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  • Articles: DFG German National Licenses  (13)
  • Polymer and Materials Science  (8)
  • 25.30.Dh  (3)
  • Akute Pankreatitis  (2)
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  • Articles: DFG German National Licenses  (13)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 336 (1990), S. 159-178 
    ISSN: 1434-601X
    Keywords: 21.60.-n ; 25.30.Dh ; 27.40.+z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract With high-resolution inelastic electron scattering measurements on46Ti and48Ti the excitation mechanism of the transition into low lying Jπ=1+ states is investigated. The experimental evidence of considerable contribution of the orbital part of theM1 operator to the total transition strength is given by a model dependent analysis of form factors. The possibility of physical relationship to low lying Jπ=1+ states in the rare earth nuclei is discussed in various models. MoreoverE2 form factors and good candidates forM3 form factors are presented.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-601X
    Keywords: 21.10.Pc ; 25.30.Dh ; 24.50.+g ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The12C(e, e'p)11B g.s reaction has been measured in parallel and anti-parallel kinematics over ap m range of −120〈p m〈120 MeV/c at a centralT p of 90 MeV. In contrast to previous measurements at NIKHEF, both kinematics can be described without enhancement of the transverse form factor of the bound proton (η=0.98(5)). The spectroscopic factor for this transition as determined with the new Mainz data (S α =1.54(5)) is 22% smaller than the NIKHEF value.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 382 (1997), S. 367-372 
    ISSN: 1435-2451
    Keywords: Key words Procalcitonin ; Clinical application ; Sepsis ; Acute pancreatitis ; Schlüsselwörter Prokalzitonin ; Klinische Applikation ; Sepsis ; Akute Pankreatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Prokalzitonin (PCT) ist ein Protein, welches bei systemischen Infektionen mit Bakterien, Pilzen und Protozoen in erhöhter Konzentration im Blut nachgewiesen werden kann. Bei operativen Traumen steigt PCT im Gegensatz zu den klassischen Akute-Phase-Proteinen, wie C-reaktivem Protein oder Interleukin-6, nicht oder nur marginal an. Somit ist es möglich, mit Hilfe eines Laborparameters systemische Infektionen postoperativ zu erkennen. In dieser Arbeit werden aus heutiger Sicht die vermuteten Induktionsmechanismen der PCT-Synthese durch Zytokine und bakterielle Endotoxine dargestellt. Außerdem werden klinische Anwendungen der PCT-Messung mit Beispielen aus der Abdominal- und Transplantationschirurgie vorgestellt. In eigenen Untersuchungen konnten wir am Aufnahmetag bei 8 Patienten mit nekrotisierender Pankreatitis einen PCT-Mittelwert von 6,9 ng/ml messen. Weitere 7 Patienten mit ödematöser Pankreatitis wiesen einen PCT-Mittelwert von nur 0,67 ng/ml auf. Trotz des deutlichen Unterschieds in den Mittelwerten konnte keine statistisch signifikante Differenz zwischen Normalwerten und nekrotisierender Pankreatitis einerseits oder Normwerten und ödematöser Pankreatitis andererseits festgestellt werden. Die Ursache hierfür lag in der großen Streubreite der PCT-Werte in der Gruppe mit nekrotisierender Pankreatitis (0,33 – 32,9 ng/ml). Diese große Variation der Werte ist möglicherweise dadurch bedingt, daß nur ein Teil der Patienten schon frühzeitig eine bakterielle Superinfektion der Nekrose mit konsekutiver PCT-Erhöhung aufwies. Wir vermuten, daß eine Unterscheidung zwischen superinfizierter nekrotisierender Pankreatitis einerseits und nekrotisierender steriler Pankreatitis bzw. ödematöser Pankreatitis andererseits mittels PCT-Messungen möglich ist, jedoch sind größere Studien mit einer mikrobiologischen Untersuchung des nekrotischen Materials und Blutkulturen notwendig, um den endgültigen Stellenwert der PCT-Bestimmung im klinischen Alltag, besonders in der Prognoseabschätzung der akuten Pankreatitis, unter Beweis zu stellen.
    Notes: Abstract Procalcitonin is a protein which is found in elevated concentrations in the blood circulation during systemic bacterial, fungal or protozoal infection. In contrast to classical acute-phase proteins like C-reactive protein or interleukin-6, it is not elevated after operative trauma. In this paper we present current opinions on the assumed induction mechanisms of the protein by cytokines and endotoxin. Furthermore, the clinical value for early detection of systemic infections in abdominal and transplantation surgery is demonstrated by examples from the literature. Our investigation shows that eight patients with necrotizing pancreatitis had a PCT mean value of 6.9 ng/ml on the day of admission. Seven patients with edematous pancreatitis had only a PCT mean value of 0.69 ng/ml. Despite these differences in the mean values, a significant difference between the normal value and the mean value of the group with necrotizing pancreatitis or edematous pancreatitis was not observed due to the wide range of PCT levels in the group of patients with necrotizing pancreatitis. The fact that only a few of the patients had a superinfected necrosis with systemic evasion of bacterias or their toxins may be the reason for this wide range. We suggest that a discrimination between superinfected necrotizing or sterile pancreatitis and edematous pancreatitis by PCT could be possible but more extensive studies with microbiological examination of the necrotic material are required to recognize the subgroups and to establish the real diagnostic efficiency of PCT in clinical practice, especially in the prediction of the outcome of acute pancreatitis.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 382 (1997), S. 367-372 
    ISSN: 1435-2451
    Keywords: Procalcitonin ; Clinical application ; Sepsis ; Acute pancreatitis ; Prokalzitonin ; Klinische Applikation ; Sepsis ; Akute Pankreatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Prokalzitonin (PCT) ist ein Protein, welches bei systemischen Infektionen mit Bakterien, Pilzen und Protozoen in erhöhter Konzentration im Blut nachgewiesen werden kann. Bei operativen Traumen steigt PCT im Gegensatz zu den klassischen Akute-Phase-Proteinen, wie C-reaktivem Protein oder Interleukin-6, nicht oder nur marginal an. Somit ist es möglich, mit Hilfe eines Laborparameters systemische Infektionen postoperativ zu erkennen. In dieser Arbeit werden aus heutiger Sicht die vermuteten Induktionsmechanismen der PCT-Synthese durch Zytokine und bakterielle Endotoxine dargestellt. Außerdem werden klinische Anwendungen der PCT-Messung mit Beispielen aus der Abdominal- und Transplantationschirurgie vorgestellt. In eigenen Untersuchungen konnten wir am Aufnahmetag bei 8 Patienten mit nekrotisierender Pankreatitis einen PCT-Mittelwert von 6,9 ng/ml messen. Weitere 7 Patienten mit ödematöser Pankreatitis wiesen einen PCT-Mittelwert von nur 0,67 ng/ml auf. Trotz des deutlichen Unterschieds in den Mittelwerten konnte keine statistisch signifikante Differenz zwischen Normalwerten und nekrotisierender Pankreatitis einerseits oder Normwerten und ödematöser Pankreatitis andererseits festgestellt werden. Die Ursache hierfür lag in der großen Streubreite der PCT-Werte in der Gruppe mit nekrotisierender Pankreatitis (0,33–32,9 ng/ml). Diese große Variation der Werte ist möglicherweise dadurch bedingt, daß nur ein Teil der Patienten schon frühzeitig eine bakterielle Superinfektion der Nekrose mit konsekutiver PCT-Erhöhung aufwies. Wir vermuten, daß eine Unterscheidung zwischen superinfizierter nekrotisierender Pankreatitis einerseits und nekrotisierender steriler Pankreatitis bzw. ödematöser Pankreatitis andererseits mittels PCT-Messungen möglich ist, jedoch sind größere Studien mit einer mikrobiologischen Untersuchung des nekrotischen Materials und Blutkulturen notwendig, um den endgültigen Stellenwert der PCT-Bestimmung im klinischen Alltag, besonders in der Prognoseabschätzung der akuten Pankreatitis, unter Beweis zu stellen.
    Notes: Abstract Procalcitonin is a protein which is found in elevated concentrations in the blood circulation during systemic bacterial, fungal or protozoal infection. In contrast to classical acute-phase proteins like C-reactive protein or interleukin-6, it is not elevated after operative trauma. In this paper we present current opinions on the assumed induction mechanisms of the protein by cytokines and endotoxin. Furthermore, the clinical value for early detection of systemic infections in abdominal and transplantation surgery is demonstrated by examples from the literature. Our investigation shows that eight patients with necrotizing pancreatitis had a PCT mean value of 6.9 ng/ml on the day of admission. Seven patients with edematous pancreatitis had only a PCT mean value of 0.69 ng/ml. Despite these differences in the mean values, a significant difference between the normal value and the mean value of the group with necrotizing pancreatitis or edematous pancreatitis was not observed due to the wide range of PCT levels in the group of patients with necrotizing pancreatitis. The fact that only a few of the patients had a superinfected necrosis with systemic evasion of bacterias or their toxins may be the reason for this wide range. We suggest that a discrimination between superinfected necrotizing or sterile pancreatitis and edematous pancreatitis by PCT could be possible but more extensive studies with microbiological examination of the necrotic material are required to recognize the subgroups and to establish the real diagnostic efficiency of PCT in clinical practice, especially in the prediction of the outcome of acute pancreatitis.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 326 (1987), S. 447-454 
    ISSN: 1434-601X
    Keywords: 21.60.CS ; 25.30.Dh ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The line shape and the excitation strength of the very weak first excited J π =1/2+ state at Ex=1.684 MeV in Zeitschrift für Physik Zeitschrift für Physik9Be has been investigated with high-resolution inelastic electron scattering at E0=45 and 49 MeV and scattering angles θ=105°, 117°, 129° and 165°, and with high-resolution inelastic proton scattering at E0=13MeV and θ=15° and 18°. Due to lying just above the neutron threshold the level has a strongly asymmetric line shape which in both experiments can be described consistently with a Breit-Wigner expression modified on the low energy side by the threshold behaviour of the cross section. The resonance energy is ER=1.684 ± 0.007 MeV and the width T=217± 10 keV in thec.m. system. A single particle potential model calculation reproduces the line shape and the resonance parameters fairly well. In addition, the inelastic electron scattering form factor has been measured. In the range of momentum transfersq =0.24-0.46 fm−1 it is dominated by a 0p3/2→ 1s1/2 particle-hole transition. The transition is mainly longitudinal and of isoscalar nature with a strength of B (E1)↑ =0.027 + 0.002 e2 fm2, but a small M2 contribution ofB(M2)↑=8.8 ±1.5 μ N 2 fm2 has also been detected.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 65 (1993), S. 1132-1133 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 573-582 
    ISSN: 0142-2421
    Keywords: near-field microscopy ; laser diodes ; photocurrent spectroscopy ; optics ; semi-conductor lasers ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Near-field photocurrent spectra of high-power laser diode arrays with different wave-guide characteristics are reported. Subwavelength spatial resolution is achieved by using a near-field fibre probe as the excitation source. The effect of the laser diode waveguide structure and of surface recombination processes on the near-field photocurrent image formation is discussed and analysed in terms of a beam propagation model. Experiments on laser diodes before and after accelerated ageing demonstrate the potential of the technique for analysing microscopic defect formation processes in optoelectronic devices.© 1997 John Wiley & Sons, Ltd.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 583-592 
    ISSN: 0142-2421
    Keywords: near-field microscopy ; semiconductors ; quantum wires ; photoluminescence spectroscopy ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The nanoscopic room temperature optical properties of single quantum wires are characterized by a combination of near-field photoluminescence and photoluminescence excitation spectroscopy. Single GaAs quantum wires with a 50 nm lateral dimension are grown at the edge of 15 nm high mesa stripes on patterned GaAs(311) surfaces. Wire formation relies on the preferential migration of Ga atoms from a GaAs layer on the mesa top and bottom towards the sidewall. Spatially resolved photoluminescence spectra separate quantum wire and quantum well emission and image the diffusion of photoexcited carriers into the wires. Photoluminescence excitation spectra give insight into the absorption spectrum of the wires and the spectral position of different interband transitions in the one-dimensional carrier system. They allow the change in local thickness of the GaAs quantum well due to the migration process to be monitored directly with subwavelength spatial resolution. Both the trapping of carriers into the wire and the detrapping of carriers generated within the wire into the surrounding quantum well states are separately resolved.© 1997 John Wiley & Sons, Ltd.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 41 (1990), S. 522-527 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Poly(bis-methylthio-acetylene) and poly(bis-ethylthio-acetylene) were investigated by 13C-NMR with respect to the structure of the main chain and the mobility of the side chains. The main chain consists of sp2-hybridized carbon atoms. The 1,2-bisalkylthylen units build up a nonplanar polymer backbone, which does not show any discrete configurations. In poly(bis-methylthio-acetylene) the MeS units undergo a rotational diffusion motion with a resorentation rate of about 70 kHz. The electron spin dynamics have on importance within the main chain.
    Notes: Poly(bis-methylthio-acetylen) und Poly(bis-ethylthio-acetylen) wurden hinsichtlich der Struktur der Hauptkette und der Beweglichkeit der Seitenketten mittels 13C-NMR-Spektroskopie untersucht. Die Hauptkette bestecht aus sp2- hydridisierten C-Atomen. Die 1,2-Bisalkythioethylen-Einheiten bilden ein nicht-Planares Polymerrückgrat, für das keine distreten Konfigurationen nachzuweisen sind. In Poly(bis-methylthio-acetylen) führen die MeS-Einheiten eine Rotationsdiffusionsbewegung von etwa 70 kHz aus. Innerhalb der Hauptkette hat die Elektronenspindynamik keine Bedeutung.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 337-338 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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