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  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 2841-2850 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel spectroscopy technique based on modulated photoconductivity measurements with varying illumination level has been applied to investigate the capture coefficients and the energy distribution of defect states in undoped amorphous silicon. From the experimental data, charged and neutral defect distributions are clearly resolved according to their own capture coefficients. The carrier capture process as well as the defect formation mechanism are both quantitatively discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Nous avons examiné rétrospectivement les résultats de l'hypothermie combinée à l'irradiation et à la chimiothérapie (HCR) préopératoire chez des malades présentant un adénocarcinome du rectum. Nous avons comparé deux groupes de patients: groupe A 23 malades ont été traités chirurgicalement entre 1986 et 1988 et ont reçu HCR; groupe B (contrôle) 48 malades ont été traités avec la chirurgie seule ou la chirurgie plus chimiothérapie entre 1980 et 1985. Les taux de récidives dans les 2 ans ont été comparés. Bien qu'il y ait eu une différence dans le temps de suivi, les deux groupes étaient comparables en ce qui concerne les facteurs pronostics variés. Les incidences de récidives locales et de métastases pulmonaires étaient nulles dans le groupe ayant reçu HCR. Dans le groupe B, par contre, les incidences étaient respectivement de 14.6% et de 10.4%. Ces différences étaient statistiquement significatives (P〈0.05). L'incidence de métastases hépatiques était la même dans les deux groupes. Tous les patients ont bien toléré HCR excepté un avec myelosuppression et qui a refusé l'hyperthemie locale en raison d'une douleur anale modérée. Il n'y a pas eu d'autre effet secondaire nécessitant l'arrêt du traitement. Ces résultats suggèrent que HCR pré=opératoire chez les patients ayant un cancer du rectum diminue la fréquence des récidives locales et la possibilité de dissémination de cellules tumorales durant l'acte chirurgical.
    Notes: Abstract We examined retrospectively the results of hyperthermia combined with irradiation and chemotherapy (HCR) prescribed preoperatively for patients with adenocarcinoma of the rectum. We compared two groups of patients: Group A: 23 were treated surgically between 1986–1988 and received HCR therapy; group B (controls) 48 were treated with surgery alone or surgery plus chemotherapy from 1980–1985. The recurrence rate within 2 years was compared. Although there was a difference in follow-up time, the two groups were comparable with regard to various prognostic factors. The incidences of local recurrence and of lung metastasis were nil in those given the HCR therapy. In group B, however, the incidences were 15% and 10%, respectively. These differences were statistically significant (P〈0.05). The incidence of liver metastasis was much the same between the two groups. All patients tolerated the HCR therapy well except for one with myelosuppression and who refused local hyperthermia because of mild anal pain. There were no other side effects requiring cessation of this treatment. These findings suggest that preoperative HCR therapy for patients with rectal carcinoma decreases the frequency of local recurrence and the likelihood of tumour cell spread during surgical procedures.
    Type of Medium: Electronic Resource
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