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  • 1
    ISSN: 1432-0649
    Schlagwort(e): 42.55.Ks
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Intracavity second-harmonic generation of continuous-wave chemical oxygen-iodine laser emission has been studied. A chemical oxygen-iodine laser with a maximum fundamental-wave output power of about 10 W in a concentric cavity was used. Experiments were performed for three types of optical cavities using an 1 cm LBO crystal. Second-harmonic output of 12.4 W, 6.2 W, and 5.2 W, effective extraction efficiencies of 155.0% 65.9%. and 55.3%, and single-pass conversion efficiencies of 0.615%, 0.685%, and 0.655% were obtained for the respective cavities. A comparison of these results of coupling by frequency doubling with the results of fundamental-wave output coupling of this system is also presented.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-1238
    Schlagwort(e): Key words Hepatocyte growth factor (HGF) ; Pneumonectomy ; Lung growth ; Human
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Objective: Proliferation of alveolar type II cells is thought to be critical for the restoration of lung function after diffuse alveolar damage or pneumonectomy. However, the factors that regulate alveolar type II cell proliferation, and the mechanism that brings about compensatory lung growth are not well understood. Hepatocyte growth factor (HGF) has been shown to have hepatotrophic and nephrotrophic functions for regeneration of the liver and kidney. We have attempted to investigate the involvement of HGF in lung regeneration after lung resection. Desgin: A prospective, controlled study. Setting: Adult surgical patients in a university hospital. Patients and measurements: We measured serum HGF levels in eight patients undergoing major lung resection, and in five patients undergoing mastectomy as controls, by using radioimmunoassay and an enzyme-linked immunosorbent assay. Results: In all cases of pneumonectomy, the serum HGF levels increased 3- to 5-fold at 1–3 days (with a peak at 3 days) after operation, and then decreased to nearly basal levels in 2 weeks. However, these levels in patients undergoing mastectomy did not change much over the first 2 weeks, postoperatively. Conclusions: Serum HGF levels increased in patients after major lung resection, which suggests that HGF might play an important role in lung regeneration or compensatory lung growth in humans.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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