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 30 for “"Cellular Material"”.
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The elastic and plastic behaviour of cellular materials
Cellular materials are widespread. Some, like wood and bone, occur in nature, while others, like polymeric foams, are manmade. Because of their cellular structure, they have unusual mechanical properties: they can be stiff, yet light, and they are capable of absorbing large deflections and thus …
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STUDIES IN THE DEVELOPMENT OF A XENOGRAFT-DERIVED BONE SCAFFOLD
… bone of porcine (pig) femurs using a novel decellularization and chemical oxidation protocol. In the following chapters we discuss the development and characterization of this bone scaffold. The presented results show the decellularization protocol is able to efficiency remove porcine cellular …
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Studies of the division cycle of human cancer cells (HELA) using a new system for continuous synchronization
… culture through more than ten generations. Cellular DNA and RNA have been determined at hourly intervals throughout the cell cycle defining the pattern of nucleic acid accumulation in HeLa cells. Cellular activity of the enzymes thymidine kinase, alkaline DNase, catalase, acid phosphatase …
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Cellular and genetic mechanisms of new tissue production in the regenerating planarian Schmidtea mediterranea
… planarian heads, require both a source for new cellular material as well as mechanisms to specify, differentiate, and pattern the regenerate. The planarian Schmidtea mediterranea is a classic system for studies of regenerative biology in which proliferating cells known as "neoblasts" provide the …
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Development of tissue printed nitrocellulose cards/arrays for real time PCR amplification and detection
… print technology allows for the transfer of cellular material from tissue onto a nitrocellulose film for immunocytochemical assays. The MIT BioInstrumentation Laboratory is currently developing a novel cancer marker imaging system for detection of cancerous tissue, which will be useful for …
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Investigations of flakeboard mat consolidation
… is a function of mat structure, raw material properties and the environmental conditions created during pressing. This research project was aimed at improving the understanding of raw material behavior during the hot-pressing of wood based composites by examining the response of a …
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Investigation and improvment of noise, vibration and harshness(nvh) properties of automotive panels
… and computational methods, six groups of sample materials - fabric, foam, honeycomb, monolithic and sandwich, periodic cellular material structures (PCMS), and generally periodic materials, to assess their suitability for maximum containment of noise and vibration. Various architectural forms …
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Naujo tetrakatijoninio porfirino sukeltos Escherichia coli fotopažaidos /
… (TN-Et-PyP), its interaction with different cellular components and to analyse the photodynamic action of the porphyrin on the integrity and selected functions of E. coli KMY1 cell membranes. It was shown that tetracationic TN-Et-PyP symmetry changes strongly depend on the polarity of the …
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Investigating processing body condensation, material properties and function during early Drosophila development
… in physiology, pathology, and therapeutics. Cellular material can be organised into membrane-bound or membrane-less compartments. The latter, commonly known as biomolecular condensates, often contain ribonucleoprotein assemblies that form via liquid-liquid phase separation. Conserved across …
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Effect of mean cell residence time on the base hydrolytic assist activated sludge process
… This treatment will solubilize most of the cellular material which can then be reintroduced to the aeration tank after pH neutralization. No sludge is wasted; it is all recycled as hydrolyzed sludge. The main objective of this research was to operate laboratory activated sludge units over a …
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Extracellular matrix stiffness and geometry: The impact on static and dynamic cellular systems in vitro and the treatment of tissue ischemia
… very important for biopharmaceutical industry. Cellular material for such applications can represent static cultures that do not change over time, or dynamic (i.e. transformational) cultures based on pulripotent cells undergoing “cellular metamorphosis” and differentiating into a multitude of …
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Flexigami : folded polygonal unit cells for deployable metamaterials and mechanisms
… with cutting, folding, and fastening of sheet materials. However, contrasting the classical approach of modeling Origami structures as having perfect hinges and rigid panels, consideration of the finite bending and rotational stiffness of these elements is essential to understand their …
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Lipid accumulation and utilization during microcycle growth of Aspergillus niger.
… throughout the cycle. The majority of the material was used in the production of insoluble cellular material, with smaller amounts incorporated into lipids, water-soluble materials or released as carbon dioxide. Very little label from L-glutamate was detected as lipid. Glutamate was …
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An automated multicolour fluorescence in situ hybridization workstation for the identification of clonally related cells
… number profiling rely on large amount of cellular material, which is not always available and suffers from limited sensitivity to only the most dominant clone in often heterogeneous samples. Thus, through the use of FISH, the detection of gene copy-numbers is possible in unprocessed …
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A numerical & experimental investigation into size effects within loaded additively manufactured cellular solids
The behaviour of heterogeneous materials when loaded cannot be adequately described by classical elasticity as it doesn't account for the presence of internal length-scales. Higher order theories such as micropolar elasticity may be more appropriate, though the additional elastic constants required …
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Rheology of chocolate. Rheological studies of chocolate in relation to their flow and mixing properties during manufacture.
… surface coating and fat release from the cocoa cellular material. Analysis of the sugar and cocoa butter system gave large hysteresis loops which may be explained as due to agglomeration of the sugar particles. The level of hysteresis was found to be related to the polarity of the liquid phase, …
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Natural fiber reinforced aerated concrete : an experimental investigation
… aerated concrete. Concrete is a great composite material which can be created in various proportions and with various materials to alter its strength, density and porosity, amongst other properties. Concrete which is used commonly in construction of columns, beams, and slabs acts well in …
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Somatic evolution in normal human endometrium
… workflow for laser-capture micro-dissected cellular material. I then utilised this approach to explore the genomic and evolutionary landscapes of the normal human endometrium. In the first results chapter, I investigate the clonal composition of normal endometrial glands. The majority of …
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Coordinated regulation of glycolysis and the folate one-carbon cycle
… with anabolic reactions to generate new cellular material, but how aerobic glycolysis supports proliferative metabolism is not well understood. Pyruvate kinase (PK) catalyzes the last step in glycolysis, and while there is no evidence that PK activity is limiting for glycolysis, all …
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Mass spectrometric studies of ether lipids in Archaea and sediments
… regarding their structure on-line. Analysis of cellular material from species of Methanothermobacter and Sulfolobus revealed tetraether lipid cores which contain up to four cyclopentyl rings per etherified alkyl chain, including structures identified previously in each genera. Identical …
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