1000 resultados para Reverse art


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Integrated approaches using different in vitro methods in combination with bioinformatics can (i) increase the success rate and speed of drug development; (ii) improve the accuracy of toxicological risk assessment; and (iii) increase our understanding of disease. Three-dimensional (3D) cell culture models are important building blocks of this strategy which has emerged during the last years. The majority of these models are organotypic, i.e., they aim to reproduce major functions of an organ or organ system. This implies in many cases that more than one cell type forms the 3D structure, and often matrix elements play an important role. This review summarizes the state of the art concerning commonalities of the different models. For instance, the theory of mass transport/metabolite exchange in 3D systems and the special analytical requirements for test endpoints in organotypic cultures are discussed in detail. In the next part, 3D model systems for selected organs--liver, lung, skin, brain--are presented and characterized in dedicated chapters. Also, 3D approaches to the modeling of tumors are presented and discussed. All chapters give a historical background, illustrate the large variety of approaches, and highlight up- and downsides as well as specific requirements. Moreover, they refer to the application in disease modeling, drug discovery and safety assessment. Finally, consensus recommendations indicate a roadmap for the successful implementation of 3D models in routine screening. It is expected that the use of such models will accelerate progress by reducing error rates and wrong predictions from compound testing.

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Comprend : [pl.I en reg. p.78 : moulin à sucre de canne employé en Amérique.] [Cote : V 3992/Microfilm R 122 218] ; [pl.II en reg. p.78 : cellier où l'on stocke les barils de sucre brut. Raffinage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.III en reg. p.78 : la halle aux chaudières. Raffinage du sucre. Planche gravée d'après un dessin de M. Desfriches.] [Cote : V 3992/Microfilm R 122 218] ; [pl.IV en reg. p.78 : la halle aux chaudières. Raffinage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.V en reg. p.78 : comment sont montée les chaudières pour le raffinage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.VI en reg. p.78 : diverses formes pour monter les pains de sucre. Raffinage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.VII en reg. p.78 : comment travailler au traitement et au raffinage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.VIII en reg. p.78 : un grenier dit aux pièces. Raffinage et stockage du sucre.] [Cote : V 3992/Microfilm R 122 218] ; [pl.IX en reg. p.78 : préparation des pins de sucre avant de le mettre à l'étuve. Manière de les mettre en papier et en corde. La mise en tonne. Le travail des écumes.] [Cote : V 3992/Microfilm R 122 218] ; [pl.X en reg. p.78 : détail d'une étuve à sucre.] [Cote : V 3992/Microfilm R 122 218]

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Introduction: Several methods have already been proposed to improve the mobility of reversed prostheses (lateral or inferior displacement, increase of the glenosphere size). However, the effect of these design changes have only been evaluated on the maximal range of motion and were not related to activities of daily living (ADL). Our aim was thus to measure the effect of these design changes and to relate it to 4 typical ADL. Methods: CT data were used to reconstruct a accurate geometric model of the scapula and humerus. The Aequalis reversed prosthesis (Tornier) was used. The mobility of a healthy shoulder was compared to the mobility of 4 different reversed designs: 36 and 42 mm glenospheres diameters, inferior (4 mm) and lateral (3.2 mm) glenospheres displacements. The complete mobility map of the prosthesis was compared to kinematics measurement on healthy subjects for 4 ADL: 1) hand to contra lateral shoulder, 2) hand to mouth, 3) combing hair, 4) hand to back pocket. The results are presented as percentage of the allowed movement of the prosthestic shouder relative to the healthy shoulder, considered as the control group. Results: None of the tested designs allowed to recover a full mobility. The differences of allowed range of motion among each prosthetic designs appeared mainly in two of the 4 movements: hand to back pocket and hand to contra lateral shoulder. For the hand to back pocket, the 36 had the lowest mobility range, particularly for the last third of the movement. The 42 appeared to be a good compromise for all ADL activities. Conclusion: Reverse shoulder prostheses does not allow to recover a full range of motion compared to healthy shoulders, even for ADL. The present study allowed to obtain a complete 3D mobility map for several glenosphere positions and sizes, and to relate it to typical ADL. We mainly observed an improved mobility with inferior displacement and increased glenosphere size. We would suggest to use larger glenosphere, whenever it is possible.

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