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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 185-188 (Mar. 1995), p. 991-1000 
    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
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Sporadic juvenile ALS ; Neuronal intracytoplasmic inclusion ; RNA-protein compounds ; Straight tubule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In an autopsy case of the sporadic juvenile ALS (a 17-year-old girl) intracytoplasmic inclusions are found in the upper and lower motor neurons and in nerve cells of the dentate nucleus, pontine nucleus, brain stem reticular formation, substantia nigra, thalamus, globus pallidus and others. Histochemically they contain RNA-Protein compounds. Electron microscopically, they consist of randomly interwoven tubules with granular endoplasmic reticulums and free ribosomes in the margin. Each tubule measures 90–150 Å in diameter and shows no distinct periodic constiction. Amorphous substances as well as ribosome granules are scattered and associated with those tubules. The inclusion-bearing cells are usually swollen and chromatolytic and have a large hydropic nucleus, suggesting a close relation between the development of the inclusion and chromatolysis. Clinically, a rapid progress of the symptoms (total duration: about 12 months) and conspicuous disturbances of the autonomic nerve, such as sinus tachycardia and bladder sphincter dysfunction, should be noticed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 61 (1983), S. 43-51 
    ISSN: 1432-0533
    Keywords: Hereditary motor neuropathy ; Wohlfart ; Kugelberg-Welander syndrome ; Chronic spinal muscular atrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Forty cases of chronic hereditary motor neuropathy (CHMN) were divided into five categories according to the distribution of muscle atrophy; they were proximal, facioscapulohumeral, bulbospinal, distal and scapuloperoneal forms. Their clinical features and laboratory data were analysed, and muscle biopsies from 32 of them were studied by histological, histochemical and electron microscopical methods. An attempt at quantitative assessment of the histological changes was also made. All muscle biopsies showed a mixture of neurogenic and ‘myopathic’ changes in varying proportions. They showed more ‘myopathic’ changes than Werdnig-Hoffmann's disease, amyotrophic lateral sclerosis and other neurogenic atrophies except Charcot-Marie-Tooth disease. There was marked variation in the average number of atrophied muscle fibers contained in grouped atrophy. Frequently, deranged internal structure of the muscle fibres was revealed both by histochemical and electron microscopical methods. Based on the evidence of heterogeneity of CHMN in respect of genetics, clinical features and histological changes, it was speculated that CHMN represents a group of diseases which involves primarily different parts of the motor units.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 57 (1996), S. 1 -7 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 57 (1996), S. 853 -858 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 15-17 (Feb. 2006), p. 393-397 
    ISSN: 1662-8985
    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: Authors tried to butt-weld a mild steel plate to a magnesium alloy plate by the solidstate welding using a rotating pin. This study investigated the effects of a pin rotating speed, theposition for the pin axis to be plunged (pin offset) on the strength and the microstructure of the joint.The main results obtained are as follows. Butt-welding of a steel plate to a magnesium alloy platewas easily and successfully achieved. The maximum tensile strength of a joint reached about 70%of the magnesium base metal tensile strength and the fracture path was along the joint interface.When a pin rotating speed was slow, some defects appeared in the magnesium matrix due to theinsufficient plasticization of the magnesium. The joint strength increased with the pin rotating speed.This seems to be because the plasticization of the magnesium was increased and the pressure forpushing the plasticized magnesium onto an activated faying surface of the steel increased. However,the excessive increase of the pin rotating speed caused the ignition of the magnesium, resulting inthe decrease of a joint strength. At the pin offset of 0.1mm toward steel, steel fragments scattered inthe magnesium matrix in the form of a small piece that had no influence to the joint strength. Bycontrast, larger offsets over 0.2mm produced the steel fragment continuous and parallel to the weldinterface in the magnesium matrix, and the joint strength decreased
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0942-0940
    Keywords: Aneurysm ; cardiac catheterization ; electrocardiogram ; subarachnoid haemorrhage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twenty-three patients with aneurysmal subarachnoid haemorrhage (SAH), who showed an ST segment elevation in their electrocardiograms (ECG), were examined. There were 12 males and 11 females, with a mean age of 61 years. The clinical condition on admission was Hunt and Kosnik grade II in four, III in seven, IV in one, and V in 11 patients. Computerized tomography (CT) also revealed many cases of diffuse, thick SAH or intracerebral or intraventricular haematoma. Laboratory examinations including serum electrolyte, pH, and PaO2 revealed no abnormalities that might have influenced the ECG. Elevation in the levels of myocardial enzymes in serum was observed in two of the nine patients examined, although the elevation was only slight in one of them. Echocardiography, which was performed on several occasions on all patients, and cardiac catheterization, which was performed on eight patients, revealed a reduction in the motion of the left ventricular apex that was synchronous with ST segment elevation. This is the first report about these phenomena. No abnormalities were observed in the coronary artery. The elevated ST segment was normalized within one week in all patients, accompanied by normalization of the apical wall motion recorded on echocardiograms. In four patients, however, T wave inversion accompanied the improvement of the ST segment and was normalized within three months after the onset. These results suggest that ST segment elevation in the acute stage of SAH reflects transient cardiac dysfunction rather than myocardial injury. In some patients, however, the elevated serum levels of myocardial enzymes or T wave inversion suggested the presence of myocardial injury. Close follow-up seems to be necessary in such cases
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 210-213 (May 1996), p. 45-54 
    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
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3856-3862 
    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: This paper described an experimental study on the friction stir welding of dissimilarmetal between commercially pure titanium (CPTi) and magnesium alloy AZ31B (Mg). Butt-weldsproduced at various tool rotation speeds were evaluated by the observation of the weld surfaceappearance, X-ray radiographic test, tensile test, SEM and EDX analysis. The main results obtainedare as follows. Butt-joint welding of the CPTi plate to the Mg plate was easily and successfullyachieved. The ignition of Mg occurred during welding at the tool rotation speeds over 1200rpm.The fragments of CPTi existed in a continuous form in Mg matrix. The tool rotation speed of1200rpm attained the maximum tensile strength of a joint, which was about 75% of that of Mg basemetal. Fracture occurred at the weld interface in most joint. EDX analysis revealed that Al in theMg diffused into CPTi through the weld interface and MgO existed at the interface. It seems thatthe decrease in Al concentration in the Mg and MgO formation around the weld interface caused thelow tensile strength of the joints
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 553 (1979), S. 396-403 
    ISSN: 0005-2736
    Keywords: Chemotaxis ; Ergosterol ; Lipid composition ; Sensitization ; Zeta potential
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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