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 287 for “"Stabilising"”.
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Stabilising Semiconducting Polymers Using Solid State Molecular Additives
Solution processed organic semiconductors contain extrinsic environmental species that cause device instabilities as they are difficult to remove during low temperature processing and are able to penetrate into organic electronics after fabrication. This dissertation is centered on the search for …
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Circular dry cement inclusions: a novel approach to stabilising clay soil
Limited adoption of research and development has led to Britain lagging behind many European and far-east countries in terms of geotechnical on-site innovations. This, coupled with the fact that construction costs are considered to be 30% higher than they should be for what is delivered (Egan, …
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Sizing hybrid green hydrogen energy generation and storage systems (HGHES) to enable an increase in renewable penetration for stabilising the grid.
A problem that has become apparently growing in the deployment of renewable energy systems is the power grids inability to accept the forecasted growth in renewable energy generation integration. To support forecasted growth in renewable generation integration, it is now recognised that Energy …
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Potassium acetate treatment as a potential means for stabilising extra sensitive, halloysite-rich soils in the Bay of Plenty, New Zealand — A novel approach to an old issue
Landslides are a rapid, destructive natural hazard that pose a significant risk to human life and infrastructure. Globally and in New Zealand, landslides are among the most significant hazards. Within New Zealand, it is estimated that the annual costs associated with landslides are between …
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An investigation into polymeric excipient-drug compatibility in solid-liquid formulations
… way of selecting an appropriate polymeric stabilising agent that would effectively maintain good dispersibility of a given drug substance with known physico-chemical properties. This was achieved by quantifying the adsorption of different polymers onto a range of drug substances from …
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The structure and function of the human ghrelin receptor
… GPCRs, with interactions between the two helices stabilising the ground state. During activation conformational rearrangements result in these interactions being broken, with new contacts forming and stabilising the active state. Investigation of the ghrelin-R constitutive activity gives an …
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The role of stable nitroxyl radical precursors as antioxidants in polyolefins
… onto the polymer backbone. Comparison of photostabilising activity of the fully extracted bound antioxidants to those of the corresponding unbound analogous showed lower results for the former. However, thermal stabilising activity of the bound antioxidants was higher than that of the unbound …
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Human social groups: A cybernetic account of stability and instability
… and 'level of activity' as the objects of any stabilising process. The hypotheses were tested by laboratory experiment, by longtidudinal, participant-observer studies of natural groups, and by a computer simulation (GROUP-1) that mapped assumptions onto historical data. It was found that when …
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Effect of Transition Metal Compounds on the UV Degradation of Polymers
… evidence to suggest that the first step in the stabilising mechanism is the attack of hydroperoxide on a Ni(OX)molecule giving rise to O-hydroxyacetophenone and salicylic acid as the major oxidation products. An attempt was made to correlate the results obtained on the above solution studies …
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Active Suppression ofAerofoil Flutter via Neural-Network-Based Adaptive Nonlinear Optimal Control
… essential elements, require a separate initial stabilising control law for the overall system, an additional stabilising tuning loop for the actor NN, or an additional stabilising term in the critic NN tuning law, to guarantee the closed-loop stability for unstable and marginally stable systems. …
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Reactive processing of polyolefins using antioxidant systems
… Although the 'bound' AO's containing a UV stabilising function showed lower overall stabilisation effect than the unbound analogues before extraction, they were still much more effective when subjected to exhaustive solvent extraction. Furthermore, a very effective synergistic stabilising …
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Weight selection in robust control : an optimisation approach
… subject to the existence of an internally stabilising controller that guarantees robust performance with respect to these maximised weights. Thus, performance weights and a robustly stabilising controller are simultaneously synthesised by one algorithm in a systematic way. Two solution …
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The Chemical and Mechanical Properties of Thiol Modified ABS
… (1%) with unstabilised ABS and their stabilising properties followed by the above techniques. The adducts were effective thermal and photo-oxidative stabilisers and their effectiveness was not substantially reduced by solvent extraction of the polymer. The presence of bound stabilisers …
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Exploring genetic interactions with G-quadruplex structures
… with either PDS or PhenDC3, two independent G4-stabilising small molecules. I explored gene deficiencies that enhance cell death (sensitisation) or provide a growth advantage (resistance) in the presence of these G4-ligands. Additionally, I present a validation screen, comprising hits uncovered …
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Insight into Nucleation Kinetics of Flufenamic Acid Cocrystal Formulation in Solution: Investigating the Role of Polymeric Excipients through Combined Experimental and Computational Approaches
… mechanisms and the influence of polymers in stabilising supersaturated cocrystal solutions. The methodology integrates induction time measurements (Crystal16), solution-state Nuclear Magnetic Resonance (NMR), high-performance liquid chromatography (HPLC), molecular dynamics (MD) simulations, …
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The Effects of the Molecular Weight and the Environment of Antioxidants on their Efficiency
… low mobility do not necessarily preclude useful stabilising efficiency. Furthermore, indications are obtained that high compatibility may be detriments1 to the efficiency of an antioxidant. A sensitive technique is introduced for assessing the progress of oxidation reactions in a polymer and the …
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UV stabilisation of poly(ethylene terephthalate)
… of time compared to non-polymerisable UV stabilising additives. The polymerisable UV stabilisers for PET were synthesised using cyanuric chloride as a synthetic starting point. A number of synthetic monomers were prepared based upon one of the most effective UV stabilising additives …
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