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  • 1
    Electronic Resource
    Electronic Resource
    Cystic islet cell tumors: Radiologic findings in three cases (1994)
    Springer
    Abdominal imaging 19 (1994), S. 225-228 
    Details
    ISSN: 1432-0509
    Keywords: Pancreas, neoplasms ; Islet cell tumors, diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report three cases of cystic islet cell tumors, two caused by gastrinomas and the other by an islet cell carcinoma. All three patients underwent computed tomography (CT) and angiography and two also had magnetic resonance (MR) imaging. Several common radiographic findings were present as follows: thickening of the cyst wall and irregularity of the inner surface on postcontrast CT and MR images, neovascularity and a densely staining hypervascular rim on angiography, and moderately increased signal intensity of the cyst content on T1-weighted MR images, which indicated fluid containing blood and/or necrotic tissue. These findings are helpful in defining the nature of these lesions and strongly suggest that cystic islet cell tumor should be included in the differential diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203512
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Selective loss of nigral neurons in Pick's disease: a morphometric study (1990)
    Springer
    Acta neuropathologica 81 (1990), S. 155-161 
    Details
    ISSN: 1432-0533
    Keywords: Pick's disease ; Substantia nigra ; Pigmented neurons ; Morphometry ; Parkinsonism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Loss of neurons from the substantia nigra (SN), which is often encountered in Pick's disease, was quantitatively analyzed in 13 cases of Pick's disease and 19 age-matched controls. On sections from the upper and lower portions of the SN, the pigmeted zone (zona compacta) and the non-pigmented zone (zona reticulata) were delineated, and these zones were partitioned into quarters: medial, mid-medial, mid-lateral and lateral. Neuronal loss was fairly severe and more evident in the upper section of the SN (−40%), especially in the midmedial and lateral quarters. In the lower section (neuronal loss:−28%), the medial quarter was most severely affected. Non-pigmented neurons were preserved. Fibrillary gliosis was denser in the zona reticulata, where neuronal loss was minimal. These findings revealed a selective vulnerability of nigral neurons according to their topography and pigmentation and suggests the primary involvement of some neuronal groups (especially the pigmented neurons) of the SN in Pick's disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334504
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the structure factors of diamond (1990)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 514-517 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The absolute values of the structure factors of diamond are determined for nine low-order reflections by measuring the X-ray Pendellösung beats on the wavelength scale. Parallel-sided wafers of synthetic diamond single crystals are used for specimens. The deformation charge density and the Debye-Waller B factor are evaluated from the structure factors. The charge density of pile-up electrons is estimated to be 0.44(17) eÅ-3 at the midpoint between the nearest-neighbour atoms. The density is slightly smaller than that determined by the powder diffraction method. The obtained B factor, 0.142 (9) Å2, is in good agreement with that evaluated to date from neutron diffraction measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767390002197
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Vitamin E deficiency in acquired fat malabsorption (1990)
    Springer
    Journal of neurology 237 (1990), S. 103-106 
    Details
    ISSN: 1432-1459
    Keywords: Vitamin E deficiency ; Fat malabsorption ; Diabetes mellitus ; Chronic pancreatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirteen patients with adult-onset vitamin E deficiency due to fat malabsorption were investigated clinically and electrophysiologically. These patients had slightly or moderately decreased serum vitamin E (1.7–4.8 μg/ml, normal 〈6.0) or vitamin E/cholesterol ratio (0.21–0.31 mg/g, normal 〈0.35). Only one patient had typical neurological manifestations of vitamin E deficiency, which improved with supplementary vitamin E. The pathological findings in this patient were also compatible with vitamin E deficiency. This patient had poorly controlled diabetes mellitus due to advanced chronic pancreatitis. Reviewing previously reported cases of vitamin E deficiency with diabetes mellitus in chronic pancreatitis, the duration of deficiency until the onset of symptoms was shorter than in those cases without complications. Although adult patients with early, slight deficiency of vitamin E are generally asymptomatic, patients with diabetes mellitus tend to have early neurological symptoms. The vitamin E tolerance test should be used, because even in some patients with vitamin E deficiency due to malabsorption, the deficiency can be overcome by large oral doses of vitamin E.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314671
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Contrast-enhanced magnetic resonance imaging of sub- and epidural empyemas (1992)
    Springer
    Neuroradiology 34 (1992), S. 494-496 
    Details
    ISSN: 1432-1920
    Keywords: Subdural empyema-Epidural empyema ; Gadopentetate dimeglumine ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Contrast-enhanced magnetic resonance images (MRI) of three patients with subdural (SDE) and two with epidural empyemas (EDE) were reviewed. In each case, the capsule of the lesion demonstrated enhancement, and distinction between capsule and contents was obvious on contrast-enhanced images. In SDE, contrast-enhanced images clearly depicted thickening of the neighbouring dura mater and a co-existent brain abscess. In EDE, part of the displaced dura mater did not enhance, which facilitated differentiation from SDE. Contrast-enhanced MRI was thus of value in diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00598958
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    MRI appearances of calcified regions within intracranial tumours (1993)
    Springer
    Neuroradiology 35 (1993), S. 341-344 
    Details
    ISSN: 1432-1920
    Keywords: Brain tumour ; Calcification ; Magnetic resonance imaging ; Gadopentetate dimeglumine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The MRI appearances of calcification within intracranial tumours was assessed by reviewing MR images of 11 calcified tumours documented by CT. The signal intensity of the calcified regions was varied and nonspecific on both T1-and T2-weighted images. They were seen as signal void exclusively on T2-weighted images in only 2 patients. Gadolinium enhancement of the calcified portion occurred in 7 of 10 patients. These findings reflect the presence of tumour parenchyma within the calcified region, as proved in 5 lesions examined histologically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588364
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  • 7
    Electronic Resource
    Electronic Resource
    Moyamoya disease: diagnosis with three-dimensional CT angiography (1994)
    Springer
    Neuroradiology 36 (1994), S. 432-434 
    Details
    ISSN: 1432-1920
    Keywords: Moyamoya disease ; Computed tomography ; Three-dimensional imaging ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Our purpose was to assess the value of threedimensional (3D) CT angiography in the diagnosis of moyamoya disease. We studied seven patients with moyamoya disease proved by conventional angiography. Three-dimensional (3D) CT angiography was performed using rapid sequence or helical (spiral) scanning in conjunction with a bolus injection of intravenous contrast medium. All seven patients could be diagnosed as having moyamoya disease on the basis of the following 3D CT angiographic findings: poor visualisation of the main trunks and/or major branches of anterior and middle cerebral arteries (7 patients); dilated leptomeningeal anastomotic channels from the posterior cerebral arteries (4); and demonstration of “moyamoya vessels” in the basal ganglia (2). Although conventional angiography remains the principal imaging technique for demonstrating anatomical changes in detail, less invasive 3D CT angiography provides a solid means of diagnosing moyamoya disease when it is suspected on CT, MRI, or clinical grounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593677
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Improvement of chemical kinetic data at high temperatures by piston actuated shock tube, excimer laser photolysis, and atomic resonance absorption spectrometry (1994)
    Springer
    Shock waves 3 (1994), S. 287-292 
    Details
    ISSN: 1432-2153
    Keywords: ARAS ; Elementary reaction ; Excimer laser photolysis ; Piston actuated shock tube ; Spectroscopy ; Vibrational relaxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics , Technology
    Notes: Abstract Qualitative improvement of chemical kinetic data at high temperatures has been achieved, to a great extent, by use of a combination of the piston actuated shock tube, the excimer laser photolysis, and the atomic resonance absorption spectrometry. Some of the important studies on elementary reactions performed recently in the University of Tokyo are demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415826
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  • 9
    Electronic Resource
    Electronic Resource
    Particle drift induced by a bubble in a liquid-solid fluidized bed with low-density particles (1992)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 38 (1992), S. 1847-1851 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690381117
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    Paper (German National Licenses)
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