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  • 2005-2009  (1)
  • 1980-1984  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 16 (1983), S. 653-657 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A computer program for the deconvolution of X-ray diffraction profiles has been written in Fortran IV. The deconvolution procedure is based on the minimization of the difference between the observed data function and a calculated function, where the latter is the convolution of the instrumental function and the true data function approximated with an analytical expression. The composite of two asymmetric Pearson type VII functions was assumed to represent the true data function, and the simplex method was used for the minimization. The stability of convergence and the influences of the truncation effect and the step width of intensity data on the deconvoluted profile were examined. The computer program can deconvolute the X-ray diffraction profile in moderate computation time without generating spurious oscillations due to the truncation effect.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Parkinson disease ; Electron probe microanalysis ; Sulfur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two possible interpretations of the origin of Lewy bodies and adrenal bodies found in Parkinson's disease are now under discussion: a disorder of (1) catecholamine metabolism or (2) sphingomyelin lipidosis. From the electron probe microanalysis of Lewy bodies and adrenal bodies, we find that the Lewy body contains sulfur, calcium, and phosphorus, and the adrenal body also contains these three elements. Furthermore, a positive correlation was obtained between the X-ray intensity of the sulfur and the diameter of adrenal body. For Lewy bodies, this correlation was not obtained. The results suggest that a common mechanism may exist for the production of Lewy and adrenal bodies, although they differ somewhat in their accumulation of sulfur. It is considered that both structures may originate, in part, from degenerated protein containing sulfur.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 494 (Sept. 2005), p. 381-386 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Two-dimensional numerical model is adopted to analyze the heat transfer process during solidification of the sample melted in an Arc-image furnace. Numerical solution of this complex problem enabled us to calculate the temperature distribution in both sample and substrate, including the phase change phenomena. Also, the effects of process parameters on the solidification of the sample melted on substrate that is cooled by water can be investigated numerically. The parameters include sample size, contact area size between the sample and the substrate, and degree of undercooling associated with rapid phase change and moving interface. The results obtained reveal that these parameters have strong effect on temperature distribution during solidification
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 229 (1983), S. 17-32 
    ISSN: 1432-1459
    Keywords: Diffuse Lewy body disease ; Parkinsonism ; Lewy bodies ; Senile changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 55 Fälle mit histopathologischer Diagnose „Paralysis agitans (PA)” wurden neuropathologisch untersucht; nach Häufigkeit und Verteilung der Lewy-Körperchen sowie seniler Veränderungen wurde 3 Gruppen unterschieden. Gruppe A: 4 Fälle von hochgradiger, progressiver Demenz mit Muskelrigor zeigen neben ausgeprägten senilen Veränderungen zahlreich Lewy-Körperchen in corticalen Nervenzellen. Die Verteilung der Lewy-Körperchen in Zwischenhirn und Hirnstamm entsprach der klassischen PA. Diese Fälle bezeichnen wir als „diffuse Lewy-Körperchen-Krankheit“. Gruppe B: 15 Fälle mit Parkinson-Syndrom und leichter bis mäßiger Demenz (in 40% der Fälle) zeigten nur einzelne corticale Lewy-Körperchen bei zahlreicheren Lewy-Körperchen in Zwischenhirn und Hirnstamm und geringeren senilen Veränderungen als bei Gruppe A. Die Fälle mit Demenz bei Gruppe B könnten als Übergangsfälle zur Gruppe A angesehen werden. Gruppe C: 36 Fälle mit Parkinson-Syndrom ohne Demenz zeigten das Vorkommen von Lewy-Körperchen mit etwas geringerer Häufigkeit als bei Gruppe A und B im Zwischenhirn und Hirnstamm, jedoch nicht in der Hirnrinde. Im klinisch-pathologischen Aspekt entsprachen die Gruppen B und C der klassischen PA.
    Notes: Summary A group of 55 autopsy cases of paralysis agitans were studied with special attention to distribution of Lewy bodies and cortical changes. According to the frequency of Lewy bodies and senile changes (senile plaques and Alzheimer neurofibrillary tangles), three groups could be distinguished. Group A (4 cases; 3 males, 1 female; aged 65–76 years) with progressive dementia and muscle rigidity showed numerous Lewy bodies, not only in the diencephalon and brain-stem but also in the cerebral cortex, and a high incidence of senile changes. The pattern of distribution of Lewy bodies in the brain-stem was identical to that of Parkinson's disease. Cerebral Lewy bodies were observed predominantly in small or medium-sized pyramidal neurons in the fifth and sixth layers of the temporal, frontal, insular and cingulate cortex. These cases are termed “diffuse Lewy body disease”. Group B (15 cases; 10 males, 5 females; aged 62–79 years) with classical parkinsonism showed many Lewy bodies in the diencephalon and brain-stem, but cerebral Lewy bodies and senile changes were less frequent than in group A. In group B, the frequency of cerebral Lewy bodies and senile changes was higher in patients with dementia (7 cases, 40%) than in patients without dementia. The demented patients in this group may form a transition between groups B and A. Group C (36 cases; 17 males, 19 females; aged 52–85 years) without dementia, showed fewer Lewy bodies in the diencephalon and brain-stem than in groups A and B; cerebral Lewy bodies were not found. The frequency of senile changes corresponded to age. Clinicopathologically, the cases in groups B and C correspond to classical paralysis agitans.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 26 (1984), S. 241-243 
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The maximum mass of cold Bose star that can sustain its own gravity is determined to be ≈0.6/Gm, wherem is the mass of boson. This is different from the Oppenheimer-Volkoff mass of ≈0.4/G 3/2 m N 2 for the neutron star and may facilitate formation of smaller black holes made of cold invisible axions in the axion dominated universe.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 1 (1982), S. 461-462 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 3 (1984), S. 57-59 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 3 (1984), S. 1097-1098 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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