Relevant bibliographies by topics / Colloidal approaches

Academic literature on the topic 'Colloidal approaches'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Colloidal approaches"

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Lattuada, Marco, and Kata Dorbic. "Polymer Colloids: Moving beyond Spherical Particles." CHIMIA 76, no. 10 (October 26, 2022): 841. http://dx.doi.org/10.2533/chimia.2022.841.

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When thinking about colloidal particles, the fist image that comes into mind is that of tiny little polystyrene spheres with a narrow size distribution. While spherical polymer colloids are one of the workhorses of colloid science, scientists have been working on the development of progressively advanced strategies to move beyond particles with spherical shapes, and prepared polymer colloids with more complex morphologies. This short review aims at providing a summary of these developments, focusing primarily on methods applicable to submicron particles, with an eye towards their applications and some discussion about advantages and drawbacks of the various approaches.
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Singh, Sukhbir, Neelam Sharma, Tapan Behl, Bidhan Chandra Sarkar, Hasi Rani Saha, Kanika Garg, Supriya Kamari Singh, et al. "Promising Strategies of Colloidal Drug Delivery-Based Approaches in Psoriasis Management." Pharmaceutics 13, no. 11 (November 22, 2021): 1978. http://dx.doi.org/10.3390/pharmaceutics13111978.

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Psoriasis is a chronic inflammatory autoimmune disorder that moderately affects social and interpersonal relationships. Conventional treatments for psoriasis have certain problems, such as poor drug penetration through the skin, hyper-pigmentation, and a burning sensation on normal and diseased skin. Colloidal drug delivery systems overcome the pitfalls of conventional approaches for psoriasis therapeutics and have improved patient safety parameters, compliance, and superior effectiveness. They also entail reduced toxicity. This comprehensive review’s topics include the pathogenesis of psoriasis, causes and types of psoriasis, conventional treatment alternatives for psoriasis, the need for colloidal drug delivery systems, and recent studies in colloidal drug delivery systems for the treatment of psoriasis. This review briefly describes colloidal drug delivery approaches, such as emulsion systems—i.e., multiple emulsion, microemulsion, and nano-emulsion; vesicular systems—i.e., liposomes, ethosomes, noisomes, and transferosomes; and particulate systems—i.e., solid lipid nanoparticles, solid lipid microparticles, nano-structured lipid carriers, dendrimers, nanocrystals, polymeric nanoparticles, and gold nanoparticles. The review was compiled through an extensive search of the literature through the PubMed, Google Scholar, and ScienceDirect databases. A survey of literature revealed seven formulations based upon emulsion systems, six vesicular drug delivery systems, and fourteen particulate systems reported for antipsoriatic drugs. Based on the literature studies of colloidal approaches for psoriasis management carried out in recent years, it has been concluded that colloidal pharmaceutical formulations could be investigated broadly and have a broad scope for effective management of many skin disorders in the coming decades.
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Ujila, Masuri Siti, and Mathieu Sellier. "Effects of Physicochemical Parameters on Colloidal Potentials." Applied Mechanics and Materials 564 (June 2014): 222–27. http://dx.doi.org/10.4028/www.scientific.net/amm.564.222.

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In particle deposition problems, colloidal potentials play an important role in adsorpting the colloidal particles onto the surface of the deposit wall once the colloids arrive in the vicinity of the wall. Therefore it is important to gain understanding of these potentials, in particular, how they are influenced by the problem parameters. With such an understanding, more insights into mitigating the problem can be obtained, and consequently, more effective approaches to tackle the problem can be taken. In this work, we present the effects of particle size, flow temperature and ionic strength of the solution on the colloidal potentials based on numerical analysis. The results support the conclusion that the rate of initial deposition of particles can be reduced if the particle size is smaller, the flow temperature is increased, and the ionic strength is reduced.
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Ahmadi-Sénichault, A., V. Canseco, N. Sefrioui-Chaibainou, A. Omari, and H. Bertin. "Displacement of Colloidal Dispersions in Porous Media: Experimental & Numerical Approaches." Diffusion Foundations 7 (June 2016): 53–68. http://dx.doi.org/10.4028/www.scientific.net/df.7.53.

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The main objective of this paper is to give more insight on colloids deposition and re-entrainment in presence of a rough surface. Experiments on retention and release of colloids in a porous medium are first presented. The influence of physicochemical and hydrodynamic conditions is investigated. The experimental results cannot be qualitatively interpreted using the DLVO theory and knowledges at pore scale are then needed. A 3D numerical simulation approach at the pore scale is therefore proposed where the motion of colloids is solved in presence of collector surfaces bearing various kinds of asperities and by taking into account physico-chemical interactions calculated at each time step during colloid movement. It is obviously observed that both deposition and mobilization of particles are dependent on solution chemistry and hydrodynamic conditions and are significantly affected by the form and size of the local roughness of the pore surface. Therefore, depending on solution ionic strength and surface topography, colloids may be adsorbed or not and when a particle is retained an increase of flow strength is then needed to remove it and such an increase is specific to the location of occurrence of the adsorption step. In general, simulation results allow us to explain our experimental results that show that by steeply increasing the flow strength, more and more fractions of particles retained inside the porous medium are released until all particles are removed.
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Li, Zhiwei, Qingsong Fan, and Yadong Yin. "Colloidal Self-Assembly Approaches to Smart Nanostructured Materials." Chemical Reviews 122, no. 5 (November 8, 2021): 4976–5067. http://dx.doi.org/10.1021/acs.chemrev.1c00482.

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Wang, Qun. "On colloidal suspension Brownian stability ratios: Theoretical approaches." Journal of Colloid and Interface Science 145, no. 1 (August 1991): 99–107. http://dx.doi.org/10.1016/0021-9797(91)90102-e.

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D'Souza, Lawrence, Andreas Suchopar, and Ryan M. Richards. "In situ approaches to establish colloidal growth kinetics." Journal of Colloid and Interface Science 279, no. 2 (November 2004): 458–63. http://dx.doi.org/10.1016/j.jcis.2004.06.086.

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Kader, N. Syed Abdul, Nazneen Ansari, Ravi Bharti, Naresh Mandavi, Gyanesh Kumar Sahu, Arvind Kumar Jha, and Harish Sharma. "Novel Approaches for Colloidal Drug Delivery System: Nanoemulsion." Research Journal of Pharmaceutical Dosage Forms and Technology 10, no. 4 (2018): 253. http://dx.doi.org/10.5958/0975-4377.2018.00037.x.

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Oncescu, Tatiana, M. Contineanu, and Lucia Meahcov. "Hydrogen evolution from water using CdS as photosensitizer." International Journal of Photoenergy 1, no. 2 (1999): 75–78. http://dx.doi.org/10.1155/s1110662x99000148.

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Colloidal chemical approaches are increasingly utilised for the preparation and stabilization of semiconductor nanoparticles.We prepared a colloidal CdS in excess ofNa2Susing a method described in the literature and determined the particle size from its absorption spectrum by Brus equation. A diameter of about 50Å was calculated. For the stabilization of colloid we choosed from various tested polymers a 1% in weight copolymer (1/1), styrene/maleic anhydride. As redox catalyst we used colloidal Pt obtained “in situ” by irradiaton ofPtCl6K2. We established the role of each of the system partners as: CdS concentration,Na2Sexcess, Pt catalyst concentration, the irradiation time, and the system temperature. We studied the influence of each participant to the hydrogen evolution in order to optimize this system.The formation of nanosize composite particlesCd1−xZnxSshowed an increasing ofH2amount generated under irradiation, in comparison with CdS particles.The results obtained permitted us to calculate the turnover number (TO) of the system.
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Choo, K.-H., I.-J. Kang, S.-H. Yoon, H. Park, J.-H. Kim, S. Adiya, and C.-H. Lee. "Approaches to membrane fouling control in anaerobic membrane bioreactors." Water Science and Technology 41, no. 10-11 (May 1, 2000): 363–71. http://dx.doi.org/10.2166/wst.2000.0681.

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Various fouling control methods were investigated for polymeric and ceramic microfiltration membranes in the anaerobic membrane bioreactors where inorganic precipitates and/or fine colloids have been recently known as the most significant foulants: (i) Substantial improvement of flux was achieved by backfeeding of acidic wastewater through the membrane module. The backfeeding mode formed an acidic environment around the membrane pores and thus suppressed struvite formation. (ii) Struvite precipitation was also mitigated when an additional combined dialysis/zeolite unit was attached to the bioreactor. With this combined unit the flux improvement for the ceramic membrane, where struvite had a severer fouling effect, was achieved more significantly than that for the polymeric membrane. (iii) To control the deposition of organics and fine colloids onto the polymeric membrane, powdered activated carbon (PAC) was added into the bioreactor, which gave rise to the reduction of specific cake resistances of biosolids through the sorption and/or coagulation of dissolved and colloidal matter. (iv) The hydrophilic modification of polypropylene (PP) membranes by graft polymerization reduced membrane fouling. Its effectiveness was most substantial at 70% of the degree of grafting, indicating that there was an optimal degree of grafting. This is possibly due to the steric hindrance of grafted polymer chains and the increase in the hydrophilicity of the grafted PP membrane.
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Dissertations / Theses on the topic "Colloidal approaches"

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Derelli, Davide. "Self-assembly of colloidal particles - a combination of experimental and simulation approaches." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18076/.

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In this project, self-assembly behaviour of colloidal particles was investigated by a combination of both computer simulations and experimental approach. In particular, a Brownian Dynamics algorithm was used to simulate either steep-repulsive spheres or spherocylinders in a shrinking spherical confinement. In accordance with literature, in the former case packed spheres were shown to crystallize into a distinctive icosahedral structure. In the latter study, spherocylinders clearly revealed a local tendency to form smectic layers. After the synthesis of micro-sized fluorescent-labelled silica spheres and rods, particle self-assembly in a spherical confinement was experimentally explored. While our selected method widely produced well-defined spherical supraparticles, it generally failed in inducing crystalline or liquid-crystalline ordering. This outcome was supposed to emerge due to fast compression of particles inside the confinement. In the last part of the project, Brownian Dynamics simulations of mixtures of rods and spheres in a spherical confinement were performed. Our preliminary investigation unveiled a modest tendency for rod-rich mixtures to form a binary smectic configuration. However, same-shape phase separation prominently occurred for increasing fractions of spheres. Notably, a quantitative analysis on the simulated configurations was accomplished by introduction of a novel binary smectic local order parameter.
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Staicu, Lucian. "Production of colloidal biogenic elemental selenium and removal by different coagulation-flocculation approaches." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1180/document.

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Le sélénium (Se) est un élément chalcogène avec un domaine de concentration étroit entre essentialité et toxicité. La toxicité est principalement liée à la spéciation chimique du Se qui évolue en fonction des conditions redox du milieu. Les formes oxyanioniques de Se, le sélénite (Se [IV], SeO32-) et le séléniate (Se [VI], SeO42-), sont solubles dans l'eau, biodisponibles et toxiques. En revanche, le sélénium élémentaire, Se(0), est insoluble et moins toxique. Néanmoins, les nanoparticules du Se(0) sont potentiellement dangereuses pour certains groupes des mollusques (comme les bivalves) et aussi pour les poissons. En outre, lorsque le Se(0) est rejeté dans les écosystèmes aquatiques, sa ré-oxydation jusqu'au sélénite et séléniate peut se produire. Le sélénium élémentaire d'origine biogénique Se(0) a été produit par la réduction de SeO42- dans des conditions anaérobies en utilisant un inoculum microbien mixte (boues granulaires) et par la réduction de SeO32- dans des conditions aérobies en utilisant une culture bactérienne pure (une nouvelle souche de Pseudomonas moraviensis identifiée et caractérisée pour la première fois dans cette thèse). Les deux types de Se(0) ont montré une forte stabilité colloïdale dans l'écart de pH variant de 2 à 12. La stabilité colloïdale est due à la charge négative (-15 mV à -30 mV) de la couche de biopolymère qui entoure Se(0) et à la taille nanométrique des particules de Se(0). La taille des particules de Se(0) produite par la boue anaérobie granulaire se situait entre 50 et 300 nm, avec une taille moyenne de 166 nm. A l'inverse, les nanoparticules de Se(0) produites par Pseudomonas moraviensis stanleyae sont caractérisées par un diamètre plus faible (~ 100 nm).Compte tenu des risques pour l'environnement engendrés par le relargage du Se(0) biogénique, des mesures appropriées doivent être mises en œuvre pour la séparation solide-liquide en utilisant une technologie efficace. Le potentiel de séparation solide-liquide de Se(0) généré a été évaluée par centrifugation, filtration, coagulation-floculation et électrocoagulation. Alors que toutes les approches présentent des rendements de séparation de Se(0) variables, l'électrocoagulation en utilisant des électrodes sacrificielles de fer a montré l'efficacité d'élimination le plus élevée (97%)
Selenium (Se) is a chalcogen element with a narrow window between essentiality and toxicity. The toxicity is mainly related to the chemical speciation that Se undergoes under changing redox conditions. Se oxyanions, namely selenite (Se[IV], SeO32-) and selenate (Se[VI], SeO42-), are water-soluble, bioavailable and toxic. In contrast, elemental selenium, Se(0), is solid and less toxic. Nevertheless, Se(0) nanoparticles are potentially harmful as particulate Se(0) has been reported to be bioavailable to filter feeding mollusks (e.g. bivalves) and fish. Furthermore, Se(0) is prone to re-oxidation to toxic SeO32- and SeO42- when discharged into aquatic ecosystems. Biogenic Se(0) under investigation was produced by the reduction of Na2SeO4 under anaerobic conditions using a mixed bacterial inoculum (anaerobic granular sludge) and through the reduction of Na2SeO3 under aerobic conditions using a pure microbial culture (Pseudomonas moraviensis stanleyae, a novel strain identified and characterized for the first time herein). Both types of Se(0) showed strong colloidal stability within the 2-12 pH range. The colloidal stability is caused by the negatively charged (-15 mV to -30 mV) biopolymer layer covering biogenic Se(0) particles and by their nanometer size. The particle size of Se(0) produced by anaerobic granular sludge ranged between 50 and 300 nm, with an average size of 166 nm. Conversely, the Se(0) particles produced by Pseudomonas moraviensis stanleyae are characterized by a lower diameter (~ 100 nm).The solid-liquid separation potential of Se(0) was assessed by centrifugation, filtration, coagulation-flocculation and electrocoagulation. While all approaches can bring about Se(0) removal from suspension with various degrees of success, electrocoagulation using iron sacrificial electrodes showed the highest removal efficiency (97%). Because biogenic Se(0) is harmful to the environment, appropriate measures must be implemented for the solid-liquid separation using an efficient technology
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Yin, Yadong. "Self-assembly approaches to photonic structures /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/10603.

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Bleier, Blake J. "Droplet-Based Approaches to Probe Complex Behavior in Colloidal Fluids with High Composition Resolution." Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1173.

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In this work, microfluidic and millifluidic droplets are utilized to study and control complex fluid behavior with high composition resolution. Different techniques are used on two length scales to create unique approaches towards the same goal of merging droplet-based experiments with classical colloidal characterization experiments. First, a microfluidic dehydrating droplet device is characterized and a procedure established by concentrating a phase separating organic-inorganic system on chip and using geometric calculations to determine composition. The device is then expanded to a more complex, particle-polymer system to investigate suspension stability and interparticle behavior. A model system containing silica particles and PEO polymer is found to transition from a bridging flocculation mechanism to polymer-coated particle jamming based on the mass ratio of polymer to particle. Lastly, a phase separating particle-polymer system consisting of polystyrene particles and hydroxyethyl cellulose is concentrated on-chip. Interparticle interactions are controlled by varying particle size, polymer size, and polymer type and the effects on phase behavior are examined. Droplet experiments are scaled-up to millifluidic droplets and concentration gradients are used to produce high composition resolution in place of time, used in the dehydrating microfluidic experiments. A novel, millifluidic containment device is created to study aggregation and sedimentation in droplets containing carbon black and OLOA surfactant suspended in dodecane. A slow increase in stabilization behavior is observed as opposed to the previously observed sharp “on-off” effect. The droplet production technique is then improved to achieve more complex composition paths and the device is expanded for a small angle neutron scattering (SANS) application. SANS is performed on flowing droplets with varying concentration to map interparticle interactions and phase behavior of complex particulate systems. Feasibility of device is demonstrated and preliminary model systems of silica particles and polymer, salt, and surfactant are analyzed and characterized.
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Sato, Ai. "Technological approaches for controlling foaming properties of food proteins toward on-site consumption." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263709.

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Elsayed, Mustafa Mohammed Abdelaziz Verfasser], Reinhard H. H. [Akademischer Betreuer] [Neubert, Gregor [Akademischer Betreuer] Cevc, and Alfred [Akademischer Betreuer] Blume. "Analytical approaches to physicochemical characterization of colloidal drug carriers / Mustafa Mohammed Abdelaziz Elsayed. Betreuer: Reinhard Neubert ; Gregor Cevc ; Alfred Blume." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2011. http://d-nb.info/1025202058/34.

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Williams, P. M. "Protein ultrafiltration : a colloidal interaction approach." Thesis, Swansea University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636643.

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The influence of the physicochemical conditions on the permeation rate in dead-end and cross flow ultrafiltration of protein dispersions is investigated. The rigorous mathematical models developed are based on sophisticated descriptions of the protein-protein interactions within the layer close to the membrane surface which is responsible for controlling the permeation rate. The calculations are expressed in terms of an osmotic pressure which accounts for the multiparticle electrostatic interactions, dispersion forces and configurational entropy. Electrostatic interactions are accounted for by a Wigner-Seitz cell approach including a numerical solution of the non-linear Poisson-Boltzmann equation. London-van der Waals forces are calculated using a computationally efficient means of approximating screened, retarded Lifshitz-Hamaker constants. Configurational entropy effects are calculated using an equation of state giving excellent agreement with molecular dynamic data. Electroviscous effects are also taken into account. These descriptions of colloidal interactions are used to develop a priori models, with no adjustable parameters, that allow quantitative prediction of the osmotic pressure and the rate of filtration of protein dispersions as a function of zeta potential (and hence pH), protein size, ionic strength, protein concentration, applied pressure and membrane resistance. The model shows good agreement with literature experimental data for the osmotic pressure of the protein bovine serum albumin (BSA). A further refinement to the models has been the development of a surface charge regulation model from knowledge of the amino acid groups giving rise to the protein charge. For cross flow ultrafiltration, the osmotic pressure is further used in the calculation of the gradient diffusion coefficient from the generalised Stokes-Einstein equation. The filtration models have been tested by conducting dead-end and cross flow ultrafiltration experiments with protein dispersions of BSA and lactoferrin. Good agreement between theory and experiment has been obtained for the dead-end model, but further work is required for the cross flow filtration model.
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Guarino, Andrew Joseph Wrenn Steven Parker. "A colloidal science approach to the study of atherosclerosis /." Philadelphia, Pa. : Drexel University, 2006. http://dspace.library.drexel.edu/handle/1860/723.

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Torrecilla, Paula Jauregi. "Colloidal gas aphrons (CGA) : a novel approach to protein recovery." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387771.

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Zeidan, Michael. "Colloidal aggregation with application to soot mediated lubricating fluids : a multi-level simulation approach." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432657.

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Books on the topic "Colloidal approaches"

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1937-, Larsson Kåre, ed. Cereals in breadmaking: A molecular colloidal approach. New York: M. Dekker, 1993.

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E, Schrader Malcolm, and Loeb George I, eds. Modern approaches to wettability: Theory and applications. New York: Plenum Press, 1992.

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D, Avnir, ed. The Fractal approach to heterogeneous chemistry: Surfaces, colloids, polymers. Chichester, England: Wiley, 1989.

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The Langevin and generalised Langevin approach to the dynamics of atomic, polymeric and colloidal systems. Amsterdam: Elsevier, 2005.

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Ghafar-Zadeh, Ebrahim. CMOS capacitive sensors for lab-on-chip applications: A multidisciplinary approach. Dordrecht: Springer, 2010.

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Staicu, Lucian C. Production of Colloidal Biogenic Selenium and Removal by Different Coagulation-Flocculation Approaches. Taylor & Francis Group, 2015.

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Production of Colloidal Biogenic Selenium and Removal by Different Coagulation-Flocculation Approaches. Taylor & Francis Group, 2018.

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Aarts, D. G. A. L. Soft interfaces: the case of colloid–polymer mixtures. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198789352.003.0013.

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In this chapter we discuss the interface of a phase separated colloid-polymer mixture. We start by highlighting a number of experimental studies, illustrating the richness of colloidal interface phenomena. This is followed by a derivation of the bulk phase behaviour within free volume theory. We subsequently calculate the interfacial tension using a squared gradient approach. The interfacial tension turns out to be ultralow, easily a million times smaller than a molecular interfacial tension. From the bulk and interface calculations we obtain the capillary length and compare to experiments, where good overall agreement is found. Finally, we focus on the thermal capillary waves of the interface and derive the static and dynamic height–height correlation functions, which describe the experimental data very well. We end with an outlook, where we address some outstanding questions concerning the behaviour of interfaces, to which colloids may provide unique insights.
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Emulsion Polymerization: A Mechanistic Approach (Colloid Science). Academic Pr, 1995.

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Heicklen, Julian. Colloid Formation and Growth a Chemical Kinetics Approach. Elsevier Science & Technology Books, 2012.

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Book chapters on the topic "Colloidal approaches"

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Biben, T. "On Effective Interactions in Colloidal Physics." In New Approaches to Problems in Liquid State Theory, 359–78. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4564-0_20.

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Petkovich, Nicholas D., and Andreas Stein. "Colloidal Crystal Templating Approaches to Materials with Hierarchical Porosity." In Hierarchically Structured Porous Materials, 55–129. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527639588.ch4.

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Bagalkot, Nikhil, and G. Suresh Kumar. "Colloidal Transport under Nonlinear Sorption in a Single Variable Fracture Aperture." In Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment, 609–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18663-4_92.

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Wang, Hung-Li, and De-Hao Tsai. "Self-Assembly of Noble Metal-Based Hybrid Nanostructures Using a Combination of Colloidal and Aerosol-Based Approaches." In ACS Symposium Series, 139–56. Washington, DC: American Chemical Society, 2019. http://dx.doi.org/10.1021/bk-2019-1309.ch007.

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Bocquet, Lydéric, and Jean-Pierre Hansen. "Dynamics of Colloidal Systems: Beyond the Stochastic Approach." In Dynamics: Models and Kinetic Methods for Non-equilibrium Many Body Systems, 1–16. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4365-3_1.

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Rosenholm, Jarl B. "Wetting of Surfaces and Interfaces: A Conceptual Equilibrium Thermodynamic Approach." In Colloid Stability, 1–83. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527631094.ch1.

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Rosenholm, Jarl B. "Wetting of Surfaces and Interfaces: A Conceptual Equilibrium Thermodynamic Approach." In Colloid Stability, 1–83. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527631193.ch16.

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Russel, W. B. "Theoretical Approaches to the Rheology of Concentrated Dispersions." In Future Directions in Polymer Colloids, 131–49. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3685-0_8.

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Tadros, Tharwat. "Equation of State Approach." In Encyclopedia of Colloid and Interface Science, 456–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_87.

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Camargo, P. H. C., G. G. Nunes, D. J. Evans, G. J. Leigh, G. Tremiliosi-Filho, E. L. Sá, A. J. G. Zarbin, and J. F. Soares. "Single-source precursor and homometal approaches to the sol–gel synthesis of iron and titanium oxides." In Surface and Colloid Science, 221–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b97089.

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Conference papers on the topic "Colloidal approaches"

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HERMANSSON, A. M. "SUPERMOLECULAR AND COLLOIDAL FOOD STRUCTURES: NOVEL MICROSCOPIC APPROACHES." In Proceedings of the Fifth Royal Society–Unilever Indo-UK Forum in Materials Science and Engineering. A CO-PUBLICATION OF IMPERIAL COLLEGE PRESS AND THE ROYAL SOCIETY, 2000. http://dx.doi.org/10.1142/9781848160163_0005.

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Corredig, Milena. "Processing plant proteins colloidal structures." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/cyqr3105.

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Food systems need to be designed to better fit within planetary boundaries. It is not only important to find more sustainable protein sources, but also to create fully circular, robust supply chains. But this is only the beginning: new formulations will need to fit common dietary expectations. The utilization of plant-based protein ingredients present significant challenges in relation to their nutritional and technological functionalities. Today these proteins do not measure up when used as ingredients in conventional processes. Plant protein streams contain polydisperse colloids, and detailed studies of their behaviour during processing is only at their infancy. To predict their structure-function, their physical and chemical changes need to be followed at various length scales. Furthermore, for each food matrix, depending on the final product needs, it will be required to find the appropriate level of refinement and processing history, to reach the right balance between sustainability and processing/nutritional functionality. This is currently a significant knowledge gap. This talk will outline how processing dynamics at the molecular and supramolecular level, affect the interactions occurring with the various components in mixed matrices, and will aim to inspire researchers to find new processing and formulation approaches that will better fit plant-based ingredients utilization, and with this accelerate progress towards a shift to more sustainable diets.
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Stoian, Razvan-Ionut, Elijah Dale, D. Ganta, and A. T. Rosenberger. "Colloidal Semiconductor Quantum Dot Whispering-Gallery Microlaser – a Comparative Study of Two Approaches." In Conference on Lasers and Electro-Optics. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/cleo.2009.jtud120.

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Machado, Noé Gabriel Pinheiro, Wilmmer Alexander Arcos Rosero, Wagner de Rossi, and Marcus Paulo Raele. "Femtosecond Production of Gold Nanoparticles Suitable for Nanobrachytherapy." In Latin America Optics and Photonics Conference. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/laop.2022.tu4a.53.

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The present work approaches the production of AuNPs through femtosecond laser ablation of a solid in a liquid media. Aiming at oncological applications, the stabilization of the colloidal solution was performed with non-cytotoxic material.
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Mahadevan, T. S., M. Milosevic, M. Kojic, F. Hussain, N. Kojic, M. Ferrari, and A. Ziemys. "Nanoparticle Transport Through Boundaries of Nanoporous Structures." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85775.

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In transport phenomena involving colloidal nanoparticle (NP) suspensions in complex environments, the inter particle interactions play an important role especially when the sizes of the confining environments approaches the particle sizes. Specific examples of such systems are encountered in NP transport through nanochannels used in drug delivery and nanofluidic cooling[1–5]. In ionic colloidal suspensions like the ones encountered in the above applications, the NPs acquire characteristic surface charges which results in a surface potential and a double layer of co- and counter-ions from the solution. DLVO theory predicts the interaction energy resulting from the double layer to be [6]:(1)Wr=64πkBTRρ∞γ2κ2exp-κr where r is the separation between NP surfaces, and R is the radius of the NP, ρ∞ is the concentration of ions in the suspension, κ−1 is the Debye screening length (characteristic size of the double layer) and kB and T are the Boltzmann constant and the temperature. As κ−1 approaches the size range of the particles, the interactions amongst the particles may span several times the particle size and contributes to particle diffusion.
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Айзенштадт, А. М., Ю. В. Соколова, Т. А. Дроздюк, and М. А. Авдушева. "INTERPHASE OF BUILDING COMPOSITIONS." In «АКТУАЛЬНЫЕ ВОПРОСЫ СОВРЕМЕННОЙ НАУКИ: ТЕОРИЯ, ТЕХНОЛОГИЯ, МЕТОДОЛОГИЯ И ПРАКТИКА». Международная научно-практическая онлайн-конференция, приуроченная к 60-ти летию член-корреспондента Академии наук ЧР, доктора технических наук, профессора Сайд-Альви Юсуповича Муртазаева. Crossref, 2021. http://dx.doi.org/10.34708/gstou.conf..2021.78.24.008.

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Целью данной работы является демонстрация нескольких методологических подходов к решению задач управления процессами трансформационных превращений вещества на границе раздела фаз макроповерхности и в дисперсных системах, которые можно, на наш взгляд, использовать в качестве критериев количественной характеристики одного из основополагающих законов научного направления «Геоника» - закона «Сродства структур». Предложенные подходы базируются на фундаментальных положениях физической и коллоидной химии, кристаллоэнергетики. В качестве данных критериев, позволяющих управлять структурообразованием на межфазной границе, предложены энергетическая интерпретация кинетической модели топохимического взаимодействия компонентов и значение аналоговой постоянной Гамакера. Разработаны методологические принципы экспериментального определения этих характеристик. Проведена апробация предложенных подходов на примере различных тонкодисперсных композиций: глиоксаль-кора, базальт-кора, базальт-полиминеральный кварцево-полевошпатовый песок и базальт-сапонит. Кроме того, коллоидно-химический подход к созданию суспензий на основе тонкодисперсных частиц горных пород, обладающих специфическими свойствами, позволяет синтезировать агрегативно устойчивые суспензии магнитных жидкостей. Приводятся примеры их использования в строительном материаловедении. This work aims to demonstrate several methodological approaches to solving problems of controlling the transformation processes of matter at the interface of the macro-surface and in dispersed systems, which, in our opinion, can be used as criteria for the quantitative characteristics of one of the fundamental laws of the scientific direction "Geonics" - the "Affinity of structures" law. The proposed approaches are based on the fundamental principles of physical and colloidal chemistry, crystal energy. The energy interpretation of the kinetic model of the topochemical interaction of thecomponents and the analog Hamaker constant value are proposed as these criteria make it possible to control the structure formation at the interface. We have developed the methodological principles for the experimental determination of these characteristics. We have tested the proposed approaches on various finely dispersed compositions: glyoxal-bark, basalt-bark, basalt-polymineral quartz-feldspar sand, and basalt-saponite. Besides, the colloidal-chemical approach to the creation of suspensions based on finely dispersed particles of rocks with specific properties makes it possible to synthesize aggregately stable suspensions of magnetic fluids. Examples of their use in building materials science are given.
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Contreras Lopez, Enrique, Farid Ahmed, and Jianzhi Li. "Synthesizing and Printing of Tin Oxide Nanoparticles Using a Single Ultrafast Laser System: A Feasibility Study." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85601.

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Abstract In laser-based manufacturing, processing setup customization is one of the popular approaches used to enhance diversity in material processing using a single laser. In this study, we propose setup design modification of an ultrafast laser system to demonstrate both Tin Oxide (SnO2) nanoparticle synthesis from bulk metal, and post printing of said nanoparticles using Laser Induced Forward Transfer (LIFT) method. Using the Pulse Laser Ablation in Liquid (PLA-L) method, nanoparticles were synthesized from a bulk tin metal cube submerged in distilled water. Such nanoparticles dispersed in water can form colloidal ink that can be used for different printed electronics applications. Pulse energy was varied to investigate the influence on morphological properties of the nanoparticles. It was observed that a decrease in average particle size, and an increase in the number of particles synthesized occurred as the pulse energy was increased. In our study, we adapted the same laser system to enable LIFT operation for printing of the SnO2 nanoparticles. The colloidal ink prepared was then used in LIFT method to study feasibility of printing the synthesized nanoparticles. By varying not only the laser parameters but process parameters such as coating thickness and drying time, printed results can be improved. Experimental results show great potential for both synthesizing and printing of the nanoparticles using a single laser system. This study serves as a proof of concept that a single laser system can turn bulk metal into nanoparticles-based applications without the need for extra processing from other machines/systems, opening the door to highly customizable prints with reduced lead times.
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Pitts, Katie Lieg, and Timothy Shedd. "Viscosity Studies of Aqueous Solutions of Hafnium Oxide Particles and Polystyrene Nanospheres." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30826.

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Nanoparticle colloidal system rheology has long been researched, without many concrete conclusions. Literature has been devoted to the viscosity and shear properties of these systems since Einstein’s PhD thesis. However, most models are based on molecular dynamics which are not necessarily applicable to real systems, and most real systems are modeled by empiricism. This report looks to unify these approaches through rheological testing and mathematical analysis in order to achieve several goals using a system composed of hafnium oxide particles suspended in water. The first goal is to have a viscosity model that fits not only empirical data, but also the relevant theory and first principles. By employing the modern techniques of a rhoemeter-on-a-chip to nano-scale particles, the limitations of traditional rheometry are bypassed. The molecular dynamics approaches are converted to zero-shear and infinite-shear viscosities which can be applied to traditional models. A modern model was then derived, applied to new data, and agreement was found to a satisfactory degree. No significant change in viscosity with shear rate was found experimentally or analytically. Traditional research is done with spherical particles, such as polystyrene nanopsheres, as which we are approximating hafnium oxide (HfOx) to be. Polystyrene nanospheres are nominally spherical and commercially available at relatively inexpensive costs. Actual spherical data was required for appropriate comparison, and the findings show that the spherical particles have distinct properties.
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Bronchy, Maxime, Jean-Charles Souriau, Jean-Marc Heintz, Celine Feautrier, David Henry, Etienne Duguet, Laurent Mendizabal, Gilles Simon, and Mona Treguer-Delapierre. "Low-temperature silver sintering by colloidal approach." In 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC). IEEE, 2020. http://dx.doi.org/10.1109/estc48849.2020.9229830.

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Yu, Muchun, Zhiling Niu, Peng Zhao, and Zijun Zhang. "A Novel Approach for Shock Absorber----Colloidal Damper." In 2nd International Conference on Computer Engineering, Information Science & Application Technology (ICCIA 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/iccia-17.2017.151.

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Reports on the topic "Colloidal approaches"

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Asher, Sanford A. Novel Approaches to Glucose Sensing Based on Polymerized Crystalline Colloidal Array Hydrogel Sensors. Fort Belvoir, VA: Defense Technical Information Center, December 2006. http://dx.doi.org/10.21236/ada631491.

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Asenath-Smith, Emily, Emma Ambrogi, Eftihia Barnes, and Jonathon Brame. CuO enhances the photocatalytic activity of Fe₂O₃ through synergistic reactive oxygen species interactions. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42131.

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Iron oxide (α-Fe₂O₃, hematite) colloids were synthesized under hydrothermal conditions and investigated as catalysts for the photodegradation of an organic dye under broad-spectrum illumination. To enhance photocatalytic performance, Fe₂O₃ was combined with other transition-metal oxide (TMO) colloids (e.g., CuO and ZnO), which are sensitive to different regions of the solar spectrum (far visible and ultraviolet, respectively), using a ternary blending approach for compositional mixtures. For a variety of ZnO/Fe₂O₃/CuO mole ratios, the pseudo-first-order rate constant for methyl orange degradation was at least double the sum of the individual Fe₂O₃ and CuO rate constants, indicating there is an underlying synergy governing the photocatalysis reaction with these combinations of TMOs. A full compositional study was carried out to map the interactions between the three TMOs. Additional experiments probed the identity and role of reactive oxygen species and elucidated the mechanism by which CuO enhanced Fe₂O₃ photodegradation while ZnO did not. The increased photocatalytic performance of Fe2O3 in the presence of CuO was associated with hydroxyl radical ROS, consistent with heterogeneous photo-Fenton mechanisms, which are not accessible by ZnO. These results imply that low-cost photocatalytic materials can be engineered for high performance under solar illumination by selective pairing of TMOs with compatible ROS.
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Shomer, Ilan, Louise Wicker, Uzi Merin, and William L. Kerr. Interactions of Cloud Proteins, Pectins and Pectinesterases in Flocculation of Citrus Cloud. United States Department of Agriculture, February 2002. http://dx.doi.org/10.32747/2002.7580669.bard.

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The overall objective was to understand the cloud flocculation of citrus juice by characterization of the interactions between proteins and pectins, and to determine the role of PE isozymes in catalyzing this phenomenon. Specific objectives were to: 1. identify/characterize cloud-proteins in relation to their coagulable properties and affinity to pectins; 2. to determine structural changes of PME and other proteins induced by cation/pectin interactions; 3. localize cloud proteins, PME and bound protein/pectates in unheated and pasteurized juices; 4. to create "sensitized" pectins and determine their effect on clarification. The original objectives were not changed but the methods and approach were modified due to specific research requirements. Two i postulates were: 1. there is a specific interaction of cloud proteins with de-esterified regions of ! pectin and this contributes to cloud loss; 2. isozymes of pectin-methyl-esterase (PME) vary in efficiency to create sensitized pectins. The appearance of citrus fruit juice is an important quality factor and is determined by the color and turbidity that .are conferred by the suspended particles, i.e., by the cloud and its homogeneity. Under some circumstances the cloud tend to flocculate and the juice clarifies. The accepted approach to explain the clarification is based on pectin demethoxylation by PME that promotes formation of Ca-pectate. Therefore, the juice includes immediate heat-inactivation upon ~ squeezing. Protein coagulation also promotes cloud instability of citrus fruit extracts. However, the clarification mechanism is not fully understood. Information accumulated from several laboratories indicates that clarification is a more complex process than can be explained by a single mechanism. The increasing trend to consume natural-fresh juice emphasizing the importance of the knowledge to assure homogeneity of fresh juice. The research included complementary directions: Conditions that induce cloud-instability of natural- juice [IL]. Evaluate purification schemes of protein [USA]. Identifications of proteins, pectin and neutral sugars ([IL]; Structure of the cloud components using light and electron microscopy and immuno-labeling of PME, high-methoxyl-pectin (HMP) and low-methoxyl-pectin (LMP); Molecular weight of calcium sensitized pectins [US]; Evaluation of the products of PME activity [US]. Fractions and size distribution and cloud components [IL-US]. The optimal pH activity of PME is 7 and the flocculation pH of the cloud is 3-4. Thus, the c roles of PME, proteins and pectins in the cloud instability, were studied in pH ranges of 2- 7. The experiments led to establish firstly repeatable simulate conditions for cloud instability [IL]. Thermostable PME (TS-PE) known to induce cloud instability, but also thermolabile forms of PME (TL-PE) caused clarification, most likely due to the formation and dissolution of inactive :. PE-pectin complexes and displacement of a protective colloid from the cloud surface [US]. Furthermore, elimination of non-PME protein increases TS-PE activity, indicating that non-PME proteins moderate PME activity [US]. Other experiments Concomitantly with the study of the PME activity but promotes the association of cloud-proteins to pectin. Adjusting of the juice pH to f 7 retains the cloud stability and re-adjusting of the pH to 40% DE reacts to immuno-labeling in the cloud fragments, whereas
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