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Dissertations / Theses on the topic 'Colloid'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Hennequin, Yves. "Phase behaviour of colloid-colloid and colloid-polymer mixtures with large size ratios." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404436.

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2

Jones, David Andrew Ross. "Depletion flocculation of sterically-stabilized particles." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364692.

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3

Ryan, Joseph Nolte. "Groundwater colloids in two Atlantic coastal plain aquifers : colloid formation and stability." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14560.

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4

Sakampally, Vara Prasad Reddy. "Increased Control over Gold Colloid Adsorption on Substrates for Colloid Displacement Lithography." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/109.

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Colloid displacement lithography is proving to be very effective in the designing of nanometer scale electronic devices. Precise control of the structure of matter at the nanometer scale has brought a revolutionary change in science and technology. The use of these nanometer scale devices ranges from the diagnosis of various diseases to cell repair to ultra strong materials. This research focused on optimizing the conditions for gold colloid particle adsorption for colloid displacement lithography, an expansion on gold colloid particle manipulation techniques using a scanned probe microscope.

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5

Dalodière, Elodie. "Sonochimie du plutonium : synthèse et spéciation en solution et à l'état colloïdal." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT177/document.

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Le plutonium est produit dans les centrales nucléaires à partir de l’oxyde d’uranium utilisé comme combustible. Cet élément peut être détecté dans l’environnement du fait des essais nucléaires, accidents industriels, sous-marins nucléaires et déchets radioactifs. Le Pu peut ainsi être dispersé sous la forme de particules présentant différentes compositions chimiques et morphologiques, et plus particulièrement sous la forme colloïdale. La connaissance de la structure et de la réactivité de ces espèces s’avère primordiale pour la compréhension et la prédiction de leur éventuelle migration dans l

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6

López, Urdiales Jóse Mariano 1977. "Progress in colloid propulsion." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28891.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2004.<br>Includes bibliographical references (p. 61-68).<br>In the early decades of the Space Age, a great deal of work was put into the development of the Colloid Thruster as an electric propulsion system for spacecraft. In spite of the effort by the end of the 70s the programs were stopped in the USA and Europe before any design had gotten to fly in space. An exhaustive study of the literature has been performed to identify what were the reasons behind the disappearance of Colloid Thrusters. Apart fr

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7

Neyland, Ryan P. "Colloid Detachment from Rough Surfaces in the Environment." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050505-114151/.

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8

Quarcoo, Naa Larteokor. "Modeling polymer-colloid phase behavior." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 152 p, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1440615.

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9

Velásquez, García Luis Fernando 1976. "A microfabricated colloid thruster array." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/82201.

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10

Ruhwandl, Roland Wilfried. "Colloid particles in liquid crystals." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627338.

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11

Pham, Khoa Nguyen. "Glasses in colloid-polymer mixtures." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/15644.

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12

Roy, Thomas Robert. "Plasma Potential Measurements in a Colloid Thruster Plume." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-042705-114729/.

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13

Yanagishima, Taiki. "DNA-colloid systems and micro-rheology." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/265566.

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We investigate the behaviour of DNA-colloid systems using micro-rheology, with a view to demonstrating the efficacy of passive particle-tracking methodologies and developing entirely new systems. Chapter 1 introduces the fields of DNA coated colloids (DNACCs) and passive micro-rheology, with a particular fo cus on the challenges of creating an equilibrating DNACC system and the practicalities and limitations of passive microrheology in gaining access to valid rheological information. In Chapter 2, we present a newly developed realtime monitoring algorithm for complex moduli in optical tweezer

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14

Da, Silva Angela Jane. "Investigation of a superheated superconducting colloid." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28374.

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In recent years, there has been increasing interest in the idea of using a superheated superconducting colloid (SSC) as a detector for neutrinos and dark matter candidates. The primary objective of this work has been to investigate the basic properties of an SSC, consisting of 7 μm radius tin grains imbedded in epoxy, using a pumped ⁴He cryostat with a low vibrational noise RF-SＱUID readout system. The superheating-supercooling hysteresis curves of the colloid have been measured in applied magnetic fields ranging from 3.1 x 10⁻⁴T to 1.4 x 10⁻²T. The superconducting to normal phase transition i

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15

Alzhrani, Attyah. "Fabrication of anisotropic polymer colloid particles." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/46004/.

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The fabrication of complex colloidal particles with anisotropic "patchy" e.g. Januslike, morphology will be studied. Known approaches towards "Janus particles" focus mostly on the micron-sized domain, with common fabrication routes based on monolayer modification or microfluidic production (restricts scale-up). We operate in the submicron regime (typically 100-500 nm) and use scalable emulsion polymerization strategies, in combination with entropic phase separation of swollen cross-linked latex particles and living radical polymerization, i.e. SET-LRP, to prepare our "patchy" amphiphilic parti

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16

Cao, X. "Colloid and interface aspects of ultrafiltration." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636202.

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Osmotic pressure and diffusion coefficients were studied experimentally and theoretically in order to facilitate fully quantitative descriptions of ultrafiltration processes. These parameters may be incorporated in the solution of the equations for hydrodynamics and mass transfer in the filtration module. Theoretical descriptions are presented to allow calculation of osmotic pressure, taking account of the electrostatic repulsive interactions, London Van Der Waals forces, configurational entropy and additional interactions of unknown source. Approaches of constant zeta potential and charge reg

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17

Zhou, Juan. "Phase separation in colloid-polymer mixtures." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544388.

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18

Rahman, Syed Hafizur. "Colloid movement through saturated sandstone matrix." Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434702.

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19

Dean, J. C. J. "Colloid systems in liquid scintillation counting." Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381855.

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20

Galloway, Linda A. "Phase behaviour of colloid-micelle mixtures." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/10916.

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We have studied the phase behaviour of both charged and uncharged hard colloidal particles in a solution of wormlike micelles of the nonionic surfactant C<sub>16</sub>E<sub>6</sub>. The behaviour found is similar to that in the case of colloid-polymer mixtures. The phase boundaries agree well with theoretical predictions of an adapted colloid-polymer depletion model that accounts for the concentration induced growth and the exponential size distribution of the micelles. In the case of uncharged colloids a stable one phase fluid region is found at low surfactant concentrations. As the concentra

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21

Sherriff, Nicholas Kevin. "Radionuclide dissociation from bentonite colloid systems." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/radionuclide-dissociation-from-bentonite-colloid-systems(43918efc-26e4-4e41-a450-3e209c20340d).html.

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Deep geological disposal is a method of managing high level, long-‐lived nuclear waste. It is a concept that many countries are exploring for the possibility of managing nuclear waste generated from power production. For deep geological disposal to be viable then areas where problems may surface have to be explored. Bentonite clay has been proposed as the material to be used for the backfill of the repositories. Its swelling properties ensure that it will expand to plug the bore holes that will be made for the waste, its impermeable nature restricts contact between groundwater and the waste p

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22

Semeraro, Enrico Federico. "Interactions effectives et dynamiques en systèmes actifs de colloïdes autopropulsés." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV017/document.

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L’objectif de ce projet était l’étude systématique des interactions, de la microstructure et de la dynamique de suspensions de colloïdes qui imitent les mouvements de systèmes auto-propulsés (actifs), au moyen de techniques de diffusion : diffusion des rayons X aux (ultra) petits angles (USAXS/SAXS) et spectroscopie de corrélation de photons X (XPCS).À la différence des colloïdes passifs conventionnels (particules browniennes), les colloïdes actifs sont des systèmes hors équilibre faits d’objets auto-propulsés. Ces systèmes montrent une dynamique fascinante qui s’apparente aux mouvements de vo

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23

Lubarsky, Gennady V. "Colloid phenomena in surface-modified polymer systems." Thesis, Robert Gordon University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425376.

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24

Huh, Ji Yeon. "Structure and dynamics of colloid-polymer solutions." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 196 p, 2008. http://proquest.umi.com/pqdweb?did=1654493491&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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25

Gilligan, Stephen Thomas. "Delayed gravitational collapse of colloid-polymer gels." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738280.

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26

Yoon, Kisun. "Synthesis and Applications of Non-spherical Dimer Colloids." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10568.

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Colloids are promising building blocks in material synthesis because of their controllability of size and surface properties. The synthesis of chemically and/or geometrically anisotropic colloidal particles has received attentions with the expectation of building blocks for complex structures. However, the synthesis of anisotropic colloidal particles is by far more difficult than the synthesis of spherical colloidal particles. Lack of monodispersity and productivity of many anisotropic particles often limits their applications as a building block for complex structures. Thus, it is highly desi

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27

Bayliss, Katie. "Colloid-microgel mixtures : phase behaviour and temperature response." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633101.

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Recently, interest has been shown in stimuli responsive microgel particles as depletants, capable of inducing entropy driven phase transitions in colloidal systems. Due to their temperature induced deswelling transition , which occurs above ~32 'c, poly(N-isopropylacrylamide) (pNIPAM) microgels present opportunities for the easy modulation of depletion interactions between colloids. The aim of the current project was to gain an understanding of the phase behaviour of colloidal particles mediated by pNIPAM microgels both below and above the volume phase transition temperature (VPTT) , for poten

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28

Brader, Joseph Michael. "Statistical mechanics of a model colloid-polymer mixture." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364892.

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29

Starrs, Laura. "Collapse of transient gels in colloid-polymer mixtures." Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/14483.

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The addition of non-absorbing polymer to a suspension of colloidal hard-spheres causes phase separation via the depletion mechanism. At high enough concentration of polymer a variety of non-equilibrium aggregation behaviour are observed. Transient gels are one such behaviour observed at the highest polymer concentrations. Transient colloid-polymer gels are metastable space-filling particle networks. They persist for some finite time before suddenly collapsing to form a dense sediment. Thus transient gels exhibit "delayed sedimentation" which is a phenomenon observed in many weakly aggregated s

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30

Razak, Huzaifah Haritsah Abdul. "Wetting behaviour of colloid-polymer mixtures in confinement." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:e75a8463-fe02-46f3-ba95-7d7b40c955cb.

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We study the wetting behaviour of phase-separating colloid-polymer mixtures in confinement. The phase separation is due to the depletion attraction between the colloids mediated by the polymers and bears similarities to ordinary phase separation of oil and water. We use laser scanning confocal microscopy to investigate the behaviour of our colloidal mixture in the vicinity of different substrates, which serve as the confining walls. The glass walls used are chemically modified with two types of polymer, polyacrylamide and chitosan, and we also use clean glass as a reference. We find that the p

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31

Teece, Lisa Joanne. "Controlling the collapse of weak colloid-polymer gels." Thesis, University of Bristol, 2011. http://hdl.handle.net/1983/c03d9c4a-822f-4e0f-81c6-afc010c8db86.

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Colloidal gels which are formed as the result of weak depletion attractions exhibit a two stage settling behaviour under gravity. Initially the space spanning network displays solid like behaviour and is resistant to gravitational effects. This structure persists for a finite period of time defined as the delay time TD . When the age of the gel exceeds its characteristic TD the structural integrity of the network is lost and it begins to rapidly collapse. The microscopic processes which are responsible for this sudden collapse have yet to be established and a better understanding is imperative

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32

Bonham, Jessica Anne. "Microgel particles in non-aqueous colloid - polymer mixtures." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702920.

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Microgel particles are cross-linked polymer latex particles that can form stable colloidal dispersions and swell in response to their environment. This project focuses on microgels, in particular poly(styrene) particles cross-linked with either divinyl or diisopropenylbenzene, that can be swollen in non-aqueous solvents. The synthesis and characterisation of the particles is discussed as well as their extent of swelling as a function of solvency, cross-linker type and density, initiator and temperature. Finally, the behaviour of micro gel particles in binary and ternary mixtures with non-adsor

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33

Pirie, Angus D. "A light scattering study of colloid-polymer mixtures." Thesis, University of Edinburgh, 1995. http://webex.lib.ed.ac.uk/homes/pirie95.html.

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34

Gerken, Katherine. "Comparison of Small Volume Bolus Administration of Hypertonic Saline, Colloid, and Hypertonic Saline-Colloid Combination in Dogs with Isoflurane-Induced Hypotension." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524174319356144.

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35

Humby, Steven John. "Modelling of flow and colloids in porous media." Thesis, University of Surrey, 1999. http://epubs.surrey.ac.uk/844200/.

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Porous media and transport within them play technically important roles in many of our industries. However, classical mean field engineering descriptions used to model the complex interactions between the porous medium and the fluids and colloids within it are not completely satisfactory. The design capability of the engineering community would be greatly enhanced if these models could be more clearly linked to the mesoscopic details of the fluid/suspension/porous solid systems. This would allow cheaper, yet quicker, and more innovative design and optimization of systems involving fluid/suspen

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36

Whyman, R. H. "Electrophoretic and stability studies of casein coated colloidal particles." Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379647.

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37

Knott, Michael. "Phases and phase transitions in charged colloidal suspensions." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270941.

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38

Ekaireb, Sally Elizabeth. "Dispersion of chemicals and reactions of dispersed chemicals." Thesis, City University London, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254963.

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39

Debacher, Nito Angelo. "Studies on the dynamics of wetting processes." Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240354.

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40

Milling, Andrew John. "Depletion flocculation of sterically stabilised dispersions in non-aqueous media." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317845.

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41

Hoad, Oliver John. "Epoxy functional dispersants for the processing of alumina ceramics." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357644.

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42

Poulichet, Vincent Pierre. "Colloid-stabilised bubbles : particle expulsion triggered by external fields." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/40398.

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Colloidal particles at fluid interfaces are used as precursors in many applications and for the manufacture of novel material, principally because they give outstanding stability to foams and emulsions. The stability is attributed to the large decrease in energy associated with the adsorption of a particle at a fluid-fluid interface, of the order of a million times the thermal energy kT for micrometric particles. In some applications, particle removal from fluid-fluid interfaces is needed, for example, when reactions use expensive colloidal particles, or to achieve phase separation. However, b

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43

Thugu, Mahesh. "Development of Colloid Displacement Lithography Platforms for Sensor Applications." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1287.

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In this work, Poly (diallyldimethylammonium) chloride - (PDDA) was used as a base layer for developing colloid displacement lithography platforms for sensor applications. Previous work shows that glass coated with PDDA and exposed to gold acts as a good platform for colloid displacement lithography. However, for actual sensor applications, electrical isolation of individual sensor sections must be achieved. This is attempted by laying down a 40 μm stripe of PDDA on a cleaned substrate and coating that stripe with gold colloid. The size of 40 μm or less in width is set as the target to fit with

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44

Keeping, Stuart Alan. "The rheology and viscoelastic spectra of concentrated colloid dispersions." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327913.

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45

Ryan, Joseph Nolte. "Clay colloid mobilization in an iron oxide-coated sand." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12905.

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46

Gutsul, O. V. "The rheological and electrical properties of polymer-colloid solutions." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18320.

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47

PERUGINI, Luisa. "Use of colloid systems for food and environmental applications." Doctoral thesis, Università degli studi del Molise, 2018. http://hdl.handle.net/11695/83642.

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Il presente lavoro di tesi si basa sullo studio e l’impiego dei sistemi colloidali per applicazioni alimentari e ambientali. L’applicazione alimentare, sviluppata nella prima parte del lavoro, ha riguardato lo studio di nanoemulsioni edibili preparate con olio di riso, disperso in mezzo acquoso, stabilizzato da caseinato di sodio o da Tween 20 o da una miscela dei due emulsificanti, per la veicolazione nel tratto gastrointestinale di curcumina, molecola con spiccate proprietà bioattive. Il caseinato è stato scelto per le sue proprietà tensioattive e perché è un prodotto naturale, tuttavia è no

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48

Marla, Krishna Tej. "Molecular Thermodynamics of Nanoscale Colloid-Polymer Mixtures: Chemical Potentials and Interaction Forces." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7604.

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Nanoscale colloidal particles display fascinating electronic, optical and reinforcement properties as a consequence of their dimensions. Stable dispersions of nanoscale colloids find applications in drug delivery, biodiagnostics, photonic and electronic devices, and polymer nanocomposites. Most nanoparticles are unstable in dispersions and polymeric surfactants are added generally to improve dispersability and control self-assembly. However, the effect of polymeric modifiers on nanocolloid properties is poorly understood and design of modifiers is guided usually by empirical approaches. Monte

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49

Guzman, Francisco J. "Separation of Colloidal Particles in a Packed Column using Depletion Forces." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/34831.

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Depletion forces were used to separate an equinumber density binary dispersion of 1.5 and 0.82 Âµm polystyrene sulfate (PS) particles. Experiments consisted of injecting a pulse of a binary dispersion of PS particles into the inlet of a packed bed of 0.5 mm silica collector beads. Prior to injection, a carrier fluid of either KCl and KOH electrolyte or a silica nanoparticle dispersion was flowing through the column at steady state. When the carrier fluid was a dispersion of silica nanoparticles, the ratio of PS particles in the column outlet would change from 1:1 big to small particles to slig

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50

Eze, Ngozi A. "Implementing locked nucleic acids as a bioinspired colloidal assembly and disassembly tool." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/51789.

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Oligonucleotides are popular recognition-based biomaterials assembly and disassembly tools due to their specificity and ease of control. Their susceptibility to degradation by nucleases and false positive signals under certain conditions, however, has led to great interest in chemically modified oligonucleotides such as locked nucleic acids (LNA) that enhance both nuclease resistance and target specificity. This dissertation extends prior work with DNA sequences to investigate incorporating locked nucleic acid (LNA), a synthetic oligonucleotide, in isothermal colloidal assembly and disassembly

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