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 55 for “"Degradation mechanism"”.
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NEW FINDINGS INTO TARGET-DIRECTED MICRORNA DEGRADATION MECHANISM
… by interacting with target RNAs. A novel mechanism in control of miRNA levels, called Target-Directed miRNA degradation (TDMD), has been described, which involves specific transcripts able to interact with miRNAs and induce miRNA degradation. We showed that an endogenous RNA transcript, …
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Investigating Cathode–Electrolyte Interfacial Degradation Mechanism to Enhance the Performance of Rechargeable Aqueous Batteries
… electrolytes and associated electrode failure mechanism, as the key factors that govern cell performance, are of vital importance yet not fully understood. Owing to the high-temperature calcination synthesis, most electrode materials are intrinsically moisture-free and sensitive to the …
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Kinetic and Mass Transfer of Peroxone Oxidation of Toluene Using Ultra Sonic Spray: Ab Initio Quantum Calculations and Numerical Modeling
… technique to treat waste gas or wastewater. Degradation of ozone in water is a key step in the pollutant degradation mechanism, particularly in peroxone oxidation. However, the degradation of ozone in water is not well understood. In the research documented here, peroxone treatment is studied …
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A Study of the Role of Hydroperoxides in the Degradation and Stabilisation of Polymers
The photo-degradation mechanism of polyethylene was studied by means of functional group analysis using infrared spectroscopy. The rates of appearance and disappearance of key functional groups such as hydroperoxide, carbonyl, vinylidene, and vinyl formed during the photooxidation of the polymer …
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Chemical and physical aspects of wear processes in polymers
… mild steel and oxides present on mild steel. The degradation characteristics of P. V. C. and C1d P. V. C. have been correlated in terms of current mechano-chemical comminution theory and the process causing the wear of P. V. C., C1d P. V. C., P. T. F. E. and P. C. T. F. E. described in relation to …
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Identification, isolation and bioactivity assessment of a bioactive peptide QUB-1465 from the skin secretion of Hylarana guentheri
… as AMPs kill microorganisms through a membrane degradation mechanism, as described in the “barrel-stave-pore model”, the “toroidal-pore model” and the “carpet-like model”. In this research, a single cDNA sequence encoding a bioactive peptide QUB-1465 was cloned from a cDNA library constructed …
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Self-amplifying degradable polyurethanes and their upcycling application
… as base-triggered small molecules with amplified degradation properties. Chapter 2 investigates the synthesis as well as degradation of a novel base-triggered self-amplifying degradable polyurethane formed from an Fmoc derivative triol or Fmoc diol monomer. Firstly, Fmoc derivative diol monomer …
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Stability of double perovskite cathodes under high humidity for solid oxide fuel cells
… environment to uncover their performance and degradation mechanism. First, powders of electrode materials were analyzed for any degradation before and after long-term moisture exposure using XRD to probe the bulk and Raman Spectroscopy to probe the surface. SEM was also used to characterize …
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Investigation of Chloride-induced Stress Corrosion Cracking for Long-Term Storage of Spent Nuclear Fuel in Dry Storage Systems
… cracking (CISCC) has been identified as the main degradation mechanism for spent nuclear fuel dry storage canisters. This type of induced cracking is complex and depends on several factors, such as material composition, exposure temperature, relative humidity, applied tensile stress, and …
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Investigating the application of frequency response analysis for diagnosing tap changer on power transformer
… transformer, it is particularly vulnerable to degradation mechanism. Many diagnosis tools have been developed to evaluate the mechanical integrity of tap contacts since many years ago. However, studies related tap changer diagnosis using FRA is still lacking. This thesis adapts, frequency …
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A probabilistic fracture mechanics model for the tubing degradation of the Koeberg steam generators
… to determining the exact nature of this degradation phenomenon and to predicting its consequences. Whereas, the study of the nature of this degradation mechanism has led to many conflicting conclusions, the predictive methods developed have been more successful. Initially, the …
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Excitonics for Organic Electronics
… a simple model for singlet exciton driven degradation in OLEDs in presented. This model accounts for the time and current density dependence of the host and defect emission in degrading OLEDs and is thoroughly validated using new experimental data, as well as literature data from leading …
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Electrochemical to mechanical energy conversion
… this has often been looked upon negatively as a degradation mechanism. However, the crystallographic strains are large enough to warrant investigation for use as actuators. Lithium battery electrode materials lend themselves to two separate types of actuators. On one hand, intercalation oxides …
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Physics of electrical degradation in GaN high electron mobility transistors
… physical understanding of the fundamental degradation mechanisms. In this thesis, we investigate the physical mechanisms behind the electrical degradation of GaN HEMTs by performing systematic stress experiments on devices provided by our industrial collaborators. These devices are …
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Smart control architecture for microgrid application
… the billing cost for power incorporating battery degradation mechanism.</p> <p>Three works are discussed in this research that discusses methodologies to improve the operation of a three phase grid connected inverters. The first work discusses a globally stable estimation architecture for …
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Catalytic Degradation of Waste Polymers
… readily into their monomer units. Thermal degradation of polymers usually follows a radical mechanism (which is of high energy and requires high temperatures) and produces a large proportion of straight chain alkanes, which have low relative octane number (RON) and so cannot be used in …
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Power plant degradation : a modular secondary plant and integral flow accelerated corrosion model
… Corrosion (FAC) is the most prevalent material degradation mechanism for low carbon steel in steam-water flow systems. The band of uncertainty in predictions of wear rate due to FAC spans one to two orders of magnitude. Such a wide range of uncertainty inhibits the ability to devise safe and …
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Degradation Analysis for Heterogeneous Data Using Mixture Model
… about reliability of the products. If a degradation measure that is closely related to failure can be monitored, degradation analysis, as an alternative to the failure time analysis, may lead to improved reliability inference and provide additional information related to the failure …
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Integrating Cell-level Kinetic Modeling into the Optimization of Cancer Therapeutics
… Many targeted receptor systems also constitute a degradation mechanism for the drug via endocytosis and a thorough understanding of the complex interplay between the drug's pharmacokinetics and its effect, is largely missing. For complex diseases such as cancer, systems biology models of …
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Structural studies of HIV-1 Vif and its SOCS-box domain
… factor (Vif) can induce a poly-ubiquitination degradation of APOBEC3G to counteract the immune response by forming an E3 ubiquitin complex composed of cellular proteins Elongin B (EloB), Elongin C (EloC), Cullin 5 and Ring-Box protein. In this project, we solved the first structure for the Vif …
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