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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of the angiographic findings in cases of childhood moyamoya disease (1988)
    Springer
    Neuroradiology 30 (1988), S. 111-119 
    Details
    ISSN: 1432-1920
    Keywords: Childhood moyamoya disease ; Cerebral angiography ; Stenosis ; Collateral pathways ; Aneurysm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cerebral angiograms of 34 patients with childhood moyamoya disease have been analysed, this analysis having revealed the following findings. The blood flow to abnormal net-like vessels (ANV) in the base of the brain is mainly supplied from the internal carotid artery (ICA) in the early stage of this disease. In a later stage, however, the blood supply is mainly from the posterior cerebral artery (PCA). Though, no remarkable change was found in the volumes of ANV from the early to later stages of the disease, the leptomeningeal collaterals, the most prominent anastomoses in moyamoya disease, had a tendency to decrease during the later stage with the development of PCA stenosis. Eighteen occlusive PCA lesions were found in the proximal portion of the PCA in eight cases (44%), and in the distal in nine cases (50%). The incidence of aneurysm (1.5%) and intracranial bleeding was low as compared to cases of adult moyamoya disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395611
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  • 2
    Electronic Resource
    Electronic Resource
    Childhood moyamoya disease before and after encephalo-duro-arterio-synangiosis: an angiographic study (1992)
    Springer
    Neuroradiology 34 (1992), S. 318-322 
    Details
    ISSN: 1432-1920
    Keywords: Childhood moyamoya disease ; Encephalo-duro-arterio-synangiosis ; Cerebral angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Encephalo-duro-arterio-synangiosis (EDAS) is a new surgical operation for childhood moyamoya disease, and its effects have been studied by comparing pre-and postoperative angiograms in 27 patients. The development of collaterals from the external carotid arterial system into the territory of the middle cerebral artery was excellent in 16 of 54 cerebral hemispheres after EDAS, good in 25, and poor in 13. The development of collaterals after EDAS increased as the stenotic process in the internal carotid artery on preoperative angiograms increased except in the most advanced cases, where it seemed to decrease in comparison with the group with middle grade stenosis. After EDAS, not only the superficial temporal artery, but also the adjacent middle meningeal artery participated in forming collateral pathways. Furthermore, decrease of abnormal net-like vessels was observed when there was good to excellent development of collateral vessels. Stenotic lesions in the internal carotid and posterior cerebral arteries were often seen to progress, indicative of the rapidly progressive nature of childhood moyamoya disease. These results appear to suggest that EDAS should be performed as early as possible in childhood moyamoya disease before the occurrence of an irreversible ischaemic state and/or permanent neurological defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588191
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  • 3
    Electronic Resource
    Electronic Resource
    Moyamoya disease: diagnostic accuracy of MRI (1995)
    Springer
    Neuroradiology 37 (1995), S. 356-361 
    Details
    ISSN: 1432-1920
    Keywords: Moyamoya disease ; Magnetic resonance imaging ; Cerebral angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Our purpose was to evaluate the diagnostic accuracy of MRI in moyamoya disease. We studied 30 patients with this disease, comparing MRI and angiographic findings. The diagnostic value of MRI was evaluated for occlusive lesions, collateral vessels, and parenchymal lesions. In all patients bilateral occlusion or stenosis of the supraclinoid internal carotid artery and proximal anterior and middle cerebral arteries was clearly shown by MRI, and staging of the extent of occlusion agreed with angiographic staging in 44 (73%) of 60 arteries. MRI, particularly coronal images, clearly showed basal cerebral moyamoya vessels in 54 hemispheres, and 45 of a total of 71 large leptomeningeal and transdural collateral vessels were identified. MRI also showed parenchymal lesions in 48 (80%) hemispheres, and the extent of occlusion in the anterior and posterior circulations respectively correlated with white matter and cortical and/or subcortical infarcts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588011
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  • 4
    Electronic Resource
    Electronic Resource
    Moyamoya disease: diagnostic accuracy of MRI (1995)
    Springer
    Neuroradiology 37 (1995), S. 356-361 
    Details
    ISSN: 1432-1920
    Keywords: Key words Moyamoya disease ; Magnetic resonance imaging ; Cerebral angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Our purpose was to evaluate the diagnostic accuracy of MRI in moyamoya disease. We studied 30 patients with this disease, comparing MRI and angiographic findings. The diagnostic value of MRI was evaluated for occlusive lesions, collateral vessels, and parenchymal lesions. In all patients bilateral occlusion or stenosis of the supraclinoid internal carotid artery and proximal anterior and middle cerebral arteries was clearly shown by MRI, and staging of the extent of occlusion agreed with angiographic staging in 44 (73 %) of 60 arteries. MRI, particularly coronal images, clearly showed basal cerebral moyamoya vessels in 54 hemispheres, and 45 of a total of 71 large leptomeningeal and transdural collateral vessels were identified. MRI also showed parenchymal lesions in 48 (80 %) hemispheres, and the extent of occlusion in the anterior and posterior circulations respectively correlated with white matter and cortical and/or subcortical infarcts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588011
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  • 5
    Electronic Resource
    Electronic Resource
    Polymerization of epoxide with aluminum complex/silanol catalyst. VII. Thermal and electrical properties of epoxy resin cured with the new catalyst (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 269-278 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Curing catalyst for epoxy resins was newly found. The catalyst consists of aluminum complex and silanol. Lack of one component of the pair does not cure epoxy resins. The epoxy resins cured with the catalyst are characterized by excellent electrical properties, especially at high temperature, due to the absence of strong acid species in the cured epoxy resin matrix. Heat-resistant property of the resin was also excellent. These properties were compared with those of epoxy resin cured with commonly used BF3 complex.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070290125
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Infrared spectra of isotopic polyglycines (1966)
    New York : Wiley-Blackwell
    Biopolymers 4 (1966), S. 337-350 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: For infrared absorption measurements, the following five isotopic polyglycines have been prepared: ordinary polyglycine ( - NHCH2CO - )n, N-deuterated polyglycine ( - NDCH2CO - )n, C-deuterated polyglycine ( - NHCD2CO - )n, completely deuterated polyglycine ( - NDCD2CO - )n, and N15-substituted polyglycine ( - 15NHCH2CO - )n. Infrared spectra have been observed both in the I and II forms of each of these five isotopic polyglycines in the spectral region of 4000-300 cm.-1. On the basis of the comparison of these spectra with each other, a nearly complete set of assignments of the observed bands of polyglycines has been given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1966.360040307
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  • 7
    Electronic Resource
    Electronic Resource
    Application of glow discharge optical emission spectroscopy to diffusion measurement of copper in ferritic and austenitic iron and steels (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 19 (1992), S. 638-642 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Glow discharge optical emission spectroscopy (GDOS) is a method to analyse the optical emission of elements during sputtering of a solid, providing data on the light intensities of the elements vs. the sputtering time. By correcting the measured light intensities with standard samples, it is possible to obtain the quantitative depth profile up to about 100 μm. In the present research, GDOS was applied to the diffusion measurement of impurity atoms in metals and alloys. After a thin film of copper was coated on iron and steels, the surface film was diffused into the matrix at high temperatures. The penetration curves of copper from the surface were obtained from the GDOS data. Diffusivities of copper in ferritic and austenitic regions of iron were determined from the penetration curves, which were in agreement with previous results. Diffusion of copper in commercial ferritic and austenitic stainless steels was also examined. The diffusivities obtained were comparable with those expected from the temperature dependence of the diffusivities in the ferritic and austenitic phases of pure iron.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.7401901119
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  • 8
    Electronic Resource
    Electronic Resource
    AES/GDS characterization of thin oxide films on Fe—Cr sheet steels (1991)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 17 (1991), S. 551-555 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Thin oxide films on four kinds of commercial sheet were characterized with Auger electron spectroscopy (AES) and glow discharge optical emission spectroscopy (GDS). Enrichment of alloying elements was noticed in the thin oxide films formed in air. The depth profiles obtained by AES with ion sputtering showed that enrichment of chromium occurred at the interface between the oxide and the matrix. It was difficult with AES to obtain the profiles of silicon and manganese because of overlap of their peaks with the iron peaks on the spectrum. On the other hand, with GDS, silicon and manganese could be analysed quantitatively in thin films that are 〈0.05 μm thick.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740170803
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  • 9
    Electronic Resource
    Electronic Resource
    Quantitative GDOS analysis of oxide films on steels (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 22 (1994), S. 134-138 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method for the quantitative analysis for oxide films on steels by means of glow discharge optical emission spectrometry (GDOS) was investigated. Effective optical emission yields for analysed elements were determined by measuring the emission intensities and sputtering rates of standard samples during discharging under constant conditions. The chemical composition in oxidized samples was obtained from the emission intensities and the effective emission yields, while the sputtered depth was calculated from the emission intensities and effective densities of elements. From measurements of the sputtering of magnetite the effective density for oxygen was estimated as 1820 kg m-3. It was shown that GDOS can be used to determine the quantitative composition and the thickness of the oxide layers on steels.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740220132
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  • 10
    Electronic Resource
    Electronic Resource
    Polymerization of cyclohexene oxide with Al(acac)3-silanol catalyst supported by zeolite and porous silica (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 2541-2550 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization of cyclohexene oxide with Al(acac)3-silanol catalyst supported by zeolite and porous silica has been investigated. Cyclohexene oxide was also polymerized to a lesser extent by a zeolite-silanol catalyst and an Al(acac)3-silica gel catalyst. The catalytic activity of the zeolite-silanol system varied with the zeolite pore size. The catalytic activity of the Al(acac)3-silanol system was enhanced by supporting the catalyst with porous silica or zeolite. The Al(acac)3-silanol catalyst supported by zeolite was especially effective in increasing polymer conversion and molecular weight. Catalytic activity increased with increasing chemical interaction between silanol and porous silica. The molecular weight of the polymers with these catalysts increased in the order zeolite-silanol〉 zeolite-Al(acac)3-silanol 〉Al(acac)3-silanol ≈ Al(acac)3-silanol supported by porous silica〉Al(acac)3-silica gel.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170191014
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