Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Collagen Fibres"”.
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Reconstituted collagen fibres for tissue engineering applications
In vitro, under appropriate conditions collagen molecules spontaneously form fibrils (fibrillogenesis) with the characteristic D-periodic banding similar to native fibrils. Recently, reconstituted collagen fibres have been of interest. Due to their unique advantageous properties, such as high …
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Deformation, yield, relaxation and recovery in partially processed leather
… Long term set only occurs in wet leather when collagen fibres are subject to tension. In wet leather, recovery occurs because collagen fibres return to their initial bent configuration. The long term set of partially processed leather at low strains increases with decreasing moisture content …
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Beitrag zur numerischen Simulation des sitzenden Menschen zur Beurteilung der Auswirkung von Ganzkörperschwingungen
… of the nucleus, the annulus groundsubstance and collagen fibres is approximated with visco-elastic material models. The visco-elastic parameters are also derived by simulating experiments described in literature. For varification of the dynamical behaviour the eigenfrequencies of the model as …
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Comparative histology of human skin.
… to this study. (i) Two histological stains for collagen were compared against each other for the first time, namely Herovici's technique and picrosirius-polarization. (ii) Skin samples from embalmed cadaveric tissue from human cadavers were compared against samples taken from surgical patients. …
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Effect of microstructure on mechanical behaviour of arterial tissue
… tested tissues to investigate the influence of collagen, elastin, macrophage and glycosaminoglycan (GAG) contents, as well as collagen fibre dispersion on the mechanical and fracture behaviours. Both collagen and GAGs were associated with tissue strength, while higher GAG deposition was found to …
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An Investigation Into The Mineral And Mechanical Properties Of The Canine Intervertebral Disc And Its Clinical Implications
… is complex and involves the transformation of collagen fibres, loss of proteoglycans and notochord cells and a reduction in water content; however, how these processes are linked to future disc herniation remains unknown. Most studies to date have focused on imaging changes and histopathology …
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The effect of ageing on the innervation and total collagen content of human colon
… addressed the enteric innervations and total collagen content and its distribution within the functional sublayers, namely: mucosa, submucosa and muscularis externa (circular muscle (CM) and taenia coli (TC)) in ageing human colon. Macroscopically normal ascending (AC) and descending (DC) …
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Basic studies of the cross-linking reaction of collagen with oxazolidine and plant polyphenols
To elucidate the reaction between collagen, condensed tannins and oxazolidine, two prodeiphinidin tannins have been studied: extracts from pecan nutshell pith and myrica esculenta bark. The tannin chemistry study showed pecan tannins are copolymers of catechin and gallocatechin with a ratio 1:6 and …
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Modelling of mechanosensitive morphogenesis and maintenance of cell structure: Application to musculoskeletal cells and tissues
… in the body: integrin-rich fibroblasts lay out collagen fibres in tendon and bone, whilst cadherins hold epithelial soft tissues as well as cardiac muscle together. The nucleation of clusters of adhesive molecules is the first step towards specialising the cells that contain them in order to …
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Prospective Clinical Study of Posterior Cruciate and Meniscofemoral Ligaments of the Knee Joint From Surgical Biopsies and Morphometric Analysis From Thiel Embalmed Knees
… ligaments and bony structures, and microscopic collagen fibres and neural structures, there was no significant difference between sides for both the macroscopic and microscopic analyses, however a sex difference was observed for some macroscopic measurements. Also, in the male and female …
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Deformation and fracture of soft materials for cartilage tissue engineering
… investigated as a method to mimic the nanoscale collagen fibres within cartilage extracellular matrix. A parametric study was conducted to determine how changes to a gelatin solution affect the mechanical properties of the non-woven fibrous mesh. The solution properties had a clear impact on the …
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Morphologische und biomechanische Eigenschaften des Hüftgelenks (Articulatio coxae) des Hundes (Canis familiaris)
… caput ossis femoris. The main direction of the collagen fibres in the joint cartilage and the subchondral bone were traced by means of the split line method. The split line pattern established proof of an existing tension and bending in the acetabulum. Moreover it identified areas of compressive …
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Recapitulating mammary gland development and breast cancer cell migration in vitro using 3D engineered scaffolds
… by an adipocyte-rich fat pad, a highly collagenous extra-cellular matrix (ECM) and a number of other stromal and endothelial cell types. Mammary stem cells (MaSCs) reside within the epithelium and these are capable of repopulating a mammary fat pad that is devoid of epithelium, upon …
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Development of a patient-specific finite element model of the transcatheter aortic valve implantation (TAVI) procedure
… and leaflets, using two and one families of collagen fibres for their tissues respectively. The stent is made of a cobalt-chromium alloy and its mechanical response was modelled as an isotropic elastoplastic material, with a linear elastic initial response, followed by plastic behaviour with …
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Biomechanische Untersuchungen am Fesselgelenk (Articulatio metacarpophalangea) des Pferdes
… no definite preferential orientation of the collagen fibres in the subchondral bone of the fetlock joint. Therefore it is not possible to draw any conclusions concerning physiological incongruence of this articulation. In animals from 3 months to 2 years of age a change in the trochlear …
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MORPHOMETRIC AND MOLECULAR STUDIES OF THE CORRELATION BETWEEN CHRONIC MASTITIS AND INFERTILITY IN DAIRY CATTLE
… ± confidence limits. Stromal cells with matrix collagen fibres were visualized with Masson trichrome staining. Vasculature area in the ovarian cortex of healthy and mastitic animals was identified using Bandeiraea simplicifolia-I (BSL-I) Lectin. Results were quantified with the dedicated …
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Leather Futures: How leather can be used as a sustainable material of choice for the future
… and upcycling leather wastes into bonded collagenic fibres which address the end-of-life directive in the automotive industry. Finding knowledge gaps through the literature review, this research proposes leather as an eco-informed material choice (Ashby 2009) and it introduces new …
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Multiscale Characterisation of Ice and Collagen: Physicochemical Development of Lyophilised Scaffolds for Tissue Engineering
… determine cellular response to ice-templated collagen-based constructs can be fine-tuned by modulating the scaffold fabrication process. To produce lyophilised scaffolds, ice crystals are grown in an aqueous collagen suspension then sublimed to create a highly porous and interconnected …
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Fabrication and Optimisation of Collagen Scaffolds for Muscle Cell-Supported Angiogenesis
… this Thesis describes the development of 3D collagen scaffolds capable of supporting differentiated muscle cell populations with the potential for vascularisation. Collagen I scaffolds with varying internal architectures were fabricated and characterised, cell-material interactions were …
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Production of Multi-layer and Cell-Containing Collagen Membranes Using Direct Electrophoretic Deposition
… tissues generally comprise cells embedded in a collagen-based extracellular matrix (ECM). The most abundant form of collagen is type I, which is therefore a logical choice for tissue repair applications, such as wound healing and vascular structures. Collagen membranes can be produced using …
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