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 104 for “"Depolymerization"”.
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Bimetallic Catalyst for Lignin Depolymerization
… the 1950’s, there have been reports of lignin depolymerization research to develop valorization technologies that convert lignin in energy, fuels, and chemicals through thermal and biological approached. Most of these technologies targeting chemical production have insufficient processing and …
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On the depolymerization of actin filaments
… based on cycles of polymerization (assembly) and depolymerization (disassembly) of actin filaments. Actin binds ATP and within the filament, actin-bound ATP is hydrolyzed into ADP on a time scale of a few minutes. As ADP-actin dissociates faster from the filament ends than ATP-actin, the filament …
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Reductive depolymerization of lignin into valuable products
L'abstract è presente nell'allegato / the abstract is in the attachment
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I. Depolymerization-macrocyclization of (o-phenylene-ethynylene)-alt-(arylene-ethynylene) copolymers II. Improving existing water filtration membranes via covalent modification
I. Depolymerization-Macrocyclization of (o-Phenylene-Ethynylene)-alt-(Arylene-Ethynylene) Copolymers The synthesis of shape-persistent arylene-ethynylene macrocycles via alkyne metathesis remains an open area of investigation due to gaps in understanding about how monomer structure affects product …
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Development and characterization of polyphthalaldehyde for transient applications
… transformation in properties that accompany the depolymerization of high molecular weight polymers into their monomeric components. Depolymerization of metastable polymers can be tailored by incorporating stimuli responsive agents that destabilize the host polymer in reaction to a variety of …
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Organization of Postsynaptic Proteins via the Neuronal Cytoskeleton
… or Triton X-100 to extract soluble proteins. Depolymerization of F-actin led to a decrease in both the number of synaptic NMDAR1 clusters and the number of GluR1-labeled spines. On GABAergic neurons, GluR1 clusters redistributed to non-synaptic sites, whereas on pyramidal neurons the clusters …
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Sacrificial polymers for rapid manufacturing of bioinspired vascular materials
… composites (FRPCs). Catalyst-assisted thermal depolymerization of poly(lactic acid) (PLA) templates containing an organometallic compound enables manufacturing of complex vasculature in thermosets and FRPCs for self-healing, thermal regulation, and electromagnetic reconfigurability …
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Specific ion effects on transient polymers: a new strategy for programmable microcapusles
… reactions, leading to controlled and complete depolymerization upon one cleavage. Taking advantage of the unique feature of triggered materials transience, this dissertation focuses on developing transient polymer microcapsules for programmable payload release. In Chapter 2, a rapid solvent …
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Modeling Solvent Extraction of Lignin from Hardwoods
… lignin. The model simulates delignification as depolymerization of lignin macromolecules into fragments small enough to be soluble. This process competes with intrachain condensation that consumes labile bridges without forming new fragments, and with recombination that forms larger chains and …
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Organometallic Polymerization Catalysts
… of which involved polymerization and the other depolymerization. It is likely that each stage was catalysed by a different vanadium complex. The decay in the rate of polymerization observed during the initial polymerization stage was correlated with a decrease in the rate of polymerization that …
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Advanced manufacturing of sustainable materials
… system capable of cycled polymerization and depolymerization utilizing an engineering thermoplastic with a low ceiling temperature, cyclic poly(phthalaldehyde) (cPPA). cPPA depolymerization proceeded under mild thermal conditions, and quantitative recovery of the monomer was possible. Direct …
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MOLECULAR MECHANISMS OF ACTIN FILAMENT ASSEMBLY AND TURNOVER
… it was typically thought that only capping or depolymerization can occur in the cell. However, three structures of muscle leiomodin-2 (Lmod2) inform a mechanism of pointed-end elongation. Lmod2 is observed priming the penultimate actin subunit for monomer addition, recruiting an actin monomer, …
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The Effects of the Deposition of Radioactive Strontium ( Sr85 + Sr89 ) on the Aorta of the Rat
… low as 5r. This sensitivity was attributed to a depolymerization of the mucopolysaccharides of the connective tissue in a review by Brinkman of both in vitro and in vivo studies. Changes in permeability in connective tissue membranes as a result of treatment with Ba140sO4 were also noted by …
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Bacterial interactions and enzyme kinetics in environmental polyester degradation
… polymer degradation products. The results show depolymerization was controlled by a bacterium that metabolized only one monomer component of the polymer, while downstream consumers were required to remove the other moieties of the polymer. Second, the influence of growth rate and substrate …
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A biochemical investigation of actin disassembly mechanisms
… the role of Aip1 alone in cofilin-mediated depolymerization of actin filaments. We showed that Aip1 is not an actin capping protein as was previously thought, however it can destabilize cofilin-saturated stable filaments and potentiate cofilin’s severing and depolymerization activity. During …
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Kinetic Studies of Model Reactions to Transform Biomass into Fuels
… requires detailed understanding of the thermal depolymerization and catalytic hydrodeoxygenation reactions to optimize the overall process. This dissertation describes the experimental work using model compounds to elucidate the role of bimetallic catalyst and control the reaction operating …
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Molecular mechanisms of kinetochore microtubule attachment
… that undergo dramatic structural changes during depolymerization. The results presented in this thesis define essential functions of the Astrin-SKAP-LC8 and Skal complexes at the kinetochore-microtubule interface. First, we demonstrate that the Astrin-SKAP-LC8 complex localizes preferentially to …
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Kinetic Studies of Model Reactions to Transform Biomass into Fuels
… requires detailed understanding of the thermal depolymerization and catalytic hydrodeoxygenation reactions to optimize the overall process. This dissertation describes the experimental work using model compounds to elucidate the role of bimetallic catalyst and control the reaction operating …
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Engineering characterization of the interaction of asphalt with crumb rubber modifier (CRM)
… discussed in the paper: particle swelling and depolymerization. Two types of interactions are considered: a short-term interaction that explains the property development mechanism and a long-term interaction where the property stabilizes. The effect of CRM properties on the developed properties …
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Implications for Microtubule Mediated Ethylene Effects in Pea Stem Sections
… mid colchicine. both known microtubule depolymerization agents, reverse the effects of ethylene in straight growth tests. Low temperature (6 C) also profoundly reduces the effects of the gas in terms of swelling, hook curvature, and horizontal nutation. Electron microscopy shows that …
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