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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 258 (1980), S. 917-922 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Struktur und Vorzugsorientierung einer Reihe von Kohlefasern mit verschiedenen Graphitierungsgraden wurden röntgenographisch untersucht. Die Beziehung zwischen Vorzugsorientierung und Elastizitätsmodul ist verschieden von der für nichtgraphitische Kohlefasern beobachteten. Der Unterschied wird durch eine Zunahme der Schernachgiebigkeit der Strukturbausteine mit zunehmender Graphitierung erklärt, die bei konstanter Vorzugsorientierung eine Verminderung des Elastizitätsmoduls der Fasern mit steigender Graphitierung zur Folge hat.
    Notes: Summary Structure and preferred orientation of a series of carbon fibers with various degrees of graphitization have been studied by X-ray diffraction. The relationship between preferred orientation and Young's modulus differs from that reported for non-graphitic carbon fibers. The difference is explained by an increase of the shear compliance of the structural unit with increasing graphitization which results, for constant preferred orientation, in a decrease of the Young's modulus of the fiber with increasing graphitization.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 261 (1983), S. 744-749 
    ISSN: 1435-1536
    Keywords: Fluorination ; carbon fibers ; CF fibers ; mechanical properties ; preferred orientation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The fluorination of carbon fibers results in a partial or total conversion of the carbon layers into CF layers. In constrast to the formation of intercalation compounds of carbon fibers, the fluorination causes considerable changes in the fiber texture which results in a marked decrease of tensile modulus and mechanical strength. The relationship between the structural changes and the resulting mechanical properties is studied by small-angle and wide-angle X-ray scattering.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 260 (1982), S. 174-181 
    ISSN: 1435-1536
    Keywords: Polyethylene ; ultra-high modulus ; deformation process ; entanglements ; preferred orientation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The relationship between formation, structure and tensile modulus of ultrahigh modulus polyethylene is explained on the basis of a structural model in which entanglements formed during the deformation process play an important rôle. The results of wide- and small-angle X-ray scattering are interpreted in terms of structural parameters derived from this model.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 6 (1984), S. 215-223 
    ISSN: 1279-8517
    Keywords: Functional anatomy ; Knee ; Musculus semimembranosus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La dissection de 18 genoux de cadavres frais permet de préciser la terminaison distale du muscle semi-membranosus. Elle est exclusivement tibiale par trois tendons qui rendent ce muscle fonctionnel quelle que soit la position du genou. Les autres faisceaux parfois décrits ne sont que des expansions aux formations ménisco-tibiale et ménisco-fémorale dont il faut dissocier cette terminaison distale. Une étude électromyographique, réalisée chez 17 sujets confirme que ce muscle est plus un frein de la rotation externe qu'un rotateur interne, d'autant plus que la hanche est en flexion et le genou en extension.
    Notes: Summary The dissection of 18 knees taken from fresh cadavers has led to a detailed description of the semimembranosus muscle (musculus semimembranosus). It is exclusively tibial with its three tendons rendering the muscle functional, whatever the position of the knee may be. There are other attachments, sometimes described are merely expansions extending to the meniscotibial and menisco-femoral formations, from which this distal termination must be distinguished. Electromyography performed on 17 specimens confirms that this muscle serves more as a brake on outer rotation than an inner rotator muscle, especially when the hip is flexed and the knee stretched.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 6 (1984), S. 19-22 
    ISSN: 1279-8517
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusion La dissection anatomique permet de dissocier la terminaison distale du muscle demi-membraneux des formations méniscocapsulo-ligamentaires postero-internes. Trois tendons terminaux résistants sont individualisés, mais leur terminaison est uniquement tibiale. Les expansions capsulaires issues de sa gaine restent indépendantes de ces trois tendons. Le muscle demi-membraneux, fléchisseur du genou, extenseur de la hanche, et freinateur de l'extension de jambe sur la cuisse possède une action rotatrice interne limitée lorsque la hanche est étendue. Cette action de rotation interne n'est pas comparable avec celle de rotation externe du muscle biceps femoris caput breve et parler de ≪ biceps interne ≫ est impropre. En revanche, son action de frein de la rotation externe est mise en évidence par l'intensité de l'activité électrique enregistrée pendant ce mouvement. Elle apparaît d'autant plus importante que le muscle est mis en tension par la flexion de la hanche et l'extension du genou.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 261 (1983), S. 717-720 
    ISSN: 1435-1536
    Keywords: Polyethylene ; high modulus ; hot-drawing ; pressure crystallization ; entanglements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The change of the drawing behaviour of polyethylene is studied as a function of molecular weight and crystallization pressure. The results are interpreted using the entanglement concept for the correlation between draw ratio, tensile modulus and molecular weight. Pressure crystallization of the starting material appears to reduce the number of entanglements formed during the drawing process and increases the maximum obtainable tensile modulus for samples of medium molecular weight.
    Type of Medium: Electronic Resource
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