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  • Articles: DFG German National Licenses  (12)
  • 1995-1999  (8)
  • 1970-1974  (3)
  • 1935-1939  (1)
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  • Articles: DFG German National Licenses  (12)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 777 (1996), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: Near infrared spectroscopy (NIRS) is a new technique that permits noninvasive monitoring of cerebral blood and tissue oxygenation. Recently, we and others have shown that NIRS measurements are sensitive enough to follow changes in cerebral hemoglobin oxygenation due to activation of brain function. Based on these findings we have assessed the influence of aging as well as the influence of neurodegeneration on cerebral hemoglobin oxygenation during mental work. The typical NIRS pattern in young healthy subjects while performing calculation tasks measured in the frontal cortex were increases in oxygenated hemoglobin [HbO2] and total hemoglobin [HbT] while reduced hemoglobin [HbR] decreased. Elderly healthy subjects showed a significant lower mean increase in [HbO2] and [HbT] levels. Regression analysis revealed an age-dependent decline in activation-induced local increase of [HbO2] as well as [HbT]. Furthermore, we monitored changes in cerebral hemoglobin oxygenation in the frontal cortex while patients with probable Alzheimer's disease (AD) performed cognitive tasks. Whereas elderly healthy subjects (as well as patients with major depression, age-associated memory impairments or vascular dementia) again showed clear increases in the local concentrations of [HbO2] and [HbT] during brain activation, AD patients showed significant decreases compared to the baseline levels in both variables that were most pronounced in the parietal cortex. To clarify whether the different patterns in cerebral hemoglobin oxygenation during cognitive activation were due to an altered functional brain organization in AD or to alterations in the cerebrovascular response to neuronal activation, we are currently performing simultaneous NIRS and (015-H20-)PET measurements during performance of a cognitive task (Stroop test). Our finding of a regional reduced oxygen supply during activation of brain function may be of relevance to the development and the time course of neurodegeneration.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 326 (1970), S. 239-245 
    ISSN: 1435-2451
    Keywords: Mammary neoplasms ; Sarcoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mammasarkome sind äußerst selten; sie machen etwa 0,3 bis 3% aller Brustdrüsenkrebse aus. Gemeinsames Merkmal sind die gut abgrenzbaren, indolenten, mit der Umgebung nicht verwachsenen Einzelknoten. Regionale Metastasen sind selten, wenn sie auftreten, bedeutet dies eine schlechte Prognose. Die Ansichten über die Therapie sind nicht einheitlich, empfohlen werden Tumorexstirpationen, Mastektomie, Ablatio und Radikaloperation mit Ausräumung der Axilla. Im eigenen Krankengut kamen in den letzten 10 Jahren 9 Mammasarkome zur Behandlung (8 Frauen und ein Mann). Stets wurde die Radikaloperation mit Ausräumung der Axilla und Nachbestrahlung durchgeführt. Die guten Behandlungsergebnisse scheinen dieses Vorgehen zu rechtfertigen.
    Notes: Summary The pathogenesis, clinic, treatment and prognosis of sarcoma of the mamma in brief are discussed. This report consists of nine cases of radically operated patients, who subsequently got x-ray irradiation. Five of 9 said patients survived the 5 year limit. This good result could be accreditted to our method of treatment of the sarcoma of the mamma.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1238
    Keywords: Sepsis ; Critically ill ; Septic shock ; Mortality ; Systemic inflammatory response syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objectives To determine the incidence of systemic inflammatory response syndrome (SIRS), sepsis and severe sepsis in surgical ICU patients and define patient characteristics associated with their acquisition and outcome. Design One-month prospective study of critically ill patients with a 28 day in-hospital follow up. Setting Surgical intensive care unit (SICU) at a tertiary care institution. Methods All patients (n=170) admitted to the SICU between April 1 and April 30, 1992 were prospectively followed for 28 days. Daily surveillance was performed by two dedicated, specifically-trained research nurses. Medical and nursing chart reviews were performed, and follow up information at six and twelve months was obtained. Results The in-hospital surveillance represented 2246 patient-days, including 658 ICU patient-days. Overall, 158 patients (93%) had SIRS for an incidence of 542 episodes/1000 patients-days. The incidence of SIRS in the ICU was even higher (840 episodes/1000 patients-days). A total of 83 patients (49%) had sepsis; among them 28 developed severe sepsis. Importantly, 13 patients had severe sepsis after discharge from the ICU. Patient groups were comparable with respect to age, sex ratio, and type of surgery performed. Apach II score on admission to the ICU and ASA score at time of surgery were significantly higher (p〈0.05) only for patients who subsequently developed severe sepsis. The crude mortality at 28 days was 8.2% (14/170); it markedly differed among patient groups: 6% for those with SIRS vs. 35% for patients with severe sepsis. Patients with sepsis and severe sepsis had a longer mean length of ICU stay (2.1±0.2 and 7.5±1.5, respectively) than those with SIRS (1.45±0.1) or control patients (1.16±0.1). Total length of hospital stay also markedly differed among groups (35±9 (severe sepsis), 24±2 (sepsis), 11±0.8 (SIRS), and 9±0.1 (controls, respectively). Conclusions Almost everyone in the SICU had SIRS. Therefore, because of its poor specificity, SIRS was not helpful predicting severe sepsis and septic shock. Patients who developed sepsis or severe sepsis had higher crude mortality and length of stay than those who did not. Studies designed to identify those who develop complications of SIRS would be very useful.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 22 (1996), S. 616-617 
    ISSN: 1432-1238
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Der Internist 38 (1997), S. 411-419 
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Endothel ; Endothel ; Stockstoffmonoxid ; Gefäßendothel ; Stickstoffmonoxid ; Stickstoffmonoxid ; ERDF ; NO ; Endothel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Das Gefäßendothel, das in direktem Kontakt zum Blut steht, ist keinerswegs eine inerte Zellschicht sondern ein hochaktives Gewebe, das für die Regulation des Gefäßtonus, des Blutdrucks, der Blutgerinnung und der Fibrinolyse wichtigste Funktionen erfüllt. Man geht von ca. 1013 Endothelzellen mit einem Gesamtgewicht von 1,5 kg und einer von Endothel bedeckten Fläche von ca. 6000 m2 aus. Die wichtigste Substanz, die das Endothel freisetzt, dürfte das Stickstoffmonoxid (NO) sein, das bis zur Identifizierung dieser Verbindung auch als ERDF (endothelium derived relaxing factor) bezeichnet wurde. Diese Übersichtsarbeit hat die NO-Wirkung bei endothelialer Dysfunktion zum Inhalt, der besonders im Rahmen kardiovaskulärer Erkrankungen eine wichtige Rolle zukommt. Unter diesem Blickwinkel werden auch in der Therapie bereits bewährte sowie neue Medikamente hinsichtlich ihrer Wirkung auf das Endothel und die NO-Wirkung bewertet.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 9 (1998), S. 109-113 
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract TiC, TiCN, Pd, W and Ti were investigated as diffusion barriers between the contact material Ti3SiC2 and the Au-metallization for high temperature stable contact systems on SiC. The barrier materials TiC, TiCN, Pd, W and Ti were studied by thermally stressing the contact multilayer structures, followed by morphological scanning electron microscopy (SEM) analysis and electrical characterization of the contact resistance. At 600 °C, TiC and TiCN prevent a failure of the contact system for up to 18 h compared with 10 min without a diffusion barrier. Palladium hinders decomposition of the metallization for up to 90 h. Ti and W are not useful as diffusion barrier materials in this contact system. The results are related to phase equilibrium and reaction diffusion studies in the relevant materials system. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 9 (1998), S. 103-107 
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this study, three different metals (Au, Al, and Pd) were investigated as possible metallization layers on top of titanium based electrical contacts on 6H-SiC. Experiments involved thermal stressing of contact structures and its effect on electrical and morphological contact properties. Gold proved to be stable up to 300 °C with good electrical properties. At 600 °C the films disintegrate within a matter of hours. Aluminium films are stable at 600 °C but the electrical contact resistance increases with annealing time. Palladium films are electrically and chemically stable at 600 °C. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 157 (1996), S. 259-267 
    ISSN: 1573-4919
    Keywords: endothelium ; endothelin ; endothelin receptor antagonist
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Endothelin-1 is a recently discovered peptide mainly released from endothelial cells. Hypoxia and ischemia as well as numerous factors such as angiotensin 11, thrombin and transforming growth factor β1 stimulate the fomation of the peptide. On the other hand the synthesis of endothelin is inhibited by nitric oxide and atrial natriuretic peptide via the formation of cyclic guanosine monophosphate. Released from endothelial cells endothelin-1 mediates transient vasodilation followed by a profound and longlasting vasoconstriction. Endothelin is also a mitogen for smooth muscle proliferation. Endothelins exert their biological effects via activation of specific receptors. Two different receptors have been cloned from mammalian tissues (ETA and ETB receptors). On vascular smooth muscle cells both receptors mediate contractions. Endothelial cells only express ETB receptors linked to the formation of nitric oxide and/or prostacyclin formation. Increased plasma concentrations of endothelin-1 have been described in a variety of diseases such as pulmonary hypertension, arteriosclerosis, renal failure, acute coronary syndromes, heart failure, migraine and vascular diseases. Recently an increasing number of endothelin receptor antagonists have been synthetized, which have been shown to inhibit endothelin-mediated vasoconstriction. Clinical studies are now ongoing to elucidate the pathophysiologic role of endothelin and the potential benefit of the blockade of the system in different disease states.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The bacteriology of explanted prosthetic hips and surrounding soft tissue was studied in 52 patients undergoing surgical revision for joint loosening. In a prospective four-year study, positive bacterial cultures were recorded in 34 (76%) patients. Coagulase-negative staphylococci were the predominant isolates, and 11 patients (33%) had more than three organisms isolated, 7 (20%) had two only, and 11 (33%) had one species. Among the 23 patients from whom specimens from all 11 predetermined anatomic sites were cultured, the highest frequency of positive cultures (52% and 47%) came from the shaft and capsular tissue, respectively. Organisms were less frequently recovered from the cement and acetabulum (13% and 4%, respectively). Using molecular typing in eight patients with paired isolates of the same species, clonal identity was found in four. An additional patient underwent a second revision for loosening 17 months after the first revision and the same clone ofStaphylococcus epidermidis was isolated on both occasions.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 327 (1970), S. 527-529 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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