoblastoma  (1)
  • 1
    ISSN: 1432-1920
    Keywords: Key words Trilateral retinoblastoma ; Pineal ; Magnetic resonance imaging ; Computed tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The medical records, CT, and MRI of ten children with trilateral retinoblastoma were reviewed. The intracranial pathology consisted of eight pineal neoplasms and two parasellar lesions, at least seven of the which were calcified. Two lesions demonstrated calcification only (no soft tissue mass) at initial presentation. Hydrocephalus was seen in eight cases, and concurrent or subsequent subarachnoid dissemination was documented in seven. Only one patient is known to be alive at the present time. The imaging features of the midline intracranial tumors mirror those of the ocular neoplasm. As calcification may be the only clue to the presence of the intracranial malignancy, close surveillance of high-risk patients with retinoblastoma with initial CT and follow-up MRI is suggested.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 122 (1969), S. 134-144 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Cellulose wurde mit ultraviolettem Licht bestrahlt. Der Abbau wurde viskosimetrisch und durch Messung des Gewichtsverlustes verfolgt. Veränderungen in Polymerisationsgrad und Gewicht des bestrahlten Materials deuten darauf hin, daß der Abbau statistisch nach einer Reaktion erster Ordnung verläuft. Es wird die Möglichkeit erwogen, daß Kettenspaltung der primäre Prozeß ist, der Glucose und Oligosaccharide liefert. Gaschromatographie der flüchtigen Abbauprodukte zeigt die Anwesenheit von Acetaldehyd, Propionaldehyd, Ameisensäuremethylester, Aceton, Methanol, äthanol, Methan und äthan, die in früheren Arbeiten nicht erwäfhnt sind. Diese Verbindungen sind möglicherweise durch weiteren Abbau der Glucose und der Oligosaccharide entstanden.
    Notes: Cellulose has been irradiated by ultraviolet light. The degradation was followed viscometrically and by weight loss measurements. The changes in the degree of Polymerization and weight of the irradiated material indicated that the degradation is random and follows first order kinetics. It is suggested that chain scission is the primary process yielding glucose and oligosaccharides. Gas chromatography of the volatile products indicated the presence of acetaldehyde, propionaldehyde, methyl formate, acetone, methanol, ethanol, methane and ethane which have not been reported in earlier studies. These compounds could result from further degradation of glucose and oligosaccharides formed during the initial chain scission process.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 8 (1970), S. 839-842 
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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