MECHANICAL PROPERTIES AND HYDROXYPROLINE CONTENT OF CONNECTIVE TISSUE IN POROUS CERAMIC IMPLANTS

2009 ◽  
Vol 87A (1-6) ◽  
pp. 193-200
Author(s):  
HENRIK WIE ◽  
EVA I. BECK
Keyword(s):  
Mechanical Properties ◽  
Connective Tissue ◽  
Porous Ceramic ◽  
Hydroxyproline Content ◽  
Ceramic Implants

Local Strengthening of EN AC-44200 Al Alloy with Ceramic Fibers

2015 ◽  
Vol 662 ◽  
pp. 237-240 ◽  
Author(s):  
Krzysztof Naplocha ◽  
Jacek W. Kaczmar ◽  
Jerzy Morgiel
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Composite Materials ◽  
Squeeze Casting ◽  
Porous Ceramic ◽  
Al Alloy ◽  
Ceramic Fibers ◽  
Ceramic Particles ◽  
Casting Technique ◽  
University Of Technology

The applied squeeze casting technique makes possible the local strengthening with ceramic fibers or ceramic particles of elements with Al-alloy matrices. In this paper the elaborated technology of manufacturing of porous ceramic preforms from Saffil fibers is shown and technology of squeeze casting elaborated at Wrocław University of Technology, Chair Foundry, Polymers and Automation described. There were applied the preforms characterized by porosities of 90% and 80%, what after squeeze casting with liquid EN AC - 44200 Al alloy produces the composite materials containing 10 vol. and 20 vol.% of fiber strengthening. The structural phenomena at the interface of strengthened alloy investigated with the optical and electron microscopy are discussed and the mechanical properties of manufactured composite materials are shown.

scholarly journals CAMM Techniques for the Prediction of the Mechanical Properties of Tendons and Ligaments Nanostructures

2005 ◽  
Vol 5 ◽  
pp. 564-570
Author(s):  
Simone Vesentini ◽  
Franco M. Montevecchi ◽  
Alberto Redaelli
Keyword(s):  
Mechanical Properties ◽  
Molecular Modeling ◽  
Connective Tissue ◽  
Soft Tissues ◽  
Collagen Molecule ◽  
Computer Assisted ◽  
Mechanical Function ◽  
Top Down ◽  
Structural Constituent ◽  
Structures And Properties

Theoretical prediction of the mechanical properties of soft tissues usually relies on a top-down approach; that is analysis is gradually refined to observe smaller structures and properties until technical limits are reached. Computer-Assisted Molecular Modeling (CAMM) allows for the reversal of this approach and the performance of bottom-up modeling instead. The wealth of available sequences and structures provides an enormous database for computational efforts to predict structures, simulate docking and folding processes, simulate molecular interactions, and understand them in quantitative energetic terms. Tendons and ligaments can be considered an ideal arena due to their well defined and highly organized architecture which involves not only the main structural constituent, the collagen molecule, but also other important molecular “actors” such as proteoglycans and glycosaminoglycans. In this ideal arena each structure is well organized and recognizable, and using the molecular modeling tool it is possible to evaluate their mutual interactions and to characterize their mechanical function. Knowledge of these relationships can be useful in understanding connective tissue performance as a result of the cooperation and mutual interaction between different biological structures at the nanoscale.

Der Einfluß von D-Penicillamin auf den Gehalt einiger Organe an Spurenelementen sowie auf die mechanischen Eigenschaften von Kollagen / Trace Elements in Several Organs and Mechanical Properties of Collagen under the Influence of D-Penicillamin

1978 ◽  
Vol 33 (5-6) ◽  
pp. 346-358 ◽  
Author(s):  
H. Wesch ◽  
R. Jonak ◽  
H. Nemetschek-Gansler ◽  
H. Riedl ◽  
Th. Nemetschek
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Schiff Base ◽  
Connective Tissue ◽  
Functional Groups ◽  
Schiff Bases ◽  
Collagen Fibrils ◽  
Principal Effect ◽  
Tail Tendon ◽  
Cu Ions

Abstract The content of trace elements in several organs of rats under the influence of D-penicillamine (D-PA) was investigated by the neutronactivation-analysis. It could be shown an diminution of Cu, and Co under D-PA-treatment, the content of Fe, Mn, Rb and Zn was not influenced. The investigat­ ed organs didn’t show any submicroscopic alterations under D-PA. On isolated collagen fibrils of tail tendon was seen a significantly diminuition of E-moduls. In accordance with Siegel the principal effect of D-PA is thought to block the synthesis of functional groups from Schiff-base crosslink precursors but not to inhibit lysyloxidase by loss of Cu-ions of connective tissue. The thermostability of D-PA influenced fibrils is changed in stretched state only and will be due to the lack of crosslink Schiff-bases; where as the shrinking point of not stretched fibrils shows only aging dependent changes.

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