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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 22 (1996), S. 909-915 
    ISSN: 1432-1238
    Keywords: Acute pancreatitis ; Necrotizing pancreatitis ; Octreotide ; Treatment ; Systemic complications ; SIRS ; ARDS ; Circulatory shock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To determine the efficiency of intravenous infusion of octreotide in the treatment of patients with severe pancreatitis and pulmonary failure. Design Prospective, case-control study. Setting Intensive care unit of a university hospital. Patients Treatment group: 39 patients with necrotizing pancreatitis were selected for the study. In all, pulmonary failure developed under conservative treatment and surgical intervention had been necessary because of local (abscess, necrosis) or systemic (systemic inflammatory response syndrome) complications. The outcome was prospectively followed up until death or discharge from the hospital. Control group: 54 case-control matched patients with acute necrotizing pancreatitis and pulmonary failure, who had not been treated with octreotide. Intervention Each patient in the treatment group received 100 μg intravenous octreotide three times daily for 10 days, in addition to the standard intensive care therapy. Results The groups (octreotide group, control group) were highly comparable with regard to age (mean age: 54, 51 years), sex, severity of illness (Acute Physiology and Chronic Health Evaluation II score: 27, 27), etiology of pancreatitis, and pretreatment at the time of admission to the intensive care unit. There was no difference in the development of renal, hepatic, gastrointestinal, hemostatic, neurologic, or local complications. But the frequency of the adult respiratory distress syndrome (18 vs 40%;p〈0.05) and circulatory shock (51 vs 87%;p〈0.05) was significantly lower in the treatment group. Furthermore, mortality was 26% (10 of 39 patients) in the octreotide group and 61% (33 of 54 patients) in the control group (p〈0.01). Conclusion The results of our case-control study showed a beneficial effect of octreotide in patients with severe necrotizing pancreatitis and pulmonary failure. Based on these data, a prospective, double-blind, placebo-controlled study should be performed to evaluate these results.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 22 (1996), S. 909-915 
    ISSN: 1432-1238
    Keywords: Key words Acute pancreatitis ; Necrotizing pancreatitis ; Octreotide ; Treatment ; Systemic complications ; SIRS ; ARDS ; Circulatory shock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract   Objective: To determine the efficiency of intravenous infusion of octreotide in the treatment of patients with severe pancreatitis and pulmonary failure. Design: Prospective, case–control study. Setting: Intensive care unit of a university hospital. Patients: Treatment group: 39 patients with necrotizing pancreatitis were selected for the study. In all, pulmonary failure developed under conservative treatment and surgical intervention had been necessary because of local (abscess, necrosis) or systemic (systemic inflammatory response syndrome) complications. The outcome was prospectively followed up until death or discharge from the hospital. Control group: 54 case–control matched patients with acute necrotizing pancreatitis and pulmonary failure, who had not been treated with octreotide. Intervention: Each patient in the treatment group received 100 μg intravenous octreotide three times daily for 10 days, in addition to the standard intensive care therapy. Results: The groups (octreotide group, control group) were highly comparable with regard to age (mean age: 54, 51 years), sex, severity of illness (Acute Physiology and Chronic Health Evaluation II score: 27, 27), etiology of pancreatitis, and pretreatment at the time of admission to the intensive care unit. There was no difference in the development of renal, hepatic, gastrointestinal, hemostatic, neurologic, or local complications. But the frequency of the adult respiratory distress syndrome (18 vs 40%; p〈0.05) and circulatory shock (51 vs 87%; p〈0.05) was significantly lower in the treatment group. Furthermore, mortality was 26% (10 of 39 patients) in the octreotide group and 61% (33 of 54 patients) in the control group (p〈0.01). Conclusion: The results of our case–control study showed a beneficial effect of octreotide in patients with severe necrotizing pancreatitis and pulmonary failure. Based on these data, a prospective, double-blind, placebo-controlled study should be performed to evaluate these results.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 61 (1995), S. 163-170 
    ISSN: 1432-0630
    Keywords: PACS: 78.40; 78.30; 73.60; 78.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  Optical properties in the spectral range from 0.06 to 5.5 eV of fullerite films on different substrates, C60 powder, and dissolved fullerene material are investigated by spectroscopic ellipsometry and optical transmission and reflection measurements. Depolarization effects are taken into account during determination of the dielectric function of fullerite films by ellipsometry. The optical gap for C60 films is found to be 1.63 eV. Three optical absorption bands are observed at 2.69, 3.53, and 4.49 eV. The dielectric function in the infrared shows the four characteristic infrared vibrational modes. The interference pattern seen in UV/VIS reflection measurements are used for high-precision thickness determination of the films. The Clausius-Mossotti formula is successfully applied to reproduce the experimental optical data measured in C60/dichlormethane solutions. Deviations between theory and experiments provide interesting information about the intermolecular interaction of the C60 molecules. A tentative interpretation of the measured absorption bands is presented.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 61 (1995), S. 163-170 
    ISSN: 1432-0630
    Keywords: 78.40 ; 78.30 ; 73.60 ; 78.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Optical properties in the spectral range from 0.06 to 5.5 eV of fullerite films on different substrates, C60 powder, and dissolved fullerene material are investigated by spectroscopic ellipsometry and optical transmission and reflection measurements. Depolarization effects are taken into account during determination of the dielectric function of fullerite films by ellipsometry. The optical gap for C60 films is found to be 1.63 eV. Three optical absorption bands are observed at 2.69, 3.53, and 4.49 eV. The dielectric function in the infrared shows the four characteristic infrared vibrational modes. The interference pattern seen in UV/VIS reflection measurements are used for high-precision thickness determination of the films. The Clausius-Mossotti formula is successfully applied to reproduce the experimental optical data measured in C60/dichlormethane solutions. Deviations between theory and experiments provide interesting information about the intermolecular interaction of the C60 molecules. A tentative interpretation of the measured absorption bands is presented.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 19 (1974), S. 377-393 
    ISSN: 1432-1106
    Keywords: Frog vestibular neurons ; Dendritic spikes ; Vestibular efferents ; Electrotonic coupling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Field and intracellular potentials were recorded in the vestibular nuclei of the frog following stimulation of the anterior branch of the ipsilateral vestibular nerve and the spinal cord. The field potential induced by stimulation of the vestibular nerve consisted of an early positive-negative wave followed by a slow negativity and that recorded during spinal cord stimulation was composed of an antidromic potential followed by a slow negative wave. These potentials were most prominent in the ventral region of the stato-acoustic complex. Mono- and polysynaptic EPSPs were recorded from vestibular neurons following vestibular nerve stimulation. Short latency depolarizations of small amplitude preceded the monosynaptic EPSPs in some neurons. Spike-like partial responses were commonly superimposed on the EPSPs. These all-or-none depolarizations probably originated in the dendrites. In a group of vestibular neurons stimulation of the vestibular nerve evoked full action potentials with latencies ranging from 0.2 to 1.1 msec. They are presumably caused by antidromic activation of neurons which send their axons to the labyrinth. The presence of efferent neurons in the vestibular nuclei was confirmed by their successful staining with Procion Yellow following axonal electrophoresis. After stimulation of the spinal cord, antidromic spike potentials and EPSPs were recorded in vestibular neurons. In addition, short-latency depolarizing potentials (EDPs) were evoked by spinal stimulation, with latencies similar to those of antidromic potentials. The EDPs are suggested to be induced by electrotonic transmission from the neighboring cell and likely to be active spike potentials produced at some distance away from the soma.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1084
    Keywords: Key words: MR angiography ; Contrast enhancement ; Three-dimensional MR ; Vascular studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. With approximately 150 reported cases, fistulas between the abdominal aorta and inferior vena cava are rare. Preoperative clinical diagnosis of aortocaval fistula is difficult because the classical triad of abdominal pain, pulsatile abdominal mass, and abdominal machinery-like bruit may be absent in up to 50 % of patients. We report a case of aortocaval fistula complicating abdominal aortic aneurysm which was diagnosed preoperatively using breath-hold gadolinium-enhanced three-dimensional MR angiography.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1106
    Keywords: Key words Dystonia ; Neurotransmitter enzymes ; Golden hamster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  In the dt sz mutant hamster with idiopathic generalized dystonia, functional abnormalities of several neurotransmitters have been suggested to play a role in the development of symptoms. In the present study, we have used histochemistry with 35S-ATP labeled oligonucleotides to determine whether these abnormalities are associated with modulation in the expression of neurotransmitter genes in motor regions. We examined the expression of genes encoding cholecystokinin (CCK), somatostatin (SRIF), thyrotropin-releasing hormone (TRH), glutamic acid decarboxylase (GAD), tyrosine hydroxylase (TH) and growth-associated protein 43 (GAP43) in the cortex and basal ganglia of dystonic hamsters and of non-dystonic control hamsters of a related inbred line and of a non-related outbred line. The distribution of these mRNAs in normal hamster brain was similar to that in normal rat brain. In all cortical regions studied (frontal, parietal and piriformis), the expression of CCK was similar in dystonic and inbred controls but was significantly greater than in outbred controls. In the anterior thalamus, CCK expression was lower in dystonic hamsters than in both control groups. SRIF expression was significantly decreased in the cortex and striatum of dystonic animals than in inbred and outbred control hamsters. GAD expression was lower in the striatum and substantia nigra, pars reticulata of dystonic than in outbred hamsters, but similar values were found in all groups in the other regions studied. TH was lower in the substantia nigra of dystonic than in inbred controls. No changes were found in GAP43 expression. This study demonstrates that changes in modulation of the expression of some peptides and neurotransmitter enzymes can be found in the dystonic hamster, which is in contrast to other animal models such as the dystonic rat, where no such changes have been found. The present data are consistent with previous findings in dt sz hamsters that suggest a dysfunction within the basal ganglia-thalamocortical circuits.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 20 (1974), S. 223-238 
    ISSN: 1432-1106
    Keywords: Trochlear nucleus ; Interstitial nucleus of Cajal ; Darkschewitsch nucleus ; Descending oculomotor control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Stimulation of both an ipsi and contralateral medial midbrain area in pentobarbital anesthetized cats evoked an EPSP-IPSP sequence in trochlear motoneurons (TMn). The latencies of both the EPSP and IPSP were in the monosynaptic range. Experiments on chronic medial longitudinal fasciculus sectioned cats showed that the TMn effects were not produced by collaterals of ascending vestibular axons antidromically excited from the medial midbrain. Stimulation of the same area had no effect in abducens motoneurons, but produced EPSPs and spikes in reticular neurons just ventral to the VI nucleus. The effective area for producing TMn PSPs, as delimited by multiple stimulation electrode arrays, extended only over the interstitial nucleus of Cajal-nucleus of Darkschewitsch area (IN). The effective bilateral IN areas appeared homogeneous in their ability to produce both the EPSP and IPSP components in TMns, even at minimum stimulus strength. It was concluded that the IN area is the origin of monosynaptic excitatory and inhibitory pathways to TN, and it was discussed how the IN has the synaptology required of an integration center for reciprocal control of conjugate vertical and rotational eye movements.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 8216-8220 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Isotherms and x-ray diffraction studies of eicosanoic acid Langmuir monolayers show a phase in which the molecular tilt is intermediate between nearest-neighbor (NN) and next-nearest-neighbor (NNN) directions. The transition from this "I" phase to an NN-tilted structure is first order, with a ∼60° change in the tilt direction, while the transition to an NNN-tilted structure is apparently continuous. These results can be explained using a Landau-type theory for uniaxially distorted lattices, which is a modification of an existing theory for hexagonal lattices [J. V. Selinger and D. R. Nelson, Phys. Rev. Lett. 61, 416 (1988)]. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 2176-2178 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report a time-resolved near-field luminescence study of excitonic real-space transfer into single GaAs quantum wires. Excitons generated by local optical excitation in a 250 nm spot undergo diffusive transport over a length of several microns and are subsequently trapped into the quantum wire by optical phonon emission. Local energy barriers in the vicinity of the quantum wire, originating from the epitaxial growth mechanism of the nanostructure, directly influence the real-space transfer dynamics and trapping efficiency. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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