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 29 for “"Discolouration"”.
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Pink discolouration in cheese
Pink discoloration defect impacts on a wide range of ripened cheese varieties, including Swiss, Cheddar, and Italian-type cheeses. The problem manifests either near the surface of the cheese block as a uniform pink border, or is distributed sporadically within the cheese block. The pink colour …
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The role of blanket peat moorland management in the generation and amelioration of discolouration of surface water supplies
Discolouration of surface waters in upland catchments (with associated costs of water treatment and resources) has increased particularly since the severe droughts in the 1970s and mid 1990s. Such discolouration is a major concern for many water companies whose catchment areas include upland …
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Iron and manganese accumulation potential in water distribution networks
… to receive customer complaints related to water discolouration. Currently, most water companies identify high-discolouration-risk regions in WDNs by either selecting areas in the network with high concentrations of Fe and Mn from their routine sampling, or using data obtained from customer …
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Ocular Compatibility of Hydrogels
… spoilation, discrete elevated deposits, lens discolouration, and lens surface coatings and plaques were examined...
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Influence of a bleaching agent on stained direct composite resins
… their physical and mechanical properties, discolouration, either intrinsic or extrinsic still remains a major drawback and is one of the main reasons for the replacement of these restorations. Toothbrushing and polishing procedures have been attempted to eliminate extrinsic staining without …
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Dairy-Met: compositional metagenomic analysis of milk and cheeses
… commercially produced cheeses which encounter a discolouration defect, as well as to study genomic changes in microbes associated with dairy foods. Through the application of these state-of-the-art technologies we identified the presence of microorganisms not previously associated with dairy …
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Investigation of the oxidative degradation mechanisms and melt stabilisation of a new generation metallocene polytehylene
… highest extent of melt stability and the least discolouration during processing (260°C/1 OOrpm). Furthermore, synergistic combinations of Irganox HP I 36/Ultranox 626 (XP-60) system produced very high levels of melt and colour stability (comparable to the Vitamin E based systems) in the mLLDPE …
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Colour changes in nano-filled and micro-hybrid composite resins on exposure to spices.
… resins; with turmeric causing the most severe discolouration regardless of the type of composite resin or finishing technique employed. The result of this study also suggests that different materials respond differently to staining by spices when either finished with mylar strips or polished …
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Organosilicon compounds as potential wood protecting agents
… inducing changes to the wood, like i.e. surface discolouration, dimensional changes or even wood rot, which are not appreciated by end-users. Therefore wood constructors are looking for protection methods of wood, leading to longer service life of their wood products. Since pressure is put on …
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Degradation of the beta-alumina electrolyte in a zebra cell
… possible failure modes. After cycling little discolouration, or impurity pickup was found to have occurred in the electrolyte. The forms of degradation of the beta-alumina electrolyte identified appeared to be a result of inherent flaws in the beta-alumina electrolyte tube, problems due to …
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Degradation of the beta-alumina electrolyte in a zebra cell
… possible failure modes. After cycling little discolouration, or impurity pickup was found to have occurred in the electrolyte. The forms of degradation of the beta-alumina electrolyte identified appeared to be a result of inherent flaws in the betaalumina electrolyte tube, problems due to …
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Evaluation of the stress ralaxation technique for measuring softening kinetics in aluminium alloys
… be devoid of any streaking or inhomogeneous discolouration. The cause of possible streaking effects can be related to poor microstructure development during TMP and often arises as a result of inadequate recrystallisation. To avoid the deleterious effects, it is important to implement the …
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The biology of marine myxosporida and an investigation into the effects of these parasites on teleosts
… gall bladder wall, increased bile viscosity and discolouration. Incidence, periodicity and severity of various Myxosporidian infections are discussed with regard to their disease potential and possible impact on commercially-important teleost species.
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A Study of the Factors Affecting the Deteioration of Old Paint Media
… during ageing which is the reason for the discolouration associated with this pigment. Vermilion on the other hand is an effective sensitiser for photo-oxidation due to the formation of hydroperoxides. The probable intervention of singlet oxygen and hydrogen peroxide via radical …
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EXTERNAL CLADDING DEFECTS AND PROPOSED ROBOTIC INSPECTION SYSTEMS
… buildings such as cracking, water penetration, discolouration, and debonding. Causes of such defects are discussed together with suggestions for proper detailing, workmanship and repair methods to minimise and correct these defects. A review of various non-destructive inspection techniques …
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A Multi-methods Approach to Build Evidence-Based Practice for Using Silver Diamine Fluoride for Managing Carious Lesions in Children
… Professional participants believed that this discolouration may concern some parents fearing that the black appearance may instigate bullying at school or that others may judge parents as neglecting their child’s oral health. They also thought that education of clinicians about SDF use and …
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Reducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality?
… shelf-life by increasing lipid oxidation and discolouration in fresh beef patties stored in modified atmosphere packs (80% O2:20% CO2). The inclusion of up to 80% DCP improved the FA profile of beef by increasing the percentage of CLA and PUFA in beef without compromising the oxidative …
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Computer graphics simulation of organic and inorganic optical and morphological appearance changes.
… effects, fixation of hypostasis and the purple discolouration due to oxygen loss in blood. The mummification method is able to reproduce volume shrinkage effects caused by moisture loss, skin wrinkling and skin darkening that are comparable to real mummies.
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Examination of the forensic engineering techniques employed on fire-damaged concrete structures
… to a certain temperature, usually below 600°C. Discolouration in heated concrete sections were visualised using simple digital photography. Changing the cement composition influenced the rate of carbon ingress into the concrete matrix, however this did not result in any significant colour change …
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Biological growth on rendered façades
… many of these constructions have experienced discolourations from growth of algae and moulds on the façades already a few years after construction. It has not always been possible to explain this discolouration. Sometimes one part of the façade had discolorations and another part of the same …
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