Dissertations / Theses on the topic 'Fouling interaction'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 20 dissertations / theses for your research on the topic 'Fouling interaction.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Magens, Ole Mathis. "Mitigating fouling of heat exchangers with fluoropolymer coatings." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/287467.
Full textPerry, Jeffrey L. "Fouling in silicon microchannel designs used for IC chip cooling and its mitigation /." Online version of thesis, 2008. http://hdl.handle.net/1850/6211.
Full textKargar, Mehdi. "Controlling Microbial Colonization and Biofilm Formation Using Topographical Cues." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/71741.
Full textPh. D.
Case, Rebecca Biotechnology & Biomolecular Sciences Faculty of Science UNSW. "Molecular- and culturebased approaches to unraveling the chemical cross-talk between Delisea pulchra and Ruegeria strain R11." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/30394.
Full textSmith, Diane Elizabeth. "Adhesion of Mycobacteria: Capture, Fouling, Aggregation." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542537888485749.
Full textFernandez-Gonzalez, Victoria. "Fouling amphipods on marine aquaculture facilities: ecological interactions and potential applications and potential applications." Doctoral thesis, Universidad de Alicante, 2017. http://hdl.handle.net/10045/89091.
Full textLas estructuras artificiales que conforman las instalaciones de acuicultura en mar abierto suelen ser colonizadas por multitud de organismos marinos, que forman comunidades de fouling características en estas estructuras. Muchos estudios se han centrado en la descripción de los organismos sésiles que se desarrollan sobre cabos, redes y boyas de las instalaciones de acuicultura, debido a los problemas que generan para el cultivo y los costes adicionales que significan para la industria derivados de su necesaria eliminación. Sin embargo, aunque las comunidades de fouling sésiles han sido bien estudiadas desde el punto de vista de su control en las instalaciones de acuicultura, poco se sabe sobre la epifauna que habita estas estructuras artificiales. Esta tesis se centra en el estudio de los crustáceos anfípodos, los cuales aún no han sido estudiados en cuanto a la composición de especies y a su relación con los hábitats creados por los organismos sésiles, a pesar de haber sido detectados en grandes abundancias en las instalaciones de acuicultura. Después de una introducción general, que establece el marco de estudio, el capítulo uno es un estudio preliminar sobre las comunidades de fouling de las instalaciones de acuicultura en el Mediterráneo, comparándolas con las desarrolladas en otras estructuras artificiales como puertos o plataformas petrolíferas. En este capítulo, se demuestra que las comunidades de fouling están compuestas principalmente por bivalvos, algas, hidrozoos y briozoos y que más de un 80% de la fauna asociada a estos organismos son anfípodos. Además el poblamiento se caracteriza por la presencia de siete especies de anfípodos que son frecuentes y abundantes: Elasmopus rapax, Jassa marmorata, Jassa slatteryi, Ericthonius punctatus, Stenothoe tergestina, Caprella equilibra y Caprella dilatata. Un estudio cuantitativo de las densidades de estos anfípodos se lleva a cabo en el capítulo 2, donde se encuentra que la densidad media es de 176.000 ind.m-2, con máximos de más de 1.000.000 ind.m-2. Allí se explora también el papel de los macro y microhábitats en mantener dichas poblaciones de anfípodos. El efecto de la modificación de corrientes sobre las comunidades plantónicas debida a la instalación de las piscifactorías se analiza en el capítulo 3. En él, se detectó una retención de los anfípodos planctónicos cerca de las instalaciones, evidenciada por el incremento en las abundancias de hipéridos y de anfípodos migradores desde diferentes hábitats bentónicos flotantes. La influencia de las grandes densidades de anfípodos del fouling sobre otros hábitats se estudia en los capítulos 4 y 5, donde se observó que el fouling actúa como fuente de anfípodos migradores, exportando individuos que colonizan tanto sedimentos defaunados en el fondo marino como otros hábitats flotantes cercanos. Finalmente, en el último capítulo se analiza la posibilidad de aprovechar la producción natural y la conectividad observadas a través del cultivo de anfípodos como parte de un sistema de acuicultura multitrófica integrada (AMTI) en mar abierto con peces como especie principal. A lo largo de esta tesis, se demuestra que la acuicultura influencia las poblaciones de anfípodos marinos, tanto en el establecimiento de grandes densidades de población como en la conectividad entre las diferentes subpoblaciones. Como resultado, surge una nueva aplicación comercial de la posibilidad de usar los anfípodos del fouling como biofiltros, reciclando los residuos de la acuicultura dentro de un sistema de acuicultura multitrófica, garantizando así un desarrollo más sostenible de la acuicultura en el medio marino.
Jenkins, Maggie F. "Indirect Food Web Interactions: Sea Otter Predation Linked to Invasion Success in a Marine Fouling Community." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/2000.
Full textAl-Zebari, Nawar. "Production and characterisation of self-crosslinked chitosan-carrageenan polyelectrolyte complexes." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267918.
Full textJin, J. "Lipid foulant interactions during the chromatographic purification of virus-like particles from Saccharomyces cerevisiae." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1302065/.
Full textShen, Mingchao. "Monocyte/macrophage and protein interactions with non-fouling plasma polymerized tetraglyme and chemically modified polystyrene surfaces : in vitro and in vivo studies /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8013.
Full textDelrue, Florian. "Modélisation du procédé bioréacteur à membranes immergées : calage et validation du modèle ASM1 sur un site réel : étude des interactions boues activées, conditions opératoires et membrane." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13760/document.
Full textMembrane bioreactors (MBRs) are becoming increasingly popular for the treatment of municipal wastewater especially when land is limited or when the treatment requirements are high. Nevertheless, the operation of these plants and in particular the fouling of the membrane are still difficult to manage for the operators. Modelling is an efficient tool, which has already been successfully used on conventional activated sludge processes, for the operation and the understanding of the process using Activated Sludge Models (ASM). Biological treatment and membranes filtration capacity (fouling) are two aspects that can be modeled on MBRs. In this work, three full-scale plants were investigated and one of them was chosen for the ASM1 calibration. The usual methodology was adapted to the MBR specificities and to the modeled wastewater treatment plant in particular (wastewater fractionation, oxygen calibration) and a new set of ASM1 parameters was estimated. The influence of the sludge properties and the operating conditions on the membrane filtration capacity is still the subject of numerous studies, generally on pilot-scale MBRs, and modelling is in its early stages. The objective of this work regarding membrane filtration was to characterize the “membrane/sludge” system by studying the interactions between the sludge properties, the operating conditions and the filtration parameters (membrane permeability and fouling rate) and to compare them with the results from the literature. The two studied MBRs showed quite different behaviors and correlations between parameters, validating the statement that the interactions between membranes, sludge and operating conditions are very complex
Hsu, Chao-Hsiang, and 許朝翔. "Isothermal Titration Calorimetric Studies of the Non-fouling Interaction Mechanism Between Proteins and Polyethyleneglycol." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/32915936669573110926.
Full text國立中央大學
化學工程與材料工程研究所
95
The characteristics of preventing nonspecific adsorption of protein has lead to extensive usage of PEG and its derivatives for biomedical applications. We consider that the interaction of water with the PEG is a major determinant of preventing protein adsorption. However, the thermodynamics aspect of the mechanism has not been well addressed. Therefore, in this study, we described the hydration behavior of PEG by measuring the dilution heat of PEG with various salt concentration, types of salt ions, temperature and molecular weight of PEG. In addition, we measured the isotherms and the interaction enthalpy between protein and Ether-650S with various salt concentrations, salt types and temperature by batch isotherms and ITC. From the results of dilution heat, we observed that all the dilution heat are exothermic at all condition (i.e. salt conc. and types, temperature, PEG MW). It indicated that the PEG molecule is prefer to hydrate with water than aggregation in the conditions investigated. At high salt concentration, temperature and molecular weight of PEG, the dilution heat of PEG is less exothermic due to the poor hydration of PEG. In thermodynamics, the dilution of PEG is more energy unfavorable at high salt concentration, temperature and molecular weight of PEG. And the extent of salt ions which affect the hydration of PEG is consistent with the Hofmeister series. Besides, we also observed that all the values of Flory-Huggins parameter(χ) are negative at each condition. It also indicated that all the solvent which we used are good solvent for PEG. From the results of isotherm, the amount of lysozyme adsorb on Ether-650 will decrease with increase the salt concentration. We considered that both of hydrophobic and electrostatic interaction affect the binding affinity of lysozyme. The enthalpy of lysozyme adsorbed on Ether-650S are almost endothermic. It indicated that the hydrophobic force is the driving force during the adsorption process. However, the enthalpy of adsorption is exothermic at 1M KCl. This lead to the suggestion that the adsorption of lysozyme with the Ether-650 is of the “nonclassical” hydrophobic type interaction at 1M KCl. In this study, we also calculated the number of water molecules released during the adsorption by preferential interaction model. From the results of P.I Model, we can conclude : (1) when we adding ammonium chloride to the solution, the system released more water molecules than add that of potassium chloride during the binding process.(2)compare with literature data, PEG ligand have stronger capability of hydration than other hydrophobic ligands.
RAMOS, GONCALVES VERA LUCIA. "Interactions between two invasive alien species, Procambarus clarkii and Dreissena polymorpha, in the aquatic ecosystems of central Italy." Doctoral thesis, 2014. http://hdl.handle.net/2158/854698.
Full textPophali, Ameya. "Interaction between a Supersonic Jet and Tubes in Kraft Recovery Boilers." Thesis, 2011. http://hdl.handle.net/1807/31903.
Full textLin, Nien-Jung, and 林念蓉. "Surface Self-assembled PEGylation coated onto PVDF Microfiltration Membranes for Ultra-Stable Bio-fouling Resistance in Wastewater Treatment Application and Interaction Force analysis." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28167979297612214991.
Full text中原大學
化學工程研究所
101
A systematic group of hyper-brush PEGylated diblock copolymers containing poly(ethylene glycol) methacrylate (PEGMA) and polystyrene (PS) was synthesized using an atom transfer radical polymerization (ATRP) method and varying PEGMA lengths. This study demonstrates the anti-biofouling membrane surfaces by self-assembled anchoring PEGylated diblock copolymers of PS-b-PEGMA on the microporous polyvinylidene fluoride (PVDF) membrane. Two types of copolymers are used to modify the PVDF surface, one with different PS/PEGMA molar ratios in a range from 0.3 to 2.7 but the same PS molecular weights (MWs , ~5.7 kDa), the other with different copolymer MWs (~11.4, 19.9, and 34.1 kDa) but the similar PS/PEGMA ratio (~1.70.2). It was found that the adsorption capacities of diblock copolymers on PVDF membranes decreased as molar mass ratios of PS/PEGMA ratio reduced or molecular weights of PS-b-PEGMA increased because of steric hindrance. The increase in styrene content in copolymer enhanced the stability of polymer anchoring on the membrane, and the increase in PEGMA content enhanced the protein resistance of membranes. The optimum PS/PEGMA ratio was found to be in the range between 1.5 and 2.0 with copolymer MWs above 20.0 kDa for the ultra-stable resistance of protein adsorption on the PEGylated PVDF membranes. The PVDF membrane coated with such a diblock copolymer owned excellent biofouling resistance to proteins of BSA and Lysozyme as well as bacterium of E. coli and S. epidermidis, and high stable microfiltration operated with domestic wastewater solution in a membrane bioreactor. For the part of interaction force analysis, a molecular simulation method was used to investigate the interaction between organic foulants and fluoropolymeric membranes, such as humic acid (HA) and dextran interacted with PVDF, polytetrafluoroethylene (PTFE) and polyvinyl fluoride (PVF) materials. The result indicated the hydrophilicity with water molecules followed the order: PVF>PVDF>PTFE. The simulated trend was consistent with experimental data of contact angle. Forthurmore, the result of RDF analysis implied that PVF material had more irreversible fouling due to higher interaction of hydrogen-bond with dextran. PVDF material easily attracted with HA because of hydrophobic interaction through energy calculation. PTFE reveal the lowest surface energy to resist water and foulants adsorbed on surface. Finally, the PEGylated copolymer improved hydrophilicity of PVDF membranes to reduce the foulants adsorption because of interaction with water molecules.
(8986394), Yizhe Zhang. "INTERACTIONS AMONG PROTEINS AND CARBOHYDRATES UNDER THERMAL PROCESSING CONDITIONS AND THEIR EFFECTS ON DAIRY FOULING." Thesis, 2020.
Find full textIn dairy processing, dairy ingredients need to be thermally treated to ensure product quality and safety for an extended shelf life. During thermal processes, milk protein denatures and interacts with other dairy ingredients to form a layer of deposit on heated surfaces, known as fouling which can deteriorate process efficiency and product safety. Milk is a complex mixture of proteins, fats, carbohydrates, minerals and vitamins. The heat-sensitive B-lactoglobulin (B-lg) is known to be a key component in fouling formation (constituting 50% of type A fouling deposits) during milk pasteurization, as B-lg unfolds when heated and exposes the reactive sulfhydryl groups that can interact with other proteins and ingredients to form deposits. Although casein (80% of milk proteins) is known to interact with denatured B-lg, no fouling studies have been performed with particular focus on the effect of casein on whey protein fouling.
Carbohydrates are an ingredient widely added in various dairy products as sweetener, stabilizer, texturizer, and fat replacer. Simple sugars have a protective effect on whey protein denaturation, but their effect on dairy fouling is not known. Polysaccharides can interact with milk proteins through electrostatic and hydrophobic interactions, as well as hydrogen bonding. The addition of polysaccharide (carrageenan) has been reported to cause opposite effects on protein deposition, however, no conclusive mechanism has been proposed to elucidate how protein-polysaccharide interaction at pasteurization temperatures affects the fouling behavior of dairy products.
In this dissertation, different model dairy solutions and real dairy products were used to study the effect of composition, including protein distribution and additions of simple sugars and polysaccharides, on dairy fouling. Fouling deposits were formed and analyzed using a bench-top spinning disc apparatus operating under well-controlled temperatures and shear stresses characterized by computational fluid dynamics simulations. By studying the fouling behavior of camel milk and comparing with bovine milk, milk without B-lg was found to still foul and form deposits containing casein, α-lactalbumin, serum albumin with a reduced thermal resistance due to a more porous structure. Results also showed that the addition of 10 wt% sugar reduced whey protein fouling by more than 30% and affected the structure and adhesion strength of deposits. Furthermore, the presence of carrageenan in dairy solutions can promote the denaturation of B-lg when heated and form a more compact deposit, resulting in more severe fouling. Overall, this dissertation provides a fundamental understanding of the fouling characteristics of complex dairy products. The knowledge gained is expected to help the dairy industry select suitable ingredients to mitigate or prevent the fouling problem.
Medina, Sandra Constanza. "Understanding Submicron Foulants in Produced Water and their Interactions with Ceramic Materials." Diss., 2020. http://hdl.handle.net/10754/666260.
Full textContreras, Alison Eleanore. "Filtration of Complex Suspensions Using N anofiltration and Reverse Osmosis Membranes: Foulant-Foulant and FoulantMembrane Interactions." Thesis, 2011. http://hdl.handle.net/1911/64406.
Full textIgnagni, Nicholas. "Engineering Applications of Surface Plasmon Resonance: Protein–Protein and Protein–Molecule Interactions." Thesis, 2011. http://hdl.handle.net/10012/6294.
Full text"Coupling a dynamically updating velocity profile and electric field interactions with force bias Monte Carlo methods to simulate colloidal fouling in membrane filtration." Thesis, 2009. http://hdl.handle.net/1911/61876.
Full text