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 16 of 16 for “"Biodegradable plastics"”.
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The Utilization of Activated Sludge Polyhydroxyalkanoates for the Production of Biodegradable Plastics
Sequencing batch reactor (SBR) systems were used for the development of a system and operating procedures for the high production of polyhydroxyalkanoates (PHAs) by wastewater treatment (activated sludge) bacterial cultures. It was found that unbalanced growth conditions stimulated massive PHA …
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Production of biofuels and biodegradable plastics from common waste substrates in engineered Ralstonia eutropha
… in the form of polyhydroxyalkanoates (PHAs), a biodegradable and biocompatible plastic. In this thesis, the native carbon storage system was genetically disabled and the carbons redirected to produce biofuels. Key enzymes involved in R. eutropha CO₂, oil, and branched-chain amino acid metabolism …
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The design, synthesis and properties of pressure-processable biodegradable block copolymers
In this thesis, biodegradable block copolyesters were specifically designed and synthesized for their susceptibility to pressure-induced mixing. These baroplastic materials are capable of being processed and molded through the application of pressure at temperatures far below those needed in …
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Functional Evolution and Origin of Enzymes of the Bacterial Glycogen/Starch Biosynthetic Pathway
… industrial applications include fertilizers, biodegradable plastics, adhesives, and alternative fuels. The impact of understanding the basic science of the regulation of this pathway may be seen in future manipulation of these enzymes to produce greater quality and quantity of starch.</p>
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Isolation of bacterial strains capable of efficient conversion of n-alkanes into value added products
… their cytoplasm, which is a good candidate for biodegradable plastics. The gene that catalyzes PHA polymerization, phaC, was detected using PCR in some of the environmental strains. The strains of interest were identified and characterized biochemically using various techniques and later …
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Polymeric materials for neovascularization
… of polymeric systems, including hydrogels and biodegradable plastics, to deliver proangiogenic factors in a sophisticated manner to maintain a sustained proangiogenic environment. Despite some impressive results in rebuilding vascular networks, it is still a challenging task to engineer mature …
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Fundamental Studies of Various Poly(L-lactide)/clay Nanocomposite Systems by in-situ Polymerization
Biodegradable plastics are a promising solution to the increasing global concern of persistent plastic wastes on the environment. In order for biodegradable polymers to successfully compete with commodity polymers, mechanical, thermal, and gas barrier properties must be improved. This can be …
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The bacterial synthesis and characterisation of polyhydroxyalkanoates using waste plastics as carbon sources for novel applications
… group of biocompatible, environmentally neutral, biodegradable plastics that can be produced by bacteria. The structure of PHAs can be adapted for a wide range of applications, including biomaterials, 3D printing filaments, packaging and general household items. Some of the factors limiting the …
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Tools for decoding the structure-function relationships of biopolymers in nanotechnology and glycobiology
… the structure-function relationship of synthetic biodegradable plastics that are at the forefront of nanotechnology for spatiotemporally-regulated targeting and sustained release of drugs to treat Cancer and other chronic diseases. A Voxel-based 3-D platform for accurately simulating all phases of …
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Dual biopolymer production and separation from cultures of Bacillus spp.
In the search of alternative new materials for biodegradable plastics, biopolymers provide attractive solutions with their vast range of applications. A challenge in industrial production of biopolymers is their high cost, and one approach to minimise the cost is expanding the number of valuable …
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Producción de gas de síntesis a partir de pirólisis de residuos inducida por microondas para su utilización en la obtención de bioplásticos
… de alto valor como, por ejemplo, plásticos biodegradables. Una de las posibilidades consiste en combinar la gasificación de los residuos para producir moléculas sencillas (principalmente H2 y CO, más conocido como syngas) con la fermentación de dicho gas para producir bioplásticos. El …
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Estudio de prefactibilidad para la instalación de una planta productora de bolsas biodegradables a partir de ácido poliláctico
The pollution is caused by the excessive use of plastics which, when discarded, accumulate both at sea and on land. Our country generates 6. 8 million tons solid wastes per year, of which 11% are plastics, among which are the bags that consume about 3 billion units per year. Due to this situation, …
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Dissolution and Biokinetics of PCL in Denitrification Systems
… the potential of polycaprolactone (PCL), a biodegradable polymer, as a sustainable solid-phase carbon source for wastewater denitrification. Laboratory experiments examined the effects of temperature, bead mass, solvent type, hydraulic retention time, and bead reuse on PCL dissolution and …