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  • 1985-1989  (1)
  • 1965-1969  (1)
  • Inorganic Chemistry  (1)
  • Interstitial light delivery  (1)
  • 1
    ISSN: 1435-604X
    Keywords: Photodynamic therapy ; Diffusing fibre tips ; Interstitial light delivery ; Light dosimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract Optimal delivery of light to the tumour is of considerable importance in photodynamic therapy. The most effective way of delivering laser light to the tumour tissue is through an implanted optical fibre. In order to investigate the possible effects taking place at the tips of fibres implanted in tissue, fibres were used to deliver light to human blood and the transmission of light by the blood was measured at different power levels. The maximum power level which could be delivered without charring or coagulation at the fibre tip was measured for five different fibres. Three plane cut fibres and two with 1.5 cm long diffusing tips were studied. Charring and coagulation, which resulted in practically no light being delivered more than 0.5 mm from the fibre tip, were observed at relatively low-output powers (70-130 mW) for all the plane-cut fibres. This is less than the level required to deliver a clinically useful dose in a reasonable time. In contrast, neither charring nor coagulation was observed at the diffusing tips for output powers up to 1.1 W and consequently these should be the fibres of choice for interstitial photodynamic therapy. Observed changes in light transmission through the blood with increasing output power indicate that, for accurate light dosimetry, a means of monitoring delivered light in vivo during photodynamic therapy is essential.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 342 (1966), S. 297-306 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The RAMAN spectrum and the IR spectrum in the range 500-4000 cm-1 of liquid 1,8,10,9-triazaboradecaline were recorded. Major frequencies were assigned by comparing the data with the IR spectra of the corresponding N-dideuterated and 10B-labeled derivatives and by taking into consideration the expected vibrational spectrum of the compound. In accordance with the PMR spectrum, the structure of 1,8,10,9-triazaboradecaline as a bicyclic B-N-C system was confirmed; the bonding situation is discussed briefly.
    Notes: Vom 1,8,10,9-Triazaboradekalin wurde im flüssigen Zustand das RAMAN-Spektrum und das IR-Spektrum von 500-4000 cm-1 aufgenommen. Durch Vergleich mit den IR-Spektren der entsprechenden N-dideuterierten und 10B-markierten Verbindung und Berücksichtigung des Erwartungsspektrums wird eine Zuordnung zu den Grundschwingungen durchgeführt. In Übereinstimmung mit dem 1H-Kernresonanzspektrum wird die Struktur der Verbindung als bicyclisches Bor-Stickstoff-Kohlenstoff-System bestätigt. Die Bindungsverhältnisse werden kurz diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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