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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimie 70 (1988), S. 119-130 
    ISSN: 0300-9084
    Keywords: picornavirus ; proteolytic processing ; viral proteinase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Food Chemistry 2 (1977), S. 95-105 
    ISSN: 0308-8146
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 114 (1986), S. 222-226 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    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
    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
    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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  • 7
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Depuis 1987 les auteurs ont entrepris de remplacer par des vis les crochets de l'instrumentation de Cotrel-Dubousset dans le traitement de la scoliose y compris dorsale. L'objet de cette étude est de comparer le résultat du traitement des malades scoliotiques idiopathiques soit par des vis pédiculaires, soit par des crochets. Elle porte sur 82 scoliotiques traités de 1987 à 1991, suivis 36 mois en moyenne (de 24 à 52 mois) et divisés en trois groupes selon la fixation de l'implantation. Vingt patients ont été fixés seulement par des crochets, 47 par des vis et des crochets (groupe mixte) et 15 par des vis seulement. Dans la correction de la courbure frontale le groupe crochet a atteint 49% (de 59° pré-op. à 30° post-op.) le groupe mixte 60% (de 58° a 23°) et le groupe vis 63% (de 51° a 19°). Pour les malades ayant une cyphose pré-opératoire inférieure à 15°, il y avait une amélioration importante de la courbure sagittale dans tous les groupes. Pour les malades normo-cyphotiques il n'y avait aucune modification significative. Vis à vis de la déformation rotatoire, mesurée par la méthode de Perdriolle, le groupe crochet a entraîné une correction de 19%, le groupe mixte de 24% et le groupe vis de 26%. La fixation par vis peut s'appliquer au traitement de la scoliose dorsale sans complication neurologique, permettant une fixation rigide et une stabilité immédiate après l'intervention, corrigeant mieux la déformation dans les trois plans, comportant moins de perte de la correction et moins de risque neurologique et obtenant plus rapidement la fusion. La technique instrumentale est plus simple, ce qui diminue la durée de l'opération.
    Notes: Summary Eighty-two patients with idiopathic scoliosis were treated by Cotrel-Dubousset instrumentation between 1987 and 1991. Twenty were treated with hooks only, 47 with screws and hooks, and 15 with screws only. The methods were compared and the findings showed that screw fixation can be used in the thoracic spine without neurological complications. The screws provided immediate stability with rigid fixation, together with better correction of frontal, sagittal and rotational deformity. There is less loss of correction, a shorter fusion and less risk of neurological complications because of the placement outside the spinal canal and the rigid fixation in derotation. The technique was simpler and the operating time shorter than with the other methods.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 16 (1992), S. 277-281 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Description d'une nouvelle méthode de mesure de l'antéversion fémorale que l'on peut considérer comme une modification de celle de Magilligan. On pratique deux clichés radiographiques: une vraie hanche de face et un profil de hanche, au lieu du profil du col de la méthode de Magilligan. On mesure les angles aigus α et γ formés par les axes de la diaphyse et du col sur les deux clichés. L'angle γ' d'antéversion est obtenu par la formule trigonométrique: $$tan \gamma = tan \gamma /tan \alpha .$$ L'antéversion fémorale été mesurée sur 20 fémurs secs d'adultes et sur les 40 fémurs de 20 enfants par la méthode de Magilligan, par celle des auteurs et par tomodensitométrie. Par comparaison avec la mesure directe faite sur les fémurs secs on a trouvé que la méthode de Magilligan et celle des auteurs ont tendance à sur-estimer et la tomodensitométrie à sous-estimer (p〈0.05) l'antéversion. Sur les fémurs d'enfants une tendance similaire a été notée avec les trois méthodes et les mesures obtenues par chacune d'entre elles étaient significativement différentes (p〈0.05). Nous pensons que notre méthode de mesure de l'antéversion fémorale est plus précise, bien que sans doute relativement, que celle de Magilligan. Elle présente par ailleurs certains avantages pratiques, l'installation du malade est plus facile, la rotation mieux contrôlée et la réalisation des radiographies est plus rapide.
    Notes: Summary A new biplanar method of measuring femoral anteversion, which may be considered a modified Magilligan's method, is described. In addition to the true antero-posterior radiograph, a true translateral radiograph is taken, instead of a transcervical lateral radiograph as in the Magilligan method. The acute angles (α and γ) between the long axes of the shaft and neck of the femur on both the antero-lateral and lateral radiographs are measured. The angle (γ′) of anteversion is obtained by the trigonometric formula; $$tan \gamma = tan \gamma /tan \alpha .$$ The femoral anteversion in 20 adult dried femora and 40 femora in 20 children was measured by the Magilligan method, the authors' method and the conventional CT method. Compared with direct measurement in the dried femora, it was found that both the Magilligan and the authors' methods tended to overestimate and the CT method tended to underestimate (p〈0.05) the anteversion. In children's femora, a similar trend was observed among the three methods and the measurements by each method differed significantly from the other (p〈0.05). We feed that our method of biplanar measurement of femoral anteversion is more accurate, although probably marginally, than the conventional Magilligan method. It also has some relative advantages in clinical application in that positioning is easier, rotation is better controlled, and less time is consumed.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Shock waves 5 (1996), S. 275-285 
    ISSN: 1432-2153
    Keywords: Shock reflection ; Diffraction ; Shadowgraph ; Vortex ; Turbulence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics , Technology
    Notes: Abstract The accuracy of four industrial shock hydrodynamics codes for blast environments in baffled systems is evaluated based on the shadowgraph data of Reichenbach and Kuhl (1992,3). Both problems involve a planar shock passing through a baffled channel. The numerical methods employed in these codes are representative of two classes, namely, the set of high-resolution schemes advanced in the 1980's, and the classical finite-difference schemes from the late 1960's. The four codes are: (1) the AMR code based on the higher-order Godunov scheme with adaptive grids, (2) the FEM-FCT code based on the flux-corrected transport scheme with unstructured grids, (3) and (4) the finite-difference based HULL and SHARC codes with fixed grids. From the comparisons of these calculations it is concluded that the high-resolution schemes: (1) calculate sharper shocks and sharper density profiles across vortices, (2) predict shear layer rollup forming coherent structures in the spiral vortices immediately down-stream of every baffle, and (3) predict development of inviscid instabilities from these shear layers that, upon interaction with the reverberating shocks in the system, quickly become ‘turbulent’. The finite-difference codes predict essentially laminar behavior for the shear layers. Comparisons with shadowgraph data suggest that both classes of codes are able to predict shock reflections and diffractions in the baffled systems. The high-resolution codes give better agreement in the spiral vortices and the shear layers. As expected, turbulent flow features involving highly dissipative flow fields are not predicted by the high-resolution codes.
    Type of Medium: Electronic Resource
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  • 10
    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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