Bibliothek

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 2000-2004  (3)
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 885-887 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Ab initio calculations were performed to investigate adsorption and diffusion of C on the Si(001) surface at different surface and subsurface sites. Incorporation mechanisms of both substitutional and interstitial C during film deposition and growth were proposed. A surface diffusion process resulting in interstitial C incorporation was identified and the calculated energy barrier of ∼1.0 eV is consistent with the experimental value of 0.94±0.04 eV. The results support experimental observations of several groups: higher growth rates and lower temperatures favor the substitutional C incorporation. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background : An increasing proportion of the general population across the Western World now survives to an advanced age. However, there is limited data on the outcome of therapeutic endoscopic retrograde cholangiopancreatography in patients above 90 years of age with severe acute cholangitis.Aim : To determine the relative frequency of postendoscopic retrograde cholangiopancreatography complication in this group of patients.Methods : The postendoscopic retrograde cholangiopancreatography complications related outcome of 64 patients aged 90 years and above (Group 1) with severe acute cholangitis were retrospectively compared with 165 patients under the age of 90 years (Group 2).Results : The postendoscopic retrograde cholangiopancreatography complication rate was 4.7% (three patients) in Group 1 and 7.3% (12 patients) in Group 2. There was no significant difference in the postendoscopic retrograde cholangiopancreatography complication rate between the two groups (P = 0.567). The relative frequency of 30-day mortality was 7.8% (five patients) in Group 1 and 4.2% (seven patients) in Group 2 (P = 0.227).Conclusion : Urgent biliary decompression with endoscopic retrograde cholangiopancreatography in patients 90 years of age and older with severe acute cholangitis is a safe and effective procedure in the hands of highly skilled endoscopists and is not associated with increased morbidity or mortality even in this group of high risk patients.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Aim : To compare the clinico-pathological features of hepatitis B virus-related hepatocellular carcinoma in young and old patients.Methods : The clinico-pathological characteristics of hepatitis B virus-related hepatocellular carcinoma were compared in 1863 consecutive patients (121 patients, ≤40 years; 1742 patients, 〉 40 years) seen at a single institution over the last 13 years.Results : Young patients presented more often with pain (P 〈 0.0001), hepatomegaly (P = 0.01) and ruptured hepatocellular carcinoma (P = 0.02), whereas old patients presented with ankle oedema (P = 0.001), ascites (P = 0.002) and by routine screening (P = 0.035). Liver function, Child–Pugh grading and indocyanine green test were better preserved in young patients. They also had a higher α-foetoprotein concentration (P = 0.001), larger tumour size (P = 0.001) and more frequent metastasis (P = 0.008), but a similar surgical resection rate (33.6% vs. 28%), to old patients. There was no difference between the two groups in the overall post-resection survival rate, but there was a shorter survival in young patients with unresectable disease (3.6 months vs. 4.6 months, P = 0.004).Conclusion : Young patients with hepatocellular carcinoma often show a later presentation, but a higher resectability rate and similar survival rates, than old patients. The screening programme should include young hepatitis B virus carriers, even in the absence of cirrhosis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...