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 39 for “"living tissue"”.
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Rheology and Collective Behavior in Living Tissue
… of its consequences in biological processes. Do tissues tune themselves to a fluid state in order to promote collective motion? Has evolution made use of the ability of tissues to tune themselves between fluid and solid states in programming the complex steps leading from the embryo to the …
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Development of a Phantom Tissue for Blood Perfusion Measurements and Noninvasive Blood Perfusion Estimation in Living Tissue
… perfusion sensors has been developed. A phantom tissue model is used to mimic the non-directional blood flow of tissue perfusion. A computational fluid dynamics (CFD) model was constructed in Fluent to design the phantom tissue and validate the experimental results. The phantom perfusion system …
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Three dimensional weaving of tubular structures
… implantation of artificial stents in place of living tissue. If living tissues could be used instead of synthetic fibers, the body's immune system would not reject the repair. This thesis covers the design and implementation of a weaving machine that is capable of weaving living tissue into …
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Soft, wireless electronics for the thermal characterization of skin and soft tissue
… sensors to monitor physical biomarkers in living tissue are rigid, bulky and often require wired electronic connections for power and data transfer. Recent work has established a set of design principles that allow for the integration of traditionally rigid sensing electronics and wiring …
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Entwicklung und Erprobung eines porösen TiO 2-Glas-Verbundes als Knochenersatz
… influenced by edge effects. Biocompatibility to living tissue is proven with an integrated evaluation chain. A concept to link interface-active proteins has been applied successfully. In its biofunction as implant in the cervical spine of sheep the ceramic composite and bone cement achieve the …
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Tumor vasculature and microenvironment during progression and treatment : insights from optical microscopy
… tumors consist of a variety of cell types and tissues defining a complex microenvironment that influences disease progression and response to therapy. To fully characterize and probe the tumor microenvironment, new tools are needed to quantitatively assess microanatomical and physiological …
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S.N.A.K.E. : a dynamically reconfigurable Artificial Sensate Skin
… characteristics and functions of its analogous living tissue whether human or animal is not new. Yet, most of the current related work has been focused in the development of either materials, flexible electronics or ultra-dense sensing matrices and Wide Area Sensor Networks. The current work …
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MODELING REORGANIZATION OF PCF10-INDUCED COMPLEX STRUCTURES IN ENTEROCOCCUS FAECALIS UNDER ERYTHROMYCIN TREATMENT
… and develop on a range of surfaces including living tissue. Biofilms themselves typically do not negatively affect their host, but under certain conditions they can retain pathogenic features and cause a wide range of illnesses including persistent or chronic infections. In this dissertation, …
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On the fundamental imaging-depth limit in two-photon microscopy
… high-resolution images from very deep within living tissue. While imaging depths of 500 micron in brain tissue have become standard performance, larger depths have been inaccessible mainly due to the power limitation of current femto-second laser sources. Here we investigate strategies to …
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Multiphoton microscopy for stain-free slide-free histopathology
… and interpretation of histological images of tissue is well accepted as the gold standard process for the diagnosis of disease. These methods have a long history of development, and are used ubiquitously in pathology, despite being highly time- and labor-intensive. Label-free nonlinear optical …
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The killing of plant tissue by low temperature
… set of phenomena in plants. With all plant tissues, when a certain temperature is reached very shortly after thawing, it will be found that the tissue has taken on a brown, water-soaked appearance, and evaporation from that tissue is much more rapid than from living tissue. In the …
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The management of corneal graft rejection
… the replacement of damaged corneas with living tissue, but the credit is usually attributed to Franz Reisinger6 who also coined the term 11 keratoplasty11 • Reisinger confined his work to rabbits and chickens but most grafts failed either from opacification or sepsis. His work, however, …
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Computational and Experimental Modeling of the Bioheat Transfer Process of Perfusion in Tissue Applied to Burn Wounds
… blood perfusion and thermal resistance in living tissue. Dynamic thermal measurements collected at the surface of the sensor before and after imposing a dynamic thermal cooling event are used with the model to estimate the blood perfusion, thermal resistance and core temperature. The …
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Optical Imaging Of Tissue Physiology With Exogenous Contrast Agents
… optically emitting exogenous contrast agents in living tissue. The first set of experiments concurrently measured cerebral blood flow and bothintravascular- and extravascular-tissue oxygen concentration in a rat brain during functional activation; the new instrumentation needed to collect this …
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Aorto-enteric Fistula Following Abdominal Aorta Surgery
… a Dacron or Teflon prosthesis, interposition of living tissue between the vessel anastomosis and the bowel, and careful placement of sutures in the vessel anastomosis. If infection of the graft coexists the graft must be excised and the aorta closed by sutures. </p>
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Dense Collagen Materials and the Modulation of Fibrillogenesis for Tissue Engineering
Native tissues regulate cell behaviour through a finely balanced interplay of biochemical and mechanical cues that synthetic materials and nylon membranes cannot reproduce. This thesis presents a platform of densified collagen scaffolds that bridges the gap between synthetic materials and living …
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The extraction of type 1 collagen and the fabrication of multi-filament embedded hydrogels for guided nerve regeneration
… constituent of the extra- cellular matrix of living tissue. In this project, fabrication of novel constructs for nerve tissue guidance was carried out using homogenous hydrogels and multi-filament arrays of wet-spun fibers/hydrogel composites derived from extracted type I collagen. A …
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Application of attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy to measure sub-lethal effects of potential mutagens
… can be carried out ex vivo or in situ in living tissue, where a reference range of a designated normal state can be derived, and anything lying outside this range is potentially atypical. Computational approaches allow one to minimize within-category confounding factors. The application of …
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Low-power switched-capacitor amplifier and Sigma-Delta modulator design for integrated biosensor applications
Neurotransmitters are chemicals present in living tissue which regulate biological functions. Some neurotransmitters which are present in the brain, such as nitric oxide (NO), are believed to play a role in the process of cellular migration during development. Today there is no practical way to …
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A Geant4 Simulation Study Of A Xenon-Doped Liquid Argon, Full-Body, Time-of-Flight Positron Emission Tomography Scanner To Understand Its Performance And Noise Profile
… is used to observe metabolic processes within living tissue. It works by reconstructing the annihilation origin of incident gamma rays produced by a positron emitting radiotracer. This field of nuclear imaging has seen a steady improvement of PET imaging largely due to the application of newer …
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