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Dissertations / Theses on the topic 'Non-aqueous synthesis'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Rajaeian, Babak. "Synthesis of polymeric nanocomposite membranes for aqueous and non-aqueous media." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/410.

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Thin film composite (TFC) membranes have long been used by many large-scale applications (i.e., water and wastewater treatment). Recently, conventional polymeric TFC membranes are facing with short longevity due to high fouling tendency and susceptibility at extreme operational conditions. On the other hand, ceramic membranes are also suffering from disadvantages like low selectivity, unreliable control over porosity and pore size which makes it difficult to achieve a reproducible final product. The aim of this project was to develop a high selective TFC membranes incorporated by functionalize

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2

Petkar, Sagar Sudhir. "Non-aqueous synthesis and reactivity of hexanuclear polyoxotungstates." Thesis, University of Newcastle Upon Tyne, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401838.

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3

Redshaw, Carl. "Oxo and organoimido precursors for non-aqueous polytungstate synthesis." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328135.

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4

Shakir, Sa'ed A. "Studies of stabilization of non-aqueous polymer dispersions with diblock copolymers." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/19421.

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A diblock copolymer of Poly (Styrene-b- [ethylene-co-propylene]) has been used as a stabilizer in non-aqueous dispersion polymerizations of methyl methacrylate and vinyl acetate in n-heptane. The particles thus produced were stabilized by well defined surface layers of ethylene-propylene copolymer chains. The dependence of the particle size on the stabilizer, monomer and initiator concentrations was studied. Both seeded and one-shot polymerization techniques were investigated. Polymer particles were characterized by transmission electron microscopy to determine particle shape and size. The lon

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5

Jones, Denise Michelle. "Specific interactions of deoxynucleosides with potassium cations in non-aqueous media." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/27258.

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6

Ward, Andrew David. "A study of the single-shot dispersion polymerisation of ethyl methacrylate in non-aqueous media." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240730.

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7

Fernandez, Salazar Franz Rene. "A thermodynamic study on cation dibenzocryptand 222 and cation-dibenzo 18 crown 6 complexation in non-aqueous media." Thesis, University of Surrey, 1988. http://epubs.surrey.ac.uk/844484/.

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A general review on macrocyclic ligands with particular emphasis to dibenzocryptand 222 and dibenzo 18 crown 6 is given in the first part of the thesis (Chapter 1). This is followed by an exhaustive literature survey on the stability constants (hence free energies of complexing), enthalpies and entropies of metal cations with cryptands (dibenzocryptand 222, benzocryptand 222, cryptand 222) and crown ethers (dibenzo 18 crown 6, benzo 18 crown 6, 18 crown 6) in water and in non-aqueous solvents at 298.15 (Chapter 2). The experimental part (Chapter 3) also includes a detailed description of the p

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8

Chefson, Amandine. "Towards the use of P450 enzymes in synthesis : cofactor replacement and activity of CYP3A4 in non-aqueous media." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100784.

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Enantioselective synthesis is one of the most important challenges of today's synthetic chemists. In particular, the hydroxylation of non-activated C-H bonds remains a significant challenge that few chemical catalysts have succeeded to overcome. The P450 enzymes, a family of heme-containing monooxygenases including more than 5000 known isoforms, are gaining considerable attention due to their ability to catalyze the very difficult regio- and stereo-selective oxidation of inactivated C-H bonds. The use of such enzyme is however limited by their functional complexity, low activity, need for cofa

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9

Huston, Michael Edward. "Synthesis and study of anthrylmethylpolyamine conjugate fluorescence probes for metal and non-metal ion detection in aqueous solutions /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487683049375178.

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10

Gabathuse, Anne Onalethata. "Synthesis of enantio-pure amides by reversal of the Geobacillus pallidus RAPc8 amidase hydrolysis reaction in non-aqueous media." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/16916.

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Amidases are hydrolytic enzymes that catalyze the hydrolysis of amides to their corresponding carboxylic acids and ammonia. Amidases are ubiquitous in nature, and they have been isolated from a wide range of microorganisms, the most common source being bacteria. Amidases are recognized as potential industrial biocatalysts in processes that involve the synthesis of chiral compounds, mostly used in the pharmaceutical, agrochemical and food industries. The discovery of amidases from extremophiles has increased the potential for application of these enzymes for the development of new processes. In

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11

Belsey, Kate. "The synthesis of novel block copolymers via atom transfer radical polymerisation for use as stabilisers in non-aqueous dispersion polymerisations." Thesis, University of Kent, 2015. https://kar.kent.ac.uk/50452/.

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Colloidal polymeric particle dispersions have found many industrial applications, one of which is as the ‘ink’ particles within electrophoretic displays. Traditionally these displays have shown high resolution, increased battery life and excellent readability in sunlight, when compared with more commonly used displays, such as liquid crystal displays (LCDs). However, commercially available examples have only demonstrated black and white displays, or screens with coloured filters over the black and white particles, resulting in ‘washed out’ colours. The development of a full colour electrophore

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12

WAHBA, LAURA. "The growth of in situ sol-gel silica in natural rubber. Synthesis, morphological and mechanical characterization of the composites." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/40133.

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Great interest was recently devoted to the use of inorganic particles as a reinforcing filler in tires for the automotive industry. In fact,the reinforcing of elastomers by the addition of these fillers affects the stiffness, strength, elongation at break, fracture toughness, energy dissipation (rolling resistance), friction to ice or wet grip, wear (abrasion resistance)and on the material processability. Therefore, the technology improvement of tires currently has to satisfy the requirements of sustainable development in order to reduce fuel consumption, environmental pollution and acoustic

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13

Lemarchand, Alex. "Synthèse par chimie douce et étude structurale de nanocristaux d'oxydes métalliques." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0110/document.

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Ce travail concerne la synthèse et la caractérisation structurale de nanocristaux de faible taille (~1-3 nm) d’oxydes métalliques simples, à savoir le dioxyde de titane (TiO2), le dioxyde d’étain (SnO2) et le monoxyde de zinc (ZnO). Les synthèses ont été réalisées au moyen de méthodes sol-gel non-aqueuses voire strictement non-hydrolytiques sous contrôle cinétique. La caractérisation structurale s’est principalement appuyée sur la diffraction des rayons X, la microscopie électronique en transmission et la méthode des fonctions de distribution de paires atomiques, obtenues grâce à la diffusion

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14

Lawrence, M. J. "Physico-chemical and solubilisation studies on aqueous solutions of synthetic non-ionic surfactants." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370951.

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15

Göring, M., A. Seifert, K. Schreiter, P. Müller, and S. Spange. "A non-aqueous procedure to synthesize amino group bearing nanostructured organic–inorganic hybrid materials." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-152006.

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Amino-functionalized organic–inorganic hybrid materials with a narrow distributed nanostructure of 2–4 nm in size were obtained by means of a template-free and non-aqueous procedure. Simultaneous twin polymerization of novel amino group containing twin monomers with 2,2′-spirobi[4H-1,3,2-benzodioxasiline] has been applied for this purpose. The amino groups of the organic–inorganic hybrid material are useful for post derivatization<br>Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

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16

Cabuil, Valérie. "Ferrofluides a base de maghemite : synthese, proprietes physicochimiques et magneto-optiques." Paris 6, 1987. http://www.theses.fr/1987PA066001.

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Les ferrofluides etudies sont constitues de particules de maghemite solubilisees en milieu aqueux (ferrofluides ioniques) ou non aqueux (ferrofluides surfactes). Le mode de synthese permet de controler les caracteristiques des grains (taille et densite superficielle de charge)

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17

Lin, Hong-Wei, and 林弘偉. "Synthesis of Dense Non Aqueous Suspension of Nano-Scale Zero Valent Iron." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/40281274542180714067.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>99<br>In recent years, suspended colloidal zero valent iron nanoparticles have been applied to the dechlorination of aqueous chlorinated solvents in polluted groundwater. However, due that nonaqueous chlorinated solvents and water are immiscible, nonaqueous chlorinated solvents could not react with aqueous colloidal zero valent iron nanoparticles. To overcome the drawback, eco-friendly dense nonaqueous suspensions of nano-scale zero-valent iron (DNAPNZVI) were developed. In this study, dimethyl carbonate (DMC) was chosen as the surface-modified nano zero valent ir

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18

Chowdary, Ghanta Venkaiah. "Investigations on the lipase catalyzed reactions in non-aqueous systems for ester synthesis." Thesis, 2002. http://hdl.handle.net/2009/2683.

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19

Lee, Tzong-Ming, and 李宗銘. "Non-Aqueous Syntheses and Properties of Epoxy and Polyamideimide Silica Hybrid Nano Composites." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/09112214424628621895.

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博士<br>國立清華大學<br>化學工程學系<br>94<br>The design of inorganic nano silica into polymer matrix to form a polymer-nanosilica hybrid has been proven to be an effective way to improve the thermal and mechanical properties of polymers. A non-aqueous synthetic method to prepare nanometer scale silica in both epoxy and polyamideimide resin has been established through direct thermal heating under catalyst in this study. In the first part of this study, a series of epoxy-bridged ethoxysilane precursors have been synthesized by reacting multifunctional aminoalkoxysilanes with diglycidyl ether of bisphenol-A

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