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 15 of 15 for “"Polyethylene Glycols"”.
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Melt agglomeration with hydrophobic meltable binders in high shear mixer
… mixer using hydrophilic meltable binders such as polyethylene glycols, the findings are not fully applicable to hydrophobic meltable binders due to varying physicochemical properties of the latter than those of the former. The agglomerative capabilities of hydrophobic meltable binders remain not …
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Synthesis and Characterization of Anhydrous Proton Conducting Polymer Electrolytes for Fuel Cell Applications
… of polymer electrolytes based on polyethylene glycols (MePEGn) changing the chemical structures and other physical properties (Volume fraction of PEG, Free volume, Glass transition temperature, Viscosity) to approach for practical applications. Changing the chemical structure of …
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Zur rhodiumkatalysierten Hydroformylierung von Octenen : neue Ligand- und Lösungsmittelkonzepte
… solvent systems and ligands based on polyethylene glycols. The synthesis of monocyclic phosphites and their use in the hydroformylation of octenes allowed conclusions on the influence of the ligand backbone on activity and selectivity. Concerning temperature-dependent multi-component …
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Piezo-optical study of the behaviour of short chain liquid polymers
… and polyisobutenes, and with chain segments for polyethylene glycols and polypropylene glycols, consistent with the freezing behaviour. The n-alkane data may be interpreted as showing some degree of molecular ordering above 150 MPa, analogous to the thermal observations of a mesomorphic liquid …
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Polyethylene glycol stationary phases for capillary gas chromatography
… nonsilicone phases are the high molecular weight polyethylene glycols (HMW PEG) which are commercially available in a wide range of molecular weights, cross-linkable and uncross-linkable (Carbowax 2OM and 4OM, the Superox series, etc.). Their most outstanding features are their unique polarity and …
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Reconstituted collagen fibres for tissue engineering applications
… sodium chloride, different molecular weight of polyethylene glycols and poly vinyl alcohols at 37°C, where fibrillogenesis occurred. After 15 minutes incubation, the fibres were washed and air-dried under the tension of their own weight. In addition, an extensive study of the effects of a wide …
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Enantioseparation using a counter-current bioreactor
… and DAAO were measured in a range of phases with polyethylene glycols (PEGs) of different molecular weights, different salts, and different compositions of PEG and salt, using an automated robotic method, developed for the purpose. A system of 14% w/w PEG 1000/ 14% w/w potassium phosphate, pH 7.6, …
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Structure-property relationships in polyurethanes from lignin
… involving incorporation of soft segments, four polyethylene glycols were used. No soft segment phase in the network was detectable by differential scanning calorimetry or dynamic mechanical analysis. The glass transition temperature of lignin phase dropped by as much as 70°C for HDI and 115°C …
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Impact of modified carbon dioxide mobile phases on detection on packed-column supercritical fluid chromatography
… optimized conditions, the separations of polyethylene glycols and ginkgo biloba leak extract are reported.
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Protection Mechanisms of Excipients on Lactate Dehydrogenase during Freeze-Thawing and Lyophilization
… the cryoprotection of labile proteins by the polyethylene glycols (PEG's). They assume that the hydration shell around a labile protein remains in tact during freezing, as in solution. But freezing is a separation process, that extracts much of the water into a crystalline ice matrix that is …
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The Impact of Lipid Nanoparticle Chemistry on RNA Delivery and Therapeutic Outcomes
This dissertation aims to understand how two individual components of the traditional four-component lipid nanoparticle system, the PEG lipid component and the ionizable cationic lipid component, impact RNA delivery. To systematically investigate how PEG lipid chemistry impacted LNP formulation and …
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Biocompatible polymeric nanoparticles for drug/DNA delivery using biologically friendly polymerisation processes
This thesis explores the synthesis of several different polymeric nanostructures using reversible addition-fragmentation chain transfer (RAFT) polymerisation in both aqueous and ethanolic solutions.<br/><br/>A preface entailing an abstract, contents, common abbreviations and details of where this …