Thèses sur le sujet « Surface formation »
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Viik, Rickard. « Surface layer formation on the surfaces of metallic lithium, copper and iron ». Thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257571.
Texte intégralCamps, Ameena Penelope. « Hydrate formation in near surface ocean sediments ». Thesis, University of Leicester, 2008. http://hdl.handle.net/2381/30465.
Texte intégralLee, Caroline Sunyong. « Surface layer formation on Pb/Sn alloys ». Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11603.
Texte intégralRonda, Afonso Jose. « Railway formation condition assessment using seismic surface waves ». Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/66239.
Texte intégralDissertation (MSc)--University of Pretoria, 2016.
Civil Engineering
MSc
Unrestricted
Adler, Jeanette. « Film Formation and Surface Tension Studies of Powder Coatings ». Thesis, KTH, Fibre and Polymer Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3935.
Texte intégralIn industrial use of paint systems a swift processing is crucial. Another very important issue is to improve the quality of the final coating. This report investigates the film formation process of powder coatings, specially the spreading of individual powder particles. The obtained results can be used to understand and control the film formation process. In this way the desired levelling can be achieved and thus the desired gloss or other surface characteristics that may be required. This means that the method could be used when evaluating different polymer and additive combinations that could be used to change film formation behaviour or curing time for powder coating systems to suit various substrates. It makes it possible to avoid and minimize different surface defects as orange peel or cratering in the powder coated film.
We used a reflection optical microscope to better understand the film formation process and especially the spreading of a powder melt on surfaces with various surface energies. The obtained data were: the particle diameter, the area, area ratio and the contact angle of the powder particle as a function of time and temperature. This information can be used to derive the surface tension of any powder melt.
In this report we evaluate the dependencies of temperature, heat rate and surface energy for powder coatings on different substrates. The method provides information that can be used to optimize the film formation of a specific powder coating/substrate combination. This method can be used to evaluate the powder spreading and levelling on different substrates from a surface tension point of view.
We found, as expected, that the powder flows out on a hydrophilic surface and is inhibited by a hydrophobic. The increase of the area ratio on a hydrophilic surface was about five times as the initial area coverage and on a hydrophobic surface only two times the initial area coverage. The contact angle between the melted powder particle on the different surface types could be calculated. The melt surface tension could be calculated since three substrates surfaces with various surface energies were used. The melt surface tension was found to be about 18.5 mN/m.
Sammanfattning
Vid industriell användning av ett färgsystem är det viktigt med en snabb och smidig målningsprocess. En viktig del är att förbättra kvaliteten på den färdiga ytan. Denna rapport undersöker filmbildningsprocessen för pulverfärg, närmare bestämt spridningen av individuella pulverpartiklar. Resultaten från utvärderingen av denna metod kan användas för att bättre förstå och få kontroll över filmbildningsprocessen. Med denna undersökningsmetod kan den önskade utslätningen uppnås och därmed den önskade glansen eller annan yteffekt som kan vara önskvärd.
Metoden kan användas för att utvärdera olika polymer- och additivkombinationer som kan användas för att ändra filmbildningens uppförande eller bestämma härdningstiden för en pulverfärg att passa ett visst substrat. Metoden gör det möjligt att förhindra och minska olika ytdefekter såsom apelsinskals- eller kratereffekter i pulverfärgens yta.
Ett optiskt reflectionsmikroskop användes för att bättre kunna förstå filmbildningsprocessen och särskilt spridningen av smält pulver på substrat med olika ytenergier. De mätdata vi fick var partikeldiameter, area, areaförändring och kontaktvinkeln för pulverpartiklar som funktion av tid och temperatur. Ur denna information kunde pulversmältans ytenergier härledas.
I denna rapport utvärderas pulvrets beroende av temperatur, uppvärmning och ytenergi på olika substrat. Denna metod ger information som kan användas för att optimera filmbildningen av en specifik kombination av pulverfärg och substrat. Denna metod kan också användas för att utvärdera pulverspridning och utjämning av färgfilmen på olika substrat med avseende på ytenergierna.
Som förväntat flyter pulvret ut på hydrofila ytor och utflytningen ändras på en hydrofob yta. På en hydrofil yta sprider sig partikeln till fem gånger den ursprungliga arean över substratet och motsvarande två gånger för en hydrofob yta. Kontaktvinkeln mellan en smält pulverpartikel på olika sorters substrat från utförda mätningar beräknas utifrån utförda mätningar. Kontaktvinklar mellan pulver och olika substrat kan användas för att beräkna smältans ytspänning. Smältans ytspänning kan beräknas då experiment gjorts på tre sorters ytor med olika kända ytenergier. Smältans ytspänning var 18,5 mN/m.
Slutsatsen är att det går att observera och utvärdera resultaten av utsmältningsförloppet för pulverfärg med denna metod.
Meyer, Anne E. « Dynamics of "conditioning" film formation on biomaterials ». Malmö : [s.n.], 1990. http://catalog.hathitrust.org/api/volumes/oclc/21989234.html.
Texte intégralTodorovi´c-Marini´c, Dragana. « Pattern formation during electrohydrodynamic convection with a free surface ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq20856.pdf.
Texte intégralOswald, Robert [Verfasser]. « Formation and surface exchange of nitrous acid / Robert Oswald ». Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1049968956/34.
Texte intégralWang, Zhi. « Mineral scale formation-aspects of surface energy and adhesion ». Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434828.
Texte intégralFarnham, Taylor A. « Hydrate formation and adhesion on low surface energy materials ». Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104142.
Texte intégralThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 43-44).
Clathrate hydrates are ice-like solid substances that often form inside oil and gas pipelines and are responsible for flow blockages, sometimes leading to catastrophic disasters. Minimizing hydrate adhesion and accumulation of solids on pipelines can effectively address this problem. In this thesis, we reduce the adhesion of cyclopentane hydrates by promoting the formation of a cyclopentane barrier film between the hydrate and the solid surface. The presence of this liquid film depends on the spreading coefficient of cyclopentane on the solid in the presence of water. Through a systematic modification of the surface chemistry of the solid surface using two different silanes, we correlate the wettability of water and cyclopentane to the adhesion of cyclopentane hydrates. We demonstrate negligible hydrate formation and adhesion on octadecyltrichlorosilane-coated surfaces via macroscopic visualization, surface tilt and adhesion measurements. The use of the spreading coefficient as a design parameter could further advance the development of effective, passive, hydrate-repelling surfaces.
by Taylor A. Farnham.
S.M.
Kim, Ji Hoon. « The star formation history of low surface brightness galaxies ». College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7646.
Texte intégralThesis research directed by: Dept. of Astronomy. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Gaceb, Mohamed. « An investigation of microcrack formation on machined surfaces ». Thesis, Sheffield Hallam University, 1985. http://shura.shu.ac.uk/20604/.
Texte intégralBuhaug, Øyvind. « Deposit Formation on Cylinder Liner Surface in medium-speed Engines ». Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-209.
Texte intégralThe presence of deposits in the honing grooves in diesel engine cylinder liners can cause a severe increase in the consumption of lubricating oil. These deposits may appear amber in which case they may be referred to as 'liner lacquerer' or be nearly invisible in which case they are often referred to as 'transparent glaze' or 'bore glaze' in the marine sector. The formation of these deposits is believed to be influenced by engine design, engine load, fuel composition and lubricating oil composition. This relationship has, however, not been well understood and little material has been published on this subject. This thesis describes an investigation of this phenomenon. The problem has been approached by studying the composition of deposit samples, studying cases of deposit formation in the field and through experimental work.
As a result of this work, it is hypothesized that the root cause of the deposit formation is a mismatch between the rate of formation of oil insoluble material on or within the oil film and the oil film dispersing power and exchange rate. A large number of parameters will affect this balance which explains the sliding shift in appearance and composition of 'liner lacquer' and 'bore glaze' and the difficulty in identifying the cause of this problem.
A combined mass balance and chemical kinetics approach is used to bridge the gap between fundamental deposit theory and tangible engine related parameters. It is thus possible to rationalize the formation of deposits on cylinder liners. This understanding is sufficient to point out which factors should be considered in terms of the prevention of deposit formation and to present a viable hypothesis on the reason for the deposit formation in the engines that have been investigated in the course of this work as summarized in the following paragraph.
The presence of deposit indicates that the dispersing power and transport rate of the oil film is insufficient to deal with the deposit precursors being formed. This is believed related to extensive low load operation which is associated with both low liner temperatures and low nominal oil consumption in these engines. Low liner temperatures will encourage the formation of insoluble material due to condensation of sulphuric acid precursors, while low oil consumption is believed to indicate low oil film exchange which reduces the transport of matter and also contributes to oil film oxidation by prolonging the exposure to combustion gases.
Murray, Raquel. « Effects of surface roughness on bloodstain spreading and spine formation ». Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10368.
Texte intégralAlves, Verdasca José A. « Pattern formation in surface reactions :the role of nonlinear diffusion ». Doctoral thesis, Universite Libre de Bruxelles, 2000. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211803.
Texte intégralAlhazmi, Muflih. « Exploring mechanisms for pattern formation through coupled bulk-surface PDEs ». Thesis, University of Sussex, 2018. http://sro.sussex.ac.uk/id/eprint/78232/.
Texte intégralLin, Leigh. « Controlling CRUD vapor chimney formation in LWRs through surface modification ». Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/95594.
Texte intégralCataloged from PDF version of thesis.
Includes bibliographical references (pages 105-112).
Fouling has been a persistent problem for fluid-solid interfaces, varying from heat exchangers to ship hulls. In nuclear power plants, buildup of CRUD can accelerate corrosion, increase pressure drops, cause axial power shifts, and increase radiation dose to workers. In this experiment, we studied the effect of induced microcavity and micropost patterns on CRUD morphology at atmospheric pressure. Samples with various pitches of microcavities and microposts were boiled in simulated PWR coolant. The effect of heat flux on CRUD formation was also examined. The experiments support previous theories that subcooled nucleate boiling is enhanced at microcavities, and that CRUD deposition is promoted at those sites. A thin ring of particles, less than a micrometer in width, was seen around most microcavities even when the surrounding areas were crudded. However, some of the samples with microcavity pitches 50 pm and smaller experienced a pattern of clean and crudded areas, with the region around the microcavities free of CRUD more often than not. A theory is put forth that this is caused by interfering forces due to bubbles collapsing. The micropost samples showed substantial CRUD growth, particularly for the sample subjected to a high heat flux. The results of this experiment could have major implications for development of a self-cleaning material for heated surfaces.
by Leigh Lin.
S.M.
Akizuki, Makoto. « Gas Cluster Ion-Solid Surface Interaction and Thin Film Formation ». Kyoto University, 1999. http://hdl.handle.net/2433/181783.
Texte intégralPickering, Timothy Edward 1970. « Kinematics and star formation properties of low surface brightness galaxies ». Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282756.
Texte intégralTeixeira, Miguel Angelo Cortez. « Interaction of turbulence with a free surface ». Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340045.
Texte intégralSteel, James. « Surface photometry of early-type galaxies in rich clusters ». Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4868/.
Texte intégralMesgar, Mostafa [Verfasser]. « Multi-scale modeling of island formation and surface dynamics on the Au(100) surface / Mostafa Mesgar ». Ulm : Universität Ulm. Fakultät für Naturwissenschaften, 2015. http://d-nb.info/1075253683/34.
Texte intégralGumbs, Vernice Pamela. « THE RELIABILITY OF SURFACE ASSEMBLAGES IN ARCHAEOLOGICAL INTERPRETATION ». University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin975606147.
Texte intégralEvteev, Alexander V., Elena V. Levchenko, Irina V. Belova et Graeme E. Murch. « Formation of a surface–sandwich structure in Pd-Ni nanoparticles by interdiffusion : Formation of a surface–sandwich structure in Pd-Ni nanoparticlesby interdiffusion : atomistic modelling ». Diffusion fundamentals 6 (2007) 18, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14192.
Texte intégralRathman, James Flinn. « A study of the thermodynamics of micelle formation in binary surfactant mixtures / ». Full-text version available from OU Domain via ProQuest Digital Dissertations, 1987.
Trouver le texte intégralNielsen, Jon-Fredrik. « Energetically and kinetically driven step formation and evolution on Silicon surfaces / ». The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486402957194989.
Texte intégralAmeripour, Sharareh. « Prediction of gas-hydrate formation conditions in production and surface facilities ». Texas A&M University, 2005. http://hdl.handle.net/1969.1/4220.
Texte intégralFarajollahi, Farid [Verfasser]. « Formation of self-assembled microstructure on the polymer surface / Farid Farajollahi ». Ulm : Universität Ulm. Fakultät für Naturwissenschaften, 2016. http://d-nb.info/1084767732/34.
Texte intégralHuang, Zhoushen. « Spontaneous formation of charge inhomogeneity on silica surface immersed in water / ». View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202007%20HUANG.
Texte intégralWollschläger, Daniel. « Dynamic surface completion the joint formation of color, texture, and shape / ». [S.l.] : [s.n.], 2006. http://e-diss.uni-kiel.de/diss_1637/d1637.pdf.
Texte intégralSun, Wei. « EVAPORATION-INDUCED FORMATION OF WELL-ORDERED SURFACE PATTERNS ON POLYMER FILMS ». UKnowledge, 2015. http://uknowledge.uky.edu/cme_etds/54.
Texte intégralLiu, Y. « Path planning algorithms for unmanned surface vehicle formation in maritime environment ». Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1501049/.
Texte intégralMikolutskiy, S. I., V. A. Yamschikov, V. Yu Khomich et V. A. Shmakov. « Model of Nanostructure Formation on Solid Surface Melted by Laser Pulse ». Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35417.
Texte intégralSmith, Maureen McBride. « Modeling trihalomethane formation in bromide-containing surface water undergoing conventional treatment ». CSUSB ScholarWorks, 1993. https://scholarworks.lib.csusb.edu/etd-project/638.
Texte intégralCooperstein, Michael Stephen. « The effects of slope aspect on the formation of surface hoar and diurnally recrystalized near-surface faceted crystals ». Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/cooperstein/CoopersteinM0508.pdf.
Texte intégralFurbank, Roy Jeffrey. « Drop formation from particulate suspensions ». Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-05172004-100527/unrestricted/furbank%5Froy%5Fj%5F200407%5Fphd.pdf.
Texte intégralSchork, F. Joseph, Committee Chair ; Morris, Jeffrey F., Committee Co-Chair ; Forney, Larry J., Committee Member ; Breedveld, Victor, Committee Member ; Mucha, Peter J., Committee Member ; Smith, Marc K., Committee Member. Includes bibliographical references.
Reffet, Erwan. « Interaction Surface-Atmosphère en Planétologie Comparée : Application à la formation des dunes ». Phd thesis, Université Paris-Diderot - Paris VII, 2010. http://tel.archives-ouvertes.fr/tel-00656378.
Texte intégralWesley, Daniel. « The role of surface wettability on bubble formation in air-water systems ». Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/13482/.
Texte intégralKishawy, Hossam Eldeen A. « Chip formation and surface integrity in high speed machining of hardened steel / ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/NQ42858.pdf.
Texte intégralDanhorn, Thomas. « Agrobacterium tumefaciens biofilm formation polar surface attachment and response to phosphorus starvation / ». [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3277983.
Texte intégralSource: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5720. Adviser: Clay Fuqua. Title from dissertation home page (viewed May 9, 2008).
Chu, Hiu-ping, et 諸曉平. « Trihalomethane formation in contaminated surface water and its controlby membrane bio-reactor ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29744052.
Texte intégralTaquet, Vianney. « Chimie à la surface des grains dans les régions de formation stellaire ». Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00790641.
Texte intégralHsiao, Wen Kai 1972. « Effects of surface properties on solder bump formation by direct droplet deposition ». Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27100.
Texte intégralIncludes bibliographical references (leaves 158-162).
Recent advances in microdroplet generation and deposition processes have made it possible to directly form solder bumps on integrated circuits using micron-sized molten metal droplets. The direct droplet deposition bumping process can potentially produce uniform-sized bumps more economically than the existing processes such as plating and stencil printing. However, the development of this new bumping method is still in its infancy, particularly because of a lack of understanding about the post-impact deposition behavior of molten droplets on solid targets. A deposited molten on the deposition efficiency, as well as on the final bump size and shape. The present study investigates the effects of wetting and surface roughness on droplet bouncing during solder bump formation. The potential for droplet bouncing is modeled based on the energy difference between the maximum spreading and equilibrium sessile stages of a deposited droplet. Validated by experimental results, the model shows that strong droplet-surface wetting can significantly reduce the tendency for a deposited droplet to bounce. The effect of surface droplet can sometimes recoil violently after the initial spreading and rebound off the target surface. Such behavior, known as bouncing, has a strong influence roughness on the bouncing potential is represented by the roughness-induced incomplete wetting during droplet deposition, a phenomenon quantified by a change in the effective contact area under the deposited droplet. An idealized surface model is used to represent the real surface and to describe the relationship between various roughness parameters to changes in the effective contact area. The theoretical analysis, validated by empirical data, shows that surface effective
(cont.) contact area. The theoretical analysis, validated by empirical data, shows that surface roughness promotes bouncing during solder bump formation. The results from this study suggest that droplet bouncing during solder bump formation may be effectively controlled by improving the surface wetting and minimizing the substrate surface roughness. The knowledge gained is also relevant to other droplet-based manufacturing processes such as spray forming, coating, and rapid prototyping.
by Wen-Kai Hsiao.
Ph.D.
Evteev, Alexander V., Elena V. Levchenko, Irina V. Belova et Graeme E. Murch. « Formation of a surface–sandwich structure in Pd-Ni nanoparticles by interdiffusion ». Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193359.
Texte intégralHowes, Paul Bedford. « The formation of gold-semiconductor interfaces determined by surface X-ray diffraction ». Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/35918.
Texte intégralBrensing, Tess. « Reduction of heterocyclic amine formation in beef by surface application of spices ». Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13120.
Texte intégralFood Science Institute
J. Scott Smith
Heterocyclic amines (HCAs) are cancer causing compounds formed during the cooking of meat. Previous studies show that incorporating antioxidant spices into meat as well as marinating meat with antioxidant spices reduces formation of HCAs. The purpose of this study was to determine if commercially available spices applied to the surface of meat could effectively reduce HCA formation. Two commercially available spice blends and one blend of spices with known quantities of antioxidant spices were sprinkled onto the surface of beef just prior to pan-frying. The quantities of spices used were based on the amounts customarily consumed in typical Western cooking. The results of direct application were then compared to marinating with the same types and amounts of spices. The antioxidant potential of the spices was analyzed using DPPH and total phenolics methods. Results indicated that the spices would be effective antioxidants. Low recovery rates and problems during the extraction process made results inconclusive, but suggest that further research may find that applying spices directly to the surface of meat in consumer acceptable quantities may be as effective as marinating at reducing the formation of HCAs.
Doeuvre, Loïc. « Formation de plasmine à la surface cellulaire : de la vésiculation à l'apoptose ». Caen, 2010. http://www.theses.fr/2010CAEN3126.
Texte intégralFibrinolysis and proteolysis are both controlled by the conversion of plasminogen into plasmin at the surface of fibrin or at the cell membrane by tissue- (tPA) or urokinase-type (uPA) plasminogen activators. Endothelial cells and neurons, the two main sources of tPA, are in close interaction in the neurovascular unit. Plasmin formed on adherent vascular cells is a key actor in cell-matrix interactions and plays an important role in cell detachment-induced apoptosis. However, the direct response of adherent cells to the formation of plasmin at their surface is still not characterized and was the object of these studies at the level of the neurovascular unit. We show that plasmin besides its effects on the extracellular matrix, also induces direct effects on cells. Cell detachment induced by proteolysis leads to a divergent cell response: neurons form aggregates that has a prolonged survival whereas endothelial cells enter the apoptotic pathway. Interestingly, all adherent cells studied in the present report show a common early stage of cell activation: membrane blebbing and the release of microvesicles (0. 1 to 1 µm in size). Beyond their identity antigens and procoagulant phosphatidylserine, microvesicles carry other bioactive molecules such as tPA or uPA. Microvesicles carrying uPA participate in a new anti-thrombotic mechanism, the fibrinolytic cross-talk. Activated cells release therefore messengers that precede cell detachment and may act as effectors in intercellular communication. For these reasons they are considered as biomarkers of cell activation in pathological states
Rusinovn, P. O., J. M. Blednova et E. Y. Balayev. « Formation of Multi-functional TiNi Surface Layers via High-speed Flame Spraying ». Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35286.
Texte intégralSeantier, Bastien. « Formation et caractérisation d'empreintes moléculaires à la surface de bicouches lipidiques supportées ». Université Louis Pasteur (Strasbourg) (1971-2008), 2004. http://www.theses.fr/2004STR13101.
Texte intégralThis work explores the first step towards a new method for creating molecular imprints on surfaces based on template-induced surface reconstruction. Mixed lipid bilayers are used as a two-dimensional liquid for inducing local demixing and their transition to a gel phase for stabilizing the template-imposed structures. Thus the reversible imprinting process is based on the fluid to gel main transition of lipids, especially phospholipids. Single lipids or lipid mixtures having a phase transition temperature near the ambient temperature are used. The composition of lipid membrane is responsible for the structural fit (lipid headgroups) and a topological fit (legth of aliphatic chains). Since very little is known about the preparation and properties of such systems, a study of the formation of supported lipid bilayers (SLBs) close to their phase transition temperature was initiated. The influence of experimental parameters such as composition and pH of the buffer, the vesicle concentration, temperature and the chemical nature of the lipids on the mechanism and the kinetics of the SLB formation have been studied by dissipation enhenced quartz crystal microbalance (QCM-D), atomic force microscopy (AFM) and fluorescence microscopy. The results show in detail how the formation of SPBs depends on experimental parameters and allow to speculate on a more detailed mechanims of SPB formation. Then, the imprint formation of two proteins (trypsin inhibitor and annexin V) have been studied with two lipid mixtures. We have developed an experimental protocol to analyse their interaction. The results show the presence of molecular imprints at the surface of lipid membranes, the reproducibility and the reversibility of molecular imprinting process. However, the preliminary experiments exhibit the fact that the imprints are not yet highly specific and that the lipid system needs to be optimised further
Atkinson, Lee. « Ullmann Dehalogenation of Dibromoferrocene for the formation of surface-confined molecular rotors ». Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208016/3/Lee_Atkinson_Thesis.pdf.
Texte intégral