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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 81 for “"Biomineralization"”.
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The Role of Enamel Matrix Protein Amelotin on Biomineralization
… due to the lack of knowledge of the natural biomineralization process of tooth tissues. Dental enamel plays a crucial role in preventing the tooth from destruction. However, if damaged or lost, it cannot be regenerated. Understanding the molecular mechanisms behind formation of enamel would …
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Biomineralization in cement based materials : inoculation of vegetative cells
… in cement-based systems focuses on using biomineralization processes. Biomineralization is biochemical process in which microorganisms stimulate the formation of minerals. The existing research on biomineralization in cement-based systems has showed promising results and the studies …
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Biochemical approaches to investigate biomineralization of magnesium calcite and aragonite
Biominerals are composites containing a very low percentage of organic matrix amidst a dense mineral phase. Despite having low organic contents, these natural materials are superior to most other synthetic composite ceramics in mechanical strength and toughness. Since biominerals are synthesized at …
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In Situ Liquid Cell Transmission Electron Microscopy Studies of Pathological Biomineralization
Pathological biomineralization is a highly dynamic process that underlies a range of diseases, such as kidney stone formation and atherosclerosis. Despite its clinical significance, much of what drives these crystallization events at the nanoscale remains poorly understood. This work leverages …
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Effect of ionic strength on heterogeneous nucleation of calcite during biomineralization
Biominerals often form within a matrix of biomacromolecules in high-salinity environments, yet the relationships for how macromolecules and ionic strength influence the crystallization of sparingly soluble salts (e.g., CaCO₃) are not established. Developing a physical picture of these controls is …
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Understanding ureolytic calcium carbonate biomineralization for crack repair in cementitious materials
… evaluation of the healing efficiency of biomineralization in concrete also requires further verification. By isolating the bacteria, chemicals and nutrients required in the biomineralization process, this dissertation investigates their influence on CaCO3 precipitation. Although cement …
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Establishing a physical and chemical framework for Amorphous Calcium Carbonate (ACC) biomineralization
Recent advances in high-resolution analytical methods have brought about a paradigm shift in our understanding of how crystalline materials are formed. The scientific community now recognizes that many earth materials form by multiple pathways that involve metastable intermediates. Biogenic calcium …
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Effects of the 1982-1983 El Niño mega event on bivalve mollusk biomineralization
… in the affected area. These data indicate that biomineralization changes are not synchronized with isotopic signatures. Furthermore, bivalve biogeochemical proxies may not be sufficiently sensitive to detect rapid fluctuations in SST, but potentially useful in detecting other localized El Niño …
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Mechanical and Cellular Response to Biomineralization of Ovalbumin Scaffolds for Bone Tissue Engineering
… OVA and phosphonated OVA (p-OVA) samples via biomineralization processes using 5x-concentrated simulated body fluid (5x SBF). Electron microscopy (ESEM/EDS) data confirm the formation of Ca-P crystals on the surface of OVA and p-OVA scaffolds. Mechanically, rheology data measured a minimum of …
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BIOMINERALIZATION AND GLOBAL CHANGE: BIOTIC RESPONSE TO THE GONDWANAN GLACIATION AND SUBSEQUENT CLIMATE WARMING
… proxies, and their shell microstruc-ture, biomineralization processes, and geochemistry are intensively studied to refine our ability to in-fer past climatic and environmental changes from their shell, in order to understand and manage cur-rent climatic changes. In this perspective, …
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Coral biomineralization, climate proxies and the sensitivity of coral reefs to CO₂-driven climate
… carbonate (CaCO₃) skeletons. Key to the coral biomineralization process is the active elevation of the CO₃²⁻ concentration of the calcifying fluid to achieve rapid nucleation and growth of CaCO3 crystals. Coral skeletons contain valuable records of past climate variability and contribute to the …
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Coral biomineralization, climate proxies and the sensitivity of coral reefs to CO2-driven climate change
… carbonate (CaCO3) skeletons. Key to the coral biomineralization process is the active elevation of the CO2−3 concentration of the calcifying fluid to achieve rapid nucleation and growth of CaCO3 crystals. Coral skeletons contain valuable records of past climate variability and contribute to the …
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Calcium carbonate biomineralization: A theoretical and experimental investigation of biomolecular controls on nucleation and growth
Organisms have evolved a remarkable ability to mineralize complex skeletons and functional biomaterials. These structures are nucleated and grown in close associaiton with macromolecular assemblages of proteins and polysaccharides that are implicated in regulating all stagees of mineralization. …
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Nanoscale Effects of Strontium on Calcite Growth: A Baseline for Understanding Biomineralization in the Absence of Vital Effects
This study uses in situ atomic force microscopy (AFM) to directly observe the atomic scale effects of Sr on the monomolecular layer growth of abiotic calcite. These insights are coupled with quantitative measurements of the kinetics and thermodynamics of growth to determine the direction-specific …
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Hydrozincite bioprecipitation: a promising tool for bioremediation of waters contaminated by harmful metals. Hydrochemical factors and morphological features of the biomineralization process
… on environmental conditions that promote the biomineralization process is fundamental for the development of remediation strategies. This work aims to investigate the variables controlling the biomineralization process, and the hydrochemical factors that affect hydrozincite precipitation. …
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Biologically Controlled Mineralization and Demineralization of Amorphous Silica
… depth of this problem, as it pertains to biomineralization, is related to the small number of existing studies focused on the development of a mechanism-based understanding of intracellular mineralization processes. Molecular biologists and geneticists have only begun to turn their …
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The mineralogy and chemistry of modern shallow-water and deep-sea corals
… versus biological controls over coral skeleton biomineralization propose conflicting predictions about the fate of corals under OA. Rather than investigating the mechanism directly, I use a mineralogical approach to study the aragonite end-products of coral biomineralization.
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Bioactive Cellulose Nanocrystal Reinforced 3D Printable Poly(epsilon-caprolactone) Nanocomposite for Bone Tissue Engineering
… the mechanical properties and increase the biomineralization rate of PCL. To this end, an in vitro biomineralization study of both sulfuric acid hydrolyzed-CNCs (SH-CNCs) and surface oxidized-CNCs (SO-CNCs) has been performed in simulated body fluid in order to evaluate the bioactivity of …
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The mineralogy and chemistry of modern shallow-water and deep-sea corals
… versus biological controls over coral skeleton biomineralization propose conflicting predictions about the fate of corals under OA. Rather than investigating the mechanism directly, I use a mineralogical approach to study the aragonite end-products of coral biomineralization. I hypothesize that …
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